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Inga [223]
3 years ago
15

WILL GIVE BRANLIEST!! EASY BUT I WAS TO LAZY TO LEARN!! WILL FOREVER BE GREATFUL!!! WILL GIVE BRANLIEST!! EASY BUT I WAS TO LAZY

TO LEARN!! WILL FOREVER BE GREATFUL!!!
WILL GIVE BRANLIEST!! EASY BUT I WAS TO LAZY TO LEARN!! WILL FOREVER BE GREATFUL!!!

5. What type of reaction would the heat calculation in previous question be classified as?

A) Natural

B) Chemical

C) Endothermic

D) Exothermic

7. What causes the volume to change in gases? (Choose all that apply)

A) Density

B) Temperature

C) Shape of container

D) Pressure
Chemistry
1 answer:
notsponge [240]3 years ago
7 0

Answer:

for the first one we need the previous question to be able to answer it. for the second one density and temperature

Explanation:

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WILL GIVE 50 POINTS FOR ALL ANSWERS!!! PLEASE HELP!
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Read 2 more answers
What is the mass, in grams, of 2.50 * 10-3 mol of aluminum sulfate?
Nonamiya [84]

Answer:

The mass is 0.855 grams (option A)

Explanation:

Step 1: Data given

aluminium sulfate = Al2(SO4)3

Numer of moles Al2(SO4)3 = 2.50 * 10^-3 moles

atomic mass Al = 26.99 g/mol

atomic mass S = 32.065 g/mol

Atomic mass O = 16 g/mol

Step 2: Calculate molar mass Al2(SO4)3

Molar mass = 2* 26.99 + 3*32.065 + 12*16

Molar mas = 342.175 g/mol

Step 3: Calculate mass Al2(SO4)3

Mass Al2(SO4)3 = moles Al2(SO4)3 * molar mass Al2(SO4)3

Mass Al2(SO4)3 = 2.5 *10^-3 moles * 342.175 g/mol

Mass Al2(SO4)3 = 0.855 grams

The mass is 0.855 grams (option A)

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