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
WARRIOR [948]
3 years ago
15

Chemists use the mole as the unit for the amount of substance. One mole is equal to 6.02 x 10^23 (just like one dozen is equal t

o 12). A 40.1 g sample of calcium contains approximately 1 mole of calcium atoms. How many calcium atoms are in a 4 kg sample of calcium?
Chemistry
1 answer:
Karo-lina-s [1.5K]3 years ago
7 0

Answer:

atoms=6.0x10^{25}atoms

Explanation:

Hello!

In this case, since we are given 4 kg of a calcium-containing sample, in order to compute the atoms there first need to compute the mass in grams:

m=4kg*\frac{1000g}{1kg} =4000g

Next, via the molar mass and the Avogadro's number, we can compute the atoms as follows:

atoms=4000g*\frac{1mol}{40.1g}*\frac{6.02x10^{23}atoms}{1mol}\\\\atoms=6.0x10^{25}atoms

Best regards!

You might be interested in
7. What must you do before you make a hypothesis?
almond37 [142]

Answer:

Ask a question?

Explanation:

look at the scientific method uwu

6 0
3 years ago
Convert 2.17 x 10 -8 Mg into pg
viktelen [127]
This answer is 24 because 2.17 x 10 -8 is 24 so that would be your answer
4 0
3 years ago
No. Of particles in H2SO4 in which 8grams oxygen is present????
steposvetlana [31]

Answer:

7?

Explanation:

Its somewhat hard to comprehend the question, but if the way I read it was right, its 7.

6 0
3 years ago
How much of a radioactive parent isotope will remain after three half-lives have passed?
Sedaia [141]
After three half lives have passed, there would be only 12.5 percent of the original amount of a radioactive parent isotope that will remain. Half life is the time needed for a certain amount of a substance to be half its initial amount. It is a common term used in nuclear chemistry describing how fast radioactive substances undergo decay. One half life would correspond to only 50% would be left. Two half lives would be 25% only of the original value. Three half lives would be 12.5%. Four half lives would be 6.25% of the initial value. So on and so forth.
4 0
3 years ago
A CaCl2 solution is given to increase blood levels of calcium. If a patient receives 6.1 mL of a 12 % (m/v) CaCl2 solution, how
Yuliya22 [10]

Mass of CaCl₂ = 0.732 g

<h3>Further explanation</h3>

The concentration of a substance can be expressed in several quantities such as moles, percent (%) weight / volume,), molarity, molality, parts per million (ppm) or mole fraction. The concentration shows the amount of solute in a unit of the amount of solvent.

\tt \%(m/v)\rightarrow 12\%=\dfrac{mass~CaCl_2}{volume~of~solution}\times 100\%\\\\mass~CaCl_2=12\%\times 6.1\div 100\%\\\\mass~CaCl_2=0.732~g

5 0
3 years ago
Other questions:
  • Which is a quantitative observation A. 15 m long B. red color C. rough texture D. strong odor
    13·1 answer
  • ) How many molecules are in 23 moles of Sodium?
    9·1 answer
  • Which group was fighting communists in Nicaragua in the 1980s?
    13·1 answer
  • Calculate the molar mass of aluminum oxide (Al2O3). Express your answer to four significant figures.
    13·1 answer
  • Which quantity can vary among atoms of the same element?
    7·1 answer
  • Help ..... a chemical equation for this problem ..:
    13·1 answer
  • Which essential fatty acid is rarely found to be deficient as it is typically consumed in abundance in the majority of diets?
    11·1 answer
  • A 4.369 g sample of metal is placed in a flask. Water is added to the flask and the total volume in the flask is read to be 126.
    11·1 answer
  • What is the pressure, in mmHg, of a 4.00 g sample of O2 gas, which has a temperature of 37.0 °C, and a volume of 4400 mL?
    12·1 answer
  • Describe how a metal less reactive than carbon can be reduced from its ore
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!