2 years ago

A Write a description of how you know a chemical reaction is occurring

1 answer:

7 0

Answer: Some signs of a chemical change are a change in color and the formation of bubbles. The five conditions of chemical change: color change, formation of a precipitate, formation of a gas, odor change, temperature change

Explanation:

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It is based on the water underground

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How many Joules of heat are released from a 400g piece of glass that has been cooled

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400 × 22 × 0.664 = 5843.2 J

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2 years ago

When a 10 mL graduated cylinder is filled to the 10 mL mark, the mass of the water was measured to be 9.925 g. If the density of

Vlada [557]

Measured volume = 10 ml
mass = 9.925 g
density = 0.9975 g/ml
density = $\frac{mass}{volume}$
so actual volume = $\frac{mass}{density}$ = $\frac{9.925}{0.9975}$ = 9.95 mL
Percentage Error = $\frac{measured volume - Actual volume}{actual volume}$ x 100
= $\frac{10 - 9.95}{9.95}$ x 100 = 0.5 % error

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3 years ago

Give Me a simple definition for Acids.

levacccp [35]

Answer:

an acid is a substance which produces hydrogen ions as the only as the only positive ion when dissolved in water.

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1 year ago

for a theoretical yield of 22 g and actual yield of 13 g, calculate the percent yield for a chemical reaction

sammy [17]

Answer:

59.09%

Explanation:

13/22*100=59.09%

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3 years ago