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stira [4]
3 years ago
7

How many moles are in 68.5 liters of oxygen gas at STP?

Chemistry
1 answer:
valina [46]3 years ago
6 0
3.05 moles of oxygen gas
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A compound is found to contain 26.73 % phosphorus, 12.09 % nitrogen, and 61.18 % chlorine by mass. What is the empirical formula
Mrrafil [7]

Answer:

PNCl_2

Explanation:

Hello!

In this case, when determining empirical formulas by knowing the by-mass percent, we first must assume the percentages as masses so we can compute the moles of each element:

n_P=\frac{26.73g}{30.97g/mol}=0.863mol\\\\n_N=\frac{12.09g}{14.01g/mol}=0.863mol\\\\n_C_l=\frac{61.18g}{35.45g/mol}=1.726mol

Now, for the determination of the subscript of each element in the empirical formula, we divide the moles by the fewest moles (P or N):

P=\frac{0.863mol}{0.863mol}=1\\\\N= \frac{0.863mol}{0.863mol}=1\\\\Cl=\frac{1.726mol}{0.863mol}2

Thus, the empirical formula is:

PNCl_2

Regards!

4 0
2 years ago
The orbits of ___ lie closer to the Sun than does Earth's orbit.
vampirchik [111]
Mercury and Venus is the correct answer
8 0
3 years ago
Consider the reaction below.
patriot [66]

Answer:

HI and I-

Explanation:

Hello there!

In this case, according to the acid ionization of hydroiodic acid:

HI+H_2O\rightarrow I^-+H_3O^+

Now, since the acid, HI, results in the conjugate base, I- and the base, H2O in the conjugate acid, H3O+, it is correct to assert that the acid-conjugate base pair is HI and I-

Best regards!

6 0
3 years ago
a household’s voltage is 120 volts, what is the power rating of a light bulb with 0.5 amps of current flowing through it?
xenn [34]
Your answer should be 110 volts
3 0
3 years ago
Please help! I don’t think my answer is right!
Ostrovityanka [42]

Answer:

Thats right! Gj!

Explanation:

4 0
2 years ago
Read 2 more answers
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