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Elenna [48]
2 years ago
13

5. The change in direction of light waves when they pass from one material

Chemistry
2 answers:
harina [27]2 years ago
8 0

Answer:

B. refraction

Explanation:

soldi70 [24.7K]2 years ago
6 0

Answer:

b

Explanation:

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35 Given the word equation:
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When the reactant is single compound before the reaction and become more than single compound after reaction is called decomposition reaction
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During an experiment, a scientist places a heat lamp above a bowl of water and uses the lamp to heat up the water. How does heat
dlinn [17]

Answer:

Radiation

Explanation:

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What do chemists use percent yield calculations for in the real world?
STALIN [3.7K]

Answer:

C. To determine how efficient reactions are.

D. To determine how much reactant they need.

Explanation:

When you are doing a reaction, you are hoping for a percent yield to close of 100%. You make the reaction and determine how many product you obtain. If you know the percent yield of a reaction you can calculate the amount of reactant you need to obtain a determined amount of product.

Having this in mind:

A. To balance the reaction equation.  false. To calculate percent yield you need to balance the reaction before. You don't use percent yield to balance the reaction

B. To determine how much product they will need.  false. You determine how much product you obtain after the reaction. How much product you need is independent of percent yield

C. To determine how efficient reactions are.  true. A way to determine efficience of a reaction is with percent yield. An efficient reaction has a high percent yield.

D. To determine how much reactant they need. true. If you know percent yield of a reaction you can know how many reactant you must add to obtain  the amount of product you want.

8 0
2 years ago
When a substance is entering a phase change, the gain or loss of heat is a result of:______.
nydimaria [60]

When a substance is entering a phase change, the gain or loss of heat is a result of energy gained or lost in forming or breaking intermolecular interaction.

The constant temperatures occur when a substance is undergoing a phase transition.  If heat is removed from a substance , such as in freezing and condensation , then the process is exothermic . In this instance , heat is decreasing the speed of the molecules causing then move slower.

Example : liquid to solid and gas to liquid .

These changes release heat to the surrounding.

To learn more about  phase change,

brainly.com/question/12390797

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4 0
1 year ago
Notice that " s o 4 " appears in two different places in this chemical equation. s o 2− 4 is a polyatomic ion called "sulfate."
Amanda [17]
A "3" should but put in front of
<span>"cas o 4 "</span>
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2 years ago
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