10.0 g of Mg(NO3)2 = ___

1.05 g of sodium metal is added to a 50.0 mL solution of 1.00 M hydrochloric acid solution. Sodium chloride and hydrogen gas are

olganol [36]

Answer:

Sodium chloride and hydrogen gas are the products of this reaction. If the gas collected has a pressure of 1.05 atm at 298 K, then what volume is the hydrogen

Explanation:

8 0

3 years ago

Purification of copper can be achieved by electrorefining copper from an impure copper anode onto a pure copper cathode in an el

Likurg_2 [28]

Answer: 281 hours

Explanation:-

1 electron carry charge= $1.6\times 10^{-19}C$

1 mole of electrons contain= $6.023\times 10^{23}$ electrons

Thus 1 mole of electrons carry charge= $\frac{1.6\times 10^{-19}}{1}\times 6.023\times 10^{23}=96500C$

$Cu^{2+}+2e^-\rightarrow Cu$

$96500\times 2=193000Coloumb$ of electricity deposits 1 mole or 63.5 g of copper

0.0635 kg of copper is deposited by 193000 Coloumb

11.5 kg of copper is deposited by= $\frac{193000}{0.0635}\times 11.5=34952756$ Coloumb

$Q=I\times t$

where Q= quantity of electricity in coloumbs = 34952756 C

I = current in amperes = 34.5 A

t= time in seconds = ?

$34952756 C=34.5A\times t$

$t=1013123sec=281hours$

Thus it will take 281 hours to plate 11.5 kg of copper onto the cathode if the current passed through the cell is held constant at 34.5 A.

8 0

3 years ago

. Though Florida receives a lot of rainfall, only 1 percent remains available for people to use or drink. What happens to the re

monitta

1st part.)). The rest of the water goes into oceans and underground.

8 0

3 years ago

A three-component mixture of organic compounds in diethyl ether consists of a carboxylic acid, an amine base, and a neutral comp

Dmitrij [34]

Answer:the sodium carboxylate salt

Explanation:

The reaction between the carboxylic acid and the sodium hydroxide yields a sodium carboxylate. This sodium carboxylate is an ionic in nature; RCCOO-Na+. This can effectively interact with water and remain in the aqueous phase since it is composed of the carboxylate ion and sodium ion in solution. The aqueous phase always contains water soluble ionic substances of which the sodium carboxylate is a typical example of such.

4 0

3 years ago

Which number should be placed before H20 on the products side of the equation to

timama [110]

<h2>The required balanced equation:</h2><h2> $C_3H_8 +5O_2 = 3CO_2 + 4H_2O$ </h2>

Explanation:

• Propane when reacts with oxygen it gives carbon dioxide and water.

In order to make the equation balanced at both ends of the equation,

Add 4 as a coefficient before on L.H.S (Left Hand Side) of Equation.

• Therefore, the required balanced equation is:

Propane, when added with 5 molecules of Water, yields 3 molecules of Carbon Dioxide and 4 molecules of water, as shown in the below equation -

$C_3H_8 +5O_2 = 3CO_2 + 4H_2O$

8 0

2 years ago

10.0 g of Mg(NO3)2 = ____ moles