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4 years ago

The number of protons plus neutrons in the atom is called its?

Chemistry

2 answers:

Olegator [25]4 years ago

7 0

The mass number is protons plus neutrons

yKpoI14uk [10]4 years ago

5 0

This is the thing called the mass number of the thing

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How to tell the difference between ionic and covalent bonding?

Ilia_Sergeevich [38]

Covalent bonding is the sharing of electrons while ionic bonding is the transferring of electrons.

4 0

3 years ago

The combustion of ammonia produces NO and water. If the chemical reaction for this process is properly balanced using the smalle

cestrela7 [59]

Answer:

Explanation:

The unbalanced combustion reaction is shown below as:-

$NH_3+O_2\rightarrow NO+H_2O$

On the left hand side,

There are 3 hydrogen atoms and 1 nitrogen atom and 2 oxygen atoms

On the right hand side,

There are 1 nitrogen atom and 2 hydrogen atoms and 2 oxygen atoms

Thus,

Right side, $H_2O$ must be multiplied by 6 to balance hydrogen.

Left side, $NH_3$ must be multiplied by 4 to balance hydrogen.

Also, Right side, $NO$ is multiplied by 4 so to balance nitrogen.

Left side, $O_2$ must be multiplied by 5 to balance the whole reaction.

Thus, the balanced reaction is:-

$4NH_3+5O_2\rightarrow 4NO+6H_2O$

Sum of Coefficient of product - 4 + 6 = 10

6 0

3 years ago

Which list below contains only renewable resources

gulaghasi [49]

- Tidal Energy

- Biomass Energy

- Solar Energy

- Wind Energy

- Hydropower

-Ocean Thermal Energy

- Biogas

-Geothermal Energy

-Air

-water

-wood

Explanation:

renewable resources are the natural resources which will help to replace the portion got deplete. These resources will fill up the gaps by any recurring processes or any natural process in a finite time.

Most of the renewable resources are part of the earth’s ecosphere and considered as part of the earth's natural environment.

water is technically a renewable resource because it can use over and over but the sustainability of this renewable resource is a question.

5 0

3 years ago

How many grams of sodium acetate ( molar mass = 83.06 g/mol ) must be added to 1.00 Liter of a 0.200 M acetic acid solution to m

Pie

Answer: The mass of sodium acetate that must be added is 30.23 grams

Explanation:

To calculate the number of moles for given molarity, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Moles of solute}}{\text{Volume of solution (in L)}}$

Molarity of acetic acid solution = 0.200 M

Volume of solution = 1 L

Putting values in above equation, we get:

$0.200M=\frac{\text{Moles of acetic acid}}{1L}\\\\\text{Moles of acetic acid}=(0.200mol/L\times 1L)=0.200mol$

To calculate the pH of acidic buffer, we use the equation given by Henderson Hasselbalch:

$pH=pK_a+\log(\frac{[\text{salt}]}{[\text{acid}]})$

$pH=pK_a+\log(\frac{[CH_3COONa]}{[CH_3COOH]})$

We are given:

$pK_a$ = negative logarithm of acid dissociation constant of acetic acid = 4.74

$[CH_3COONa]=?mol$

$[CH_3COOH]=0.200mol$

pH = 5.00

Putting values in above equation, we get:

$5=4.74+\log(\frac{[CH_3COONa]}{0.200})$

$[CH_3COONa]=0.364mol$

To calculate the mass of sodium acetate for given number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Molar mass of sodium acetate = 83.06 g/mol

Moles of sodium acetate = 0.364 moles

Putting values in above equation, we get:

$0.364mol=\frac{\text{Mass of sodium acetate}}{83.06g/mol}\\\\\text{Mass of sodium acetate}=(0.364mol\times 83.06g/mol)=30.23g$

Hence, the mass of sodium acetate that must be added is 30.23 grams

7 0

3 years ago

How many grams are there in 9.4x10^25 molecules of H2

Arisa [49]

Answer:

You start with 9.4 x 1025 molecules of H2.

You know that an Avogadro's number of molecules of H2 has a mass of 2.0 g.

To solve, 9.4 x 1025 molecules H2 x (2.0 g H2 / 6.023 x 1023 molecules H2) = 312. g H2

Explanation:

7 0

3 years ago