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3 years ago

A flask at room temperature contains exactly equal amounts (moles of nitrogen and oxygen.

1 answer:

7 0

Equal amounts (moles of nitrogen and oxygen).

a. which gas has the higher partial pressure?

Partial pressure is proportional to the molar fraction of the gas.

Given that there are equal amounts, the molar fractions and the partial pressures are equal.

b. molecules of which gas have the higher average velocity?

The average velocity is inversely related to the square root of molar mass of the gas, then the gass with the lower molar mass will have the higher average velocity.

Molar mass of N2 = 2 * 14 g/mol = 28 g/mol
Molar mass of O2 = 2 * 16 g/mol = 32 g/mol

Then, N2 will have a higher average velocity.

c. the molecules of which gas effuses more quickly if a small hole was opened in the flask?

The effusion rate is inversely related to the square root of the molar mass, then the gas with the lower molar mass will effuse more quickly.

Therefore, N2 will effuse more quickly.

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2) You water three sunflower plants with salt water. Each plant receives a different

hichkok12 [17]

Answer:

the sunflower grow four

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3 years ago

A 20 ounce bottle of soda provides a total of 300. calories. how many kilojoules are in the soda

Yuri [45]

The ratio which denotes the relation between the two different units is said to conversion factors.

According to conversion factors, the relation between calorie and kilojoule is given as, one Calorie is equal to 4.184 kJ.

1 Cal = 4.184 kJ

Now, according to above relation, convert 300 calories into kilojoules.

300 calories = $300 Cal\times \frac{4.184 kJ}{1 Cal}$

= $1255.2 kJ$

$\simeq 1255 kJ$

Thus, kilojoules present in soda is equal to $1255 kJ$

6 0

3 years ago

Read 2 more answers

A hydrate is determined to be 45.43% water and 54.57% CoCl. Find the chemical formula and name for this hydrate. (*Hint - assume

sdas [7]

Answer : The chemical formula for the given compound is $COCl_2.6H_2O$

Explanation : Given,

If percentage are given then we are taking total mass is 100 grams.

So, the mass of each element is equal to the percentage given.

Mass of $H_2O$ = 45.43 g

Mass of $COCl_2$ = 54.57 g

Molar mass of $H_2O$ = 18 g/mole

Molar mass of $COCl_2$ = 129.9 g/mole

To formulate the chemical formula, we need to follow some steps:

Step 1: Converting the given masses into moles.

Moles of water = $\frac{\text{Given mass of water}}{\text{Molar mass of water}}=\frac{45.43g}{18g/mole}=2.524moles$

Moles of $COCl_2$ = $\frac{\text{Given mass of }COCl_2}{\text{Molar mass of }COCl_2}=\frac{54.57g}{129.9g/mole}=0.4201moles$

Step 2: Calculating the mole ratio of the given molecule.

For the mole ratio, we divide each value of the moles by the smallest number of moles calculated which is 0.4201 moles.

For $H_2O$ = $\frac{2.524}{0.4201}=6.00\approx 6$

For Carbon = $\frac{0.4201}{0.4201}=1$

Step 3: Taking the mole ratio as their subscripts.

The ratio of $COCl_2:H_2O$ = 1 : 6

The chemical formula for the given compound is $(COCl_2)_1(H_2O)_6=COCl_2.6H_2O$

Hence, the chemical formula for the given compound is $COCl_2.6H_2O$

7 0

4 years ago

How many valence electrons must Calcium lose when forming an ionic compound with Bromine?

SOVA2 [1]

Answer:

Explanation:

7 0

3 years ago

Determine the ka of an acid whose 0.294 m solution has a ph of 2.80. 1.2 x 10-5 8.5 x 10-6 2.7 4.9 x 10-7 5.4 x 10-3

Alika [10]

1) Calculate [H+] from the pH:

pH = log { 1 / [H+] } = - log [H+]

=> [H+] = 10 ^ (-pH)

=> [H+] = 10 ^ (-2.80) = 0.00158

2) Assume the stoichiometry 1:1

=> HA aq ---> H(+) aq+ A(-) aq

=> [A-] = [H+] = 0.00158

[HA] = 0.294 – 0.00158 = 0.29242

3) Calculate Ka

Ka = [H+] *[A-] / [HA] = (0.00158)*(0.00158) / 0.29242 =8.54 * 10^ -6

Answer: 8.5 * 10^ -6

6 0

4 years ago