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Julli [10]
3 years ago
15

A working model used to test a design is called a

Chemistry
1 answer:
Lisa [10]3 years ago
5 0

Answer:

A working model used to test a design is called a

stop

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2.<br> Why does<br> a chemical equation<br> need to<br> be balanced?
arlik [135]

<em>Answer:</em>

<em>Chemical equations must be balanced to satisfy the law of conservation of matter, that states that matter cannot be produced or destroyed in a closed system. The law of conservation of mass governs the balancing of a chemical equation.</em>

Explanation:

7 0
2 years ago
What color does blue and cyan pigment make?
Fed [463]

Answer:

Teal

Explanation:

Blue lightens the cyan.

3 0
3 years ago
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Which of these is an indication that a chemical reaction has occurred?
nevsk [136]

Formation Of A Gas.

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3 years ago
Use the portion of the periodic table shown below to answer the questions. A portion of the first three columns of the periodic
Anna71 [15]

I'm not sure about part 1, you may need to google it, but part two is 11 protons, 11 electrons and 12 neutrons. You can find protons and electrons by just looking at the atomic number, and you can find neutrons by subtracting the atomic number from the atomic mass.

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3 years ago
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If 85.0 L of helium at 29.0°C is compressed to 32.0 L at constant pressure, what is the new temperature?
Feliz [49]

Answer:

113.69°k

Explanation:

V1=85L of helium                         V2=32L

T1= 29°C +273= 302°K                 T2=?

     T2=<u>TIV2</u>

              V1

    T2=<u>(302)(32)</u>= <u>9664</u>

                85           85

    T2=  113.69°K

3 0
2 years ago
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