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
Svetlanka [38]
3 years ago
14

List one reason as to why historical growth has slowed in recent years.

Chemistry
1 answer:
hodyreva [135]3 years ago
4 0
Lower fertility and longer lifespans steadily increased the potential labor force relative to the total population
You might be interested in
What is the relative atomic mass of an element
Gennadij [26K]

Answer:

20.2 amu.

Explanation:

Let A represent isotope ²⁰X

Let B represent isotope ²²X

From the question given above, the following data were obtained:

For Isotope A (²⁰X):

Mass of A = 20

Abundance (A%) = 90%

For Isotope B (²²X):

Mass of B = 22

Abundance (A%) = 10%

Relative atomic mass (RAM) =?

The relative atomic mass (RAM) of the element can be obtained as follow:

RAM = [(Mass of A × A%)/100] + [(Mass of B × B%)/100]

RAM = [(20 × 90)/100] + [(22 × 10)/100]

RAM = 18 + 2.2

RAM = 20.2 amu

Thus, relative atomic mass (RAM) of the element is 20.2 amu

4 0
2 years ago
Why are naturally occurring substances, such as particulates or carbon dioxide, sometimes considered pollutants?
____ [38]
Because despite being natural they still harm the ozone layer and cause breathing problems, even suffocation.
5 0
2 years ago
Read 2 more answers
Which element had the longest effect on human history?
Dovator [93]
Oxygen I guess :)))       

6 0
2 years ago
Which equation is set up correctly to determine the volume of a 3.2 mole sample of oxygen gas at 50°C and 101.325 kPa?
77julia77 [94]
N = 3.2 moles, T = 50 + 273 = 323 K, P = 101.325 kPa,  R = 8.314 L.kPa/K.mol 

PV = nRT

V = nRT / P           substituting.

V = (3.2 mole)(8.314 L.kPa/K.mol )(323 K) / (<span>101.325 kPa)

That is the answer, but it is not among the options you provided. Check your options properly.</span>
7 0
3 years ago
Read 2 more answers
If the half life of iridium-182 is 15 years, how much of a 3 gram sample is left after 2 half-lives?
padilas [110]

Answer:

D. 0.75 grams

Explanation:

The data given on the iridium 182 are;

The half life of the iridium 182, t_{(1/2)} = 15 years

The mass of the sample of iridium, N₀ = 3 grams

The amount left, N(t) after two half lives is given as follows;

N(t) = N_0 \left (\dfrac{1}{2} \right )^{\dfrac{t}{t_{1/2}} }

For two half lives, t = 2 × t_{(1/2)}

∴ t = 2 × 15 = 30

\dfrac{t}{t_{(1/2)}} = \dfrac{30}{15} = 2

\therefore N(t) = 3 \times\left (\dfrac{1}{2} \right )^2 = 0.75

∴ The amount left, N(t) = 0.75 grams

4 0
2 years ago
Other questions:
  • Alex saw a rusty old car in an abandoned lot. Because he had recently read about chemical reactions, he began to wonder how the
    14·1 answer
  • What is a thermograph
    14·2 answers
  • What man-made carbohydrate is banned in Canada, China, and the European Union, but is legal in the United States?
    14·1 answer
  • Who was charles darwin
    13·2 answers
  • How did Dalton gather evidence for the existence of atoms?
    5·1 answer
  • Name 20 inorganic compounds
    6·1 answer
  • Which of these observations is not an example of a physical property of matter? A. The density of sea water is measured to be 1.
    6·2 answers
  • can someone make me a lab report? Please......... Objective(s): In your own words, what was the purpose of this lab? Hypothesis:
    14·2 answers
  • 2 Na + Cl2 --&gt; 2 NaCl
    8·1 answer
  • Do bases lose or gain hydrogen ions?<br><br><br>Help :-)
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!