1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Reika [66]
3 years ago
9

What is the mass number of an atom that has 12 neutrons and 11 protons?

Chemistry
2 answers:
TiliK225 [7]3 years ago
8 0

Answer:

23

Explanation:

Tamiku [17]3 years ago
5 0
Mass number = protons + neutrons. 12 + 11 = 23.
You might be interested in
___AsCl3+____H2S-->___As2S3+___HCI​
Alex17521 [72]

Answer:

2 AsCl₃ + 3 H₂S → As₂S₃ + 6 HCl

Explanation:

When we balance a chemical equation, what we are trying to do is to achieve the same number of atoms for each element on both sides of the arrow. On the right of the arrow is where we can find the products, while the reactants are found on the left of the arrow.

We usually balance O and H atoms last.

AsCl₃ + H₂S → As₂S₃ +HCl

<u>reactants</u>

As --- 1

Cl --- 3

H --- 2

S --- 1

<u>products</u>

As --- 2

Cl --- 1

H --- 1

S --- 3

2 AsCl₃ + H₂S → As₂S₃ +HCl

<u>reactants</u>

As --- 2

Cl --- 6

H --- 2

S --- 1

<u>products</u>

As --- 2

Cl --- 1

H --- 1

S --- 3

The number of As atoms is now balanced.

2 AsCl₃ + 3 H₂S → As₂S₃ +HCl

<u>reactants</u>

As --- 2

Cl --- 6

H --- 6

S --- 3

<u>products</u>

As --- 2

Cl --- 1

H --- 1

S --- 3

The number of S atoms is now equal on both sides.

2 AsCl₃ + 3 H₂S → As₂S₃ + 6 HCl

<u>reactants</u>

As --- 2

Cl --- 6

H --- 6

S --- 3

<u>products</u>

As --- 2

Cl --- 6

H --- 6

S --- 3

The equation is now balanced.

3 0
2 years ago
Is glass biotic or abiotic
zhuklara [117]
Glass is not a living organism, so it is <u>abiotic</u>.
4 0
3 years ago
Read 2 more answers
Calculate the wavelength of light with a frequency of 1.89 x 1018 Hz.
Charra [1.4K]
Which sentence from "Black Hole Beginnings" contains a cause-and-effect relationship?
More matter mounts up on the outside, increasing the pressure on the inside.
Instead it is a dramatic melding, or blending, of atoms, called nuclear fusion.
Each atom has its own tiny center, or nucleus.
Surrounding each nucleus is an electrical force field..
6 0
3 years ago
What is the function of a lyase enzyme?
elena55 [62]

Answer:

c. To facilitate a reaction of one substrate to form two products without the use of water

Explanation:

A lyase is an enzyme that catalyzes - accelerates the chemical reaction - in which a substrate is broken into two molecules. The reaction does not involve hydrolysis or oxidation, so the water molecule is not included in the chemical reaction. Thus, the enzyme facilitates the reaction in which a molecule (substrate) is decomposed into two molecules with the elimination of chemical bonds.

5 0
3 years ago
Answer on both of them please
aliya0001 [1]
1. Intensive.

2. Physical. 

Hope this helps. :)
3 0
3 years ago
Other questions:
  • Is water wet?with evidence
    12·2 answers
  • Determine whether the statement is true or false, and why? “Climate change could cause many habitats to be destroyed, leading to
    7·1 answer
  • What is Mendeleev most known for?
    8·1 answer
  • Hello, I need help with a CER about Why do so many earthquakes occur along the west coast of the United States?
    9·1 answer
  • What is a diatomic molecule​
    5·1 answer
  • To use the gas law constant R = 0.0821, the unit for temperature should be Kelvin and the unit for volume should be milliliters.
    8·2 answers
  • What’s the balanced equation of sodium hydroxide + carbon dioxide produces sodium carbonate + water?
    15·1 answer
  • What does the bottom number within each box of the periodic table refer to? How can it be used to determine the number of neutro
    11·1 answer
  • The atomic number of an element configuration 2,8, 8,2,13​
    12·1 answer
  • How many minutes would be required to produce a mass of 6. 38 g al using a current of 12. 50 amps?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!