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2 years ago

PLEASE HELP!!!

Chemistry

2 answers:

umka21 [38]2 years ago

7 0

Answer:

the answer is A

Explanation:

physical changes does not change the property of matter.

Serhud [2]2 years ago

5 0

Answer: A

Explanation:

A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance.

According to this statement the option A that is, melting point is a physical property of matter because when a substance melts, it changes from a solid to a liquid but it still the same substance explains a specific character of a physical property

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What are a physical properties?

pychu [463]

Physical properties include: appearance, texture, color, boiling point, melting point, ect.

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3 years ago

Which type of particles have no definate shape, but they do have a definite volume?

Anna35 [415]

Liquid, liquids have a definite volume but can take the shape of whatever container holds them.

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3 years ago

The half-life of U234 is 25200 years. How much of a 100 gram sample remains after 352800 years?

lord [1]

The answer is um hold on need a dictionary lol jk but i will be right back to help you

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3 years ago

N and ca can mix with each othe to make compound-explain

postnew [5]

Answer:

Yes, the formed product is calcium nitride, $Ca_3N_2$ .

Explanation:

Hello,

In this case, the answer is yes, since nitrogen in gaseous state is able to react with calcium in solid state to form calcium nitride as shown below:

$N_2+Ca\rightarrow Ca_3N_2$

This is possible since calcium losses two electrons and nitrogen gains three electrons to remain positively and negatively charged respectively, forming the aforementioned ionic compound.

Best regards.

7 0

3 years ago

Please help!!<br> If u know any please tell!?

ivolga24 [154]

Answer: 176 g N2O, 72 g H2O

Explanation:

1. 64g O2 * (1 mol O2)/(32 g O2) * (2 mol N2O)/(1 mol O2) * (44g N2O)/(1 mol N2O) = 176 g N2O

2. 32g CH4 * ( 1 mol CH4)/(16 g CH4) * (2 mol H2O)/(1 mol CH4) * (18 g H2O)/(1 mol H2O) = 72 g H2O

5 0

3 years ago