All categories

2 years ago

Calculate the mass of CaCl2 ( formula wt. = 110.99) thatshould

Chemistry

1 answer:

NNADVOKAT [17]2 years ago

7 0

Answer: 5622.6g

Explanation:

Note: Kf for water is 1.86°C/m.

The simple calculation is in the attachment below.

You might be interested in

4) What volume will the gas in the balloon at right occupy at 250k?<br><br> balloon: 4.3L 350K

swat32

Answer:

2.87 liter.

Explanation:

Given:

Initially volume of balloon = 4.3 liter

Initially temperature of balloon = 350 K

Question asked:

What volume will the gas in the balloon occupy at 250 K ?

Solution:

By using:

$Pv =nRT$

Assuming pressure as constant,

V∝ T

Now, let K is the constant.

V = KT

Let initial volume of balloon , $V_{1}$ = 4.3 liter

1000 liter = 1 meter cube

1 liter = $\frac{1}{1000} m^{3} = 10^{-3} m^{3$

4.3 liter = $4.3\times10^{-3}=4.3\times10^{-3} m^{3}$

And initial temperature of balloon, $T_{1}$ = 350 K

Let the final volume of balloon is $V_{2}$

And as given, final temperature of balloon, $T_{2}$ is 250 K

Now, $V_{1} = KT_{1}$

$4.3\times10^{-3}=K\times350\ (equation\ 1 )$

$V_{2} = KT_{2}$

$=K\times250\ (equation 2)$

Dividing equation 1 and 2,

$\frac{4.3\times10^{-3}}{V_{2} } =\frac{K\times350}{K\times250}$

K cancelled by K.

By cross multiplication:

$350V_{2} =4.3\times10^{-3} \times250\\V_{2} =\frac{ 4.3\times10^{-3} \times250\\}{350} \\ = \frac{1075\times10^{-3}}{350} \\ =2.87\times10^{-3}m^{3}$

Now, convert it into liter with the help of calculation done above,

$2.87\times10^{-3} \times1000\\2.87\times10^{-3} \times10^{3} \\2.87\ liter$

Therefore, volume of the gas in the balloon at 250 K will be 2.87 liter.

4 0

3 years ago

He nucleus contains the cells genetic material in the form of DNA. DNA is organized into our chromosomes, which are made up of t

Sladkaya [172]

Um okay so I'm not 100 percent sure so I asked Google and it said the answer is genes.

5 0

3 years ago

The equilibrium constant for the reaction 2NO2(g) N2O4(g) is Keq = . If a sample at equilibrium was found to contain 0.058 M NO2

Sladkaya [172]

Answer:

$\boxed{3.6}$

Explanation:

2NO₂ ⇌ N₂O₄

E/mol·L⁻¹: 0.058 0.012

K_{\text{eq}} = \dfrac{\text{[N$_{2}$O$_{4}$]}}{\text{[NO$_{2}$]$^{2}$}} = \dfrac{0.012}{0.058^{2}} = \mathbf{3.6} \\\\

\text{The $K_{\text{eq}}$ value would be $\boxed{\mathbf{3.6}}$}

7 0

3 years ago

What change would increase the amount of gas able to be dissolved in a given amount of liquid water?

butalik [34]

It would be the change in pressure that would <span>increase the amount of gas able to be dissolved in a given amount of liquid water. Increasing the pressure of a system would allow more gas to be dissolved into a liquid. Hope this answers the question. Have a nice day.</span>

3 0

2 years ago

Read 2 more answers

Maya made this picture to represent a chemical reaction:

natka813 [3]

Answer:

2) It is neither a synthesis reaction nor a decomposition reaction because two reactants form two products.

Explanation:

This is not a synthesis reaction, which takes place when two or more reactants combine to form one product. This is a single replacement reaction, where the cation of an ionic compound "trades places" with another element that becomes the cation in a new ionic compound.

8 0

2 years ago