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
DochEvi [55]
3 years ago
10

The mass of 1.63×10^21 silicon atoms

Chemistry
1 answer:
kow [346]3 years ago
4 0

Answer:

I think it is 7.60 X 1

but if it's not srry

You might be interested in
What is the affect of increasing the water's mass?how does it reflect it's temperature?
Nikolay [14]
I assume what you're asking about is, how does the temperature changes when we increase water's mass, according the formula for heat ? 
Well the formula is : Q=m\cdot c\cdot \Delta t (where Q is heat, m is mass, c is specific heat and \Delta t is change in temperature. So according this formula, increasing mass will increase the substance's heat, but won't effect it's temperature since they are not related. Unless,  if you want to keep the substance's heat constant, in that case when you increase it's mass you will have to decrease the temperature
8 0
3 years ago
The electrons in the outer shell of an atom are called:<br> outer<br> ionized<br> polar<br> valence
Marrrta [24]
Valence.

The electrons in the outer shell of an atom are called valence electrons. 

Valence electrons determine whether the an element is ready form compounds. These electrons can be gained, lost, or shared in the formation of compounds.
7 0
3 years ago
if you react 100g of ammonium chloride with excess calcium oxide, what Is the theoretical yeild (in grams) of ammonia? when you
Maurinko [17]

Answer:

31.78 grams

25.55%

Explanation:

The balanced reaction for ammonium chloride with calcium oxide will be:

2NH4Cl + Ca(OH)2 ---> CaCl2 + 2NH3 + 2H2O

The molecular weight for ammonium chloride(NH4Cl ) is 53.49g/mol, while the molecular weight for ammonium(NH3) is 17g/mol. The number of theoretical yield of ammonia from 100g of ammonium chloride will be:

100g / (53.49g/mol) * 2/2  * 17g/mol= 31.78 grams

If the actual yield is 8.12g, the percent yield will be: 8.12g/31.78g * 100% =25.55%

4 0
3 years ago
How old was the oldest animal fossil <br>help thx​
JulijaS [17]

Answer:

the Rhyniognatha hirsti

Explanation:

at age 400 million years old

5 0
3 years ago
Which cell organelle is like the construction site, where proteins are built? Which cell organelle packages and transports the p
german

Explanation:

The endoplasmic reticulum consists of a network of a tube-like passageway through which proteins from the ribosomes are able to be moved within a cell as the road system allows for movement throughout the city.

7 0
3 years ago
Other questions:
  • Which of the following species is a molecular element? Which of the following species is a molecular element? sodium neon carbon
    15·1 answer
  • 78.5 mol of P4O10 contains how many moles of P?
    9·1 answer
  • Which compound is insoluble in water?<br> (1) BaSO4 (3) KClO3<br> (2) CaCrO4 (4) Na2S
    15·2 answers
  • What the name of th compound Mg (NO3)2
    12·1 answer
  • WILL CHOOSE BRAINLIEST!!<br> what are electromagnetic waves!!??
    13·1 answer
  • which of these is an example of a chemical change A breaking glass B mealting ice on a windshield C burning gasoline D denting a
    14·2 answers
  • Question 3 (10 points)<br> How many valence electrons are in a neutral atom of Neon-212
    7·1 answer
  • Word equation for Silver being added to sulphuric acid
    7·1 answer
  • Why is electrical conductivity a resourceful property of metals like copper, silver, and aluminum?
    8·1 answer
  • What is the mass number of an iron atom that has 29 neutrons?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!