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
sammy [17]
3 years ago
12

Calcium metal reacts with fluorine gas to form solid calcium fluoride. When the reaction is balanced, what coefficient is in fro

nt of fluorine gas?
A. 1
B. 2
C. 7
D. 3
Chemistry
1 answer:
Novosadov [1.4K]3 years ago
8 0

Answer:

B= 2

Explanation:

Chemical equation:

Ca + F      →   CaF₂  

Balance chemical equation:

Ca + 2F      →   CaF₂  

Step 1:

Ca + F      →   CaF₂

Left hand side             right hand side

Ca = 1                             Ca = 1

F = 1                                F = 2

Step 2:

Ca + 2F      →   CaF₂

Left hand side             right hand side

Ca = 1                             Ca = 1

F =  2                              F = 2

You might be interested in
a mixture of carbon and sulfur has a mass of 9.0 g. complete combustion with excess o2 gives 22.5 g of a mixture of co2 and so2.
photoshop1234 [79]
S + O2 → SO2 
<span>z / (32.0655 g S/mol) x (1 mol SO2 / 1 mol S) x (64.0638 g SO2/mol) = (1.9979 z) g SO2 </span>

<span>C + O2 → CO2 </span>
<span>(9.0-z) / (12.01078 g C/mol) x (1 mol CO2 / 1 mol C) x (44.00964 g CO2/mol) = (32.9776 - 3.66418 z) g CO2 </span>

<span>Add the two masses of SO2 and CO2 and set them equal to the amount given in the problem: </span>
<span>(1.9979 z) + (32.9776 - 3.66418 z) = 27.9 </span>
<span>Solve for z algebraically: </span>
<span>z = 3.0 g S</span>
7 0
3 years ago
When one metal mixes into the crystalline lattice of another it is called a(n) alloy compound chemical reaction heterogeneous so
bekas [8.4K]

the correct answer is alloy

6 0
3 years ago
What happens when chemical bonds break and new bonds form
zheka24 [161]

Answer:

Chemical reactions make and break the chemical bonds between molecules, resulting in new materials as the products of the chemical reaction.

Explanation:

Breaking chemical bonds absorbs energy, while making new bonds releases energy, with the overall chemical reaction being endothermic or exothermic.

5 0
3 years ago
What is the mass, in grams, of one mole of any substance known as?
Mashutka [201]

The answer is B. the molar mass.

The molar mass of a chemical compound is defined as the mass of a sample of that compound divided by the amount of substance in that sample, measured in moles.

4 0
2 years ago
Read 2 more answers
Which of these is NOT a falsifiable hypothesis?
pashok25 [27]
D) life on earth was seeded by extraterrestrial aliens

4 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following is true of a heterogeneous mixture?
    13·2 answers
  • Which principles help geologists compare the timing of the origin of life forms and the timing of their extinction?
    13·2 answers
  • In a chemical reaction how does the mass of the reactants compare with the mass of the products?
    7·1 answer
  • 1. What is the reactant in alcoholic and lactic-acid fermentation?
    5·1 answer
  • I need help please &lt;33
    14·1 answer
  • please explain why boiling point melting are not considered chemical properties but are considered physical properties of matter
    8·1 answer
  • IV. Provide the chemical Name of below acid or base.
    6·1 answer
  • Someone plz help me !!<br><br> Science <br> Or<br> Bias?
    12·1 answer
  • Example of each class of polydentate ligands
    14·1 answer
  • What environment will produce the largest crystal sizes?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!