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
MissTica
2 years ago
6

Calculate the number of moles found in 3.045x1024 atoms of helium. PLS HELP

Chemistry
1 answer:
Kisachek [45]2 years ago
4 0

Explanation:

so for this u have to use this equation where

Moles = number of particle/6.02×10^23

= 3.045 × 10^24/6.02×10^23

= 5.0581

write it to 3 S.F so 5.06 moles

You might be interested in
draw the lewis structure for CO2, H2CO3, HCO3-, and CO3 2-.Rank these in order of increasing attraction to water molecules. Expl
gavmur [86]

Answer:

The structures are attached in file.

Hydrogen bonding and intermolecular forces is the reason for ranks allotted.

Explanation:

In determining Lewis structure, we calculate the overall number of valence electrons available for bonding.  Making carbon (the least electronegative atom) the central atom in the structure, we allocate valence electrons until each atom has achieved stability.

In order of decreasing affinity to water molecules:

CO_{3}^{2-}  > HCO_{3} ^{2-} > H_{2} CO_{3}

This is due to the fact that the CO_{3}^{2-}will accept protons more readily than the bicarbonate ion, HCO_{3} ^{2-}. Carbonic acid, H_{2} CO_{3} will not accept any more protons, hence it is the least attractive to water molecule, even though soluble.

3 0
3 years ago
1. Each substance written to the right of the arrow in a chemical equation is a
Scorpion4ik [409]

Answer: product

Explanation:

Each substance written to the right of the arrow in a chemical equation is referred to as a product.

When writing a chemical equation, the substance that's written to the left of arrow in the equation is the reactants.

On the other hand which is the right side is the product.

5 0
2 years ago
How does the density of a hershey bar compare to the density of the a half bar?
anastassius [24]

The density would be the same for the whole bar as well as one half of the bar. Density is a identity I believe, by this I mean that it stays the same no matter how little or how much of the same substance you have. Since density = mass / volume, half the bar has half of the weight as well as half of the volume of the whole bar, making the density the same.

For example, a block weighs 10 grams and has a volume of 5 ml. the density would be d = 10/5 or, d = 2g/ml

Half of the block weighs 5 grams and has a volume of 2.5 ml. The density is d = 5/2.5, or, d = 2 g/ml.

See, although there are different amounts of the same substance, their density is the same.

8 0
2 years ago
A sample of 250 g of water are heated from 40°C to 121°C, calculate the amount of heat energy absorbed.
Marysya12 [62]

Answer:

the anwser isn't in the choices

Explanation:

H=MC(change of temp.)

M=mass of water=250g

C=specific heat of water = 4.186 j/g

change in temperature is 121-40= 81

H= 250x4.186x81=84766.5J

7 0
3 years ago
Balance the following equation in acidic conditions. Phases are optional. Cu NO3,
Gwar [14]
If your equation is <span>Cu+NO^- 3-->Cu^2+NO, then the answer is 
</span><span>2 Cu + 1 NO3{-}  → 1 Cu^{2+} + 3 NO 
</span>
To check if it is balance, this is the solution:
2- Cu- 2
3- N -3
3- O -3 

5 0
3 years ago
Other questions:
  • Which change of state is shown in the model?
    10·2 answers
  • PLEASE HELP ASAP
    13·1 answer
  • Plz help meh, I think there is trick question!!!
    6·2 answers
  • Sean is moving heavy furniture by sliding it across the floor. he puts a blanket under Meath the furniture why did this help him
    9·1 answer
  • Review the families and classification of elements in the periodic table. Based on this information, you would expect elements t
    12·2 answers
  • Scavengers break down wastes into simple, organic substances. <br> a. true <br> b. false
    14·2 answers
  • Help please i am being timed
    14·2 answers
  • Most of the elements on the Periodic Table are found in nature as
    9·1 answer
  • What is the difference between cellular respiration and breathing?​
    5·1 answer
  • With a gas station on almost every corner, it’s hard to imagine life without fossil fuels. Fossil fuels power everything from ho
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!