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
irina1246 [14]
3 years ago
11

21.Total mass of reactants always equals the total mass of the products true or false

Chemistry
1 answer:
tia_tia [17]3 years ago
6 0

Answer:

True

Explanation:

because its the law of conservation of mass

You might be interested in
The equilibrium constant for the reaction
FinnZ [79.3K]

Answer: The concentrations of Cl_2 at equilibrium is 0.023 M

Explanation:

Moles of  Cl_2 = \frac{\text {given mass}}{\text {Molar mass}}=\frac{10g}{71g/mol}=0.14mol

Volume of solution = 1 L

Initial concentration of Cl_2 = \frac{0.14mol}{1L}=0.14M

The given balanced equilibrium reaction is,

                            COCl_2(g)\rightleftharpoons CO(g)+Cl_2(g)

Initial conc.           0.14 M           0 M       0M    

At eqm. conc.     (0.14-x) M        (x) M        (x) M

The expression for equilibrium constant for this reaction will be,

K_c=\frac{[CO]\times [Cl_2]}{[COCl_2]}

Now put all the given values in this expression, we get :

4.63\times 10^{-3}=\frac{x)^2}{(0.14-x)}

By solving the term 'x', we get :

x = 0.023 M

Thus, the concentrations of Cl_2 at equilibrium is 0.023 M

7 0
3 years ago
If you change the 2 in front of 2O2 to a 3, what will be the change in the results on the right side of the equation? (1 point)
Simora [160]

Answer:

There is an extra O2 molecule left over

Explanation:

3 0
3 years ago
What is the correct formula for combining Mg2+ and Br1+
True [87]

Answer: The correct formula is MgBr_2

Explanation:

For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.  

Here magnesium is having an oxidation state of +2 called as Mg^{2+} cation and bromine Br^{-} is an anion with oxidation state of -1. Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral MgBr_2.

The cations and anions being oppositely charged attract each other through strong coloumbic forces and form an ionic bond.

6 0
2 years ago
Calculate the pH of a 3.58x10^-9 M Nitric acid (a strong acid) solution
lubasha [3.4K]

Answer:

pH= 8.45

Explanation:

when working with strong accids pH = -log(Concentration)

so -log(3.58e-9) = 8.446

7 0
3 years ago
PLEASE HELP WITH EASY 8th GRADE SCIENCE!!
atroni [7]
I think c is the right answer
8 0
3 years ago
Read 2 more answers
Other questions:
  • Describe Bohr's contribution to the atomic model.<br><br> Enter your answer in the space provided.
    11·1 answer
  • How many neutrons are in Cesium-130 (Cs)?<br><br> 55<br> 75<br> 130<br> 185
    14·1 answer
  • Why does the study of science have limitations
    5·1 answer
  • A student tested a 0.1 M aqueous solution and made the following observations:
    7·1 answer
  • If an individual is eating a diet in which 25% of their ATP production is a result of utilizing carbohydrates, 50% of their ATP
    13·1 answer
  • Give the approximate bond angle for a molecule with an octahedral shape.
    7·1 answer
  • Why are infants and children often more susceptible to the effects of toxic substances than adult? (Explain)
    10·1 answer
  • What are the units of density
    15·1 answer
  • HELP ME WITH THIS PLSSSSS
    8·1 answer
  • PLLLEEEAAASEEEE ANSWER QUICK. WHOEVER IS FAST AND RIGHT GETS BRAINLY
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!