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
Alexeev081 [22]
3 years ago
13

Please help me with this question!! read the photo

Chemistry
1 answer:
pishuonlain [190]3 years ago
7 0

There are 1.92 × 10^23 atoms Mo in the cylinder.

<em>Step 1</em>. Calculate the <em>mass of the cylinder </em>

Mass = 22.0 mL × (8.20 g/1 mL) = 180.4 g

<em>Step 2</em>. Calculate the<em> mass of Mo </em>

Mass of Mo = 180.4 g alloy × (17.0 g Mo/100 g alloy) = 30.67 g Mo

<em>Step 3</em>. Convert <em>grams of Mo</em> to <em>moles of Mo </em>

Moles of Mo = 30.67 g Mo × (1 mol Mo/95.95 g Mo) = 0.3196 mol Mo

<em>Step 4</em>. Convert <em>moles of M</em>o to <em>atoms of Mo </em>

Atoms of Mo = 0.3196 mol Mo × (6.022 × 10^2<em>3</em> atoms Mo)/(1 mol Mo)

= 1.92 × 10^23 atoms Mo

You might be interested in
How many moles of H2SO4 are needed to completely neutralize 0.0164 mol KOH
Vanyuwa [196]
0.0082 You have to equal out the amount of concentration with the unknown
8 0
3 years ago
Read 2 more answers
Commercial grade HCl solutions are typically 39.0% (by mass) HCl in water. Determine the molality of the HCl, if the solution ha
marta [7]

Molality of the solution is defined as the number of moles of a substance dissolved divided by the mass of the solvent:

Molality = number of moles / solvent mass

From the concentration of 39% (by mass) of HCl in water, we construct the following  reasoning:

in 100 g solution we have 39 g hydrochloric acid (HCl)

number of moles  = mass / molecular weight

number of moles of HCl = 39 / 36.5 = 1.07 moles

solvent (water) mass = solution mass - hydrochloric acid mass

solvent (water) mass = 100 - 39 = 61 g

Now we can determine the molality:

molality = 1.07 moles / 61 g = 0.018

8 0
3 years ago
6. The modern view of the atom has come a long way from that of a solid, indestructible sphere
Fynjy0 [20]
It is a true statement
4 0
3 years ago
Add the polynomials (7x^3-2x^2-12)+(3x^3-8x^2+10x)
laiz [17]

Answer:

10 x ^3 − 10 x ^2 + 10 x − 12

Explanation:

4 0
3 years ago
Which of the following statements is true about a hypothesis?
Tatiana [17]
A hypothesis is a prediction of what you believe to be true.
8 0
3 years ago
Read 2 more answers
Other questions:
  • 1. A student calculated the theoretical yield of BaSO4(s) in a precipitation experiment to be 1.352 grams. When she filtered, dr
    5·1 answer
  • The area of the gold electrodes on the quartz crystal microbalance at the opening of Chapter 2 is 3.3 mm^2. One gold electrode i
    13·1 answer
  • What is the mass in 6.34x10^23 molecules of calcium chloride
    12·1 answer
  • Two characteristics of radiowaves​
    6·1 answer
  • Of the following metals, which ions are most easily reduced? Use the following table to answer the question.
    9·1 answer
  • 2mL of a serum sample was added to 18mL of phosphate buffered saline (PBS) in Tube 1. 10mL of Tube 1 was added to 40mL of PBS in
    14·1 answer
  • How can iodine ( Z = 53) have a higher atomic number yet a lower atomic mass than telluriurn ( Z = 52)?
    7·1 answer
  • What happens to most of the energy as it moves throughout a food web?
    14·1 answer
  • When you see or visit grasslands, what do you know about the climate? (Select all that apply.)
    11·2 answers
  • 14. A cylinder at 48.0 atm pressure and 17.0°C releases 35.0 mL of carbon dioxide gas into a
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!