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melisa1 [442]
3 years ago
12

1. a heart shaped mylar is filled with helium gas. the ballon holds 0.605 moles of gas when the pressure is 1.248 atm and the te

mperature is 16.1 degrees C. what is the volume of the balloon?
2. a 90.8 g sample of xenon is in a 15.7 L container. what is the pressure of this gas in mmHg 279° C?

3. when 4.85 L of methane (CH4) gas is completely burned with oxygen (O2), it produces water vapor and carbon dioxide. at a temperature of 22° C and a pressure of 135 kPa, what mass of water vapor will result?
CH4 + 2O2 > 2H2O + CO2
Chemistry
1 answer:
taurus [48]3 years ago
8 0

Answer:

Ở các đơn vị hành chính tại Việt 4 điểm Nam đều tổ chức cấp chính quyền địa phương gồm có Hội đồng nhân dân và ủy ban nhân dân. Nhận định trên đúng hay sai? Tại sao?

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Calculate the maximum solubility of silver carbonate, Ag2CO3 in g/L when in the presence of 0.057 M AgNO3. The solubility produc
Andreyy89

Answer:

Approximately 4.2 \times 10^{-7}\; \rm g \cdot L^{-1}.

Explanation:

Start by finding the concentration of \rm Ag_2CO_3 at equilibrium. The solubility equilibrium for

\rm Ag_2CO_3 \; (s) \rightleftharpoons 2\, Ag^{+}\; (aq) + {CO_3}^{2-}\; (aq).

The ratio between the coefficient of \rm Ag_2CO_3 and that of \rm Ag^{+} is 1:2. For

Let the increase in \rm {CO_3}^{2-} concentration be +x\; \rm mol \cdot L^{-1}. The increase in \rm Ag^{+} concentration would be +2\,x\; \rm mol \cdot L^{-1}. Note, that because of the 0.057\; \rm mol \cdot L^{-1}of \rm AgNO_3, the concentration of

  • The concentration of \rm Ag^{+} would be (0.057 + 2\, x) \; \rm mol\cdot L^{-1}.
  • The concentration of \rm {CO_3}^{2-} would be x\; \rm mol \cdot L^{-1}.

Apply the solubility product expression (again, note that in the equilibrium, the coefficient of \rm Ag^{+} is two) to obtain:

\begin{aligned}&\rm \left[Ag^{+}\right]^2 \cdot \left[{CO_3}^{2-}\right] = K_{\text{sp}} \\ & \implies (0.057 + x)^2\cdot x = 8.1 \times 10^{-12} \end{aligned}.

Note, that the solubility product of \rm Ag_2CO_3, K_{\text{sp}} = 8.1 \times 10^{-12} is considerably small. Therefore, at equilibrium, the concentration of

Apply this approximation to simplify (0.057 + x)^2\cdot x = 8.1 \times 10^{-12}:

0.057^2\, x \approx (0.057 + x)^2 \cdot x = 8.1 \times 10^{-12}.

\begin{aligned} x &\approx \frac{8.1 \times 10^{-12}}{0.057^2}\end{aligned}.

Calculate solubility (in grams per liter solution) from the concentration. The concentration of \rm Ag_2CO_3 is approximately \displaystyle \frac{8.1 \times 10^{-12}}{0.057^2}\; \rm mol\cdot L^{-1}, meaning that there are approximately \displaystyle n = \frac{8.1 \times 10^{-12}}{0.057^2}\; \rm mol of

\begin{aligned}m &= n \cdot M \\ &\approx \displaystyle \frac{8.1 \times 10^{-12}}{0.057^2} \; \rm mol\times 167.91\; g \cdot mol^{-1} \\ &\approx 4.2 \times 10^{-7}\; \rm g \end{aligned}.

As a result, the maximum solubility of \rm Ag_2CO_3 in this solution would be approximately 4.2 \times 10^{-7}\; \rm g \cdot L^{-1}.

8 0
3 years ago
What are the products of the chemical reaction between solutions of sodium bromide with a solution of silver nitrate?
iren2701 [21]

Answer : The products of the chemical reaction are, NaNO_3 and AgBr

Explanation :

Balanced chemical reaction : It is defined as the reaction in which the number of atoms of individual elements present on reactant side must be equal to the product side.

When sodium bromide react with silver nitrate then it react to give sodium nitrate and silver bromide as a product.

The balanced chemical reaction will be:

NaBr+AgNO_3\rightarrow NaNO_3+AgBr

The given reaction is a double-displacement reaction in which the cation of two reactants molecule exchange their places to give two different products.

The species present on the left side of the right arrow is the reactant and the species present on the right side of the right arrow is the product.

In the balanced chemical reaction,

NaBr and AgNO_3 are reactants.

NaNO_3 and AgBr are products.

Hence, the products of the chemical reaction are, NaNO_3 and AgBr

3 0
3 years ago
Carbon and oxygen combine to form carbon dioxide. What are the products, or what
Vladimir [108]
<h3>Answer:</h3>

Carbon dioxide

<h3>Explanation:</h3>
  • During chemical reactions elements or compounds that combine to form other new compounds are known as reactants
  • The newly formed compounds or molecules after a reaction has taken place are known as products.

In this case;

  • The chemical reaction between carbon and oxygen results to the formation of carbon dioxide.
  • The equation for the reaction is; C + O₂ → CO₂
  • Therefore, carbon and oxygen are the reactants while carbon dioxide is the product.
6 0
3 years ago
The free energy of ATP hydrolysis is used to maintain the concentration of Ca2 inside the cell to be constant. Calculate the num
Delicious77 [7]

Answer:

The response can be defined as follows:

Explanation:

ATP is a hydrolysis energy-saving money of the cell. It is used to support the cell's endothermic processes.

ATP\ +\ H_{2}O\ \rightleftharpoons \ ADP\ +\ P_{i}\\\\Q\ = \ \frac{[ADP][P_{i}]}{[ATP][H_{2}O]}\\\\ADP= 0.250 \ M\\\\P_i = 0.010 \ M\\\\ATP = 0.150 \ M\\\\H_2O = 55.55 \ M\\\\\Delta G \ =\ \Delta G^{o}\ +\ 2.303\ RT\ \log\ Q\\\\R = 8.314 \frac{J}{mol\ K}\\\\T = 298\  K\\\\

4 0
3 years ago
A sample of gas occupies 9.0 mL at a pressure of 500.0 mm Hg. A new volume of the same sample is at a pressure of 750.0 mm Hg.
telo118 [61]
Use the relatio P1V1=P2V2 ( p= pressure, v= volume)- assuming number of moles of gas and temperature are kept constant.

1.) A. Larger- pressure increases from 500mmHg to 750mmHg.

2.) B. Smaller

3.) B. 6.0mL
7 0
3 years ago
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