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OlgaM077 [116]
3 years ago
9

Which of the following tables correctly identifies each change as chemical or physical?

Chemistry
1 answer:
Anna [14]3 years ago
5 0

Answer:

A is the answer

Explanation:

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If there are 3.10 moles of O, how many moles of each of the compounds are present?
Burka [1]

Explanation:

The question pretty  much requires us to find the amount of moles of each compounds based on the number of moles of O given.

H2SO4

1 mol of H2SO4 contains 4 mol of O

x mol of H2SO4 would contain 3.10 mol of O

x = 3.10 * 1 / 4 = 0.775 mol of H2SO4

C2H4O2

1 mol of C2H4O2 contains 2 mol of O

x mol of C2H4O2 would contain 3.10 mol of O

x = 3.10 * 1 / 2 = 1.55 mol of C2H4O2

NaOH

1 mol of NaOH contains 1 mol of O

x mol of NaOH would contain 3.10 mol of O

x = 3.10 * 1 / 1 = 3.10 mol of NaOH

3 0
3 years ago
calculate the amount of current that must flow for 50 minutes to a solution of silver trioxonitrate (V) solution to deposit 2 mo
mamaluj [8]

Explanation:

i found this the question is different but I think the situation is same

5 0
3 years ago
When an ice cube melts in your hand, it changes from a solid to a liquid.
djverab [1.8K]

Answer:

B. exothermic; leaving

Explanation:

The exothermic process releases heat, which causes the surrounding area to increase in temperature.

Your hand is releasing heat and makes the temperature of the ice cube increase, to where it melts.

4 0
2 years ago
A double replacement reaction is a reaction in which one element replaces a similar element within a compound.
ladessa [460]
False. What you’re describing is a displacement reaction.
6 0
3 years ago
Read 2 more answers
How does an exothermic change show that a chemical reaction occured?
Gre4nikov [31]
With increasing temperature of the chemical reaction
8 0
3 years ago
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