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Alecsey [184]
3 years ago
12

Kate gathered three boxes of the same size made of different materials: glass, clear plastic, and aluminum painted black. she pl

aced them on a window sill in the sun for an hour then measured the warmth of the air in each box. in this experiment, the warmth of the air is a(n)________.
A. independent variable

B. control

C. dependent

D. constant
Chemistry
2 answers:
posledela3 years ago
7 0

In the given experiment there are three factors

a) type of material : these are independent of each other so are independent variable

b) time : one hour : we have a fixed time so this a constant

c) warmth of air : it is dependent on the time and also on the material of the boxes taken for keeping the air in sun. Thus answer is "Dependent"

Artyom0805 [142]3 years ago
5 0

I am sure that the answer is C dependent

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Answer:

A. Strong initial heating caused some of the hydrate sample to spatter out of the crucible.

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The percentage of water in the sample is lower than expected.

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4 0
3 years ago
What is the empirical formula for a compound that is 29.44\% calcium, 23.55% sulfur, and 47.01% oxygen? This compound is a commo
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Answer:

Empirical formula is CaSO₄.

Explanation:

Given data:

Percentage of calcium =29.44%

Percentage of sulfur = 23.55%

Percentage of oxygen = 47.01%

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Solution:

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Number of gram atoms of S = 23.55 / 32 = 0.74

Number of gram atoms of O = 47.01 / 16 = 3

Atomic ratio:

            Ca                      :        S                :         O

           0.74/0.74           :     0.74/0.74      :       3/0.74

               1                     :          1              :          4

Ca : S : O = 1 : 1 : 4

Empirical formula is CaSO₄.

3 0
3 years ago
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ANTONII [103]

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Second shell is the valence shell for fluorine and so it loses one electron from 2p to form  F^+  and the electron configuration of the ion becomes 1s^22s^22p^4 .


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3 years ago
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