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kolbaska11 [484]
3 years ago
14

Controls are defined as____

Chemistry
1 answer:
Alexeev081 [22]3 years ago
5 0
A scientific control is an experiment or observation designed to minimize the effects of variables other than the independent variable.
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What is the correct formula for xenon hexafluoride? XeF XeF6 Xe6F6 Xe6F
Vinil7 [7]
Hexa- means six
"hexa-" and it is in front of the fluoride so that means we have 6 fluorines
Answer:
xenon hexafluoride → XeFl_{6}

Any questions?
3 0
3 years ago
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How is an exothermic reaction identified on a potential energy diagram?
Alla [95]
Energy diagrams are use to depict the energy changes that occur during a chemical reaction. There are two types of reaction based on the energy change, these are exothermic and endothermic reactions. In endothermic reactions energy are gained while in exothermic reactions energy are lost to the environment. To identify an exothermic reaction on a potential energy diagram, one has to compare the potential energy of the reactants and the products. If the potential energy of the product is less than that of the reactants, the reaction is exothermic.
4 0
3 years ago
#1: The element that loses electrons in a chemical reaction is said to have been which of the following?
Mrrafil [7]
#1: The element that loses electrons in a chemical reaction is said to have been which of the following? A. reduced

B. oxidized

C. combusted

D. rusted

**idk, is it reduced or oxidized??

Answer: oxidized. The element that loses electrons increases its oxidation number (becomes more positve or less negative) and this is oxidation.


Which type of reaction occurs if one element gains electrons and another loses electrons?

A. combustion

B. synthesis

C. oxidation-reduction

D. double-displacement

**my answer: C

Yes, oxidation-reduction

#3: What is the oxidation number for phosphorus in H4P2O7?

A. +5

B. +3

C. +1

D. - 1

**my answer: A. +5

This is the way to calculate it 4(+1) + 2x + 7(-2) = 0 => x = +5



#4: What is the oxidation number for phosphorus in Na2HPO3?

A. +5

B. +3

C. +1

D. - 1

**my answer; B. +3

is that right??

Right

2(+1) + 1 + x + 3(-2) = 0 => x = 6 -1 -2 = 3 (positive)
5 0
3 years ago
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Thermal energy is the energy associated with...... lectric fields. being stored in chemical bonds. the pull of gravity. temperat
satela [25.4K]
Temperature. Thermal is heat energy.
7 0
3 years ago
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In science, a summary of observed behavior is referred to as a(n)
umka2103 [35]

Answer:

Law

Explanation:

A law is a summary of observed (measurable) behavior, whereas a theory is an explanation of behavior. A law tells what happens; a theory (model) is our attempt to explain why it happens.

5 0
3 years ago
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