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3 years ago

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Chemistry

1 answer:

a_sh-v [17]3 years ago

7 0

The writers of the Articles of Confederation wanted to preserve the states' sovereignty.

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What is the pressure of 0.33 moles of nitrogen gas, if its volume is 15.0 L at –25.0oC?

musickatia [10]

Using the ideal gas law PV =nRTPV=nRT , we find that the pressure will be P =\frac{nRT}{V}P=

nRT

. Then, we'll substitute and find the pressure, using T = -25 °C = 248.15 K and R = 0.0821 \frac{atm\cdot L}{mol \cdot K}

mol⋅K

atm⋅L

P =\frac{nRT}{V} = \frac{(0.33\,\cancel{mol})(0.0821\frac{atm\cdot \cancel{L}}{\cancel{mol \cdot K}})(248.15\,\cancel{K})}{15.0\,\cancel{L}} = 0.4482\,atmP=

nRT

15.0

(0.33

mol

)(0.0821

mol⋅K

atm⋅

)(248.15

)

=0.4482atm

In conclusion, the pressure of this gas is P=0.4482 atm.

Reference:

Chang, R. (2010). Chemistry. McGraw-Hill, New York.

3 0

2 years ago

How much heat, in kJ, is required to raise the temperature of 50 g of water by 5.53°C? (Round to the nearest 10 kJ, and enter on

Triss [41]

Answer:

$Q=1.16kJ$

Explanation:

Hello,

in this case, the required heat to increase the water by 5.53 °C is computed by using the mass, heat capacity and change in temperature during the process:

$Q=mCp\Delta T$

Thus, for the given data we compute it in kJ:

$Q=50g*4.186\frac{J}{g*\°C}*(5.53\°C)*\frac{1kJ}{1000J} \\\\Q=1.16kJ$

Best regards.

5 0

3 years ago

Explain in your own words what the conservation of mass means?pls help

grigory [225]

Answer:

the conservation of mass means matter can be created or destroyed, it only changes forms

Explanation:

plz mark me as brainliest

6 0

3 years ago

Read 2 more answers

Chemists and physicists often have to manipulate and control a variable that they want to study. Scientists who need to control

Inessa05 [86]

The answer is D I took the test

4 0

3 years ago

Read 2 more answers

Draw the structure of (z)-3-bromo-6-methyl-2-heptene. be sure the stereochemistry is drawn clearly.

Anna007 [38]

Explanation: In IUPAC, E-Z convention is given for describing the cis - trans notation to the isomers. According to CIP rule, the groups on the doubly bonded carbon atoms are given priorities based on the the atomic masses of first connected atom.

If the highest priority groups are on the same side, it is known as Z-form and if the highest priority groups are on opposite side, it is known as E-form.

We are given (Z)-3-bromo-6-methyl-2-heptene, in this the highest priority groups are bromine on one side and methyl- group on another side.

The structure is provided in the image below.

6 0

3 years ago