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3 years ago

The process by which plants and animals release stored carbon back into the atmosphere is called

Chemistry

2 answers:

Sergio [31]3 years ago

6 0

The answer is respiration

kirza4 [7]3 years ago

6 0

Answer:

Respiration

Explanation:

The carbon exchange between plants and the atmosphere takes place via:

1) Photosynthesis

2) Respiration

Photosynthesis is a process in which the plants take in carbon in the form of CO2 and water and convert it into glucose along with the release of oxygen (O2). The entire reaction requires energy in the form of sunlight.

Respiration, in contrast involves the breakdown of glucose in the presence of O2 to the release the carbon back in the form of CO2, along with the formation of water and energy.

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A titanium cube contains 2.86Ã—1023 atoms. What is the edge length l of the cube? The density of titanium is 4.50 g/cm3 . (The v

elena55 [62]

Answer:

I = 1.716 cm

Explanation:

We want the length of the cube. In this case, we know that the volume of a cube is:

V = I³

From here we can solve for I:

I = ∛V (1)

Now, the volume can be obtained using data of density. The expression for density is:

d = m/V

Solvinf for V:

V = m/d (2)

The mass of the cube, can be obtained with the moles and molar mass of titanium:

m = n * MM (3)

And finally, the moles (n) can be obtained using avogadro number:

1 mol ----> 6.02x10²³ atoms (4)

Therefore, to get the length we need to calculate with the atoms of titanium, the moles, then mass, volume and finally the length. Let's calculate the moles of titanium using the ratio of (4):

nTi = 2.86x10²³ / 6.02x10²³ = 0.475 moles

Now, let's calculate the mass using (3) and the molecular mass of titanium which is 47.867 g/mol:

m = 0.475 * 47.867 = 22.737 g

Let's replace this value in (2) to get the volume:

V = 22.737 / 4.5 = 5.053 cm³

Finally, the length using (1):

I = ∛5.053

I = 1.716 cm

This is the length of the cube

4 0

4 years ago

The ability of a substance to conduct electricity is called_______

trapecia [35]

Answer:

Electrical conductivity

Explanation:

Electrical conductivity - A material's ability to conduct electricity

5 0

3 years ago

A radioactive isotope, 14C decays to become 14N. After a time period of about 6,000 years, only about 12.5% of an original sampl

satela [25.4K]

Answer:

2000 years

Explanation:

A radioactive molecule will continuously decay and turn into another molecule. This nature of the radioactive molecule makes them can be used to estimate the age of an object. Half-life is the unit of time needed for radioactive molecules to decay to half of its mass. The formula for the mass remaining will be:

$N(t)= N_{0} (\frac{1}{2})^{\frac{t}{t_{1/2} } }$

Where

N(t)= number of the molecule remains

N0= number of molecule initially

t= time elapsed

t1/2= half time

We have all variable besides the half time, the calculation will be:

$N(t)= N_{0} (\frac{1}{2})^{\frac{t}{t_{1/2} } }$

$0.125= 1 (\frac{1}{2})^{\frac{6000}{t_{1/2} } }$

$(\frac{1}{8})= (\frac{1}{2})^{\frac{6000}{t_{1/2} } }$

$(\frac{1}{2})^3= (\frac{1}{2})^{\frac{6000}{t_{1/2} } }$

3= 6000/ (t1/2)

t1/2= 6000/3= 2000

The half-life is 2000 years

8 0

4 years ago

Which of the following is NOT possible? a. compressing 10 liters of oxygen gas into a 1-liter volume b. compressing 2 liters of

KonstantinChe [14]

Answer:b

Explanation:

8 0

3 years ago

Read 2 more answers

1. X-linked (also called sex-linked traits) are inherited on the _____ chromosome.

Alex Ar [27]

Answer:

Genes on the X chromosome are said to be X-linked. X-linked genes have distinctive inheritance patterns because they are present in different numbers in females (XX) and males (XY). X-linked human genetic disorders are much more common in males than in females due to the X-linked inheritance pattern.

Explanation:

3 0

3 years ago