Flammable material catch fire and burn easily option -A is correct answer.
What kind of substances are flammable?A liquid is flammable if it has a flash point lower than 100°F. Examples include alcohols, acetone, toluene, gasoline, and acetone. At normal ambient temperatures, there is a risk that ignitable vapors will form.
In well-ventilated areas, store, handle, and use liquids that are flammable and combustible. Utilize approved tools, such as clearly marked safety containers, when handling flammable and combustible liquids. Closing containers when not in use is a good idea. If you're moving flammable or combustible liquids, bond and grind metal containers.
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4. Is it possible to inherit Huntington's from one of your parents? Why or why not?
Yes, you can inherit it only if your mother has it.
No, it is not a hereditary disease.
Yes, you inherit traits from both parents.
No, you can inherit it only if both parents have it.
Answer:
Yes, you inherit traits from both parents.
Explanation:
With time, Huntington's disease impairs several areas of the brain's functionality. It is something that a person inherits from their parents. It frequently becomes deadly after up to 20 years of progressively worsening symptoms.
When the dry ingredients of a cake are combined, what is the result?
atom
compound
mixture
element
When the dry ingredients of a cake are combined, the result is a mixture. Option 3.
What are mixtures?In chemistry, mixtures are substances that are obtained by mixing two or more chemically different substances together with each substance maintaining its chemical identity. In other words, the components of a mixture are still chemically unique and can be separated by physical means.
Mixtures can be homogeneous or heterogeneous. Homogenous mixtures are mixtures in which the components are uniformly dispersed throughout the entire mixture. For heterogeneous mixtures, the components are not uniform throughout the mixture.
Thus, when the dry ingredients of a cake, such as flour, sugar, etc., are combined, what we are going to have is a mixture. Whether this mixture would be homogenous or heterogeneous will depend on the level of mixing. Whatever the case may be, the components can still be separated by physical means.
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What is the question Ghez and her graduate students are still trying to answer?
The question Ghez and her graduate students are still trying to answer is -why there are more youthful stars than older ones.
When was the black hole found by Andrea Ghez?
The orbits of stars racing past the black hole were not independently mapped until 2000 by Andrea Ghez and Reinhard Genzel. These orbits demonstrated that the hidden object could not be anything else because of its enormous mass and small size.
The stars included several newcomers. Near a black hole, new stars shouldn't exist. Theoretically, any cloud of gas and dust would be shattered before it could develop into a star. The existence of such young stars continues to elude Ghez and other astronomers.
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Explain how the two atoms in a chlorine molecule are held together
The chlorine atoms can be held together by the dispersion forces.
How are the chlorine atoms held together?We know that the chlorine atoms are the atoms that we could say that they have an electronegativity value that is almost the same. As such we can see that the the compound is non polar.
Given the fact that the compound is non polar, the atoms would be held together by a kind of bond that not polar in nature and these are the dispersion forces that hold the non polar molecules together.
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what other information do you need in order to determine the molecular formula from the empirical formula of a compound?
We need to know the molecular mass in order to determine the molecular formula from the empirical formula of a compound.
Molecular formula is formed from the actual number of elements that are involved in forming the molecule whereas empirical formula is the reduced ratio of the elements present in the compound.
We can determine the empirical formula of a substance by taking the subscripts of the molecular formula and reducing it to simplest whole number ratio.
we can calculate the molecular formula as:
n = molecular mass/ empirical formula mass
where n is any positive number.
Thus, when molecular mass is known , molecular formula can be determined form the empirical formula of a compound.
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Item 4
What is the ratio of the balanced coefficients of this reaction?
(NH:)N +
_S --> (NH₂)₂S+ N₂
The balanced equation of the given reaction is 4(NH:)N +_S --> (NH₂)₂S+ 2N₂. And the ratio of coefficient is 4:1:1:2.
Chemical equations are symbols and chemical formulas that depict a chemical reaction symbolically.A chemical equation that is balanced has equal amounts of each element's atoms on both sides of the equation and conserves mass.You can solve equations on your own by adhering to some basic guidelines:Verify if the equation's formulas are all accurate.Focus on just one element at a time.In balancing, huge numbers are added. A chemical formula cannot have any little numbers changed.Recheck each component, then repeat step 3 as necessary.For more information on balanced equation kindly visit to
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the natural abundance of calcium in the earth's crust is 3.4% by mass. how many calcium atoms are present in a 1.50 g sample of the earth's crust?
