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
Rzqust [24]
3 years ago
5

3.

Chemistry
2 answers:
lorasvet [3.4K]3 years ago
7 0

Hey there!

CaCO₃ + HCl → CaCl₂ + CO₂ + H₂O

We have to balance Ca, C, O, Cl, and H.  

Let's balance H.

One on the left, two on the right. Add a coefficient of 2 in front of HCl.

CaCO₃ + 2HCl → CaCl₂ + CO₂ + H₂O  

Balance Ca.

One on the left, one on the right. Already balanced.

Balance C.

One on the left, one on the right. Already balanced.

Balance O.

Three on the left, three on the right. Already balanced.

Balance Cl.

Two on the left, two on the right. Already balanced.

Our final balanced equation:

CaCO₃ + 2HCl → CaCl₂ + CO₂ + H₂O

The answer is C. 1; 2; 1; 1; 1.

Hope this helps!

Harlamova29_29 [7]3 years ago
3 0

Answer:

C.)

Explanation:

You might be interested in
C. Another radioisotope of americium exists which has an atomic mass of 242.
ollegr [7]

Answer:

1 g  

Explanation:

The half-life of Am-242 (16 h) is the time it takes for half of it to disappear.

We can make a table of the mass left after each half-life.

\begin{array}{cccc}\textbf{No. of} & & \textbf{Percent} & \textbf{Mass}\\\textbf{Half-lives} & \textbf{Time/h} & \textbf{Remaining} & \textbf{Remaining/g}\\0& 0 & 100 & 8\\1 & 16 &50 & 4\\2 & 32 & 25 & 2\\3 & 48 & 12.5 & 1\\4 & 64 & 6.25 & 0.5\\\end{array}

The mass remaining after 48 h  is 1 g.

7 0
3 years ago
The molar mass of an unknown gas was measured by an effusion experiment. It was found that it took 60 s for the gas to effuse, w
Marizza181 [45]

Answer:

The molar mass of the gas is 44 g/mol

Explanation:

It is possible to solve this problem using Graham's law that says: Rates of effusion are inversely dependent on the square of the mass of each gas. That is:

\frac{r_1}{r_2} =\frac{\sqrt{M_2} }{\sqrt{M_1} }

If rate of effusion of nitrogen is Xdistance / 48s and for the unknown gas is X distance / 60s and mass of nitrogen gas is 28g/mol (N₂):

\frac{X/48s}{X/60s} =\frac{\sqrt{M_2} }{\sqrt{28g/mol} }

6,61 = √M₂

44g/mol = M₂

<em>The molar mass of the gas is 44 g/mol</em>

<em></em>

I hope it helps!

4 0
3 years ago
PLEASE HELP
Ipatiy [6.2K]

Your answer should be “C.”

MARK ME BRAINLIEST PLEASE!!!!!!

6 0
3 years ago
Read 2 more answers
What are the advantages of using digital signals over analog signals?
Studentka2010 [4]

in digital signals, codes are used while in analogue signals do not use signals.

<h3>What are signals?</h3>

Signals are defined as the instructions which are transferred to another source in other to deliver a message.

There are two types of signals which include the digital and analogue signals.

The digital signals uses codes which is a secret way of sending messages while analogue doesn't use codes.

Learn more about codes here:

brainly.com/question/22654163

#SPJ1

4 0
2 years ago
What is molarity and how is it calculated? If possible, please explain it to me detailed. Thank you :)​
Lyrx [107]

Molarity is a concentration unit, defined to be the number of moles of solute divided by the number of liters of solution.

4 0
3 years ago
Other questions:
  • You need 2.5 moles of aluminum for an experiment. How many grams of aluminum is this?
    10·1 answer
  • What’re the answers?
    7·1 answer
  • Members of which group easily lose an electron to form a +1 cation?
    15·1 answer
  • What is a base used in toothpaste?
    15·1 answer
  • As you move from left to right within a period (row), what is the pattern?
    11·1 answer
  • How many molecules of glucose are in 1,456 grams of glucose?
    11·1 answer
  • When 2.3 × 10^3 g of CaCO3 are heated, the actual yield of CaO is 1.09 × 10^3g. What is
    15·1 answer
  • The number of bonds in nitrogen molecule is:
    12·2 answers
  • What is Nuclear fusion​
    14·1 answer
  • Using complete sentences, explain how to predict the products and balance the reaction for the combustion of butane.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!