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valentinak56 [21]
3 years ago
15

A change of matter is a physical change True or False​

Chemistry
2 answers:
kodGreya [7K]3 years ago
8 0

Answer:

true

Explanation:

hope it helps

MrRissso [65]3 years ago
8 0

Answer:

I'm pretty sure it's true

Explanation:

20 characters

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In the formation of a macromolecule, what type of bond would join two amino acid subunits?
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What is the mass of 4.6 moles of helium gas?
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18.4 g

Explanation:

M(He) = 4.0 g/mol

4.6 mol * 4.0 g/ 1 mol = 18.4 g

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Which property or properties of gases accounts for the observation that cases
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it is II and III

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3 0
3 years ago
What is the value of for this aqueous reaction at 298 k? a b↽−−⇀c dδ°=20. 46 kj/mol
sineoko [7]

The value for this aqueous reaction at 298 k? a b↽−−⇀c dδ°=20. 46 KJ/mol is 9.91 mol. in equilibrium

<h3>What is an aqueous reaction in equilibrium?</h3>

When a chemical reaction happens at the liquid state and the formation of reactant and product is the same then the reaction is known as an aqueous reaction in equilibrium denoted by K.

δG = − R T ln

          R = universal gas constant 8.313

          δG= 20. 46 kj/mol

           T =  298 k or 24.4 in celcius.

substituting the value in the equation.

20. 46 kj/mol = 8.313 × 24.4 in celcius × K

K =  8.313 × 24.4 in celcius / 20. 46 kj/mo

k = 9.91 mol .

Therefore, The value of this aqueous reaction at 298 k? a b↽−−⇀c dδ°=20. 46 KJ/mol is 9.91 mol. in equilibrium

Learn more about the aqueous reaction in  equilibrium, here:

brainly.com/question/8983893

#SPJ4

5 0
2 years ago
A copper cylinder, 12.0 cm in radius, is 44.9 cm long. If the density of copper is 8.90 g/cm^3, calculate the mass in grans of t
zlopas [31]

Answer:

we use: V = pi*(r^2)*h

V = 3.14*(12.0cm^2)*44.0 cm

V = 19895.04 cm^3

Therefore, mass = (8.90g/cm^3) * (19895.04 cm^3) = 177065.856 g

Explanation:

5 0
3 years ago
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