Complete this sentence. If mass remains the same while the volume of a substance ________, the density of the substance will_______________.
(NOT GIVING BRAINLIEST, JUST ANSWERING A QUESTION MOST PEOPLE GOT WRONG ON)
A. decreases, decrease
B. increases, decrease
C. increases, stay the same
D. decreases, stay the same
**It's D**

Answer:

PCl₅ = 208.22g/mol. UF₆ = 352.03g/mol.

Explanation:

Find the atomic mass of each element–and if there's a subscript (you multiply the atomic mass by that much). P= 30.97g, Cl= 35.45g; 30.97+35.45(5) = 208.22g [same idea with UF₆]

Explanation:

hope it helpful ✌️✌️

Answer:

I'm thinking it might be Element 39: Yttrium, as this is Chemistry.

Explanation:

Answer:

Osmosis

Explanation:

Water is very essential for the body. When we drink water, our blood cells absorbs water from the body. This happen by a process called as osmosis process. Osmosis is type of diffusion process.

Water along with oxygen and carbon dioxide are some of the simple molecules that moves into the blood cell. Osmosis is the process by which water molecules passes into the cell bodies through its semi permeable membrane.    

Volume of Ammonia(NH₃) = 22.4 L

Given

Reaction

3CuO+2NH₃⇒ 3Cu + 3H₂O+ N₂

In the problem, the CuO coefficient should be 3 not 2

M CuO = 80

mass CuO = 120 g

Required

The volume of NH₃

Solution

mol CuO :

[tex]\tt mol=\dfrac{mass}{M}\\\\mol=\frac{120}{80}\\\\mol=1.5[/tex]

From the equation, mol ratio CuO : NH₃ = 3 : 2, so mol NH₃=

[tex]\tt \dfrac{2}{3}\times 1.5=1~mol[/tex]

Assume at STP(0 °C, 1 atm) ⇒1 mol = 22.4 L, then volume of NH₃=22.4 L

Answer:

A. the valence electrons

Explanation:

Answer:

The valence electrons

Explanation:

The valence electrons determine an element's properties because chemical properties of each element are determined by the element's electronic configuration and PARTICULARLY by its outermost valence electrons. I hope it helps!

                      ~Good luck

Answer:

option 1. Two substances in a mixture differ in density and particle size. These properties can be used to separate the substances. These properties can be manipulated in order to have a better separation between the two substances.

Explanation:

Answer:

Two substances in a mixture differ in density and particle size. These properties can be used to separate both of them using the separating funnel or using filtration (filter paper).

Explanation:

Since their densities are different, one substance should float above the other in the mixture which allows for the separating funnel to let the substance sinking below (with the heavier density) to flow out first before changing the beaker to let the lighter substance flow out.

The substance with a bigger particle size would not be able to pass through the filter paper unlike the substance with the smaller particle size as the filter paper's pores is not big enough for it to pass through, separating both substances (with one on the paper and the other outside the filter paper, preferably in the beaker placed below the paper).

Answer:

if you add a neutron to lithium-7 it becomes a compound nucleus of lithium-8

Answer:

The Outer-most Electron shell contains the valence electrons.

Bonus Info:

Valence Electrons are used by atoms to make ionic bonds.

Answer:

Valence electrons are the electrons in the outermost shell, or energy level, of an atom. For example, oxygen has six valence electrons, two in the 2s subshell and four in the 2p subshell. We can write the configuration of oxygen's valence electrons as 2s²2p⁴.

Explanation:

ur welcome

i was doing this in school and i watched a video

Answer:

A - dendrites

B - cell body

C - axon terminal

D - myelin sheath

E - nucleus

Hope that helps.

A-dendrite

B-cell body

C-axon terminal

D-axon

E-nucleus

Answer:

51.79g Li₃P.

Explanation:

Li has a molar mass of 6.94 g (since there are 3, you multiply it 3 times) and P has a molar mass of 30.97 g. 6.94(3) + 30.97 = 51.79g.

Answer:

the noble gases

Answer:￣ﾉﾞ(｡･∀･)ﾉﾞo(*￣▽￣*)ブ(*￣3￣)╭o(*￣▽￣*)ブ(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭•)>⌐)↖↗↘↙↜↚↯↟↝↖↔↕↙↘↙↘↘↞↴↯↚↨⇌⇋⇆⇉⇑↶⇋⇋↳¾⁷¼¼⁶⁴⁷⁰⁰⁰⁹⅕⅘⅓⅕⅓⅕⨊⨡⨔⨩⨦⨶⨼⨿⨷⨷⨻⨼⨹₴ The answer is resperitory

Explanation:

Isotopes are atoms of the same element that have different numbers of neutrons. Protons are positively-charged particles found in the nucleus of an atom.

Electrons are negatively-charged particles found in the outer shell of an atom. The charge on an element is determined by the number of protons and electrons present in the atom.

a.) Li+:  number of protons = 3

Number of electrons = 2

charge of Li+ = +1

b.) Be2+: number of protons = 4

Number of electrons = 2

charge of Be2+ = 2+

c.) C4+: number of protons = 8

Number of electrons = 4

charge of C4+ = 4+

d.) O2-: number of protons = 8

Number of electrons = 10

charge of O2- = -2

e.) N3-: number of protons = 7

Number of electrons = 10

charge of N3- = -3

f.) C4- : number of protons = 4

Number of electrons = 4

charge of C4- = -4

g.) 14C6: The mass number = 14

Atomic number = 6

Number of neutrons = 8

h.) 18O8:  The mass number = 18

Atomic number = 8

Number of neutrons = 10

i.) 19F9:  The mass number = 19

Atomic number = 9

Number of neutrons = 10

j.) 40Ca20:  The mass number =40

Atomic number = 20

Number of neutrons = 20

k.) 37Cl17:  The mass number = 37

Atomic number = 17

Number of neutrons = 20

l.) 238U92:  The mass number = 238

Atomic number = 92

Number of neutrons = 146

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Explanation:

Weathering occurs one of three ways: through physical processes such as freezing and thawing, because of live organisms whose roots break rocks or through chemical processes that occur when carbon dioxide in the soil and air and mixes with water and specific minerals in rocks to form a weak acid that reduces rocks into silt, soil and sediment.

