Answer:
mass= 206.4 g
Explanation:
Density= mass/volume
0.86=x/240
x=240×0.86
=206.4g
The density of butter is 0.86 g/cm³. 206.4g is the mass of 240 cm³ of butter. The phrase "specific volume" is occasionally used in thermodynamics to refer to a substance's reciprocal of its density.
Density, mass of a unit volume of a material substance. The formula for density is d = M/V, where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimetre. For example, the density of water is 1 gram per cubic centimetre, and Earth’s density is 5.51 grams per cubic centimetre. Density can also be expressed as kilograms per cubic metre (in metre-kilogram-second or SI units). For example, the density of air is 1.2 kilograms per cubic metre.
Density= mass/volume
0.86=x/240
x=240×0.86
=206.4g
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19 – (-11) =
Express your answer as an integer.
Answer:
30
Explanation:
use the keep,change,change method.
19 + 11
19,keep, "-" change to addition, -11,change to positive
now use this
19 + 11 = (30 )
The kinetic energy within molecules of an object _____ when heat is added.
Answer:
As an object is heated up, its atoms and molecules move and collide faster. Geothermal energy is the thermal energy in the earth. Wind. ... total kinetic energy of the particles hat make up a substance. please mark brainliest
Explanation:
Answer: As an object is heated up, its atoms and molecules move and collide faster.
Explanation: Geothermal energy is the thermal energy in the earth. Wind. The total kinetic energy of the particles that make up a substance. Thus when the heat is added to the system, the temperature gets increases which in turn will increase the velocity of the molecule and these molecules will collide even faster .
Properties of nonmetals include
a.high boiling point.
b.ability to conduct heat.
c.dull appearance.
d.none of the above
Answer:
c.dull appearance
Explanation:
Nonmetals are dull,poor conductors of heat and electricity that have lower melting points than metals,the rest of the answer choice are properties of metal.
Hope this helps :)
In your own words, explain in a simple, short way of what the periodic table is.
Answer:
The periodic table is a chart that arranges all of the chemical elements.The chemical elements are the substances that make up all matter. The amount of tiny particles in each element is the atomic number, which is how you identify it.
Explanation:
What can you say about the reactants of photosynthesis and the products of cellular respiration?
Answer:
Photosynthesis converts carbon dioxide and water into oxygen and glucose. Glucose is used as food by the plant and oxygen is a by-product. Cellular respiration converts oxygen and glucose into water and carbon dioxide. Water and carbon dioxide are by-products and ATP is energy that is transformed from the process.
Explanation:
In one to two sentences, describe the process by which the ionic compound, Licl, would dissolve in the polar solvent, CH3COCH3
LICL as an Ionic compounds has covalent ability and they are soluble in polar solvent such as CH3COCH3 but they are insoluble in non-polar solvents. Due to their polarity, CH3COCH3 will decreases the electrostatic forces of attraction thereby resulting in free ions in aqueous solution.
Water is the known as a polar solvent that can dissolve an ionic compounds very easy and as a polar solvent, the arrangement of oxygen and hydrogen atoms in water is in bent shape.
Ionic compounds like LICL that is very polar is soluble in the polar solvent water.
Polar solvents like CH3COCH3 will dissolve polar and ionic solutes because of the attraction of the opposite charges on the solvent and solute particles.
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How do ionic bonds form?
Quick
Answer:
Explanation: ionic bond, also called electrovalent bond, type of linkage formed from the electrostatic attraction between oppositely charged ions in a chemical compound. Such a bond forms when the valence (outermost) electrons of one atom are transferred permanently to another atom.
superscript Coefficient
Me think
Lead-208 is a radioactive isotope. Explain what makes the nucleus of Lead-208 so unstable
a. Show Lead-208 undergo alpha decay, THEN the product undergoes beta decay, Determine the final product
Please Help, Thnx
Answer:
See Explanation
Explanation:
Alpha Decay is the emission of helium nuclei (₂He⁴). That is, two protons and two neutrons are emitted. By formula equation ...
₈₂Pb²⁰⁸ => ₈₀Hg²⁰⁴ + ₂He⁴ => ₈₀Hg²⁰⁴ + (₂α⁴)⁺²
Note the sum of superscripts & subscripts of reactants (₈₂Pb²⁰⁸) must equal sum of superscripts & subscripts of products (₈₀Hg²⁰⁴ + ₂He⁴); that is ...
∑mass reactants = ∑mass products => 208 = 204 + 4
∑atomic no. reactants = ∑atomic no. products => 82 (Pb) = 80 (Hg) + 2 (α⁺²)
Hope this helps. Doc :-)
The number of ions in 17.1 gm of aluminum sulphate Al2 (SO4)3 =….. [Molar mass of Al2 (SO4)3 = 342 gm]
Answer:
1.51 X 10^23 ions
Explanation:
The number of ions in 17.1 gm of aluminum sulphate Al2 (SO4)3 =….. [Molar mass of Al2 (SO4)3 = 342 gm]
in one molecule of Al2(SO4)3 there are 5 ions 2 aluminum and 3 sulfate ions
in 2 molecules there are 2X5= 10 ions
in 10 molecules there are 10X5 = 50 ions
molar mass of Al2(SO4)3 = (2 X 26.98) +( 3 X 32.1) + (3 X 4 X 16.0 ) =342.gms = 17.1/342 =0.0500 moles
1 mole =6.02 X 10^23 molecules ( see Avogadros number)
0.0500 moles = 0.0500 X 6.02 X 10^23 molecules =
0.301 X 10^23 molecules = 3.01 X 10^22 molecules
We determined that each molecule of Al2(SO4)3 has 5 ions
so 3.01 X10^22 molecules have 5 X 3.01 X 10^22 ions =
15.05 X 10^22 ions = 1.51 X 10^23 ions
How does a chemical reaction change one substance into another?
Answer:
Explanation:
By rearrangement of atoms of reactants. The entire properties will also different from the reactants as the composition changes.
11Which type of bond is made when two atoms share one pair of electrons
Answer:
A covalent bond consists of the mutual sharing of one or more pairs of electrons between two atoms. These electrons are simultaneously attracted by the two atomic nuclei. A covalent bond forms when the difference between the electronegativities of two atoms is too small for an electron transfer to occur to form ions.
Rheumatoid arthritis is a disorder in which the joints swell and cause pain. Rheumatoid arthritis causes the body’s own immune cells to attack the membrane of the joints. Which body system does rheumatoid arthritis affect?
Answer:
Immune system
Explanation:
Rheumatoid arthritis is an autoimmune disease. Normally, your immune system helps protect your body from infection and disease. In rheumatoid arthritis, your immune system attacks healthy tissue in your joints. It can also cause medical problems with your heart, lungs, nerves, eyes and skin.
wht will react with acid to giv bluish green salt nd water ??
Explanation:
When dilute HCl is added to a small amount of copper oxide in a beaker, a greenish-yellow gas is released and a bluish-green solution is formed. Since the metal oxides such as a Copper oxide (CuO) are basic in nature, it reacts with acids such as HCl to form the corresponding salt and water.
Hund's rule: states that electrons always enter an empty orbital before they pair up.
Answer:
true
Explanation:
When refering to a gas, the higher the temperature, the faster the particles move:
True
False
Answer:
TrueExplanation:
In Gas,The movement of particles depends upon their temperature. When, the temperature is high the movement of the particles is faster.When, the temperature is low the movement of the particles is slower down and move close together.Hence,
The above statement is true for, the gas particles moves faster in high temperature.
Why is it possible to collect hydrogen gas over water?
What was the flaw in reasoning that caused Mendeleev to mix up the placement of Ar and K, Co and Ni, and Te and Ni?
Answer:
Can you explain your question I don't understand
Can somebody help me with this please?
Answer:
So what you want to do is to place sulfur on top with the two fluorine's on the bottom left and right hand side at slight angles. You don't want to make it look interconnected as one whole bond. Draw a single line from each "F" to the "S" to model two fluorine atoms bond to one sulfur atom (Single bond, only one electron is being shared between each).
NEEEEEDD HELP!CHEMISTRY
1. H2O
EXPLANATIONA water molecule consists of two atoms of hydrogen linked by covalent bonds to the same atom of oxygen. Atoms of oxygen are electronegative and attract the shared electrons in their covalent bonds
ADDITIONAL INFORMATIONHow to differentiate between ionic and covalent bonds ?
