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disa [49]
3 years ago
8

What is the largest layer of Earth?

Chemistry
1 answer:
7nadin3 [17]3 years ago
3 0
The mantle is the largest one
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A 4.86-gram sample of calcium reacted completely with oxygen to form 6.80 grams of calcium oxide. This reaction is represented b
sesenic [268]
The number of mole of Ca reacted is:
4.86 g Ca/ (40.08 g/mol Ca)= 0.121 mol Ca

Because Ca reacted completely with oxygen and there is 2 mol Ca, there is 1 mol O2 reacted.

Total mass of oxygen that reacted is:
0.121 mol Ca* (1mol O2/ 2 mol Ca)* (32 g O2/ 1 mol O2)= 1.94 g O2 reacted.

Hope this would help~
8 0
3 years ago
Please help, 15 points
oee [108]

1rst is D, second is A

Explanation:

5 0
3 years ago
How do the densities of the two objects compare?
Marizza181 [45]
Compare the density of the object in question to the density of water. If its density is less than water, it will float. For example, oak floats because its density is 0.7 g/cm³. If the density of an object is greater than water, it will sink.
3 0
3 years ago
240 g of water (specific heat = 4.186 J/g°C, initial temperature = 20°C) is mixed with an
ivolga24 [154]
The answer for this would be 69.6
3 0
3 years ago
Need help please please
MatroZZZ [7]

Answer:

1) 4

2) 1/9

3) 46.5

4) 5.8

Explanation:

Density= Mass/Volume

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4) D=75/13=5.8

7 0
3 years ago
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