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igomit [66]
2 years ago
6

PLZ HELP!!!! Will give brainliest

Chemistry
2 answers:
Travka [436]2 years ago
7 0
1.68M
Give brainliest if u can THX :)
7nadin3 [17]2 years ago
6 0

Answer:

1.68 M

Explanation:

Molar mass (KNO3)= 101.1 g/mol

89g KNO3* 1mol/101.1 g = 89/101.1 mol

(89/101.1 mol)/0.525 L= 1.68 mol/L = 1.68 M

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Explanation:

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Balance this equation K+b2o3=k2o+b
AVprozaik [17]

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Explanation:

2K and 2b

5 0
2 years ago
Why is a crystal of Strontium chloride described as an extended structure?
olchik [2.2K]

Answer:

Explanation:

Chloride is described as an extended structure because its atoms are arranged following an endless repeating pattern and are of distinct ratio

Crystals and polymers mostly form extended structures as seen in the formation of sodium chloride whereby the ions in the compound are arranged following a repeating pattern. ( i.e. has a giant ionic structure ).

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5 0
2 years ago
When 28.0 g of acetylene reacts with hydrogen, 24.5 g of ethane is produced. What is the percent yield of C2H6 for the reaction?
Afina-wow [57]

Answer:

Y=75.6\%

Explanation:

Hello.

In this case, since no information about the reacting hydrogen is given, we can assume that it completely react with the 28.0 g of acetylene to yield ethane. In such a way, via the 1:1 mole ratio between acetylene (molar mass = 26 g/mol) and ethane (molar mass = 30 g/mol), we compute the yielded grams, or the theoretical yield of ethane as shown below:

m_{C_2H_6}^{theoretical}=28.0gC_2H_2*\frac{1molC_2H_2}{26gC_2H_2}*\frac{1molC_2H_6}{1molC_2H_2}  *\frac{30gC_2H_6}{1molC_2H_6}\\ \\m_{C_2H_6}^{theoretical}=32.3gC_2H_6

Hence, by knowing that the percent yield is computed via the actual yield (24.5 g) over the theoretical yield, we obtain:

Y=\frac{24.5g}{32.3g}*100\%\\ \\Y=75.6\%

Best regards.

3 0
3 years ago
PLEASE HELP ME!!! WORTH 20 POINTS!!!
svlad2 [7]

Answer:

You need to heat the mixture to 78.37°C

Explanation:

In distillation, you can separate 2 or more compounds based on their difference in boiling points.

In a mixture of ethanol and water, in theory, you need to heat the mixture to 78.37°C. In this temperature, the ethanol must be evaporated and then condensed in the receiving flask.

5 0
3 years ago
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