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
zepelin [54]
2 years ago
9

3.

Chemistry
1 answer:
Vsevolod [243]2 years ago
3 0

Answer:

2 half-lives=0.8

6 half-lives= 0.05

Explanation

Half-lives are constant and always decrease by half, implying that the concentration decreases by half at a consistent rate.

3.2/2= 1.6/2= 0.8 is two half-lives

3.2/2= 1.6/2= 0.8/2= 0.4/2= 0.2/2= 0.1/2=0.05 is six half-lives

You might be interested in
__________ is designed to protect you from injuries to your head, face, eyes, ears, hands, feet, respiratory tract, and body. A.
Nadusha1986 [10]
_________ is designed to protect you from injuries to your head, face, eyes, ears, hands, feet, respiratory tract, and body
the answer to this question, is B personal protective equipment
hope this helps :D
3 0
3 years ago
Read 2 more answers
A student observes two strips of magnesium, mg ribbon that are each 3cm long. One strip of magnesium
ankoles [38]

Therefore option c , i.e. The substances in both test tubes are reactive only at high temperatures. is the only statement which is NOT supported by the student's observations.

<h3>What is the reaction between Magnesium and Hydrogen ?</h3>

Magnesium reacts with hydrochloric acid to produce hydrogen gas

Mg (s) + 2 HCl (aq) → MgCl₂ (aq) + H₂ (g)

In this reaction, the magnesium and acid are gradually used up , which can be seen in the test tube 2 .

A chemical reaction is taking place in Test tube 2 ,

Hydrogen gas is released in test tube 2 ,

Energy is released in the reaction involving hydrochloric acid and we can see in test tube 2 the reaction is going on

therefore option C i.e. The substances in both test tubes are reactive only at high temperatures. is the only statement which is NOT supported by the student's observation.

To know more about the chemical reaction between Magnesium and Hydrogen and this test.

brainly.com/question/19062002

#SPJ4

6 0
2 years ago
Please Help Meeee.<br> Best answer will get brainliest.
fiasKO [112]

Answer:Yes I am very good at acid

Explanation:

7 0
2 years ago
Read 2 more answers
Which will provide the most direct measure of pH by measuring the hydrogen ion concentration of a solution?
antiseptic1488 [7]
A. pH meter is the instrument which will provide the most direct measure of pH by measuring the hydrogen ion concentration of a solution.
Litmus paper is just a paper which changes color based on whether the solution is an acid or a base. Phenolphthalein is an indicator which changes color based on pH values. And bromthymol blue doesn't tell concentrations, it is just a pH indicator for weak acids and bases.
4 0
3 years ago
If the shape of the moon appears to be increasing over time, what is
Montano1993 [528]

Answer:

B

Explanation:

3 0
2 years ago
Read 2 more answers
Other questions:
  • Compare and contrast a watch and a warning. how can you keep safe during a tornado warning?
    8·2 answers
  • If two balls have the same volume, but ball A has twice as much mass as ball B, which one will have the greater density? ball A,
    14·2 answers
  • How could you verify that you produced carbon dioxide in your combustion reaction? 2. what indication did you have that nh3 was
    9·1 answer
  • A compound contains only nitrogen and oxygen and is 30.5% nitrogen by mass. A gaseous sample of the compound has a density of 3.
    11·1 answer
  • How do you convert moles to grams?
    14·2 answers
  • Make a plot of arsenate species vs. pH for a 25 mM arsenate solution. Vary pH from 0-14. Neglect activity corrections. A groundw
    7·1 answer
  • 3. 79,789kJ = (293k) (377kJ)
    5·1 answer
  • Helium has a density of 1.79 x 10-4 g/mL at standard temperature and pressure. A balloon has a volume of 6.3 liters. Calculate t
    6·2 answers
  • 1. Calculate the mass of 1.000 mole of CaCl2
    9·1 answer
  • Given similar concentrations, the stronger acid corresponds to the lower pH. Comment on the relative strengths of the acids H3PO
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!