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Chemistry

The definition of chemical is "any substances that has a definite composition." What does "definite composition" mean?

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Chemistry

A student places three ice cubes in a beaker and allows them to partially melt. if she measures the temperature of the water in the beaker, what will she most likely observe? explain your answer.

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Chemistry

What is the metric unit for density

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Chemistry

Is the compound CO ionic or covalent

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Chemistry

What is the volume in ml of one pound of mercury?

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Chemistry

How does the number of molecules in one mole of carbon dioxide compare with the number of molecules in one mole of water?

A. There are four times as many molecules in one mole of carbon dioxide as there are in one mole of water.

B. There are twice as many molecules in one mole of carbon dioxide as there are in one mole of water.

C. There are the same number of molecules in one mole of carbon dioxide as there are in one mole of water.

D. There are three times as many molecules in one mole of carbon dioxide as there are in one mole of water.

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Chemistry

Suppose you had 1.0 mol samples the following gases at STP. If the volume of each of the samples of gas was reduced to one tenth of its original size and the temperature remained the same, which gas would have the lowest pressure?

A) He

B) Kr

C) N2

D) NO

E) O2

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Chemistry

What happens when the silvered coin is put on the flame

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Chemistry

Do simple molecules conduct electricity? and why?

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Chemistry

C) 2,2-dimethyl-3-heptyne

how to draw

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Chemistry

What is the difference between a solute and a solvent?

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Yuliana Vincent

Chemistry

A 100 g sample of an unknown liquid absorbs 2000 j of heat energy, raising the liquid's temperature from 50 ◦ c to 70 ◦

c. what is the specific heat capacity of this liquid? no phase change took place.

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Chemistry

How many moles are present in 1.51 x 10^23 molecules of HCl?

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Cooper Calderon

Chemistry

where do most earthquakes occur? A. within volcanoes where plates interact B. whar plates interact C. whar plates diverge D. at hot spots

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Chemistry

Which question cannot be explained by chemistry?

A. How does yeast make bread dough rise?

B. Why does sugar dissolve faster in hot water?

C. How does a convection oven cook food?

D. Why do peeled apples turn brown in air?

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