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3 years ago

Write a balanced chemical equation for the standard formation reaction of gaseous hydrogen cyanide HCN .

Chemistry

2 answers:

Marizza181 [45]3 years ago

8 0

I would use the following reaction:

CH4 + NH3 = HCN + 3H2

I hope this helps!

nikklg [1K]3 years ago

7 0

Answer : The balanced chemical equation will be,

$\frac{1}{2}H_2(g)+\frac{1}{2}N_2(g)+C(s,graphite)\rightarrow HCN(g)$

Explanation :

Standard formation of reaction : It is a chemical reaction that forms one mole of a substance from its constituent elements in their standard states.

The hydrogen cyanide (HCN) is formed by the combination of hydrogen, carbon and nitrogen.

The balanced chemical equation for the standard formation reaction of gaseous hydrogen cyanide will be,

$\frac{1}{2}H_2(g)+\frac{1}{2}N_2(g)+C(s,graphite)\rightarrow HCN(g)$

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A chemist must prepare 300.0mL of nitric acid solution with a pH of 0.70 at 25°C. He will do this in three steps: Fill a 300.0mL

d1i1m1o1n [39]

<u>Answer:</u> The volume of concentrated solution required is 9.95 mL

<u>Explanation:</u>

To calculate the pH of the solution, we use the equation:

$pH=-\log[H^+]$

We are given:

pH = 0.70

Putting values in above equation, we get:

$0.70=-\log[H^+]$

$[H^+]=10^{-0.70}=0.199M$

1 mole of nitric acid produces 1 mole of hydrogen ions and 1 mole of nitrate ions.

Molarity of nitric acid = 0.199 M

To calculate the volume of the concentrated solution, we use the equation:

$M_1V_1=M_2V_2$

where,

$M_1\text{ and }V_1$ are the molarity and volume of the concentrated nitric acid solution

$M_2\text{ and }V_2$ are the molarity and volume of diluted nitric acid solution

We are given:

$M_1=7.0M\\V_1=?mL\\M_2=0.199M\\V_2=350mL$

Putting values in above equation, we get:

$7.0\times V_1=0.199\times 350.0\\\\V_1=\frac{0.199\times 350}{7.0}=9.95mL$

Hence, the volume of concentrated solution required is 9.95 mL

6 0

3 years ago

Help please

Lana71 [14]

Answer:

Yes

Explanation:

Based on the graph, nuclear energy is one of the least contributors of CO2 emissions.

You would support this source of energy .

8 0

3 years ago

What two substances are always produced by a neutralization reaction?

satela [25.4K]

What two substances are always produced by a neutralization reaction? water and salt

8 0

3 years ago

The density of lava is 3.1 g/cm². It has a volume of 2700 cm3. How much does this block of lava weigh?

konstantin123 [22]

Answer:

Mass of lava is 8370 g.

Explanation:

Density:

Density is equal to the mass of substance divided by its volume.

Units:

SI unit of density is Kg/m3.

Other units are given below,

g/cm3, g/mL , kg/L

Formula:

D=m/v

D= density

m=mass

V=volume

Symbol:

The symbol used for density is called rho. It is represented by ρ. However letter D can also be used to represent the density.

Given data:

density of lava = 3.1 g/cm³

volume= 2700 cm³

mass= ?

Solution:

d = m/v

m = d×v

m = 3.1 g/cm³×2700 cm³

m = 8370 g

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3 years ago

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Anit [1.1K]

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3 years ago