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salantis [7]
3 years ago
5

A graduated cylinder initially contained 11 mL of water and then an 8 g block of wood is put into it, changing the volume to 15

mL. What is the density of the wood?
Chemistry
1 answer:
Paul [167]3 years ago
8 0

Answer:

Density is 2

Explanation:

Do the final volume of water divided by the inital

volume of water to get 4

15-11 = 4

Volume = 2

Mass = 8

Then to the equation m/v

8/4 = 2

Density = 2

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(34.6785 x 5.39) + 435.12
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To solve this, we should follow order of operations. To start, we should multiply the values inside of the parentheses.

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186.917115+435.12

Now, we should add the 2 values we are left with together.

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How many grams of water will be produced from 50 g hydrogen reacting with 50 g oxygen?
DanielleElmas [232]

We need to first come up with a balanced equation:


4H+O_{2} → 2H_{2}O


We know that the molar ratio of hydrogen to oxygen to water now is 4:1:2.


Converting the amount of grams given to moles is as follows:


Hydrogen: \frac{1mole}{1.008g}*50g=49.6mol


Oxygen: \frac{1mole}{15.999g}*50g=3.125mol


We know now that the limiting reactant is oxygen. We can then know that the number of moles of water are produced are double the number of moles of oxygen used due to the ratio that we established at the beginning - 4:1:2.


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Now we know that there are 112.59g of water produced when we start with 50g of hydrogen and 50g of water.

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3 years ago
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Usimov [2.4K]
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