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
kirill115 [55]
2 years ago
9

A sample of polonium-210 has an initial mass of 390 milligrams (mg). If the half-life of polonium-210 is 36 days, how many mg of

the sample remains after 72 days?
A.
392 mg

B.
195 mg

C.
97.5 mg

D.
48.75 mg
Chemistry
2 answers:
kondaur [170]2 years ago
5 0

Answer: D. 48.75

Explanation: just took the test

maw [93]2 years ago
5 0

Answer:

D

Explanation:

I got this question right on my test.

You might be interested in
Vrite skeleton equations for the following word equations.
almond37 [142]

Answer:

g

Explanation:

g

4 0
3 years ago
Read 2 more answers
All waves carry<br> A) energy. <br> B) light. <br> C) matter. <br> D) particles.
7nadin3 [17]
A. energy would be the answer 
4 0
3 years ago
Read 2 more answers
The different molecules that make up the air in a room have on average the same kinetic energy. How does the speed of the differ
kap26 [50]
The formula for kinetic energy is KE=1/2(mv²).  Since both mass and velocity are multiplied by each other, particle with a larger mass needs to be moving slower than a particle with less mass if both have the same kinetic energy. You can think of it as 2KE/m=v² or 2KE/v²=m, If you increase the mass the velocity needs to decrease to keep the same KE value.

I hope this helps.  Let me know in the comments if anything is unclear.
7 0
3 years ago
2
Gemiola [76]

Answer:

the physical and chemical properties of the products are different from the reactants

Explanation:

A chemical reaction involves the chemical combination of two or more elements/compounds called Reactants to give one or more different elements/compounds called Products. A chemical reaction occurs in such a way that the atoms of the reactants are restructured to form product(s) that is/are entirely different from the reactants.

In a chemical reaction, the physical and chemical properties of the products differ from that of the reactants since different chemical compounds/elements are formed as products. The physical properties of a substance, which include colour, melting and boiling point etc. will differ in the reactants and products formed. Also, the chemical structure and identity of the reactants will be changed to give rise to a different chemical property in the products.

7 0
3 years ago
Identify the type of reaction and the products. MgF2+KNO3 -&gt;
Airida [17]

Answer:

double replacement MgN2O6 + KF

Explanation:

7 0
3 years ago
Other questions:
  • What is the percentage composition when 10g of magnesium combines with 4g of nitrogen?
    13·1 answer
  • How do multiple forces interact
    14·1 answer
  • Write the word equations and chemical equations of displacement reaction
    7·1 answer
  • Carbon is found in all organic molecules. <br> a. True<br> b. False
    7·1 answer
  • Why is copper so widely sought on the world and new york mercantile exchange
    9·2 answers
  • (URGENT!) Which of these graphs best models the waves in the four locations?<br> (100 points)
    8·1 answer
  • :X:<br> The image represents a(n)
    14·1 answer
  • 30 POINTS!! Will mark brainliest if correct answer and all work is shown! What mass in grams of tin would be required to complet
    14·1 answer
  • According to Le Chatelier's principle, what happens to the equilibrium constant (K) when the concentration of the reactants is d
    14·2 answers
  • What effect would a decrease or increase in barometric pressure have on the boiling point
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!