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lawyer [7]
3 years ago
5

Element oxygen

Chemistry
1 answer:
puteri [66]3 years ago
7 0

Answer:

sjsjsnsjsksiiw the first the best way I can be used for

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12.Use the equation below to determine the maximum number of grams of PH3 that can be formed when 8.2 g of phosphorus reacts wit
-BARSIC- [3]

Answer : The maximum number of grams of PH_3 formed is, 8.955 g

Solution : Given,

Mass of phosphorous = 8.2 g

Mass of hydrogen = 4 g

Molar mass of P_4 = 123.6 g/mole

Molar mass of H_2 = 2.016 g/mole

Molar mass of PH_3 = 33.924 g/mole

The balanced chemical reaction is,

P_4(s)+6H_2(g)\rightarrow 4PH_3(g)

First we have to calculate the moles P_4 and H_2

\text{ Moles of }P_4=\frac{\text{ Mass of }P_4}{\text{ Molar mass of }P_4}=\frac{8.2g}{123.6g/mole}=0.066moles

\text{ Moles of }H_2=\frac{\text{ Mass of }H_2}{\text{ Molar mass of }H_2}=\frac{4g}{2.016g/mole}=1.98moles

From the reaction, we conclude that

1 mole of P_4 react with 6 moles of H_2

0.066 moles of P_4 react with 6\times 0.066=0.396 moles of H_2

That means the H_2 is in excess amount and P_4 is in limited amount.

Now we have to calculate the moles of PH_3.

As, 1 mole of P_4 react to give 4 moles of PH_3

So, 0.066 moles of P_4 react to give 4\times 0.066=0.264 moles of PH_3

Now we have to calculate the mass of PH_3

\text{ Mass of }PH_3=\text{ Moles of }PH_3\times \text{ Molar mass of }PH_3

\text{ Mass of }PH_3=(0.264moles)\times (33.924g/mole)=8.955g

Therefore, the maximum number of grams of PH_3 formed is, 8.955 g

5 0
3 years ago
In a sample of 400 lithium atoms, it is found that 30 atoms are lithium-6 (6.015 amu) and
Diano4ka-milaya [45]

Answer:

667.3

Explanation:

7 0
3 years ago
When a solution of NaI reacts with a solution of AgNO3, what is the net ionic equation?
Leni [432]

Answer:

Ag⁺(aq) + I⁻(aq) → AgI(s)

Explanation:

Net ionic equation is a way to write a chemical equation in which you are listing only the species that are participating in the reaction.

In the reaction:

AgNO₃(aq) + NaI(aq) → AgI(s) + NaNO₃(aq).

The ionic equation is:

Ag⁺(aq) + NO₃⁻(aq) + Na⁺(aq) + I⁻(aq) → AgI(s) + Na⁺(aq) + NO₃⁻(aq).

Now, listing only the species that are participating in the reaction:

<h3>Ag⁺(aq) + I⁻(aq) → AgI(s)</h3>

3 0
4 years ago
which two will help you measure how different colors absorb the energy in sunlight is it beaker or thermometer
KATRIN_1 [288]
Beaker does thermometer measures the thermal energy in the air
6 0
4 years ago
Why does a reaction slow down with time?
nignag [31]

Answer:

D. The reactant concentrations decrease.

5 0
3 years ago
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