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3 years ago

Plz answer #4 Best answer will get BRAINLIEST!!!

Chemistry

2 answers:

jek_recluse [69]3 years ago

5 0

Different types of soil??

kolezko [41]3 years ago

4 0

A ??????

B ??????

Hope this didn't help!!!

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Zinc has a specific heat capacity of 0.390 J/goC. What is its molar heat capacity? Enter your answer numerically to three signif

ch4aika [34]

Answer:

The answer to your questions is Cm = 25.5 J/mol°C

Explanation:

Data

Heat capacity = 0.390 J/g°C

Molar heat capacity = ?

Process

1.- Look for the atomic number of Zinc

Z = 65.4 g/mol

2.- Convert heat capacity to molar heat capacity

(0.390 J/g°C)(65.4 g/mol)

- Simplify and result

Cm = 25.5 J/mol°C

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3 years ago

Why are standards needed for measured quantities?

Alex

In chemistry the need for standards when measuring quantities are in place for accurate measurement that is recognized world wide. This way, no matter what language people use, they will always understand there standards.

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4 years ago

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Co (5.00 g) and co2 (5.00 g) were placed in a 750.0 ml container at 50.0°c. the total pressure in the container was __________ a

masya89 [10]

The molar mass of CO is 28 g/mol while that of CO2 is 44 g/mol. Let us calculate the total moles present in the container.

total moles = [5g / (28 g/mol)] + [5g / (44 g/mol)]

total moles = 0.2922 mol

Using PV = nRT, we get the pressure:

P = nRT / V

P = (0.2922 mol * 0.0821 L atm/mol K * 323.15 K) / 0.75 L

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4 years ago

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At sea level water usually boils at 100. °C and 760. mmHg pressure. On Mt Whitney, the pressure is about 560. mmHg. At what temp

WITCHER [35]

Answer:

91.7°C

Explanation:

We suppose you have a formula to work from. However, that is not supplied with this problem statement, so we looked one up.

The formula in the attachment is supposed to have good accuracy in the temperature range of interest. It gives vapor pressure of water in kPa, not mmHg, so we needed the conversion for that, too.

560 mmHg corresponds to about 74.66 kPa. The attached "Buck equation" formula is used to find the corresponding temperature. The exponential equation could be solved algebraically using logarithms and the quadratic formula, but we choose to find the solution graphically.

Water boils at about 91.7 °C on Mt. Whitney.

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3 years ago

Which BEST describes how an experiment should be designed?

vova2212 [387]

Answer:

form a hypothesis.

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3 years ago