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
pogonyaev
3 years ago
8

An atom has a mass number of 25 and 13 neutrons. what is the atomic number of this atom? express your answer as an integer.

Chemistry
1 answer:
Snowcat [4.5K]3 years ago
5 0
13 because an atom has the same number of protons as neutrons
You might be interested in
You are confronted by a phosphorus atom. this atom has 15 protons and 17 neutrons. how many electrons does it have
bogdanovich [222]
15 electrons if it is not an ion

8 0
3 years ago
Read 2 more answers
A weak acid (ha) has a pka of 4.001. If a solution of this acid has a ph of 4.110, what percentage of the acid is not ionized? (
OverLord2011 [107]

99.9224 % of the acid is not ionized.

____HA + H₂O ⇌ A⁻ + H₃O⁺

I: ___<em>c</em> ________0 ____0  

C: _-α<em>c</em> _______+α<em>c</em> __+α<em>c </em>

E: <em>c</em>(1-α) _______α<em>c</em> ___α<em>c </em>

pH = 4.110

[H₃O⁺] = α<em>c</em> = 10^(-4.110) mol/L = 7.76 × 10⁻⁵ mol/L

α = 7.76 × 10⁻⁵

1 – α = 1 - 7.76 × 10⁻⁵ = 0.999 224 = 99.9224 %

7 0
3 years ago
The first stage of aerobic respiration is a series of biochemical reactions called the Calvin cycle.
Marina CMI [18]

Answer:

The answer is indeed true

Explanation:

8 0
3 years ago
if the density of copper is 8.9g/cm^3 and the Volume of the sample is 23.4 mL what would be the mass? ​
Black_prince [1.1K]

Answer:

The mass of copper = 208.26 grams.

Explanation:

Density = mass / volume

8.9 = mass / 23.4

mass = 8.9 * 23.4

= 208.26 grams.

8 0
3 years ago
Rock and sand are non-living.all organisms are ____
Sladkaya [172]
Rock and sand are non-living. All organisms are living.
7 0
3 years ago
Read 2 more answers
Other questions:
  • How does knowing the reactants and products help you classify a chemical reaction?
    5·2 answers
  • Definition: This is an important principle of the scientific method in which an experiment can accurately be reproduced by an in
    11·1 answer
  • In one sample of a compound of copper and oxygen, 3.12g of the compound contains 2.50g of copper and the remainder is oxygen. Ca
    7·1 answer
  • How many electrons does calcium hace?
    13·1 answer
  • What is the molecular geometry of H2O?
    15·1 answer
  • Which of the following is the SI unit used to measure mass? a. kilogram b. liter c. meter d. Kelvin Please select the best answe
    12·1 answer
  • What is the final product of transcription?
    7·1 answer
  • Hot water is poured into four cups made of different materials (foam, glass, metal, plastic).After one minute, which will feel t
    8·2 answers
  • Please help I want the answer
    7·1 answer
  • What must occur in order for a chemical reaction to be specifically classified as endothermic instead of exothermic?
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!