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
LiRa [457]
3 years ago
12

Use the accepted values for the molar masses of zinc and gold to determine the mass of gold needed to have the same number of at

oms as 10 g of zinc.
Chemistry
1 answer:
Monica [59]3 years ago
5 0

Answer:

30 g of Au have the same number of atoms as 10 g of Zn

Explanation:

Molar mass Au: 196.97 g/m

Molar mass Zn: 65.41 g/m

10 g of Zn are (mass / molar mass) = 0.153 moles

(10 g / 65.41 g/m)

And now let's count the atoms in this amount of Zn ( mol . NA)

0.153 m . 6.02×10²³ = 9.20×10²² atoms of Zn

In which mass of Au, will we have, these quantity of atoms.

So 9.20×10²² atoms are contained in 0.153 moles.

Then, let's convert the moles in mass (mol . molar mass) to get the answer.

0.153 m . 196.97 g/m = 30.1 g

You might be interested in
Explain why metals are good conductors of electric current.
Phantasy [73]
For example, copper is used for electrical<span> wiring because it is a </span>good conductor of electricity<span>. </span>Metal<span> particles are held together by strong metallic bonds, which is why they have high melting and boiling points. The free electrons in </span>metals<span> can move through the </span>metal<span>, allowing </span>metals<span> to conduct </span>electricity<span>.</span>
5 0
2 years ago
Read 2 more answers
A container of N, 03(9) has a pressure of 0.490 atm. When the absolute temperature of the N, O2(g) is tripled, the gas
spayn [35]

Answer: 1.59atm

Explanation:

We have that for the Question "Calculate the final pressure of the gas mixture, assuming that the container volume does not change."

it can be said that

The final pressure of the gas mixture, assuming that the container volume does not change =

From the question we are told

A container of N2O3(g) has a pressure of 0.265 atm. When the absolute temperature of the N2O3(g) is tripled, the gas completely decomposes, producing NO2(g) and NO(g).

3 0
1 year ago
A 1.28-kg sample of water at 10.0 °C is in a calorimeter. You drop a piece of steel with a mass of 0.385 kg at 215 °C into it. A
Kryger [21]

Answer:

T_{2}=16,97^{\circ}C

Explanation:

The specific heats of water and steel are  

Cp_{w}=4.186 \frac{KJ}{Kg^{\circ}C}

Cp_{s}=0.49 \frac{KJ}{Kg^{\circ}C}

Assuming that the water and steel are into an <em>adiabatic calorimeter</em> (there's no heat transferred to the enviroment), the temperature of both is identical when the system gets to the equilibrium T_{2}_{w}= T_{2}_{s}  

An energy balance can be written as

m_{w}\times Cp_{w}\times (T_{2}- T_{1})_{w}= -m_{s}\times Cp_{s}\times (T_{2}- T_{1})_{s}  

Replacing

1.28Kg\times 4.186\frac{KJ}{Kg^{\circ}C}\times (T_{2}-10^{\circ}C)= -0.385Kg\times 0.49 \frac{KJ}{Kg^{\circ}C} \times (T_{2}-215^{\circ}C)

Then, the temperature T_{2}=16,97^{\circ}C

8 0
2 years ago
Which of the following Substances would have the highest vapor pressure at 298 K?
elena-14-01-66 [18.8K]
The answer is D. hope I was right
7 0
3 years ago
What determines the types of chemical reactions that an atom participates in?
nikklg [1K]

Answer:

The innermost electron shell of an atom can hold up to _____ electrons. ... What determines the types of chemical reactions that an atom participates in? the number of electrons in the outermost electron shell. Atoms with the same number of protons but with different electrical charges

7 0
3 years ago
Other questions:
  • g A mass spectrum. The peak at mass 100 has a 8% relative abundance. THe peak with mass 85 has a 40% abundance. The peak at 71 h
    12·1 answer
  • What is the molar mass in g/mol for In2S3?
    11·1 answer
  • When 1.00 g of thiamine hydrochloride (also called vitamin B1 hydrochloride) is dissolved in water, then diluted to 10.00 mL, th
    7·1 answer
  • If you were asked to convert 1.3 mol Al to atoms, which of the following should you use for the conversion?
    11·1 answer
  • Please answer #8 &amp; #9
    14·2 answers
  • Which physical method can be used for obtaining a sample of solid from a small beaker of salt water?
    6·2 answers
  • In the Lewis structure of BF3, how many lone pairs surround the boron atom?
    6·2 answers
  • What is the molar mass of Mercury (II) Nitrite?
    10·1 answer
  • Which method of separation would be most appropriate for separating a mixture of water and alcohol?
    8·2 answers
  • What element is probably most<br> like oxygen and why
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!