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3 years ago

11

According to the law of conservation of mass, what is the same on both sides of a balanced chemical equation?

1 answer:

Firlakuza [10]3 years ago

8 0

According to the law of conservation of mass, what is the same on both sides of a balanced chemical equation?

A. the volume of the substances

B. the subscripts

C. the total mass of atoms

D. the coefficients

Answer:

A balanced equation demonstrates the conservation of mass by having the same number of each type of atom on both sides of the arrow.

Explanation:

Every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. ... Use coefficients of products and reactants to balance the number of atoms of an element on both sides of a chemical equation.

Consider the balanced equation for the combustion of methane.

CH

4

+

2O

2

→

CO

2

+

2H

2

O

All balanced chemical equations must have the same number of each type of atom on both sides of the arrow.

In this equation, we have 1

C

atom, 4

H

atoms, and 4

O

atoms on each side of the arrow.

The number of atoms does not change, so the total mass of all the atoms is the same before and after the reaction. Mass is conserved.

Here is a video that discusses the importance of balancing a chemical equation.

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The table lists properties of a few known elements, but the states of matter and melting points are missing. Look up the element

kolbaska11 [484]

The properties of the given elements are as follows:

Potassium, K;

State of matter: Solid
Melting point: 63.5 °C
Conductivity: Good
Solubility (H2O): reacts rapidly with water

Iodine, I;

State of matter: solid
Melting point: 113.5 °C
Conductivity: very poor
Solubility (H2O): negligible

Gold, Au;

State of matter: solid
Melting point: 1064 °C
Conductivity: excellent
Solubility (H2O): none

Germanium, Ge;

State of matter: solid
Melting point: 938.2 °C
Conductivity: fair
Solubility (H2O): none

Barium, Ba;

State of matter: solid
Melting point: 727 °C
Conductivity: good
Solubility (H2O): reacts strongly

Argon, Ar;

State of matter: gas
Melting point: -189.4 °C
Conductivity: none
Solubility (H2O): negligible

Chlorine Cl;

State of matter: gas
Melting point: -101.5 °C
Conductivity: poor
Solubility (H2O): slight

Rubidium, Rb;

State of matter: solid
Melting point: 39.48 °C
Conductivity: good
Solubility (H2O): reacts violently

Silver, Ag;

State of matter: solid
Melting point: 961.8 °C
Conductivity: excellent
Solubility (H2O): none

Calcium, Ca;

State of matter: solid
Melting point: 842 °C
Conductivity: good
Solubility (H2O): reacts

Silicon, Si;

State of matter: solid
Melting point: 1,410 °C
Conductivity: intermediate
Solubility (H2O): none

Xenon, Xe;

State of matter: gas
Melting point: -111.8 °C
Conductivity: very poor
Solubility (H2O): none

<h3>What are elements?</h3>

Elements are pure substances which are composed of similar atoms.

Elements are defined as substances which cannot be split into simpler substances by an ordinary chemical process.

Elements have different physical and chemical properties and can be classified into:

metals
semi-metals
non-metals

In conclusion, the physical and chemical properties of the elements vary from metals to non-metals.

Learn more about elements at: brainly.com/question/6258301

#SPJ1

7 0

1 year ago

Which class of biomolecule do the molecules in the table belong to?

kondaur [170]

The oythagorean theroem

8 0

3 years ago

g All of the molecules below have polar bonds but only one of the molecules is a polar molecule. Which one is a polar molecule?

lbvjy [14]

Answer: $NF_3$

Explanation:

Geometrical symmetry of the molecule and the polarity of the bonds determine the polarity of the molecule.

The molecule that has zero dipole moment that means it is a geometrically symmetric molecule and the molecule which has some net dipole moment means it is a geometrically asymmetric molecule.

As the molecule is symmetric, the dipole moment will be zero as dipole moments cancel each other and the molecule will be non-polar.

As the molecule is asymmetric, the dipole moment will not be zero and the molecule will be polar.

Example: $NF_3$

Thus, we can say that $NF_3$ is a polar molecule.

4 0

3 years ago

A city's water supply is contaminated with a toxin at a concentration of 0.63 mg/L. For the water to be safe for drinking, the c

Shalnov [3]

Answer:

Approximately 22.37 days, will it take for the water to be safe to drink.

Explanation:

Using integrated rate law for first order kinetics as:

$[A_t]=[A_0]e^{-kt}$

Where,

$[A_t]$ is the concentration at time t

$[A_0]$ is the initial concentration

k is rate constant

Given that:- k = 0.27 (day)⁻¹

$[A_0]$ = 0.63 mg/L

$[A_t]=1.5\times 10^{-3}$ mg/L

Applying in the above equation as:-

$1.5\times 10^{-3}=0.63e^{-0.27\times t}$

$63e^{-0.27t}=150\times \:10^{-3}$

$e^{-0.27t}=\frac{1}{420}$

$t=\frac{100\ln \left(420\right)}{27}=22.37$

<u>Approximately 22.37 days, will it take for the water to be safe to drink.</u>

7 0

3 years ago

I need help what is s-1/3=7/9???? please help guys and thank you

nalin [4]

Answer:

10/9

Explanation:

First, let's convert 1/3 and 7/9 so that the have the same denominator. To do this let's find the least common multiple of 3 and 9.

List the multiples of 3 and 9:

3: 3, 9

9: 9

They have a least common multiple of 9

We need to convert 1/3 so it has a denominator of 9:

1/3*3/3 (we can multiply it by 3/3 because any number over itself is 1) = 3/9

s-3/9=7/9

Add 3/9 to both sides to isolate s

s=10/9

6 0

2 years ago