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
cestrela7 [59]
3 years ago
15

Potassium (K) combines with magnesium bromide (MgBr2) to form potassium bromide (KBr) and magnesium (Mg) during a chemical react

ion.
Which of the following shows the balanced chemical equation for this reaction?

a) K + MgBr2 = KBr + Mg
b) 2 K + MgBr2 → 2 KBr + Mg
c) 2 K + MgBr2 = KBr + 2 Mg
d) 2 K +2 MgBr2 = 2 KBr + 2 Mg
Chemistry
1 answer:
amm18123 years ago
5 0

Answer: option B - 2 K + MgBr2 = 2 KBr + Mg

Explanation:

2K + MgBr2 --> 2 KBr + Mg

On Left side: 2moles of Potassium (K) reacts with 1 mole of MgBr2

On Right side: 2 moles of KBr and 1 mole of Mg.

You will observe that the coefficient of each element on left side and Right side is balanced in option B, unlike other options.

So, option B is the answer.

You might be interested in
What does mass change to and what does it do
Nataly [62]

Answer:

Mass is the amount of matter in an object and does not change with location.

Explanation:

4 0
3 years ago
Determine the number of representative particles in each of the following.
klio [65]

Answer: 1. 1.59 x 10^23 Particles

2. 4.79 x 10^21 particles

3. 2.67 x 10^25 particles

4. 2.12 x 10^23 Particles

Explanation: 1mole of any substance contains 6.02x10^23 Particles

1. 0.264 mol of silver will contain = 0.264 x 6.02x10^23 = 1.59 x 10^23 Particles

2. 7.95 x 10^-3 mol sodium chloride will contain = 7.95 x 10^-3 X 6.02x10^23 = 4.79 x 10^21 particles

3. 44.4 mol carbon dioxide will contain = 44.4 x 6.02x10^23 = 2.67 x 10^25 particles

4. 0.352 mol nitrogen will contain = 0.352 x 6.02x10^23 = 2.12 x 10^23 Particles

4 0
3 years ago
While traveling along a highway a driver slows from 24 m/s to 15 m/s in 12 seconds. What is the automobile’s acceleration? (Reme
Sophie [7]
I don't get it what does m/s mean its

r= t/d Rate, time, and distance 
time 30min distance 5miles divide 30 = 6 rate is 5 miles every 6min  I think

I don't understand but that's how you calculate rate :P
7 0
3 years ago
You will first investigate 5 diatomic molecules. Diatomic molecules are made up of 2 atoms.
GenaCL600 [577]

Answer:

Here's what I get  

Explanation:

1. Fluorine

a. Each fluorine atom has seven valence electrons.

b. Fluorine is a nonmetal.

c. The combination of these atoms creates a covalent bond.

d. The atoms share a pair of valence electrons.  

e. In the ionic bond, an electron moved from one atom to the other one.

f. The molecule forms a straight line.

2. Oxygen

a. Each oxygen atom has six valence electrons.

b. Oxygen is a nonmetal.

c. The combination of these atoms creates a covalent bond.

d. The atoms share two pairs of valence electrons.  

e. The bond has four electrons instead of two.

f. The molecule forms a straight line.

8 0
3 years ago
Where does the energy come from that povrers the motion in the Earth's Interior?
zlopas [31]

Answer:

tectonic plates

Explanation:

they release a huge about of energy once shifted inside the earth's interior cause some of the things we feel like mild or big quakes

6 0
3 years ago
Other questions:
  • Which image(s) would be considered pure substances? A) V B) I and II C) II and IV D) III and V
    14·2 answers
  • Can You compost salad
    14·1 answer
  • What type of compound is always an electrolyte?
    9·2 answers
  • What is the charge of an aluminum ion? (2 points) Select one: a. 2+ b. 3+ c. 2- d. 3-
    8·1 answer
  • A. What is the solubility in grams for HCl at 40℃?
    5·1 answer
  • Which of the following items would dissolve most quickly in a glass of warm water?
    13·1 answer
  • Please help fast, I will give brainliest.
    6·2 answers
  • Compound A and compound B are constitutional isomers with molecular formula C3H7Cl. When compound A is treated with sodium metho
    15·1 answer
  • I need 2 examples of chemical and physical change. *15 points
    14·1 answer
  • Using the formula M1V1 = M2V2 , how many milliliters of a 2.50 M hydrochloric acid solution is required to make 100.0 mL of a 0.
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!