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
Ierofanga [76]
3 years ago
7

you are given a sample containing 0.70 moles of a substance. How many atoms are in the sample if the substance is zinc?

Chemistry
1 answer:
yuradex [85]3 years ago
7 0
1 mole ------------- 6.02 x 10²³ atoms
0.70 moles -------- ( atoms zinc )

atoms platinum = 0.70 x ( 6.02 x 10²³ )  / 1

<span> = </span>4.2 x 10²³ atoms zinc

<span>hope this helps!</span>
You might be interested in
Match the scientist with their achievement:
Tju [1.3M]

Answer:

<u>Frederich Miescher</u>- first person to isolate DNA and RNA

<u>Frederick Griffith</u>- first to demonstrate horizontal transmission of dna using bacteria

<u>Gregor Mendel</u>- documented and demonstrated inheritance patterns

Thomas Hunt Morgan- identified chromosomes as the structures responsible for inheritance

<u>Joachim Hammerling</u>- demonstrated that the hereditary information of of eukaryotes is contained within the nucleus

<u>Alfred Hershey and Martha Chase</u>- demonstrated that dna not protein was the molecule responsible for hereditary

<u>George Beadle and Edward Tatum</u>- used mutants to show the relationship between DNA and proteins

<u>Albrecht Kossel</u>- characterized the structure of adenine, guanine, cytosine, thymine, and uracil

Explanation:

Hope this helps! Pls give brainliest!

5 0
2 years ago
The pH of lemon juice is 2, and the pH of orange juice is 4. Which of these is more acidic, and by how much? What does this mean
katovenus [111]

Explanation:

The pH is a 1 to 14 scale that measures how acidic or basic is a solution, at lowest number the solution will be acid, in 7 the solution will be neutral, and in higher values will be basic. It is a  logarithmic scale, so with each number you move, the acidity or basicity will be increased by a factor of 10. So, lemon juice is more acidic than orange juice by a factor of 100.

5 0
3 years ago
Explain why an indicator is used in titration
stellarik [79]

Answer:

Titrations. Because a noticeable pH change occurs near the equivalence point of acid-base titrations, an indicator can be used to signal the end of a titration. When selecting an indicator for acid-base titrations, choose an indicator whose pH range falls within the pH change of the reaction.

Hope it helped!!

4 0
3 years ago
Given that the nucleophilic substitution reaction used 5.0 mL of t-pentyl alcohol and 12.0 mL of conc. hydrochloric acid to prod
Vladimir [108]

Answer:

4.90 g

Explanation:

Given that:

volume of t-pentyl alcohol = 5 mL

the standard density of t-pentyl alcohol = 0.805 g/mL

Recall that:

density = mass(in wt) /volume

mass = density × volume

mass = 0.805 g/mL × 5 mL

mass = 4.03 g

Volume of HCl used = 12 mL

The reaction for this equation is shown in the image attached below.

From the reaction,

88.15 g of t-pentyl alcohol reacts with concentrated HCl to yield 106.59 g pf t-pentyl chloride.

4.03 g of t-pentyl alcohol forms,

= \dfrac{106.59 \ g \times 4.03 \ g}{88.15 \ g} of t-pentyl chloride.

Therefore,

Theoretical yield of t-pentyl chloride = 4.90 g

8 0
3 years ago
Please check if i did it right. did i put the right electric charge
Ad libitum [116K]
Your protons are correct but it’s 28 neutrons not 27!
6 0
3 years ago
Other questions:
  • the air above earth's surface is at a different temperature what is responsible for this difference in temperature
    6·1 answer
  • Discovery can't live without
    15·1 answer
  • Insulin is a protein that is used by the body to regulate both carbohydrate and fat metabolism. a bottle contains 425 ml of insu
    15·1 answer
  • 2. Explain Charles law in terms of the kinetic<br> molecular theory?
    8·1 answer
  • Compare the evaporation of a contained liquid with that of an uncontained liquid.
    12·1 answer
  • (( ~ Please help me ~ ))
    13·1 answer
  • Identify the unit cell that has a = B = y = 90°.
    10·1 answer
  • What is the purpose of the dts other auths and pre audits screen?
    5·1 answer
  • Chloroform is an excellent solvent for extracting caffeine from water. The distribution coefficient, KD, (Cchloroform/Cwater) fo
    9·1 answer
  • If you had equal masses of each of the following substances, which would occupy the greatest volume?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!