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
suter [353]
3 years ago
13

PLEASE HELP ASAP

Chemistry
1 answer:
makkiz [27]3 years ago
7 0

Answer:

The average atomic mass of an element is calculated by taking the weighted average of the atomic masses of its stable isotopes.

In other words, each stable isotope will contribute to the average mass of the element proportionally to its abundance.

avg. atomic mass

=

∑

i

(

isotope

i

×

abundance

i

)

Explanation:

You might be interested in
A student placed 19.0 g of glucose (c6h12o6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then
EleoNora [17]
  <span>moles glucose = 19 g / 180 g/mol= 0.105 
M = 0.105 / 0.100 L = 1.05 

moles in 20.0 mL = 1.05 M x 0.0200 L = 0.0216 

New concentration = 0.0216 /0.500 L = 0.0432 M 
moles in 100 mL = 0.100 L x 0.0432 = 0.00432 

mass = 0.00432 x 180 g/mol= 0.778 g</span>
7 0
3 years ago
What is the volume of 0.80 grams of O2 gas at stp?
sergey [27]

<u>Answer: </u>The volume occupied by O_2 at STP is 0.56 L.

<u>Explanation:</u>

To calculate the number of moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}

We are given:

Given mass of oxygen = 0.80 g

Molar mass of oxygen = 32 g/mol

Putting values in above equation, we get:

\text{Moles of oxygen}=\frac{0.80g}{32g/mol}=0.025mol

<u>At STP:</u>

1 mole of a gas occupies 22.4 L of volume.

So, 0.025 moles of oxygen gas will occupy = 22.4\times 0.025=0.56L of volume.

Hence, the volume occupied by O_2 at STP is 0.56 L.

4 0
4 years ago
Read 2 more answers
At what point on the roller coaster do the riders have the greatest amount of potential energy?
Anna007 [38]

Answer:

Point C

Explanation:

Point C has the greatest potential energy because it is at that point that the riders will have maximum height

5 0
2 years ago
Read 2 more answers
A gas is contained in a thick-walled balloon. When the pressure changes from 39.1 bar to 87.0 bar the volume changes from blank
lidiya [134]

Answer: -

1.34 L

Explanation: -

Initial Pressure P 1 = 39.1 bar

Initial Temperature T 1 = 643 K

Let the initial volume be V 1.

Final pressure P 2 = 87.0 bar

Final temperature T 2 = 525 K.

Final volume V 2 = 0.492 L

Using the equation

\frac{P1 V 1}{T1} = \frac{P 2 V 2}{T2}

V 1 = \frac{P2 V2 T1}{P 1 T2}

Plugging in the values

We have

V 1 = 87 bar x 0.492 L x 643 K / (39.1 bar x 525 K)

= 1.34 L

Thus, a gas is contained in a thick-walled balloon. When the pressure changes from 39.1 bar to 87.0 bar the volume changes from 1.34 L to 0.492L and the temperature changes from 643K to 525K

4 0
4 years ago
Read 2 more answers
Which will have a greater volume: 10 grams of liquid water or 10 grams of solid water?
san4es73 [151]
The volume of 10 grams of frozen water is more than the volume of 10 grams of liquid water
5 0
3 years ago
Other questions:
  • Silver chloride is formed by mixing silver nitrate and barium chloride solutions. What volume of 1.50 M barium chloride solution
    15·1 answer
  • The [H3O+] of a solution is 2.5 x10-7. What is the pOH of the solution?
    15·1 answer
  • Water is separated into hydrogen and oxygen gas by electrolysis.
    5·1 answer
  • Given the double displacement reaction below, which of the products would be soluble in water and which would likely form a soli
    13·2 answers
  • Are rocks on Earth's surface stable? What might cause rocks to change? Explain your reasoning.
    15·1 answer
  • During a synthesis reaction, 2.4 grams of magnesium reacted with 8.0 grams of oxygen. What is the maximum amount of magnesium ox
    5·1 answer
  • PLEASE HELP, THIS IS TIMED!!!!!!!!!!!!!!!!!!!!!!!!!!Convert 22.6g AgNO3 to moles.
    11·1 answer
  • Does hydrogen have similar physical properties to alkali metals?
    5·1 answer
  • Which correctly describes the which correctly describes the relationship between a hydrate, water, and an anhydrous compound?
    9·1 answer
  • Draw the alkyl bromide(s) you would use in a malonic ester synthesis of ethyl 2-methyl-4-pentenoate
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!