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
Svetlanka [38]
3 years ago
10

How many moles are in 2.8x10^23 atoms of Calcium?

Chemistry
1 answer:
Zielflug [23.3K]3 years ago
8 0

Answer: 1 mole ➡️ 6.022×10²³ atoms of si.

X mole ➡️ 2.8×10²⁴ atoms of si.

X = 2.8×10×10²³/6.022×10²³

= 28/6.022

= 4.65 moles.

Explanation:

You might be interested in
Caitlin told Teddy that she heard that the largest diamond was found yesterday in Africa. What would be the best source of resea
matrenka [14]
B, the Internet.

If Caitlin told Teddy that the largest diamond was found YESTERDAY then it wouldn't be in last month's science magazine. It also wouldn't be able to be in an encyclopedia at the library because there wouldn't have been any time to write, publish, and for the library to get the encyclopedia in one day. Caitlin's parents may not know about Caitlin's claim or about the diamond in the first place. The Internet would likely have an article about the news-breaking diamond as soon as possible.
5 0
3 years ago
Read 2 more answers
What is an ecosystem? Please use your own words
ExtremeBDS [4]

Answer:

An ecosystem is a community of species.

Explanation:

i hope this helps i tried^^

7 0
3 years ago
Read 2 more answers
Which characteristic would you predict from a solution that has a pH of 5?
AlexFokin [52]
With a pH of five, it would mean that this substance is a weak acid one would also it expect it would be sour.
4 0
3 years ago
Read 2 more answers
The movement of the earths plates is also called:
Ksenya-84 [330]
The movement of the Earth's plates is called Plate Tectonics.  Hope this helps! :D
4 0
4 years ago
Read 2 more answers
Could someone help me with this?
Varvara68 [4.7K]

Solving part-1 only

#1

KMnO_4

  • Transition metal is Manganese (Mn)

#2

Actually it's the oxidation number of Mn

Let's find how?

\\ \tt\Rrightarrow x+1+4(-2)=0

\\ \tt\Rrightarrow x+1-8=0

\\ \tt\Rrightarrow x-7=0

\\ \tt\Rrightarrow x=+7

  • x is the oxidation number

#3

  • Purple as per the color of potassium permanganate

#4

\boxed{\begin{array}{c|c|c}\boxed{\bf Tube} &\boxed{\bf Charge} &\boxed{\bf No\:of\; electrons\: loss}\\ \sf 2 &\sf +6 &\sf 6e^-\\ \sf 3& \sf +2 &\sf 2e- \\ \sf 4 &\sf 4 &\sf 4e^-\end{array}}

7 0
2 years ago
Other questions:
  • HOW TO KNOW THAT A BOND IS IONIC OR COVELENT BY JUST LOOKING AT IT ?
    11·1 answer
  • Calculate the mass of 2.50 mol of CH,OH(1). Show your work. Use the appropriate
    6·1 answer
  • Explain why there is a difference in climate between areas at 0º latitude and areas at 45º latitude.
    13·1 answer
  • Mikayla says that air is an element since it has oxygen in it. Jose says that air is a mixture because each part of air keeps it
    11·1 answer
  • Naphthalene is soluble in diethyl ether, but it is insoluble in water regardless of the solution pH. Explain why this compound c
    5·1 answer
  • Calculate the equilibrium constant for the reaction below given that [Cl2] = 0.37 M, [H2] = 0.27 M, and [HCl] = 0.95 M at equili
    8·1 answer
  • Who needs a higher caloric intake due to higher calorie expenditure? Person sitting on couch Person walking the dog Person playi
    11·1 answer
  • 1718 l of a 0.3556-m c3h7oh solution is diluted to a concentration of 0.1222 m, what is the volume of the resulting solution
    10·1 answer
  • Why are city streets so vital to the functioning of a city, as well as the people living within it?
    10·1 answer
  • In a voltaic (galvanic) cell, oxidation occurs at the _____ and is where _____ in the salt bridge moves toward.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!