What is the molality of a solution of 12.9 g of fructose (C6H12O6) in 31.0 g of water?

A gas made up of homonuclear diatomic molecules escapes through a pinhole times as fast as gas. Write the chemical formula of th

Art [367]

Answer:

The answer to the question is

Chlorine Cl₂

Explanation:

Graham's Law of effusion states that the rate of effusion of a gas is inversely proportional to the square root of the molar mass

$\frac{R_{1} }{R_{2}} = \sqrt{ \frac{M_{2}}{M_{1}} }$

0.238 = $\sqrt{ \frac{4}{M_{1}} }$

Therefore M₁ = 4÷0.238² = 70.61

Hence the mass of the gas is 70.61, that is X₂ = 70.61 or the molar mass of the element X = 70.61÷2 = 35.308 ≅35.453 Hence the gas is chlorine Cl₂

6 0

3 years ago

three students made multiple weighings of a copper cylinder each using a different balance. Describe the accuracy and precision

ch4aika [34]

I think that you have put up an incomplete question. However, i am answering the question based on my research and knowledge.

Lissa- accuracy and precision are both low
Lamont- accuracy and precision are definitely high
Leigh Anne- accuracy is low but precision is definitely high.

I hope that this is the answer that you were looking for and the answer has definitely come to your desired help.

3 0

3 years ago

Calculate the number of milliliters of 0.710 M Ba(OH)2 required to precipitate all of the Mn2+ ions in 161 mL of 0.796 M KMnO4 s

USPshnik [31]

Answer: The volume of barium hydroxide is 183 mL.

Explanation:

To calculate the moles of cadmium nitrate, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Moles of solute}}{\text{Volume of solution (in L)}}$ .....(1)