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
GrogVix [38]
2 years ago
10

Isotope b has a half-life of 3 days. a scientist measures out 100 grams of this substance. after 6 days has passed, the scientis

t reexamines the sample.
Chemistry
1 answer:
Brilliant_brown [7]2 years ago
6 0
So half life is the time taken for a sample to decay to half its original mass, its a constant and applies to any original mass, it could be 5g or 1kg, it will take the same amount of time for the original mass to half. In this case the half life is 3 days.

After 3 days the sample will be at half its original mass, now 50g. 

Now we can treat the 50g as if its a new sample. After another 3 days (6 days in total) there will be half of 50g left, = 25g. 


You might be interested in
Use condensed electron configurations and Lewis electron-dot symbols to depict the ions formed from each of the following atoms,
Dennis_Churaev [7]

The formula for Cs and S is Cs₂S.

For Cs and S,

Ions formed will be Cs⁺ and S²⁻

As cesium belongs to group 1A and sulfur belongs to group 6A. Therefore, the condensed electronic configuration is -

For Cs is [Xe} 6s¹ and for S is [Ne] 3s²3p⁴.

Cs have 1 valence electron and S have 6 valence electrons.

Hence to attain a stable electronic configuration, both two Cs atoms lose one electron and form Cs⁺ and these two electrons will be accepted by one S atom to form S²⁻.

Therefore the formula for the compound is Cs₂S as Cs donate 1 electron and S will accept 2 electrons from Cs.

The formula is Cs₂S.

To learn more about electronic configuration, visit: brainly.com/question/15051483

#SPJ4

6 0
1 year ago
Why is the sky blue and not red, even though blue light scatters more easily than red.
balu736 [363]
Because molecules in the air scatter blue light from<span> the sun </span>more than<span> they </span>scatter red light<span>.</span>
6 0
2 years ago
I have to find a cluster of seven honeycombs
IRINA_888 [86]
Look in a beehive SAFELY
7 0
3 years ago
Identify two natural hazards that are more likely to occur in Maryland
tamaranim1 [39]

Answer:

snow storm and a blizzard

Explanation:

7 0
2 years ago
A metal atom loses electrons from its outermost energy level and acquires a...... Charge. These electrons join a nonmetal atom.
sp2606 [1]

Answer : A metal atom loses electrons from its outermost energy level and acquires a Positive Charge. These electrons join a nonmetal atom. The ionic compound formed because of this transfer of electrons is electrically Neutral.

Explanation :

All the elements try to acquire octet state by gaining or losing electrons. For metals, the number of valence electrons are less and it is easier to lose these electrons.

When electrons are lost, the number of protons become more than the electrons. This creates an excess of positive charge. As a result the species becomes positively charged and is known as cation.

During formation of ionic bond, metals always form a positive ion (cation) by losing electrons. These electrons are accepted by the nonmetals and they become negatively charged. A negatively charged ion is known as anion and nonmetals always form an anion.

These are attracted to each other due to the opposite charges present on them. In an ionic compound they balance the charges on each other making the compound neutral.

From the above discussion, we can fill in the blanks as follows.

A metal atom loses electrons from its outermost energy level and acquires a Positive Charge. These electrons join a nonmetal atom. The ionic compound formed because of this transfer of electrons is electrically Neutral.



7 0
2 years ago
Other questions:
  • The starting substanceses of a chemical reaction are refered to as
    7·1 answer
  • Use Q = mcAT
    14·1 answer
  • What is Delta.S for the reaction N2(g) +O2(g) Right arrow. 2NO? Use Delta.G = 173.3 kJ at 303.0 K and Delta.H = 180.7 kJ. Use De
    13·1 answer
  • I don’t know how to answer these, can anyone answer any of them?
    10·1 answer
  • What is the Kb expression for aniline (C6H5NH2)?
    15·2 answers
  • Anything in red is the question
    11·1 answer
  • Be sure to answer all parts. Consider the reaction N2(g) + 3H2(g) → 2NH3(g)ΔH o rxn = −92.6 kJ/mol If 4.0 moles of N2 react with
    5·1 answer
  • HELP ME! IM SO DESPERATE I WILL GIVE YOU BRANLIEST!!!!!!!!!!!!!!!!
    8·1 answer
  • The temperature of 150 mL of water is 25°C. What must happen for the temperature of the water to increase to 35°C?
    15·1 answer
  • How would Bohr model show the protons in a carbon atom
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!