What is the h+ oh- and poh of solution with ph=3.67

A 100.0-mL flask contains 0.193 g of a volatile oxide of nitrogen. The pressure in the flask is 760 mmHg at 17°C. Is the gas NO,

cestrela7 [59]

Answer:

$NO_2$

Explanation:

Considering,

$n=\frac{m}{M}$

Using ideal gas equation as:

$PV=\frac{m}{M}RT$

where,

P is the pressure = 760 mmHg

V is the volume = 100.0 mL = 0.1 L

m is the mass of the gas = 0.193 g

M is the molar mass of the gas = ?

Temperature = 17 °C

The conversion of T( °C) to T(K) is shown below:

T(K) = T( °C) + 273.15

So,

T = (17 + 273.15) K = 290.15 K

R is Gas constant having value = 62.36367 L. mmHg/K. mol

Applying the values as:-

$760\times 0.1=\frac{0.193}{M}\times 62.36367\times 290.15$

M = 45.95 g/mol

This mass corresponds to $NO_2$ . Hence, the gas must be $NO_2$ .

7 0

3 years ago

Which of the following is an example of a way you can reduce personal consumption of resources?

dsp73

Answer:

B. using efficient light bulbs

4 0

3 years ago

Which type of energy is represented here? A. Thermal B. Chemical potential C. Mechanical D. Electromagnetic

Snezhnost [94]

<h2>Answer:</h2>

<u>The correct answer is Thermal Energy</u>

<h2>Explanation:</h2>

Thermal energy is the energy that comes from heat. This heat is generated by the movement of tiny particles within an object. The faster these particles move, the more heat is generated. Since the matchstick produces heat energy and heat is referred o thermal energy so it is the correct answer.

4 0

3 years ago

Read 2 more answers

What is the h oh ph and poh of a 0.005m solution of calcium hydroxide?

fiasKO [112]

Answer: $[OH^{-}]= 0.01M or 1.0\times 10^{-2}M$

$[H^{+}]= 1.0\times 10^{-12}M$

pH = 12

pOH = 2

Explanation: Calcium hydroxide ( $Ca(OH)_{2}$ ) is a strong base that dissociates completely.

Dissociation equation of Calcium hydroxide is :

$Ca(OH)_{2} \rightarrow Ca^{+2} + 2OH^{-}$

1. Concentration of [OH-]

1 mol $Ca(OH)_{2}$ produces 2 mol OH- ions.

The given solution is 0.005M $Ca(OH)_{2}$ , then concentration of OH- would be twice the concentration of $Ca(OH)_{2}$

$[OH^{-}] = 0.005\times 2$ = 0.01M or $1.0\times 10^{-2}M$

2.Concentration of [H+]

Concentration of [H+] can be calculated by the formula: $[H^{+}] = \frac{Kw}{[OH^{-}]}$

kw = ionic product of water and its values is $(1\times 10^{-14})$

[OH-] = 0.01 M or $1.0\times 10^{-2}M$

$[H^{+}] = \frac{(1\times 10^{-14})}{[OH^{-}]}$

$[H^{+}] = \frac{(1\times 10^{-14})}{[0.01]}$

$[H^{+}] = 1.0\times 10^{-12}M$

3. pH value

pH is calculated by the formula : $pH = -log[H^{+}]$

$pH = -log[1.0\times 10^{-12}]$

pH = 12

4. pOH value

pOH is calculated by the formula : pOH = 14 - pH

pOH = 14 - 12

pOH = 2

pOH can also be calculated by using a different formula which is :

$pOH = -log(OH^{-})$

$pOH = -log(0.01)$

pOH = 2.

3 0

3 years ago

CH4+ 2O2>CO2 + 2H2O

Karolina [17]

Answer:

The given reaction is combustion reaction heat is also produced.

Explanation:

Chemical equation:

CH₄ + 2O₂ → CO₂ + 2H₂O

The given reaction is combustion of methane. When methane burn it produced water and carbon dioxide. Heat is also produced.

The given reaction followed the law of conservation of mass.

Law of conservation of mass:

According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.

Explanation:

This law was given by french chemist Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.

CH₄ + 2O₂ → CO₂ + 2H₂O

There are equal number of carbon hydrogen and oxygen atoms present on both side of equation. So it follow the law of conservation of mass.

4 0

4 years ago