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labwork [276]
3 years ago
14

A Variable That Stays The Same In An Experiment Is A ?

Chemistry
1 answer:
hammer [34]3 years ago
3 0
The variable that stays the same in an experiment is called the controlled variable

Hope this helps
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Every element and compound has a unique set of properties. True or False?
velikii [3]

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So the answer to "every element and compound has a unique set of properties. True or False?" is TRUE

Explanation:

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3 years ago
A sample of paraffin wax undergoes the following change: C25H52(s) → C25H52(l)
nalin [4]

Answer:

Explanation:

(a) Answer: Intermolecular forces

The reason for this answer is because the substance (paraffin wax) only changed it's state from solid to liquid and didn't undergo a breakage in it's covalent bond within it's carbon chain which would have produced another substance.

(b) Solid substances are generally more dense than there corresponding liquid substances because the more compact particles are (which occurs in solids), the more dense they become. They are thus more dense than liquids because liquids have there particles loosely packed and well spaced making them less dense than there corresponding solids. Hence, the solid paraffin wax was going to become less dense because it's particles moved from being tightly packed (as solids) to being loosely packed (as liquids). Density refers to mass per volume but can also be described as the level of compactness of a substance. Thus, since liquid is not as compact as solid, it can be said to be less dense than solids.

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3 years ago
1
zzz [600]

Answer:

i think kinetic energy sorry if I'm wrong.

6 0
3 years ago
In the following reaction, how many grams of silver can be produced from 49.1 g copper?
notsponge [240]

166.4 g Ag grams of silver can be produced from 49.1 g of copper.

<h3>What is a mole?</h3>

A mole is a very important unit of measurement that chemists use. A mole of something means you have 602,214,076,000,000,000,000,000 of that thing, like how having a dozen eggs means you have twelve eggs.

1 mol Cu + 2 mol AgNO_3 → 2 mol Ag + 1 mol Cu(NO3)2

63.55 g Cu —> 2 x 107.688 g Ag

63.55 g Cu gives 215.376 g of Ag

So, 49.1 g Cu —> \frac{215.376 g X 49.1 g}{63.55 g}

= 166.4 g Ag

Hence, 166.4 g Ag grams of silver can be produced from 49.1 g of copper.

Learn more about moles here:

brainly.com/question/26416088

#SPJ1

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2 years ago
Asdfjkl;asdfjkl;asdfjkl;asdfjkl;asdfjkl;asdfjkl;asdfjkl;
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Answer: ok ill just take my points in dip

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3 years ago
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