If calcium makes up 3.4% by mass of Earth's crust, the grams of calcium present if a sample of Earth's crust has a mass of 1.5 g is 0.051 g.
How to calculate mass?
The mass of an element in a sample can be calculated by multiplying the percent abundance of that element by the mass of sample.
According to this question, calcium makes up 3.4% by mass of Earth's crust. If a sample of Earth's crust has a mass of 1.5 g, the mass of calcium present can be calculated as follows:
mass of calcium = 3.4/100 × 1.5 g
mass of calcium = 0.051 g
Therefore, if calcium makes up 3.4% by mass of Earth's crust, the grams of calcium present if a sample of earths crust has a mass of 1.5 g is 0.051 g.
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which of the following is an intensive property? A. length, B. 45.0 C. Brittle D. 3.5 cm
The option that is an intensive property is brittle (option C).
What is an intensive property?Intensive property of a material is that property that does not depend on the amount or shape of the material, a property of the material at a specific point in space.
The properties of matter that do not depend on the size or quantity of matter in any way are referred to as an intensive property of matter.
Intensive properties of matter include the following: temperature, density, colour, melting and boiling point, etc., because they will not change with a change in size or quantity of matter.
Therefore, brittleness is an intensive property of a material.
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what is the difference between an ore vein and a disseminated deposit? which ones are easier to mine?
Ore veins and disseminated deposits are differ in terms of their size, shape, and distribution.
An ore vein is a large, continuous body of mineral deposits that are typically found in fractures or voids in rock formations. Ore veins are typically formed when minerals that are dissolved in water fill a void or crack in a rock formation. Ore veins are typically quite large and can be several meters in width and several kilometers in length. They are also typically found at depths of several hundred meters or more. Ore veins are generally easier to mine because they are more concentrated and can be more easily accessed through underground mining methods.
A disseminated deposit, on the other hand, is a type of mineral deposit that is dispersed or scattered throughout a larger rock formation. Disseminated deposits are usually smaller and less concentrated than ore veins and are typically found at shallower depths. They are often harder to mine because the minerals are not as concentrated and are more dispersed throughout the rock formation
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The average body temperature is 98.6 degrees F or 37 degrees C. Based on what you know about temperature loss since time of death calculate the body temperature for each hour up to 24 hours after death (starting with 1 hour after death)
Rectal temperature is deducted from the average body temp of 98 farenheit since the algorithm estimates that body loses 1.5 degrees every hour.The period since death is roughly calculated by dividing the differences between the two by 1.5.
How is the death date determined?The Glaister Equation determines the number of hours that elapse after dying as a linear model of the decedent's body temperature.(98.7 degrees Fahrenheit - the deceased's body temperature).
How soon after death does the corpse become cold?Skin and bone cells can continue to function for several days.A human body takes about 12 hours so cool to the feel & 24 hours too cool completely.Following three hours, rigor mortis begins and lasts for 36 hours following death.
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Which element in group iia will have the highest melting temperature?
Answer:
Tungsten
Explanation:
Tungsten is a steel-gray or silver-white metal with high hardness, high melting point, and resistance to air erosion at room temperature. As a refractory metal (generally, the melting point is higher than 1650℃) with the highest melting point, it has good high-temperature strength.
from your observations in step 7, what can you conclude about the relative equilibrium concentrations of cro42- (aq) ion in each of the solutions 0.1 m k2cr2o7 and 0.1 m k2cro4 before the ba(no3)2 solution is added?
Chromate anion is basically situated in the chromate salt. These oxoanions also possess the property of the oxidizing agent. The presence of chromate and dichromate anions results in chemical equilibrium. It is commercially used to prevent corrosion.This is because of Le Chatelier's Principle.
According to the Le Chatelier principle, when a dynamic equilibrium system is perturbed by a change in, say, pressure, temperature, or the concentration of products or reactants, the equilibrium will shift in the opposite direction to make up for the disturbance.
