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
nexus9112 [7]
3 years ago
13

Gold has a molar mass of 197 g/mol. (a) how many moles of gold are in a 3.98 g sample of pure gold? (b) how many atoms are in th

e sample?
Chemistry
1 answer:
Natali5045456 [20]3 years ago
6 0
A.)49.4974874 moles or 49.5 moles
B.)2.980808730172671e+25 or 3e+25
You might be interested in
The chief advantage of the metric system over other systems of measurement is that it ____.
OlgaM077 [116]

The chief advantage of the metric system over other systems of measurement is that it B. is in multiples of 10.

This can be seen in the picture below that shows the prefixes of the metric system.


7 0
2 years ago
Read 2 more answers
If you try to balance an equation by changing subscripts you change...
aksik [14]

Answer:

kwkrofofoxosowoqoaododpdprofpcoxozoskawkdjdn

Explanation:

sklwlrlfclxoskkekrdododosoekekrkrododowoekekfkdodkwkeororkdkdkwejrjrkfidiwi3jr

8 0
2 years ago
To balance a half-reaction in basic solution, you need to add enough of which substances to balance the equation?
LenKa [72]
I'm not sure if this is what you're looking for, but I suppose you would have to have the solute and the solution to balance the reaction.
4 0
3 years ago
Read 2 more answers
How are biology and Chemistry are related give any two points or reasons​
k0ka [10]

Answer:

Both of them are related most of the structures of human body .The working of cells, the cellular respiration processes ,the proteins synthesizing carbohydrates syntheses lipids synthesis and many other reactions involves chemistry.

•Chemistry and biology both are branches of science so they are much more related to each other.

Explanation:

<h2>I hope it's helpful for you</h2>
6 0
2 years ago
Read 2 more answers
M=10,V=2 What is the density
Sever21 [200]

Answer:

Density (ρ) = 5 kilogram/cubic meter

Explanation:

Steps:

ρ =  

m

V

=  

10 kilogram

2 cubic meter

=  5 kilogram/cubic meter

4 0
3 years ago
Other questions:
  • (a) Calculate the density of a 374.5-g sample of copper if it has a volume of 41.8 cm3. (b) A student needs 15.0 g of ethanol fo
    15·1 answer
  • What is the empirical formula of a compound containing carbon, hydrogen, and oxygen in the ratio 14:42:84? C14H42O84
    14·2 answers
  • The fluoride rinse in dental offices usually contains sodium fluoride. Sodium fluoride can be prepared from the reaction between
    15·2 answers
  • What must occur for a change to be a chemical reaction?
    6·1 answer
  • Where do Alkanes come from​
    15·1 answer
  • We use less than 1% of the water on Earth for
    12·2 answers
  • A 52.0 mL portion of a 1.20 M solution is diluted to a total volume of 278 mL. A 139 mL portion of that solution is diluted by a
    10·1 answer
  • cuantos gramos de oxígeno necesarios para que reaccionen completamente 28 gramos de etanol (c2h5oh) en la reaccion de combustion
    9·1 answer
  • How many particles are in 2.4 moles of carbon dioxide
    5·1 answer
  • How could you engineer a device that produces beneficial friction and heat?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!