2 years ago

Acids or bases can be tested by chemical_________

Chemistry

2 answers:

DedPeter [7]2 years ago

7 0

Answer:

acids or bases can be tested

by chemical indicators

mafiozo [28]2 years ago

7 0

Chemical indicator is the correct answer

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Find the velocity in m/s (meters per second) of a swimmer who swims 500 meters toward shore in 50 seconds.

mihalych1998 [28]

To find the velocity, you would have to divide the meters given by the seconds given.

500 meters / 50 seconds = 10 meters per second.

Your answer would be 10 m/s

Hope this helps!

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3 years ago

Which kind of bond is formed when two atoms share electrons to form a molecule?

Zina [86]

A covalent bond is formed.

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4 years ago

Balance this chemical equation Ca(OH)2 + HCl ---> CaCl2 + H2O

steposvetlana [31]

Answer:

The balance equation of Ca(OH)2 + HCl ---> CaCl2 + H2O

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3 years ago

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3 years ago

Vehicle gasoline has many slightly different compositions depending on local laws. However, on average it has a density of 0.737

drek231 [11]

Answer: 20.1 kg.

Explanation:

To calculate mass of a substance, we use the equation:

$\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}$

We are given:

Density of gasoline = $0.737kg/L$

Volume of gasoline = $7.2gallons=7.2\times 3.785L=27.252L$ (Conversion factor: $1gal=3.785L$ )

Putting values in above equation, we get:

$0.737kg/L=\frac{\text{Mass of gasoline}}{27.252L}\\\\\text{Mass of gasoline}=20.084kg$

The rule apply for multiplication and division is :

The least precise number present after the decimal point determines the number of significant figures in the answer, thus the answer musty have three significant digits.

Hence, the mass added is 20.1 kg.

8 0

3 years ago