All categories

3 years ago

What is the coefficient in a chemical equation

Chemistry

2 answers:

GarryVolchara [31]3 years ago

8 0

A coefficient is the number or letter before the variable. The variable is the unknown value.

Savatey [412]3 years ago

4 0

In a chemical equation, the coefficient means the moles of the molecule.

For example:2H2O means 2 moles of H2O

You might be interested in

The average atomic mass of a sample of an element X is 16.2u. What are the percentages of isotopes X (mass number 16, atomic num

belka [17]

Answer:

isotopes of hydrogen are protium,deuterium and tritium

8 0

2 years ago

HELP!!! What is the key to sustainability of natural resources? A. using as many renewable resources as possible. B. obtaining n

tensa zangetsu [6.8K]

managing resources so they are not overused.

7 0

2 years ago

A 75 Kg skateboarder is riding downhill, exerting 25 N. What is their acceleration?

Hunter-Best [27]

Answer:

<h3>The answer is 0.33 m/s²</h3>

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

$a = \frac{f}{m} \\$

where

m is the mass

f is the force

a is the acceleration

From the question

f = 25 N

m = 75 kg

We have

$a = \frac{25}{75} = \frac{1}{3} \\ = 0.333333333...$

We have the final answer as

Hope this helps you

4 0

2 years ago

method to measure soluble organic carbon in seawater includes oxidation of the organic materials to CO2 with K2S2O8, followed by

dusya [7]

Answer:

The ppm carbon in the seawater is 104.01.

Explanation:

Mass of seawater = 6.234 g

Mass of carbon dioxide gas produced = 2.378 mg = 0.002378 g

1 mg = 0.001 g

Moles of carbon dioxide gas = $\frac{0.002378 g}{44.009 g/mol}=5.4034\times 10^{-5} mol$

1 mol of carbon dioxde gas has 1 mole pf carbon atoms,then $5.4034\times 10^{-5} mol$ will have ;

$1\times 5.4034\times 10^{-5} mol=5.4034\times 10^{-5} mol$ of carbon

Mass of $5.4034\times 10^{-5} mol$ of carbon ;

$12 g/mol\times 5.4034\times 10^{-5} mol=0.0006484 g$

To calculate the ppm of oxygen in sea water, we use the equation:

$\text{ppm}=\frac{\text{Mass of solute}}{\text{Mass of solution}}\times 10^6$

(Both the masses are in grams)

$=\frac{0.0006484 g}{ 6.234 g}\times 10^6=104.01 ppm$

The ppm carbon in the seawater is 104.01.

7 0

3 years ago

1.50 × 104 J of energy is transferred thermally into a huge tank filled with liquid water. The water temperature remains constan

posledela

Answer:

53j/k

Explanation:

ΔH = TΔS => ΔS = ΔH/T = 1.5 x 10⁴ joules/283 Kelvin = 53 joules/K

3 0

3 years ago