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3 years ago

Help please?? I’m confused

Chemistry

1 answer:

Nady [450]3 years ago

3 0

It’s c. O stands for oxygen and h stands for hydrogen. They both do play in the roll

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Democritus contributed to our understanding of the atom in which of the following ways?

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I believe the answer is 3 - He hypothesized that all substances can be broken down into a smallest part called the atom.

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A science student wants to use distillation to separate a mixture of two

statuscvo [17]

Answer:

Boiling point

Explanation:

Distillation is one of the most widely used separation technique in chemistry. It is used to separate a mixture of liquid substances with different boiling point. Hence, the basis of the separation is BOILING POINT DIFFERENCE.

In the procedure, the liquid substances are heated until they turn gaseous, which they do at different times considering their different boiling points. The separated components are then converted back to liquid states in a process called CONDENSATION.

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How do you draw 5 arrows showing uniformity

makkiz [27]

Answer:

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The specific heat of a given substance

Lelechka [254]

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3 years ago

18. Use the activity series to predict whether the following synthesis reaction will occur. Write the chemical equations for the

MAXImum [283]

<u>Answer:</u> The chemical reaction for the synthesis reaction is given below.

<u>Explanation:</u>

Synthesis reaction is defined as a chemical reaction in which two small chemical substances combine together to form a single compound. The general equation for this chemical reaction follows:

$A+B\rightarrow AB$

For the reaction of calcium and oxygen combining together to form calcium oxide, the equation follows:

$2Ca(s)+O_2(g)\rightarrow 2CaO(s)$

By Stoichiometry,

2 moles of calcium element combines together with 1 mole of oxygen gas to produce 2 moles of calcium oxide.

Hence, the chemical equation for the reaction is given above.

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3 years ago