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
irina [24]
4 years ago
15

Balance the following chemical equations.

Chemistry
1 answer:
solong [7]4 years ago
3 0

Answer:

1) 2,1,2

2) 2,2,1,1

3)2,1,2

4)2,2,3

5)2,3,1,3

6 [ I cannot answer that]

7)6,1,2

You might be interested in
A 3.5 gram sample of a radioactive element was formed in a 1960 explosion of an atomic bomb at Johnson Island in the Pacific tes
Annette [7]
The answer is 0.62g.
Solution:
From year 1960 to year 2030, it has been 
     2030-1960 = 70 years

The half-life of the radioactive element is 28 years, then the sample will go through
     70 years * (1 half-life/28 years) = 2.5 half-lives

Starting with a 3.5 gram sample, we will have
     3.5*(1/2) after one half-life passes
     3.5*(1/2) * (1/2) = 3.5*(1/4) after two half-lives pass
     3.5*(1/4) * (1/2) = 3.5*(1/8) after three half-lives pass and so on

Therefore, we can write the remaining amount of the sample after the number n of half-lives have passed as
     mass of sample = initial mass of sample/2^n

The mass of the remaining sample for n = 2.5half-lives can be now calculated as
     mass of sample = 3.5 grams / 2^2.5 = 0.62 g
5 0
3 years ago
What is the mass number of an atom that contains 12 protons, 14 neutrons, and 12 electrons? *
Yuri [45]

The mass number of an atom : 26

<h3>Further explanation</h3>

Given

12 protons, 14 neutrons, and 12 electrons

Required

The mass number

Solution

Inside the atom there are 3 sub-particles, namely protons, neutrons and electrons. Protons and electrons are present in the atomic nucleus while electrons move around the atomic nucleus through energy levels in the atomic shell

Atomic number = number of protons = number of electrons

Mass number = number of protons + number of neutrons

Input the value :

Mass number = 12 + 14

Mass number = 26

7 0
3 years ago
PLEASE HELP!
Vadim26 [7]
I know all it's names,but i cann't say the value of yone in english.if u learn it to me i will help u.
8 0
3 years ago
An electric wire produces a magnetic field. <br><br><br> True or false? (GIVE PROOF)
kupik [55]

Answer:

True

Explanation:

A magnetic field is made when an electric current flows through a wire.

3 0
4 years ago
What is not produced during glycosis
a_sh-v [17]
The energy containing electron transporters of FADH2 are not produced during glycolysis.
4 0
4 years ago
Other questions:
  • Why does ice float in water?
    15·1 answer
  • It is possible for a particular element to have various numbers of neutrons. True False
    6·1 answer
  • You prepare a solution by dissolving 3.9280 g of solid sodium hydroxide in 300 mL of distilled water in a 500 mL volumetric flas
    8·1 answer
  • Which of the following statements is true during a solar eclipse?
    8·1 answer
  • Tanner adds 10 grams of dry sand to 100 milliliters of warm salt water. This mixture is stirred and placed on a table. When Tann
    10·2 answers
  • The Balmer series consists of the spectral lines from hydrogen for an electron making a transition from an excited state to the
    11·1 answer
  • When performing a gram stain, it is necessary to remove crystal violet stain from any gram negative bacteria on the slide. Micro
    13·1 answer
  • Which answer would represent 0.001 moles?
    8·1 answer
  • Question
    10·1 answer
  • Describe why the periodic table needed to be reordered in 1913.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!