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navik [9.2K]
3 years ago
9

In examples where the volume of a system is under constant pressure, which of

Chemistry
1 answer:
grin007 [14]3 years ago
6 0
Answer:

D


Explanation:


At constant volume, the heat of reaction is equal to the change in the internal energy of the system. ... Most chemical reactions occur at constant pressure, so enthalpy is more often used to measure heats of reaction than internal energy.
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How much is the density of carbon dioxide gas if .392g occupies a volume of 200 ml
Maru [420]
Mass = 0.392 g

Volume = 200 mL

density = mass / volume

d = 0.392 / 200

d = 0.00196 g/mL
3 0
3 years ago
Result in the formation of one or more new substances with new chemical and physical properties
Talja [164]

Answer:

Hi

Explanation:

A change in matter that produces one or more new substances is a chemical change (also called a chemical reaction). Burning and rusting are both examples of chemical changes. products.

5 0
2 years ago
What the other name of atoms?
marysya [2.9K]

Answer:

Similar names of atoms are, particles, molecule, bit. etc............im really sorry imm not quite sure if thats what you needed but i hope it helps in some way :>

Explanation:

6 0
3 years ago
Which is the largest atomic radius
katrin2010 [14]

Answer:

₁₁A

Explanation:

Atomic radius

As we move from left to right across the periodic table the number of valance electrons in an atom increase. The atomic size tend to decrease in same period of periodic table because the electrons are added with in the same shell. When the electron are added, at the same time protons are also added in the nucleus. The positive charge is going to increase and this charge is greater in effect than the charge of electrons.

This effect lead to the greater nuclear attraction. The electrons are pull towards the nucleus and valance shell get closer to the nucleus. As a result of this greater nuclear attraction atomic radius decreases.

So in given elements consider A₁₁, B₁₂, C₁₃ ans D₁₇ as sodium, magnesium, aluminium and chlorine. This is the third period and as we move form sodium to chlorine atomic radius decreases. That's why sodium has greater size.

As we move down the group atomic radii increased with increase of atomic number. The addition of electron in next level cause the atomic radii to increased. The hold of nucleus on valance shell become weaker because of shielding of electrons thus size of atom increased

7 0
3 years ago
Catalysts increase reaction rates by lowering the activation energy of a reaction.
Setler [38]
The answer is true, catalysts increase rates by lowering the activation energy of a reaction. Catalysts lower the reaction energy and so the reaction occurs faster. Enzymes perform the role of biological catalysts. Most metabolic pathways of the body are controlled by enzymes. Enzymes by classification are proteins. <span />
4 0
3 years ago
Read 2 more answers
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