There is a couple different ways to determine if a bond is ionic or covalent. By definition, an ionic bond is between a metal and a nonmetal, and a covalent bond is between 2 nonmetals. So you usually just look at the periodic table and determine whether your compound is made of a metal/nonmetal or is just 2 nonmetals.
When an organism dies it is exposed to many different types of biotic and abiotic factors biotic factors include?
Answer:
the organisms themselves,other organisms,interactions between living organisms, and even their waste.
in your own words how do plants on Earth affect the amount of carbon in Earth’s atmosphere?
Answer:
Plants take carbon dioxide out of the atmosphere, but they also have other effects, such as changing the amount of evaporation from the land surface. ... The plants absorb carbon dioxide for photosynthesis through the same pores (called stomata). But when carbon dioxide levels are high, the leaf pores shrink.
Explanation:
What is a force that opposes motion through direct contact?
Friction
Pull
Push
Resistance
Answer: friction
Explanation: The force that resists the sliding or rolling of one solid object over another, also, the force that resists relative motion between two bodies in contact
In 1860, Chemists could make which of the following statements about the known chemical elements?
a. They all had identical properties.
b. Some had similar properties.
c. They all had different properties.
d. They could not be grouped.
Answer:
b. Some had similar properties
as soda gets warm, it goes flat. why? relate this to solubility.
Answer:
It's because the solubility of gases in water is inversely proportional to the temperature, so it means when the temperature is increased, the solubility decreases, and the gases tend to get out from the soda
Two particles with the same charger will always____each other when brought close together
What is the process of copying a DNA molecule to make another DNA molecule?
I WILL GIVE YOU BRAINLIEST PLEASE ANSWER ASAP NEED HELP!!!!!!!
I WILL GIVE YOU BRAINLIEST PLEASE ANSWER ASAP NEED HELP!!!!!!!
I WILL GIVE YOU BRAINLIEST PLEASE ANSWER ASAP NEED HELP!!!!!!!
what are the oxidation numbers for manganese and nitrogen in Mn3N4
Explanation:
I think
maganese is +7 and Nitrogen is +5
sorry if I am incorrect I haven't done chemistry in a year
btw for chemistry if you need help with equations I used this equation balancer called chemical aid it helps
In Mn3N4, the compound consists of three manganese (Mn) atoms and four nitrogen (N) atoms.
To determine the oxidation numbers, we can assign x as the oxidation number for manganese and y as the oxidation number for nitrogen.
Since the compound is neutral overall, the sum of the oxidation numbers must equal zero.
For the three manganese atoms:
3x = 0
x = 0
For the four nitrogen atoms:
4y = 0
y = 0
Therefore, the oxidation numbers for manganese (Mn) and nitrogen (N) in Mn3N4 are both 0.
Whymilk is taken as mixture
Explanation:
Main compounds of milk are lactose and casein. And it is also called a colloidal mixture (i.e. in which one substance of microscopically dispersed insoluble or soluble particles is suspended throughout another substance). Therefore milk is regarded as a mixture not as a pure substance. So this is the required answer.
what is a good use of 385 protocol in English
Answer:
375
Explanation:
1. The electron configuration below represents the ground state of an atom.
2-8-6
This element is found in the Periodic Table in-
Answer:
[tex] {S}^{16} [/tex]
group 16 period 2 of the periodic table
note: that is not the electronic configuration, that is the Bohr model.
There are various kind of elements that are present in periodic table. Some elements are harmful, some are radioactive, some are noble gases. Sulfur is the correct answer for our given question
What is periodic table?
Periodic table is a table in which we find elements with properties like metals, non metals, metalloids and radioactive element arranges in increasing atomic number.
We can find any element in periodic table if its electronic configuration is given. From electronic configuration, we can find the group number and the period number. So, according to our question the configuration is 2,8,6. Form here we can say that atomic number of element is 16 and the valence electron is 6 so the only group in the periodic table that has valence electron 6 is the group 16 that is oxygen family.
Therefore Element is sulfur and is found in group 16 and period 2
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