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
Allisa [31]
3 years ago
13

Tổng số hạt của nguyên tử X là 40 trong đó số hạt mang điện nhiều hơn số hạt E mang điện là 12.

Chemistry
1 answer:
Alona [7]3 years ago
8 0
I’m pretty sure b! hope you get it right
You might be interested in
A chemical test has determined the concentration of a solution of an unknown substance to be 2.41 M. a 100.0 mL volume of the so
Oksana_A [137]

Answer : The molar mass of unknown substance is, 39.7 g/mol

Explanation : Given,

Mass of unknown substance = 9.56 g

Volume of solution = 100.0 mL

Molarity = 2.41 M

Molarity : It is defined as the number of moles of solute present in one liter of volume of solution.

Formula used :

\text{Molarity}=\frac{\text{Mass of unknown substance}\times 1000}{\text{Molar mass of unknown substance}\times \text{Volume of solution (in mL)}}

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

2.41M=\frac{9.56g\times 1000}{\text{Molar mass of unknown substance}\times 100.0mL}

\text{Molar mass of unknown substance}=39.7g/mol

Therefore, the molar mass of unknown substance is, 39.7 g/mol

5 0
3 years ago
Please help me if your good with science:).
stellarik [79]
D an average train goes 300 km/h or 190-220 mph
5 0
2 years ago
Which statement is true of a food web?
viva [34]

Answer:

A= producers have the greatest amount of available energy

3 0
2 years ago
According to theory, which phrase best describes the universe before the Big Bang? A. a star B. a planet C. a cloud of gas and d
mario62 [17]

Answer:

D. A densely packed space

A lot of people seem to say it's a cloud of dust and gas, but when I took a test on it, the answer said it was actually a densely packed space.

Explanation:

8 0
3 years ago
How is the prcent of ethylene glycol in de-icing fluid related
kvv77 [185]
Sorry i have no idea
5 0
3 years ago
Other questions:
  • Give the quantum values of n,l,m and s for nitrogen
    14·1 answer
  • a dog is trained to sit and shake hands. These traits are most likely? a. inherited b. not inherited c. not acquired d. innate
    15·1 answer
  • Which substance is an Arrhenius acid?<br>a. H2<br>b.HCI<br>c. KCI<br>d, NH,3​
    14·1 answer
  • Consider the following intermediate chemical equations.
    9·1 answer
  • Which feature is one of the defining features of a hurricane?
    14·1 answer
  • If the same index fossils are found in different rock strate miles apart, what is probably true about the rock layers?
    12·1 answer
  • What must be done to increase temperature?
    14·1 answer
  • If a book has a weight of 23.2 N on Earth, what is its mass?
    8·1 answer
  • How much more would a 20.0 gallon tank for propane
    10·1 answer
  • Which buffer can be suitable to prepare a solution that needs to be buffered at pH 4? Explain your
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!