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DiKsa [7]
3 years ago
11

36

Chemistry
2 answers:
Alex_Xolod [135]3 years ago
7 0

Answer: kr

Explanation:

LiRa [457]3 years ago
4 0
Omg that is that ( but I do not know this
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A sample of helium gas has a volume of 900. milliliters and a pressure of 2.50 atm at 298 K. What is the new pressure when the t
Sergio039 [100]

<span>The combined Boyle's and Charles' gas law says P1V1/T1 = P2V2/T2 </span>

<span>In this case we have (2.5 atm) (900 ml) / 298 K = (P2) (450 ml) / 336 K -----> </span>
<span>7.55 = 1.34P2 -----> P2 = 7.55 / 1.34 = 5.63 atm</span>
5 0
3 years ago
What is the solution to the problem expressed to he correct number of significant figures? 12.0/7.11
Law Incorporation [45]

Answer: The solution to the problem expressed to he correct number of significant figures is 1.69

Explanation:

Significant figures : The figures in a number which express the value -the magnitude of a quantity to a specific degree of accuracy is known as significant digits.

The rule applied for multiplication and division is :

The least precise number determines the number of significant figures in the answer.

As 12.0 has 3 significant digits and 7.11 also has 3 significant digits, the answer would also contain 3 significant digits.

For \frac{12.0}{7.11}=1.69

Thus the solution to the problem expressed to he correct number of significant figures is 1.69

6 0
3 years ago
Please help im stuck
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Refer to attachment please this is one of my study questions and im stuck
Reil [10]
Percentage yield= actual yield/theoretical yield x100
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