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Harlamova29_29 [7]
3 years ago
10

A baseball is thrown a distance of 20 meters. What is its speed if it takes 0.5seconds to cover the distance

Chemistry
1 answer:
satela [25.4K]3 years ago
4 0
The answer is that the baseball travels 40 miles per hour
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It is less dense than most other material and has a higher melting point so it will not melt.
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What’s potassium+calcium sulphate
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Potassium +calcium sulphate ------> K2SO4+Ca

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What is the density of a substance with a mass of 0.0450 and a volume of 26.4?
Tanya [424]

Answer:

density \:  =  \frac{mass}{volume}  \\  \:  \:  \:   \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  =  \frac{0.0450}{26.4}  \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:   \:  \:  \:  \:  \:  \:  \:  \: = 0.0017 \\

Explanation:

plz....

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7 0
4 years ago
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The substance which is dissolved in a solution is called
Zielflug [23.3K]
The substance that dissolves in a solution is called a solute.

This is because a solution is made up of 2 parts, the solute, which dissolves to make the solution, and the solvent, which is the substance that dissolves the solute.

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8 0
3 years ago
A solution has a pH of 4.20. Using the relationship between pH and pOH, what is the concentration of OH?? A. 9.9 × 10-1 M B. 6.2
vivado [14]

The correct answer is option E.

Explanation:

The pH of the solution is defined as negative logarithm of hydrogen ions  concentration in a solution. Mathematically written as:

pH=-\log[H^+]

The pOH of the solution is defined as negative logarithm of hydroxide ions  concentration in a solution. Mathematically written as:

pOH=-\log[OH^-]

The sum of ph and pOH is equal to 14.

pH + pOH = 14

A solution has a pH of 4.20.

pOH=14-pH=14-4.20=9.8

pOH=9.8=-\log[OH^-]

[OH^-]=1.58\times 10^{-10} M\approx 6.0\times 10^{-10} M

Hence, the correct answer is option E.

5 0
3 years ago
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