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
oksian1 [2.3K]
1 year ago
12

What is the mass of 3.55×10−2 mol Ba

Chemistry
1 answer:
scZoUnD [109]1 year ago
7 0

Answer:

4.87 g

Explanation:

The formula between the number of moles, mass and Mr can be used to find the mass of barium.

<em>Number of moles = mass ÷ Mr</em>

So, mass = number of moles × Mr

  Mr of Ba = 137.3

∴ Mass = (3.55 × 10⁻²)  × 137.3 = 4.87 g

You might be interested in
The Hertz (Hz) is the unit of measure for which wave property?
CaHeK987 [17]
The answer to your question is frequency. 

If you would like further information about the subject, private message me and id be happy to explain in further detail for you!. :0
3 0
3 years ago
Read 2 more answers
In which direction does the reaction proceed after heating to 2000 °c?
e-lub [12.9K]
What do I possibly answer here?
ask a full question pls!
6 0
3 years ago
How many milliliters of a 3.4 M NaCl solution would be needed to prepare each solution?
Ksenya-84 [330]

Answer:

a. Approximately 1.3\; \rm mL.

b. Approximately 7.2\; \rm mL.

Explanation:

The unit of concentration "\rm M" is equivalent to "\rm mol \cdot L^{-1}", which means "moles per liter."

However, the volume of both solutions were given in mililiters \rm mL. Convert these volumes to liters:

\displaystyle 45\; \rm mL = 45\; \rm mL \times \frac{1\; \rm L}{1000\; \rm mL} = 0.045\; \rm L.

\displaystyle 330\; \rm mL = 330\; \rm mL \times \frac{1\; \rm L}{1000\; \rm mL} = 0.330\; \rm L.

In a solution of volume V where the concentration of a solute is c, there would be c \cdot V (moles of) formula units of this solute.

Calculate the number of moles of \rm NaCl formula units in each of the two solutions:

Solution in a.:

n = c \cdot V = 0.045\; \rm L \times 0.10\; \rm mol \cdot L^{-1} = 0.0045\; \rm mol.

Solution in b.:

n = c \cdot V = 0.330\; \rm L \times 0.074\; \rm mol \cdot L^{-1} = 0.02442\; \rm mol.

What volume of that 3.4\; \rm M (same as 3.4 \; \rm mol \cdot L^{-1}) \rm NaCl solution would contain that many

For the solution in a.:

\displaystyle V = \frac{n}{c} = \frac{0.0045\; \rm mol}{3.4\; \rm mol \cdot L^{-1}} \approx 0.0013\; \rm L.

Convert the unit of that volume to milliliters:

\displaystyle 0.0013\; \rm L = 0.0013\; \rm L \times \frac{1000\; \rm mL}{1\; \rm L} = 1.3\; \rm mL.

Similarly, for the solution in b.:

\displaystyle V = \frac{n}{c} = \frac{0.02442\; \rm mol}{3.4\; \rm mol \cdot L^{-1}} \approx 0.0072\; \rm L.

Convert the unit of that volume to milliliters:

\displaystyle 0.0072\; \rm L = 0.0072\; \rm L \times \frac{1000\; \rm mL}{1\; \rm L} = 7.2\; \rm mL.

8 0
2 years ago
What's another name for mesh screen
olya-2409 [2.1K]
Another name for a mesh screen is a sieve.
7 0
3 years ago
Ms. Pitt set up a classroom demonstration to show what happens when a sample of zinc metal is add a.ed to a flask containing hyd
Nikolay [14]

Answer:

volume of HCl remains the same

7 0
2 years ago
Read 2 more answers
Other questions:
  • Calculate the root mean square velocity of gaseous argon atoms at 26 ∘c.
    13·1 answer
  • Redox titrations are used to determine the amounts of oxidizing and reducing agents in solution. For example, a solution of hydr
    7·1 answer
  • 16) Which of the following elements is unique to nucleic acids when studying organic compounds?
    12·2 answers
  • 1 l of gas at standard temperature and pressure is compressed to 473ml. what is the new pressure of the gas?
    13·1 answer
  • Two atoms that are isotopes of one another must have the same number of what?
    6·2 answers
  • The pressure exerted on a 240 ml sample of hydrogen gas at constant temperature is increased from 325 mmhg to 550 mm hg, what wi
    9·1 answer
  • What method of heat transfer takes place when particles of matter move from one place to another in a liquid
    10·2 answers
  • You collect 14.2 liters of CO gas from an experiment. How many molecules would be in the sample?
    15·1 answer
  • A temperature of –25°C is equivalent to: Question 2 options: 25 K. 248 K. –25 K. 298 K.\
    9·1 answer
  • 500 gramos de un mineral con una riqueza en cinc del 65 % se hacen reaccionar con una disolucion de acido sulfurico de riqueza 9
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!