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strojnjashka [21]
3 years ago
7

What is the mass of 3.022 moles of cobalt?

Chemistry
1 answer:
mote1985 [20]3 years ago
7 0

Answer:

178.1g

Explanation:

m= n × MM

where

m is mass

n is moles &

MM is molecular mass

The molecular mass of cobalt is 58.933195. With this information and the number of moles given in the question, we can perform the calculation

m= 3.022 × 58.933195

m=178.09611529

m= 178.1g

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g 1.000 atm of oxygen gas, placed in a container having a pinhole opening in its side, leaks from the container 2.14 times faste
Ivan

The question is incomplete, the complete question is;

1.000 atm of Oxygen gas, placed in a container having apinhole opening in its side. leaks from the container 2.14 timesfaster thatn 1.000 atm of an unknown gas placed in this sameapparatus. Which of the following species could be theunknown gas?

A. CL2

B. SF6

C. Kr

D. UF6

E. Xe

Answer:

SF6

Explanation:

From Graham's law;

Let the rate of diffusion of oxygen be R1

Let the rate of diffusion of unknown base be R2

Let the molar mass of oxygen by M1

Let the molar mass of unknown gas be M2

Hence;

R1/R2 = √M2/M1

So;

2.14/1 = √M2/32

(2.14/1)^2 = M/32

M= (2.14/1)^2 × 32

M= 146.6

This is the molar mass of SF6 hence the answer above.

7 0
3 years ago
How many grams of MgCl2 would be needed to make 5.3 liters of a 0.25 molar solution? Round your answer to the nearest 0.01,
GuDViN [60]

Answer: 126.1 grams of are needed to make 5.3 L of 0.25 M solution

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

To calculate the mass of solute for given molarity, we use the equation:

\text{Molarity of the solution}=\frac{\text{given mass of solute}}{\text {Molar mass of solute}\times \text{Volume of solution in L}}

0.25M=\frac{x}{95.2g/mol\times 5.3L}

x=126.1g

Thus 126.1 grams of are needed to make 5.3 L of 0.25 M solution

6 0
3 years ago
How could you distinguish between cyclohexane and cyclohexene using ir?
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When we are performing IR spectroscopy for Cyclohexane and cyclohexene, we can distinguish them as cyclohexene has C-H carbon-hydrogen stretching so, it shows the absorption at 3000-2850 cm⁻¹ range, where the cyclohexane do not have this and it shows the -C=C- stretch at 1640-1680 cm⁻¹ range in the spectrum. So that is how we can distinguish both.
8 0
4 years ago
In the following reaction, how many grams of ammonia (NH3) will produce 300 grams of N2? 4NH3 + 6NO → 5N2 + 6H2O The molar mass
ycow [4]
<span>145.899 g / 145.90 g</span>
5 0
3 years ago
Read 2 more answers
8. The range (rainbow) of colors of visible light can be explained by ROY.G.BIV. What does ROY.G.BIV mean? List out the colors i
VLD [36.1K]

Answer:red, orange, yellow, green, blue, indigo and violet.

Explanation:

4 0
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