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fgiga [73]
4 years ago
15

What is an indicator that a chemical change has occurred?

Chemistry
2 answers:
LenaWriter [7]4 years ago
7 0

Answer: a change in energy

Explanation:

Aleks04 [339]4 years ago
6 0

Answer:

That something has changed chemically

Explanation:

Uh...Google it

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3 years ago
1. A gas is confined in a cylinder with a movable piston at one end. When the volume of the
Sedaia [141]

Answer: 211 kPa

Explanation:

Given that,

Original pressure of gas (P1) = 125 kPa

Original volume of cylinder (V1) = 760 cm3

New pressure of gas (P2) = ?

New volume of cylinder (V2) = 450 cm3

Since pressure and volume are given while temperature is held constant, apply the formula for Boyle's law

P1V1= P2V2

125 kPa x 760 cm3= P2 x 450 cm3

95000 kPa•cm3 = 450 cm3•P2

Divide both sides by 450 cm3

95000 kPa•cm3/450 cm3 = 450 cm3•P2/450 cm3

211.1 kPa = P2

[Round the value of P2 to 3 significant numbers. Hence, P2 becomes 211 kPa]

Thus, the new pressure within the cylinder is 211 kPa

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3 years ago
a) What is distilled water? What are some examples of purified water? How does water purification by distillation and reverse os
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3 years ago
What is the balanced molecular equation and balanced chemical equation for NaSO4 and KNO3?
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=KSO4+Na2(NO3)2

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Container A holds 767 mL of an ideal gas at 2.80 atm. Container B holds 154 mL of a different ideal gas at 4.50 atm.
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Answer:

Explanation:

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