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
DerKrebs [107]
2 years ago
14

the half life for strontium-90 is 29 years. how many half-lives did the sample go through at the end of 87 year​

Chemistry
2 answers:
tatuchka [14]2 years ago
6 0

= 87 : 29

= 3 half lives

Nesterboy [21]2 years ago
4 0
90 divided by 29 x 87 = 290
You might be interested in
What is the connection of ascorbic acid when one tablet is dissolved in 200cm cubed of water ?
BartSMP [9]

Answer:

              Option-D: 2.3 × 10⁻³ mol/dm³

Explanation:

Calculate moles of ascorbic acid,

Moles = Mass / M.Mass

Moles = 0.080 g / 176 g/mol

Moles = 0.00045 mole

Also,

Molarity = Moles / Vol. in dm³

Molarity = 0.00045 mol / 0.20 dm³

Molarity = 0.00227 mol.dm⁻¹ or 2.3 × 10⁻³ mol/dm³

5 0
2 years ago
Please match the orbital type with the correct number of orbitals
saul85 [17]
Hi there!

p = e-3
s = f-1
f = i-7
d = g-5

Hope that helps!
Brady
7 0
3 years ago
A child with cystic fibrosis has a mutated protein in his cells which does not behave normally. The mutated protein stops chlori
Helen [10]

Answer:

Explanation:

lung air ways the mucus will clog it up causing asthma hope this helped :P

6 0
3 years ago
Which formula id correctly paired with its name? A. MgSO↓ = magnesium chlorine
Nostrana [21]
D. CuCl2 copper(2)chloride 
4 0
2 years ago
Which is a property of barium (Ba)?
777dan777 [17]

Answer:

i think but i am not sure but according to me it mainly reacts yo non metals and i think its very reactive if my answer is wrong then comment below this question i will see it and i will get an opportunity to learn something new

4 0
3 years ago
Other questions:
  • aluminum bronze contains 92.0% of copper and 8.0% aluminum. what maximum mass of aluminum bronze can be prepared from 73.5g of c
    6·1 answer
  • A 14.3-cm3 sample of tin has a mass of 0.104 kg.
    14·1 answer
  • A solution is prepared by dissolving 50.4 gg sucrose (C12H22O11C12H22O11) in 0.332 kgkg of water. The final volume of the soluti
    15·1 answer
  • The value of AH° for the reaction below is +128.1 kJ CH3OH (I)-CO (g) + 2H2 (g) How much heat is consumed when 87.1 g of hydroge
    10·1 answer
  • If 100.0 grams of na3n decompose to form sodium and nitrogen, how many moles of sodium are formed? write and balance equation be
    7·2 answers
  • What are rules of brainly?
    12·2 answers
  • What are the two groups the animal kingdom is divided into?
    9·1 answer
  • The force resulting from oppositely charged poles is ...
    14·1 answer
  • What are answers to the questions shown below?
    15·1 answer
  • How many atoms are in 5Na3PO4​
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!