To further grasp this idea, consider the following example:
in the case of an equilibrium general reaction:
A (g) + B (g) <=> C (g) + D (g) (g) ΔH < 0 (it denotes an exothermic process) (it means an exothermic reaction)
The following is an example of this reaction:
A (g) + B (g) <=> Energy is released when an exothermic reaction occurs between C and D.
If the temperature increases or heat is added, the equilibrium will shift to the left because of the principle.
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Luke investigated the heating of water. He predicted that the rise in temperature would
depend on the volume of water.
The diagram shows the apparatus he used.
a. Why did Luke need to know the temperature of the water at the beginning and at the
end of the experiment?
Answer:
Explanation:
When Luke stirs the water, the particles from bottom to top and vice-versa, and hence the heat is transferred to all the water molecules.
The mode of transfer of heat here is convection.
When he stirs water then the water molecules from the top ( away from the flame ) travel to the bottom ( towards the flame ) and hence water gets heated uniformly leading to a good observation.
Due to uniform heating of water which leads to good observations.
A 2-kg object is moving horizontally with a speed of 4 m/s. How much net force is required to keep the object moving bat this speed and in this direction? Explain.
Answer: 8N (8 kg/ms")
Explanation: F= M*A
F= (2KG)*(4/MS") = 8N
what has very good electrical conductivity
what is the maximum amount of flammable liquids that can be stored outside of a rated flammable cabinet in a laboratory?
The maximum amount of flammable liquids that can be stored outside of a rated flammable cabinet in a laboratory is 25 number of gallons.
To make certain flammable drinks are remoted from incompatible substances, they need to simplest be saved in a flammable cupboard this is used simplest for the garage of Class three Flammable Liquids. Extra care should be taken now no longer to take flammable drinks into regions of the laboratory which are the usage of incompatible substances.
The most quantity of flammable drinks that you could save in a single flammable cupboard is primarily based totally at the chemical's Flash Point and Boiling Point. No extra than 60 gallons of a Category 1, 2 or three flammable liquid or a hundred and twenty gallons of a Category four flammable liquid can be saved in a Flammable Safety Cabinet.No extra than 25 gallons of flammable drinks will be saved in a room outdoor of an permitted garage cupboard.
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need help asap please
I doiont know tbh
Explanation:
what atomic or hybrid orbitals make up the sigma bond between and in acetic acid, ? ( is the second carbon in the structure as written. is the first oxygen in the structure as written.) orbital on orbital on what is the approximate bond angle? angle
(a) sp2- hybrid orbital of C1 and p-orbital of O1 , because, central atom i.e. carbon has sp2-hybridization and in surrounded oxygen atom last electrons enters in p-orbital. (b) 1200 bond angle, because shape is trigonal planar.
Atomic orbitals are generally specific through a mixture of numerals and letters that constitute precise residences of the electrons related to the orbitals—for example, 1s, 2p, 3d, 4f. The numerals, referred to as primary quantum numbers, imply strength degrees in addition to relative distance from the nucleus. The simple names s orbital, p orbital, d orbital, and f orbital refer to orbitals with angular momentum quantum number ℓ = 0, 1, 2, and 3 respectively.
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How does the solubility of a gas in a solvent depend on pressure and temperature?
The solubility of a gas is directly proportional to the pressure and proportional to the temperature.
As we increase the pressure of a gas its collision frequency increases hence solubility increases as we decreases the pressure the solubility decreases. Collision frequency is defined as the collision of atoms on increasing pressure atoms start moving from one place to another. The relationship pressure is linear with solubility. It is defined by Henry's law.
The effect of temperature depends on the nature of solute and solvent.
Basically, as we increase the temperature in gas phase solubility also increases.
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Which scientist help developed the current model of the atom which states that electrons are located in regions known as orbitals or electron clouds?
Neil Bohr is the scientist help developed the current model of the atom which states that electrons are located in regions known as orbitals or electron clouds.
The current model of the atom, which states that electrons are located in regions known as orbitals or electron clouds, is known as the quantum mechanical model of the atom. This model was developed through the contributions of several scientists, including:
1. Niels Bohr: Bohr developed a model of the atom in which the electrons were confined to specific energy levels, or shells, around the nucleus. This model was able to explain many of the observed properties of atoms, such as the emission and absorption spectra of light.
