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Artist 52 [7]
3 years ago
5

PLZ HELP!!! WILL GIVE BRAINLIEST!! Balance the following equations to show the law of conservation of mass: (10 points - 1 point

for each correct line)

Chemistry
1 answer:
Dafna11 [192]3 years ago
4 0
A - 1 CH4+ 1 O2 = 1 CO2+2 H2
b - 2 Al+3 Cl2 = 2 AlCl3
c - 1 CH2O+ 1 H2 = 1 CH3OH
*The ones that have the coefficient of 1 you can leave blank but if you have to put a number just put 1
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Convert 0.00000000045 to scientific notation.
marusya05 [52]

Answer:

4.5 multiplied by 10, to the -10th power.

(4.5 \times 10 { - }^{10} )

8 0
3 years ago
A mixture of 4.0g H2 (g) and He (g) in a 4.3L flask is maintained at 0°C. Determine the total pressure in the container?​
salantis [7]

Answer: 17.2 g/ml

Explanation:

4 0
3 years ago
The density of lithium is 0. 546 g/cm3. what volume is occupied by 3. 66 x 10 23 atoms of lithium?
s344n2d4d5 [400]

The volume occupied by 3.66 x 10^{23} atoms of lithium is 7.73 cm^3

<h3>What is Density?</h3>

The density of a substance is defined as the mass of the substance per unit volume. It is often denoted by the symbol ρ

The density of a substance is given by,

\rho = \frac{m}{V}

The mass of a substance is the measure of the amount of matter present in it. It is generally measured in grams (g) or kilograms (kg).

The volume of a substance is defined as the amount of 3D space occupied by it.

<h3>What is Mole Concept?</h3>

It is a concept which uses mole as a unit to measure the number of atoms, molecules or ions.

A mole is defined as the amount of substance which has the same number of elementary particles as there are atoms in 12 grams of \ce{^{12}C}

1 mole = Avogadro's number = 6.022 x 10^{23\\ atoms

<h3>Steps to find out the volume</h3>

Molar Mass of Lithium = 6.94 g/mol

1 mole of Lithium has 6.022 x 10^{23} atoms

3.66 x 10^{23} atoms of lithium has molar mass = \frac{6.94 g}{6.022\times10^{23} } \times 3.66 \times 10^{23}

m = 4.218 g

Substitute in density formula,

\rho = \frac{m}{V}

V = \frac{m}{\rho}

=\frac{4.218g}{0.546g/cm^3}

= 7.73 cm^3\\

Therefore, 3.66 x 10^{23} atoms of lithium occupies 7.73 cm^3\\ of volume.

Learn more about the mole concept:

brainly.com/question/1427235

#SPJ4

3 0
2 years ago
Balance the following equation:<br> Sg + F2 --&gt; SF
Tanzania [10]

Answer:

S+ F2 ⇒ SF

S=1

F =2

So S +F2 ......... 2SF

2S + F2 ..........2SF this is a balance equation

S=2 F=2 in left side s=2 F = 2 in rightside

Explanation:⇆

⇒

3 0
3 years ago
The average kinetic energy of 1 mole of a gas at -32 degrees Celsius is:
Yuri [45]
A IS THE CORRECT ANSWER
8 0
3 years ago
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