Answer:
96mg
Explanation:
Since the half-life of Palladium-100 is 4 days and the sample has been reduced after 16 days, that means the sample has undergone four half-lives. To find the intial mass, just work backwards:
6 x 2= 1212 x 2= 2424 x 2= 48 48 x 2= 96As you see, I've worked backwards from the four half-lives. So the initial mass after 16 days is 96 mg.
Complete the sentence.
Atoms form chemical bonds to satisfy the ______
rule and to become _______
if your going down a hill what type of energy are you making?
Answer:
Gravitational potential energy - into Kinetic energy
Explanation:
an atom of ordinary hydrogen consists of an electron and a
Answer: hydrogen atom is an atom of the chemical element hydrogen. The electrically neutral atom contains a single positively charged proton and a single negatively charged electron bound to the nucleus by the Coulomb force.
Explanation:
An atom of ordinary hydrogen consists of one electron and one proton and zero neutrons.
What is a hydrogen atom?Hydrogen is a chemical element placed at the top of group 1 in the periodic table and is represented by the chemical symbol H and atomic number 1.
A hydrogen atom is the lightest atom of the element in the whole periodic table. Hydrogen exists as a gas of diatomic molecules having the formula H₂ at standard conditions. Hydrogen gas is tasteless, colorless, odorless, non-toxic, and highly combustible.
Hydrogen is constituting roughly 75% of all normal matter and is the most abundant chemical substance in the universe. Most of the hydrogen element on Earth exists in forms like water and organic compounds. Each atom of hydrogen (¹H) has one proton, one electron, and no neutrons.
Hydrogen element is nonmetallic and easily forms a single covalent bond with most nonmetallic elements, forming compounds like water.
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Which option is a key point of cell theory? Cells can repair neighboring cells, but not themselves.Cells can repair neighboring cells, but not themselves. , , Cells are the basic structural unit of all living organisms.Cells are the basic structural unit of all living organisms. , , All cells that make up an organism are similar to each other.All cells that make up an organism are similar to each other. , , Some cells can burn food molecules to release energy, but some cannot.
Answer:
Cells are the basic structural unit of all living organisms.
Explanation:
Hope this helps, but i'm unsure if it would be multiple choice or not.
Oxygen and Oxygen Ionic or Covalent? Defense how do you know
Answer:
oxygen are covalent bonds because they require 2 more electrons to obtain their octet shell
so when they combine with any other element, they form a covalent bond
Explanation:
Oxygen requires two shared electrons to fill its outermost shell therefore to covalent bonds form.
Infrared waves travel at a speed of 3.00 x 10^8 m/s. What is the frequency of an infrared wave
that has a vacuum wavelength of 5.5 micrometers?
(1 micrometer= 1x10^-6 m)
O 5.5 X 10^12 Hz
O 5.5 x 10^10 Hz
O 5.5 X 10^11 Hz
O 5.5 X 10^13 Hz
The frequency of the infrared wave at the given speed and wavelength is [tex]5.5 \times 10^{13} \ Hz[/tex].
The given parameters;
speed of the wave, v = 3 x 10⁸ m/swavelength of the wave, λ = 5.5 μmThe frequency of the infrared wave is calculated by using wave equation as shown below;
v = fλ
where;
f is the frequency of the wave[tex]f = \frac{v}{\lambda} \\\\f = \frac{3\times 10^8}{5.5 \times 10^{-6}} \\\\f = 5.5 \times 10^{13} \ Hz[/tex]
Thus, the frequency of the infrared wave at the given speed and wavelength is [tex]5.5 \times 10^{13} \ Hz[/tex].
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What is the theoretical yield of sodium chloride when 8.3 g of sodium is reacted with 4.5 g of chlorine? 2Na(s) + Cl2(g) → 2NaCl(s)
The theoretical yield of sodium chloride when 8.3 g of sodium react with 4.5 g of chlorine is 3.30 g
We'll begin calculating the masses of Na and Cl that reacted and the mass of NaCl produced from the balanced equation.
2Na + Cl₂ —> 2NaClMolar mass of Na = 23 g/mol
Mass of Na from the balanced equation = 2 × 23 = 46 g
Molar mass of Cl₂ = 2 × 35.5 = 71 g/mol
Mass of Cl₂ from the balanced equation = 1 × 71 = 71 g
Molar mass of NaCl = 23 + 35.5 = 58.5 g/mol
Mass of NaCl from the balanced equation = 2 × 58.5 = 117 g
SUMMARY
From the balanced equation above,
46 g of Na reacted with 71 g of Cl₂ to produce 117 g of NaCl
Next, we shall determine the limiting reactant.From the balanced equation above,
46 g of Na reacted with 71 g of Cl₂
Therefore,
8.3 g of Na will react with = (8.3 × 71)/46 = 12.81 g of Cl₂
From the calculation made above, we can see that a higher amount (i.e 12.81 g) of Cl₂ than what was given (i.e 4.5 g) is needed to react completely with 8.3 g of Na.
Therefore, Cl₂ is the limiting reactant and Na is the excess reactant
Finally, we shall determine the theoretical yield of NaCl by using the limiting reactant (i.e Cl₂)From the balanced equation above,
71 g of Cl₂ reacted to produce 117 g of NaCl.