2. Wolfgang Pauli: Pauli proposed the existence of a new type of particle, called the electron spin, which could explain the observed properties of atoms.
3. Erwin Schrödinger: Schrödinger developed a mathematical equation, known as the Schrödinger equation, which could be used to describe the behavior of particles, including electrons, in atoms.
4. Paul Dirac: Dirac developed a mathematical equation, known as the Dirac equation, which could be used to describe the behavior of particles, including electrons, in atoms. This equation incorporated the principles of both quantum mechanics and special relativity, and it predicted the existence of antimatter.
Overall, these scientists and their work contributed significantly to the development of the current model of the atom, which is based on the principles of quantum mechanics.
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when preparing sequencing-reaction tubes, each of the four dntps are added, but just one kind of ddntp. which are used in the highest concentrations, the dntps or the ddntps, and why?
Because ddNTPs are only intended to be added occasionally to ensure that strands of all lengths are produced, dNTPs are used at the highest concentrations in sequencing reactions.
The DNA sequencing response consists of four major ingredients: "Template" Genetic material copied by E. coli; free bases, this same four types of DNA building blocks; short dna called "primers"; and Enzyme dna, the enzyme which copies DNA. The reaction is began by heating the two dna strands till the they separate. The template then anneals/binds towards its intended location, and DNA polymerase begins elongating it. If expected to complete, a fresh dna strand would be formed. A nucleoside triphosphate contains a trna molecule bound to a 5-carbon sugar with phosphate groups bound to the sugar. They are the single - molecule forerunner of both DNA and RNA, that are chains of nucleotides formed during the DNA replication process.
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cluster decay is a type of radioactivity like alpha decay, except instead of spitting out a helium nucleus, it expels something bigger. what is the atom resulting from uranium-235 (u) emitting a magnesium-28 (mg) nucleus? (write your answer in the standard u-235 format.)
A radioactive atom emits a cluster of neutrons and protons-235 heavier than an alpha particle in a process known as cluster decay.
Cluster decay, also known as heavy particle radioactivity or heavy ion radioactivity, is a very uncommon form of nuclear decay in which an atomic nucleus generates a small "cluster" of neutrons and protons, more than in an alpha particle but less than a typical binary fission fragment. The cluster size is also produced by ternary fission into three fragments. When the parent nucleus loses protons, it becomes the daughter nucleus, which has an atomic number Zd = Z + Ze and a mass number Ad = A Ae, where Ae = Ne + Ze. [1] For instance
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a government agency recommends that the amount of arsenic in drinking water should not be above 0.01 ppm. at this concentration, how many grams of arsenic would you expect to find dissolved in 1000 ml of pure water?
The formula for PPM =100 /1,000,000=0.01 PPM = 100 / 1 , 000 , 000 = 0.01 . i.e concentrations of arsenic should be less than 0.01 *1000 therefore it should be less than 10 ml for 1000ml of water.
This stands for "parts per million" and can alternatively be written as mg/L (milligrams per liter). The mass of a chemical or contamination per volume of water is the unit of measurement here. On a lab report, ppm or mg/L both signify the same thing. It provides information about a substance's density when it is dissolved in water. Examples include total alkalinity, calcium hardness, and free chlorine. A substance has a PPM of 1 if it makes up one millionth of the entire amount of water.
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a mass of 48.5 g of a certain substance can be dissolved in 29.1 ml of water at 20 degrees c calculate solubility of this substance per gram of water
A mass of 48.5 g of a certain substance can be dissolved in 29.1 ml of water at 20° C, the solubility of this substance is 1.67 g.
We know that, Density of water = 1 g / mL
= 29.1 mL x 1 g
= 29.1 g water
Solubility = (Mass of solute / Mass of solvent) × 100
= ( 48.5 g / 29.1 g ) × 100
= 167 g
Here, Solubility of substance is 167 g per 100 gm of water
So, 167 × 1 / 100 = 1.67 g of the substance can be dissolved per gram of water.
Thus, 1.67 g of the substance can be dissolved per gram of water.
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What is the IUPAC name for the compound N₂O3?
