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
shutvik [7]
3 years ago
9

A 13.97 g sample of nabr contains 22.34% na by mass. Considering the law of constant composition (definite proportions) how many

grams of sodium does a 5.75 g sample of sodium bromide contain?
Chemistry
1 answer:
Grace [21]3 years ago
3 0

As per the law of constant composition, a given sample will always contain the same number of elements that combine in the same mass proportion.

Therefore if a sample of 13.97 g of NaBr contains 22.39 % of Na by mass then,  a sample of 5.75 g of NaBr would also contain 22.39% Na by mass

Hence:

Mass of Na = 5.75 g * 22.39/100 = 1.287 g

5.75 g of NaBr would contain 1.29 g of Na

You might be interested in
We can change a gas to liquid by the temperature and the pressure. NextReset
USPshnik [31]
We can change a gas to a liquid by INCREASING the temperature and DECREASING the pressure
7 0
3 years ago
Read 2 more answers
it takes 513 kj to remove a mole of electrons from the atoms at the surface of a piece of metal. how much energy does it take to
schepotkina [342]

Answer:

The right solution is "8.5\times 10^{-19} \ joule".

Explanation:

As we know,

1 mole electron = 6.023\times 10^{23} \ no. \ of \ electrons

Total energy = 513 \ KJ

                     = 513\times 1000 \ joule

For single electron,

The amount of energy will be:

= \frac{513\times 1000}{(6.023\times 10^{23})}

= 8.5\times 10^{-19} \ joule

8 0
3 years ago
A certain man needed 400N of force to pull a load through a distance of 150cm in 8s . Calculatell i) the work done by man ii) th
Igoryamba

Answer:

a) 600 J

b) 75 W

Explanation:

Force= 400 N, distance = 150 cm = 1.5 m, time= 8s

a) Work is the product of force acting on an object and distance (or displacement). The S.I unit of work is the joules.

Work = force × distance = 400 × 1.5 = 600 J

b) Power is the amount of energy transferred per unit time. It is the ratio of work to time. The S.I unit of power is watt

Power = work/time = 600 / 8 = 75 W

5 0
3 years ago
How is the food in a stomach broken down into simpler substances? What chemicals help this process?
Ksenya-84 [330]

Answer:

with the help of the juice contained in it

4 0
3 years ago
How are tadpoles and larvae similar
Bad White [126]

Answer:

C. they both eat and grow a lot, i hope it helps

6 0
2 years ago
Other questions:
  • What volume will 50.2 grams of co2 (g) occupy at stp?
    8·1 answer
  • Light travels at a rate of 3.00 x 10^8 m/s. It takes light 8.30 min to travel from the surface of the sun to the earth. What is
    14·1 answer
  • which element is the most electronegative out of the following K Mn Br WILL MARK BRAINLIEST!
    7·1 answer
  • Why is pure silicon a poor conductor at room temperature?
    7·1 answer
  • Avogadro constant is 6.02 1023 (the number of atoms or molecules per mole). What how much charge is there in 1 mole of electrons
    13·1 answer
  • _______ the atomic number is the same number of these particles?
    11·1 answer
  • How many molecules are in 4.2 miles of water?​
    7·1 answer
  • What is the concentration of bromide, in ppm, if 115.91 g MgBr2 is dissolved in 1.31 L water.
    12·1 answer
  • you are working in an office of a precious metal buyer and miner bring a nugget of metal and he claims its cold you suspect that
    8·1 answer
  • Why is the periodic table not arranged by atomic weight and instead arranged by atomic number?
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!