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schepotkina [342]
3 years ago
12

What is the density of a piece of wood that has a mass of 25.0 g and a volume of 29.4 mL?

Chemistry
1 answer:
olga55 [171]3 years ago
6 0

Answer:

0.850 g / cm3

Explanation:

The problem can be solved using the formula:

Density = mass / volume

Since two of the data are already provided in the problem, just plug in the values to the formula.

(Rearrangement of the formula from its standard form is not necessary at all)

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What is a acid and how does it react with metals (chemical reaction)?
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Explanation:

Acids are substances whose ph is lower than 7.Acids react with most metals to form a salt and hydrogen gas.

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Read 2 more answers
250 ml glass of lemon juice contains 20 grams of sugar. How much sugar is in 500 ml bottle
iren2701 [21]

There is 40 g of sugar in a 500 ml bottle of lemon juice

<h3>Further explanation</h3>

The concentration of a substance can be expressed in several quantities such as moles, percent (%) weight/volume,), molarity, molality, parts per million (ppm) or mole fraction. The concentration shows the amount of solute in a unit of the amount of solvent.

the concentration of sugar in lemon juice :

\tt \dfrac{20~g}{250~ml}=0.08~g/ml

So for 500 ml juice :

\tt 500\times 0.08=40~g~sugar

5 0
3 years ago
Which choice below would affect the rate of reaction in the opposite way from the other four?
bulgar [2K]
Adding a catalyst as this would speed up the reaction and the rest would slow it down
4 0
3 years ago
Acetic acid is a weak acid with a pKa of 4.76. What is the concentration of acetate in a buffer solution of 0.2M at pH 4.9. Give
Ghella [55]

Answer:

[base]=0.28M

Explanation:

Hello,

In this case, by using the Henderson-Hasselbach equation one can compute the concentration of acetate, which acts as the base, as shown below:

pH=pKa+log(\frac{[base]}{[acid]} )\\\\\frac{[base]}{[acid]}=10^{pH-pKa}\\\\\frac{[base]}{[acid]}=10^{4.9-4.76}\\\\\frac{[base]}{[acid]}=1.38\\\\

[base]=1.38[acid]=1.38*0.20M=0.28M

Regards.

6 0
3 years ago
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