Answer: Dinitrogen trioxide
Explanation:
which type of substance is fast acting, either immediately suffocating the victim or causing massive burning?
Substance is fast acting, either immediately suffocating the victim or causing massive burning is chemical weapons.
Chemicals used to intentionally kill or damage people through their poisonous qualities are known as chemical weapons. Chemical weapons also include weapons, apparatus, and other gear made expressly for turning hazardous substances into weapons.
What chemical weapon has the highest lethality?
What VX is VX is a nerve toxin that was created by humans for use in chemical warfare. The most dangerous and quickly acting of the known chemical warfare agents are nerve agents.
Basically, these weapons were just common munitions like grenades and artillery rounds that had well-known industrial chemicals added to them. Among the chemicals employed were chlorine, mustard gas, which causes terrible skin burns, and phosgene, a choking toxin.
The most critical effects are paralysis of the respiratory muscles and inhibition of the respiratory center. Ultimately, death results due to respiratory paralysis. If the concentration of the nerve agent is high, death is immediate.
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how many moles of chloride ions are there in a mixture of 2mol of barium chloride and 1 mol of pottassium chloride
The chloride ions in a mixture of 2mol of barium chloride and 1 mol of potassium chloride are 3 moles
What is Barium chloride?Generally, Barium chloride is an inorganic compound with the formula BaCl2. It is a white solid that is highly soluble in water. It is commonly used as a test for detecting the presence of sulfates in a solution and as a precursor to other barium compounds. Barium chloride is toxic if ingested, so it should be handled with caution.
There are a total of 3 moles of chloride ions in the mixture of 2 moles of barium chloride and 1 mole of potassium chloride.
Barium chloride contains 2 moles of chloride ions, and potassium chloride contains 1 mole of chloride ions, for a total of 2 + 1 = 3 moles of chloride ions.
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What effect did sugar have in the reaction with vinegar and food coloring with the egg shell?
Sugar have no observable effect on the reactions of vinegar. Because, vinegar is 90% of water it only affect the taste of the solution.
What is vinegar?Vinegar is diluted acetic acid. The acetic acid is the simplest organic acid after formic acid HCOOH. Acetic acid is CH₃COOH, and it is weakly acidic. Vinegar is made of diluted acetic acid. It is 90% of water.
Vinegar is used as preservatives in food. It is commonly used in pickles, salads etc. The egg washed by vinegar will easily remove the egg shell. There is no observable change in the reactions of vinegar caused by sugar.
Sugar changes the taste of the vinegar solution but does not make a change in its chemical properties, therefore, the action of vinegar towards egg and food preservation is not changing.
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rank the speed of sound in the following substances from slowest to fastest: steel 25°C air, 50°C air, and water. defend your predictions using the kinetic theory of matter.
The speed of sound in given substances from slowest to fastest: 25°C air, 50°C air, water, steel.
What are sound waves?Sound can transmit through liquids, gases, solids, and plasma as longitudinal waves, these are also known as compression waves. Sound waves need a medium to travel so they can be propagated through solids as longitudinal and transverse waves.
Longitudinal sound waves exhibit alternating pressure deviations leading to compression and rarefaction, while transverse waves exhibit alternating shear stress perpendicular to the propagation path.
Waves can cause matter to move up and down but can not carry along with them. As the temperature of the air increases the molecules start to vibrate faster eventually the speed of the sound increase.
The speed of sound is lowest in gases, faster in water, and fastest in steel (solid).
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in a closed system at 40 c a liquid has vapor pressure of 50 kpa. the liquids normal boiling point would be
in a closed system at 40 c a liquid has vapor pressure of 50 kpa. the liquids normal boiling point would be 60∘ C.
60∘ C. The temperature at which a liquid's vapor pressure equals 101.325 kPa is the liquid's usual boiling point. We are informed that this liquid has a vapor pressure of 50 kPa at 40 °C. Therefore, we must raise the vapor pressure above its existing level in order to induce this liquid to boil.
A liquid's boiling point changes depending on the pressure being applied; the normal boiling point is the temperature at which the vapour pressure is equal to the average atmospheric pressure at sea level (760 mm [29.92 inches] of mercury). Water boils at sea level at 100° C (212° F).
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