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
borishaifa [10]
3 years ago
10

After 17.1 thousand years, what percentage of the original carbon-14 would be left in an organism’s remains? After 17.1 thousand

years, what percentage of the original carbon-14 would be left in an organism’s remains? 25% 17.1% 12.5% 6.25%
Chemistry
1 answer:
hram777 [196]3 years ago
6 0

Answer:

12.5%

Explanation:

Initial percentage of carbon 14 = 100%

Final percentage = ?

Time passed = 17.1 * 1000 years = 17100 years

Half life of carbon 14 = 5,730 years.

So how many Half lives are in 17100 years?

Number of Half lives = Time passed /  Half life = 3.18 ≈ 3

First Half life;

100% --> 50%

Second Half life;

50% --> 25%

Third Half life ;

25% --> 12.5%

You might be interested in
7.Calculate the volume of nitrogen that reacts with 12dm3 of hydrogen with the volume of both gases measured at rtp:
marta [7]

Answer:

4.03dm³

Explanation:

The reaction expression is given as:

       3H₂   +   N₂   →    2NH₃  

  Volume of hydrogen  = 12dm³  

AT rtp:

             1 mole of gas occupies volume of 22.4dm³  

             x mole of hydrogen will occupy a volume of 12dm³

     Number of moles of hydrogen  = \frac{12}{22.4}   = 0.54mole

From the balanced reaction equation:

            3 mole of hydrogen gas combines with 1 mole of Nitrogen gas

         0.54 mole of hydrogen as will therefore combine with \frac{0.54}{3}   = 0.18moles of nitrogen gas

Since ;

                     1 mole of gas occupies a volume of 22.4dm³

               0.18moles of Nitrogen gas will occupy 0.18 x 22.4  = 4.03dm³

6 0
3 years ago
1. Rank the following compounds in order of decreasing acid strength using periodic trends. Rank the acids from strongest to wea
Softa [21]

Answer:

1. HBr>HCl> H2S >BH3

2.K_a1 very large — H2SO4

K_a1= 1.7 x 10^−2 — H2SO3

K_a1 = 1.7 x 10^−7 — H2S

Explanation:

As one goes down a row in the Periodic Table the properties that determine the acid strength can be observed.

The atoms get larger in radius meaning that in strength, the strength of the bonds get weaker, conversely meaning that the acids get stronger.

For the halogen-containing acids above following the rows and periods, HBr has the strongest bond and is the strongest acid and others follow in this order.

HBr>HCl> H2S >BH3

Acid Dissociation Constant provides us with information known as the ionization constant which comes in handy to measure the acid's strength. The meaning of the proportions are thus, the higher the Ka value, the stronger the acid i.e. it liberates more number of hydrogen ions per mole of acid in solution.

In solution strong acids completely dissociate hence, the value of dissociation constant of strong acids is very high.

Following the cues above on Ka;

K_a1 very large — H2SO4

K_a1= 1.7 x 10^−2 — H2SO3

K_a1 = 1.7 x 10^−7 — H2S

5 0
3 years ago
Which of the following would be more likely to conduct electrons? Strontium or Iodine? Defend your choice.
Alchen [17]
Strontium because it is a metal
6 0
3 years ago
99% of matter that makes up living organisms consists of how many elements?
DiKsa [7]

Answer:

h2o or air

Explanation:

6 0
3 years ago
The standard unit (SI) for mass is
telo118 [61]
The kilogram is the si
6 0
3 years ago
Other questions:
  • What does the law of conservation of matter/mass state
    13·2 answers
  • Explain why the temperature of water might increase when a solution forms
    6·1 answer
  • How many valance are transferred from the nitrogen atom to potassium in the formation of the compound potassium nitride?
    15·2 answers
  • What is the formula for chromium (III) nitrate?
    13·2 answers
  • Consider a balloon that has a volume V. It contains n moles of gas, it has an internal pressure of P, and its temperature is T.
    13·2 answers
  • The tungsten metal used for filaments in light bulbs is made by reaction of tungsten trioxide with hydrogen: WO3(s)+3H2(g)→W(s)+
    12·1 answer
  • Check all that apply. Some of the characteristics that make a good index fossil are:
    5·2 answers
  • Which of the following statements about atoms is NOT true?
    7·1 answer
  • Which nuclear reactor unit had core damage first? How do you know?
    9·1 answer
  • Find the mass in kilograms of the liquid air that is required to produce 600L of oxygen. In normal condition, 1L of liquid air h
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!