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rusak2 [61]
4 years ago
6

How were the Great Lakes formed?

Chemistry
1 answer:
Kipish [7]4 years ago
5 0
The answer is a because the other ones don’t make sense
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Which of the following is an example of an environmental problem caused by chemicals?
Dmitrij [34]

Answer: c

Explanation:

3 0
3 years ago
In ____________, particles change directly from a solid to a gas
goblinko [34]

Answer:

Sublimation.

Explanation:

Sublimation is the conversion between the solid and the gaseous phases of matter, with no intermediate liquid stage

8 0
3 years ago
A sample of gas has a mass of 827 mg . Its volume is 0.270 L at a temperature of 88 ∘ C and a pressure of 975 mmHg . Find its mo
avanturin [10]

Steps:

Mw = w * R * T / p * V

T = 88 + 273 => 361 K

p = 975 mmHg in atm :

1 atm  = 760 mmHg

975 mmg / 760 mmHg =>  1.28 atm

Therefore:

= 0.827 * 0.0821 * 361 /  1.28 * 0.270

=  24.51 / 0.3456

molar mass =  70.92 g/mol



7 0
3 years ago
1. What is an isomer? How many possible isomers of hexane are there? What are the structural differences between these isomers?
UNO [17]
When two compounds have same molecular formula but different structural formula, they are said to be isomers of each other and this phenomenon is called as isomerism. 

Hexane has six isomers.

The isomers of hexane have a difference in their structure due to parent chain length (chain isomerism). They are also differentiated on the basis of straight chain as in n-hexane and branched chain as in remaining five. Structures along with names are shown below.

8 0
3 years ago
Calculate the number of C, H, and O atoms in 1.75 g of squaric acid
strojnjashka [21]
As far as I remember, the needed formula for squaric acid is C4H2O4.
According to this one mole should be  114.06 g., which means we have <span>0.015mol of this acid.
Then we can  easly calculate : </span><span>4(0.015) = 0.06 mol for both for Carbon and Oxygen and </span><span>0.03 mol of Hydrogen.
</span><span>To get more clear answer, we multiply by avogadros : 
</span><span>6.022 x 10^23. Hope everything is clear! regards</span>
4 0
3 years ago
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