Therefore,
4.5 g of Cl₂ will react to produce = (4.5 × 117)/71 = 3.30 g of NaCl
Thus, the theoretical yield of NaCl produced is 3.30 g
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Answer:
The correct answer is 7.4 g NaCl
Explanation:
what is the difference in chemical energy between organic and inorganic materials?
Answer:
the difference is the presence of a carbon atom
Explanation:
renal calculi contain crystallized calcium, magnesium, and uric acid. explain why patients with hyperparathyroidism would be at risk for developing renal calculi.
Patients with hyperparathyroidism would be at risk for developing renal calculi because of high calcium levels excreted by the kidney.
Hyperparathyroidism occurs when there is over secretion of parathyroid hormone by the parathyroid glands.
The parathyroid hormone is responsible for the following in the body:
Release of calcium by bones into the bloodstream. Absorption of calcium from food by the intestines, and Conservation of calcium by the kidneys.Renal calculi are strong masses of stones deposited in the kidneys or urinary bladder.
When there is excess calcium in the blood due to hyperparathyroidism, the kidneys would be over burdened with the excretion of excess calcium.
That extra calcium in the kidney & the urine leads to kidney stone development ( renal calculi).
Therefore, patients with hyperparathyroidism would be at risk for developing renal calculi because of high calcium levels excreted by the kidney.
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I NEED THE ANSWER ASAP! Its science btw
Which statement describes conditions in which a mineral can form?
A. Crystals of minerals dissolve in the groundwater in caves.
B. Materials dissolved in seawater crystallize on an ocean bottom.
C. Molten materials are cooled in a netalworks factory
D. Materials are mined from deposits deep underground.
Answer:
b
Explanation:
What is carbon? What does it do?
Will the things dissolve by themselves over time?
When a substance dissolves, it looks like it disappears. But in fact it has just mixed with the water to make a transparent (see-through) liquid called a solution. A solution has two parts. The solute is the solid that gets dissolved.
Answer:
it really depends what they are
Explanation:
Explain how magnesium is produced at the negative electrode from molten magnesium chloride
Answer:
being cation it migerates to cathode to be reduced to elemental magnesium
Explanation:
Mg+2. +2e -----------Mg
TRUE or FALSE the term “anti-inflammatory” likely means “against inflammation”
Answer:
True
ANTI MEANS AGAINST
Explanation:
How many dozens of silver atoms are in the piece of jewelry?.
1. Which of the following statements pertaining to the ionic solids represented below are true?
(0)
1.
Both structure are ductile.
II. Structure (1) has a higher melting point than structure (ii)
III. Both structures conduct electricity in the solid state.
IV. Both structures conduct electricity in the liquid state.
Answer:
B
Explanation:
so A is nosense C and D the question is saying the stament for a being repersentation of solid not whether eletric or not
Which polymer structure should be used if a strong and heat - resistant adhesive is required?
1. Linear
2. Branched
3. Networked
4 . Cross - linked
Cross-linked polymers are strong and heat - resistant hence they can be used for this purpose.
A polymer is obtained by the combination of small molecules called monomers. A polymer consists of a regular repeating unit of small molecules called monomers.
A cross-linked polymer is a polymer in which covalent bonds are used to join polymer chains together. Cross-linked polymers are strong and heat - resistant hence they can be used for this purpose.
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1. (8.5d) A compound has a formula Mg:(PO.). Which best describes the atoms that make up this compound?
A.
B.
Atom
Magnesium (Mg)
phosphorus (0)
Oxygen (0)
Number
2
1
4
Atom
Magnesium (Mg)
Phosphorus (P)
Oxygen (0)
Number
6
2
8
C.
Atom
Magnesium (M)
Phosphorus (2)
Oxygen (0)
Number
3
4
2
D.
Atom
Magnesium (Mg)
Phosphorus (P)
Oxygen (0)
Number
3
2
8
Answer:(8.5d) A compound has a formula Mg:(PO.). Which best describes the atoms that make up this compound? A. B. Atom Magnesium (Mg) phosphorus (0) Oxygen (0)
Explanation:
What is q in chemistry.
Answer:
The reaction quotient!
Explanation:
hope this helped :D
How to calculate work done with change in volume and pressure.
[tex]W = \displaystyle \int dW = \displaystyle \int^{V_2}_{V_1} p ~dV = p(V_2 - V_1) = p \Delta V[/tex]
what word describes when tiny droplets of one liquid are finely dispersed within another liquid?
When tiny droplets of one liquid are finely dispersed within another liquid it is called emulsion.
Emulsion can be defined as the process by which two liquids that are not miscible come together to form a mixture.
The emulsion mixture usually consists of an oil phase and a water phase.
The oil phase appears as droplets when dispersed (mixed with) the water phase.
The uses of emulsion include:
It is used in chemical industries for production.It is used for production of medicine.Digestion of fatty food components in the intestine takes place through the process of emulsion.Learn more here:
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An electrochemical cell operates because the electrodes in the two half-cells differ in their electrical potential. A metal electrode composed of ______ reducing agent will have a greater electrical potential to push electrons toward the electrode composed of a ______ reducing agent.
