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Anastaziya [24]

3 years ago

8

Which atoms combine together during fusion reaction on the sun?

2 answers:

PtichkaEL [24]3 years ago

8 0

Explanation:

its hydrogen I took the test and got it right

shusha [124]3 years ago

5 0

Answer:

Hydrogen

Explanation:

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six different aqueous solutions are represented in the beakers below, and there total volumes are noted. (a) which solution has

wolverine [178]

The molarity of the solutions are as follows:

solution B has the highest molarity
solutions A, D and F have the same molarity
solutions A and C are mixed together have a lower molarity than B
solution F and D will have the same molarity
Volume of water required to be evaporated is 8.3 mL

<h3>What is molarity of a solution?</h3>

The molarity of a solution is the amount in moles of a substance present in a given volume of solution.

From the image of the solution given:

solution B has the highest molarity
solutions A, D and F have the same molarity
when solutions A and C are mixed, the resulting solution have a lower molarity than B
solution F and D will have the same molarity after 75 mL and 50 mL of water are added to each respectively
the molarity of B is 12/50 = 4/16.7. Volume of water required to be evaporated = 25 - 16.7 = 8.3 mL

Therefore, the molarity of the solutions depends on the moles of substance present per given volume of solution.

Learn more about molarity at: brainly.com/question/24305514

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6 0

2 years ago

What is the area beyond the black hole where the black hole has stopped expanding and matter will no longer be pulled in?

gregori [183]

C. dk I’m just trying to get points sorry

7 0

2 years ago

Did other scientists accept Henri Becquerel's atomic theory model

tatuchka [14]

O they did not
at least thats what my substitute teacher said

6 0

3 years ago

A student has a 2.19 L bottle that contains a mixture of O 2 , N 2 , and CO 2 with a total pressure of 5.57 bar at 298 K . She k

Sergeeva-Olga [200]

<u>Answer:</u> The partial pressure of oxygen gas is 2.76 bar

<u>Explanation:</u>

To calculate the number of moles, we use the equation given by ideal gas which follows:

$PV=nRT$

where,

P = pressure of the gas = 5.57 bar

V = Volume of the gas = 2.19 L

T = Temperature of the gas = 298 K

R = Gas constant = $0.0831\text{ L bar }mol^{-1}K^{-1}$

n = Total number of moles = ?

Putting values in above equation, we get:

$5.57bar\times 2.19L=n\times 0.0831\text{ L. bar }mol^{-1}K^{-1}\times 298K\\\\n=\frac{5.57\times 2.19}{0.0831\times 298}=0.493mol$

To calculate the mole fraction of carbon dioxide, we use the equation given by Raoult's law, which is:

$p_{A}=p_T\times \chi_{A}$ ........(1)

where,

$p_A$ = partial pressure of carbon dioxide = 0.318 bar

$p_T$ = total pressure = 5.57 bar

$\chi_A$ = mole fraction of carbon dioxide = ?

Putting values in above equation, we get:

$0.318bar=5.57bar\times \chi_{CO_2}\\\\\chi_{CO_2}=\frac{0.381}{5.57}=0.0571$

Mole fraction of a substance is given by:

$\chi_A=\frac{n_A}{n_A+n_B}$

We are given:

Moles of nitrogen gas = 0.221 moles

Mole fraction of nitrogen gas, $\chi_{N_2}=\frac{0.221}{0.493}=0.448$

Calculating the partial pressure of oxygen gas by using equation 1, we get:

Mole fraction of oxygen gas = (1 - 0.0571 - 0.448) = 0.4949

Total pressure of the system = 5.57 bar

Putting values in equation 1, we get:

$p_{O_2}=5.57bar\times 0.4949\\\\p_{O_2}=2.76bar$

Hence, the partial pressure of oxygen gas is 2.76 bar

6 0

3 years ago

MrRissso [65]

Answer:

true

Explanation:

the small car also has gravity making it heavy

8 0

3 years ago