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3 years ago

Ok so the question is Sort the processes based on the type of energy transfer they involve. condensation

Chemistry

2 answers:

trapecia [35]3 years ago

8 0

Answer:

Maybe evaporation and sublimation??????????????????????

Explanation:

Lesechka [4]3 years ago

7 0

Maybe evaporation???????????????

You might be interested in

An apparatus consists of a 3 L ﬂask containing nitrogen gas at 17◦C and 822 kPa, joined by a valve to a 10 L ﬂask containing arg

forsale [732]

Answer:

a) 189.7 kPa

b) 45.4 kPa

c) 235 kPa

Explanation:

After the mixture, the temperature must remain the same, because both gases are at 17°C. Besides, the gases will not react because both nitrogen and argon are non-reactive. So, the partial pressure can be calculated by Boyle's Law:

P1*V1 = P2*V2

Where P is the pressure, V is the volume, 1 is the initial state, and 2 the final state.

When the valve is opened, the gases mix and occupy all the two vases. So, V2 = 13 L.

a) For nitrogen, P1 = 822 kPa, V1 = 3L, V2 = 13 L

822*3 = P2*13

P2 = 189.7 kPa

b) For argon, P1 = 59 kPa, V1 = 10 L, V2 = 13 L

59*10 = P2*13

P2 = 45.4 kPa

c) By Dalton's law, the total pressure of a gas mixture is the sum of the partial pressures of the components, so:

P = 189.7 + 45.4

P = 235 kPa

5 0

4 years ago

A compound of nitrogen and oxygen is 30.46 percent by mass of N and 69.54 percent by mass O. The molar mass if the compound was

agasfer [191]

Answer: Empirical formula is $NO_2$ and molecular formula is $N_2O_4$

Explanation: To find the empirical and molecular formula, we follow few steps:

Step 1: Converting mass percent into mass

We are given the percentage of elements by mass. So, the total mass take will be 100 grams.

Therefore, mass of nitrogen = $\frac{30.46}{100}\times 100g=30.46g$

Similarly, mass of oxygen = $\frac{69.54}{100}\times 100g=69.54$

Step 2: Converting the masses into their respective moles

We use the formula:

$Moles=\frac{\text{Given mass}}{\text{Molar mass}}$

Molar mass of Nitrogen = 14 g/mol

Molar mass of oxygen = 16 g/mol

Moles of nitrogen = $\frac{30.46g}{14g/mol}=2.18moles$

Moles of oxygen = $\frac{69.54g}{16g/mol}=4.35mol$

Step 3: Getting the mole ratio of nitrogen and oxygen by dividing the calculated moles by the lowest mole value.

Mole ratio of nitrogen = $\frac{2.18}{2.18}=1$

Mole ratio of oxyegn = $\frac{4.35}{2.18}=1.99\approx 2$

Step 4: The mole ratio of elements are represented as the subscripts in a empirical formula, we get

Empirical formula = $N_1O_2=NO_2$

Step 5: For molecular formula, we divide the molar mass of the compound by the empirical molar mass.

Empirical molar mass of $NO_2=(14\times 1)+(16\times 2)g/mol$

Empirical molar mass = 46 g/mol

Molar mass of the compound = 92 g/mol

$n=\frac{\text{Molar mass}}{\text{Empirical molar mass}}$

$n=\frac{92g/mol}{46g/mol}=2$

Now, multiplying each of the subscript of empirical formula by 'n', we get

Molecular formula = $N_2O_4$

6 0

3 years ago

Calculate the mass of arsenic trihydride produced from 117.4 g of hydrogen gas with excess arsenic trioxide:

Lana71 [14]

Answer: The mass of $AsH_3$ produced is, 1528.8 grams.

Explanation : Given,

Mass of $H_2$ = 117.4 g

Molar mass of $H_2$ = 2 g/mol

First we have to calculate the moles of $H_2$ .

$\text{Moles of }H_2=\frac{\text{Given mass }H_2}{\text{Molar mass }H_2}$

$\text{Moles of }H_2=\frac{117.4g}{2g/mol}=58.7mol$

Now we have to calculate the moles of $AsH_3$

The balanced chemical equation is:

$6H_2+As_2O_3\rightarrow 2AsH_3+3H_2O$

From the reaction, we conclude that

As, 6 moles of $H_2$ react to give 2 moles of $AsH_3$

So, 58.7 moles of $H_2$ react to give $\frac{2}{6}\times 58.7=19.6$ mole of $AsH_3$

Now we have to calculate the mass of $AsH_3$

$\text{ Mass of }AsH_3=\text{ Moles of }AsH_3\times \text{ Molar mass of }AsH_3$

Molar mass of $AsH_3$ = 78 g/mole

$\text{ Mass of }AsH_3=(19.6moles)\times (78g/mole)=1528.8g$

Therefore, the mass of $AsH_3$ produced is, 1528.8 grams.

6 0

3 years ago

Almost all of the oxygen on the planet Earth is found in the atmosphere. Is this true or false?

solong [7]

False. Almost all of the oxygen on Earth is found in the oceans.

3 0

4 years ago

Read 2 more answers

What is the number of each element and the total number of atoms for vinegar?

Mariulka [41]

There 3 elements wich is
C =4
H=8
O=4
So the total atoms are 16

4 0

3 years ago