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
likoan [24]
3 years ago
15

If the half-time of krypton-81 is 229,00 years, how much krypton-81 was present when the ice first formed

Chemistry
1 answer:
Morgarella [4.7K]3 years ago
8 0

Answer:

6.70g

Explanation:

You might be interested in
When 4.15 grams of silver nitrate is reacted with 1.11 grams of iron(III) chloride, which best represents the amount of silver c
PolarNik [594]

Answer:

The mass of silver chloride produced = 2.202 g

Explanation:

Equation of the reaction is given below

3AgNO₃(aq) + FeCl₃(aq) ----> 3AgCl(s) + Fe(NO₃)₃(aq)

molar mass of AgNO₃ = 170 g/mol

molar mass of FeCl₃ = 233.5 g/mol

molar mass of AgCl = 143.5 g/mol

3 moles of silver nitrate reacts with 1 mole of iron (iii) chloride to give 3 moles of silver nitrate

4.15 grams of AgNO₃ = 4.15/170 = 0.0244 moles of AgNO₃

1.11 grams of FeCl₃ = 1.11/233.5 = 0.0047 moles of FeCl₃

mole ratio of AgNO₃ to FeCl₃ = 0.0244/0.0047 = 5 : 1

therefore, FeCl₃ is the limiting reactant

0.0047 moles of FeCl₃ reacting will produce 0.0047 *  3 moles of AgCl = 0.0141 moles of AgCl

0.0141 moles of AgCl = 0.0141 * 143.5 g of AgCl = 2.02 g of AgCl =

Therefore mass of silver chloride produced = 2.202 g

3 0
3 years ago
What does every food energy chain start with?
Zinaida [17]
Producers (autotroph)

I’m sorry if this isn’t the answer you were looking for, if so, please be more specific and I can try to help again, thank you.
8 0
2 years ago
How do changes to genes affect the traits of an organism?
vodka [1.7K]
Changes to genes can affect the phenotypic traits of an organism, making them look differently.
5 0
2 years ago
What is another name for a beta minus (B-) particle?
pentagon [3]
<span>electron, I believe.
</span>
6 0
2 years ago
Is a mirror transparent, translucent, or opaque? ​
kozerog [31]
A mirror is opaque, meaning that it reflects the light and images that shine on it's reflective surface.
6 0
3 years ago
Read 2 more answers
Other questions:
  • How many molecules in 11 grams of CO2?
    13·1 answer
  • A nugget of gold with a mass of 521 g is added to 50.0 mL of water. The water level rises to a volume of 77.0 mL. What is the de
    5·1 answer
  • Fill up the blank :- If you are using the unit Kelvin, you are measuring the average ......
    12·2 answers
  • What does the number of protons<br> determine?
    7·1 answer
  • Atomic number, Mass Number, Number,<br> of neutrons, Number of Electrons, of 22Na+1​
    5·1 answer
  • Help asap please. Will mark as the brainliest... NO LINKS!!!
    10·1 answer
  • What is the molecular geometry of COF2?
    14·1 answer
  • Nivel de energia maximo de 20Ca
    8·1 answer
  • Identify the correct type of heat transfer for A, B, and C in the picture. Using the picture, cite evidence for your choices.
    11·1 answer
  • In what way do the oceans and the forests perform a similar function in the carbon cycle, under normal conditions?.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!