A metal electrode composed of strong reducing agent will have a greater
electrical potential to push electrons toward the electrode composed of a
weak reducing agent.
Strong reducing agents are compounds which donates or loses electrons
with a corresponding increase in the oxidation state. Weak reducing agents
can also be referred to as oxidizing agents and they accept the electrons
from the strong reducing agents which results in a reduction in the oxidation
state.
The strong reducing agent has a greater electric potential which aids the
electrons being pushed towards the electrodes with a weak reducing agent.
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What is an ionic bond.
Answer:
ionic bond is the type of bond formed from electrostatic attraction between oppositely charged ion in a chemical compound
What is the meaning of term Amino acid
Answer:
Amino acids are molecules that combine to form proteins.
Explanation:
Amino acids are molecules that combine to form proteins. Amino acids and proteins are the building blocks of life. When proteins are digested or broken down, amino acids are left. The human body uses amino acids to make proteins to help the body: ... Repair body tissue.
Hope this helps :)
Why do elements in the same group have similar physical and chemical properties
Answer:
Each element within a group has similar physical or chemical properties because of its atom's outermost electron shell (most chemical properties are dominated by the orbital location of the outermost electron).
Explanation:
How often a wave occurs is the wave’s
A. crest.
B. frequency.
C. wavelength.
D. amplitude
Frequency – The frequency of a wave is the number of waves that pass a given point in a certain amount of time. Frequency is measured in units called hertz (Hz), and is defined as the number of waves per second. A wave that occurs every second has a frequency of 1 wave per second (1/s) or 1 Hz.
Answer please
.............................................................
This is not exactly a answer you can use but this is some information that you can use to find out the answer.
You can usually confirm the charge associate degree particle unremarkably has by the element's position on the periodic table: The alkali metals (the IA elements) lose one negatron to create a ion with a 1+ charge. The alkaline-earth metal metals (IIA elements) lose 2 electrons to create a 2+ ion.
Nonmetals type negative ions (anions). A range 7|chemical element|element|gas} atom should gain 3 electrons to possess an equivalent number of electrons as AN atom of the subsequent gas, neon. Thus, a gas atom can type AN ion with 3 additional electrons than protons and a charge of 3−.
mr. garcia uses magnets to hold a poster on a steel filing cabinet because a main component of steel is iron. carbon. plastic. glass.
Mr. garcia uses magnets to hold a poster on a steel filing cabinet because a main component of steel is iron.
What is iron?The chemical element iron has the atomic number 26 and the symbol Fe. It is a metal that is found in group 8 of a periodic table and the first transition series. It makes up a large portion of the planet's outer or inner core and is the most prevalent element on Earth by mass, just ahead of oxygen.
It is the fourth most prevalent element in the crust of the Earth, having been mostly deposited by meteorites inside its metallic state, along with its ores. Iron ores must be processed in kilns or furnaces that may reach 5000 °C (2,730 °F) and higher, which is approximately 500 °C (932 °F) greater than the temperature needed to smelt copper. Mr. garcia uses magnets to hold a poster on a steel filing cabinet because a main component of steel is iron.
Therefore, mr. garcia uses magnets to hold a poster on a steel filing cabinet because a main component of steel is iron.
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0.0200 moles of a compound is found to have a mass of 1.64 g. Find the formula mass of the compound
Give your answers to 3 significant figures
Answer: 82.0 g/mole
Explanation:
Use the units to see that if we divide 1.64 grams by 0.0200 moles, we'll get a number that is grams/mole, the definition of formula mass.
1.64/0.0200 = 82.0 g/mole (3 sig figs)
We can't tell from this alone what the molecular formula might be, but C6H10 (cyclohexene) comes close (82.1 grams/mole).
The formula mass of the compound will be approximately 82.0 g/mol
The formula mass of the compound is the sum of atomic masses of all the atoms in its chemical formula. It is calculated by adding up the atomic masses of the individual elements in the compound, each multiplied by the subscript indicating the number of atoms of that element in the formula.
To find the formula mass of the compound, we'll use the relationship between moles, mass, and molar mass.
Molar mass (in g/mol) = Mass (in g)/Moles
Given:
Mass = 1.64 g
Moles = 0.0200 moles
Let's plug the values and calculate molar mass:
Molar mass = 1.64 g / 0.0200 moles
Molar mass ≈ 82.0 g/mol
The formula mass of the compound is approximately 82.0 g/mol, rounded to three significant figures.
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Please help! Giving 20 points!
Question: How can NASA scientists use Newton's third law of motion to plan for a space vehicle landing on a meteor? Make a claim. Support your claim with evidence from the article. Then, explain why the evidence supports your claim.
Article: https://newsela.com/read/lib-newton-third-law/id/54749/
Answer:
Explanation:
NASA uses rockets to launch astronauts and supplies to the International Space Station. Launching a rocket relies on Newton's Third Law of Motion. A rocket engine produces thrust through action and reaction. The engine produces hot exhaust gases which flow out of the back of the engine
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