Chemical weathering typically increases as temperatures rise and rain falls, which means rocks in hot and wet climates experience faster rates of chemical weathering than do rocks in cold, dry climates.

Answer:

O, Ca, Zn, Br

Sc, K, Br,

Explanation:

The correct order of the chemical elements from highest to lowest electronegativity is: C. Br, Zn, Sc, Ca, K.

Electronegativity refers to a measure of the ability of an atom of a chemical element to attract any shared pair of electrons.

Generally, the electronegativity of a chemical element typically increases across the period from left to right.

In Chemistry, the electronegativity of some of the chemical element are:

Hence, the order of the chemical elements from highest to lowest electronegativity is:

1. Bromine (Br) = 2.96

2. Zinc (Zn) = 1.65

3. Scandium (Sc) = 1.36

4. Calcium (Ca) = 1.0

5. Potassium (k) = 0.82

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Answer:

a

Explanation:

Chemical then thermal because the carbon emissions produce heat

Then kinetic because there is energy transfer then electric because that's the finished result

Answer:

A. Al(s)

Explanation:

Explanation:

Agl+hih+356bnh$&56DG hug zero cg hydh hod sir un bucks

Answer:

C5H12.

Explanation:

The compound will be C5H12.

Now consider the general formula for the combustion of an alkane;

CnH2n+2 + 3n+1/2O2-----> nCO2 + (n+1) H2O

If we substitute n=5, we have;

C5H12 + 8O2-----> 5CO2 + 6H2O

Hence the answer above.

Answer:

1 mole of Na = mass of 22.99 g, 1 mole of Si = mass of 28.09 g.

Answer:

This molecule is AgN3

Explanation:

Answer:

AgN3

Explanation:

Mass of nitrogen N is given as 24.36 g

Molar mass of nitrogen N= 14 g/mol.

amount of substance in mol of N = mass/molar mass

=24.36 g/ 14 g/mol.

=1.74 mol.

Given mass of silver= 62,64 g.

Molar mass of silver Ag=107.87 g/mol

Number of mols=62.64 g ÷ 107.87 g/mol.

=0.58 mol.

Ratio of number of mol of N and number of mols of Ag = 1.74 mol / 0.58 mol

=3:1

Hence, empirical formula is AgN₃.

Answer:

about 16

Explanation:

its 20 - ( approximately 5)

= approximately 16

Answer:

It should be (C) about 12cm

Answer:

C4H8O4

Explanation:

Let (CH20)x

C=1*12.01=12.01     (12.01, 1.01, 16.00 Avg mass of elements)

H=2*1.01=2.01

O=1*16.00=16.00

12.01 + 2.01 + 16.00 = 30.03

120.12/30,03=4

==> (CH2O)4 = C4H8O4

The molecular formula of the molecule that has an empirical formula of [tex]CH_2O[/tex] is equal to [tex]C_4H_8O_4[/tex].

Given the following data:

Scientific data:

To determine the molecular formula of the molecule that has an empirical formula of [tex]CH_2O[/tex]:

First of all, we would find the molar mass of [tex]CH_2O[/tex]:

[tex]CH_2O =12 +(1\times2)+16\\\\CH_2O =30\;g/mol[/tex]

For molecular formula:

[tex](CH_2O)n = 120.12\\\\30n = 120.12\\\\n=\frac{120.12}{30}[/tex]

n = 4.0

[tex](CH_2O)_4 = C_4H_8O_4[/tex]

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Answer:

The light microscope bends a beam of light at the specimen using a series of lenses to provide a clear image of the specimen to the observer.

Explanation:

Methane is a gas at room temperature but methanol is a liquid because in methane there's London dispersion intermolecular force but in methanol there's H-bond and London dispersion force. H-bond is more stronger than London dispersion force. So, it increases the boiling point of methanol that's why methane is gas at room temperature due to weak attraction of London dispersion force and methanol is liquid.

Methanol has a higher boiling point than methane due to stronger intermolecular forces (IMFs), or attraction between individual molecules. This makes its molecules more difficult to separate, requiring more energy and resulting in a higher boiling point.

An intermolecular force is a force that mediates the interaction of molecules, including electromagnetic forces of attraction or repulsion that act between atoms and other types of neighboring particles, such as atoms or ions.

Intermolecular forces are classified into five types namely,

Between ions and polar dipole molecules, ion-dipole forces exist.

Since of stronger intermolecular forces (IMFs), or attraction between individual molecules, methanol has a higher boiling point than methane.

This makes it more difficult to separate its molecules, requiring more energy and resulting in a higher boiling point.

Thus, this is the reason of using types of intermolecular forces present.

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Answer:

The pointer pointing to the grey and white balls are either proton or nuetron i van't really tell cause their grey and white.

The whole clster of balls is the Nucleus

The black balls on the lines are electrons

And the lines are the energy level

Explanation: