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
Marysya12 [62]
3 years ago
7

Animals need various nutrients in order to live and grow. Nitrogen, for example, is a nutrient that is needed to form molecules

found in genetic material. How do animals obtain nitrogen? A. They eat plants which have absorbed nitrogen from the soil. B. They create nitrogen in their bodies using other nutrients as building blocks. C. They breathe in and absorb nitrogen gas from the atmosphere. D. all of these
Chemistry
1 answer:
Ad libitum [116K]3 years ago
8 0

Answer:

It's A

Explanation:

Animals get the nitrogen they need by eating plants or other animals that contain nitrogen. When organisms die, their bodies decompose bringing the nitrogen into soil on land or into ocean water. Bacteria alter the nitrogen into a form that plants are able to use.

You might be interested in
A plasma-screen TV contains thousands of tiny cells filled with a mixture of Xe, Ne, and He gases that emits light of specific w
alisha [4.7K]

Answer:

(a) 1.77*10^15 Xe atoms

(b) 2.10*10^16 Ne atoms

(c) 2.10*10^16 He atoms

Explanation:

Total V = 0.900 mm * 0.300mm * 10.0mm

Total V = 2.7mm cubed

Converting cubed to litres:

2.7mm cubed = 2.7 * 10^-6 Liters

Converting pressure from torr to atm,

(500 torr) * (1 atm ÷ 760 torr) = 0.6578947368 atm

Room temperature is assumed to be 21 degrees celcius, or 294.15 Kelvin

Applying Ideal Gas Equation:

PV = nRT

Therefore, n = PV ÷ RT,

n = [(2.7*10^-6 Liters)(.6578947368 atm)] ÷ [(0.08206)(294.15)]

n = 7.359017079 * 10^-8

Therefore, the total moles present in plasma is 7.359017079 * 10^-8.

(a) To find Xe atoms,

Multiply the total moles present by 4 percent. Therefore,

(7.359017079 * 10^-8)(.04) = 2.943606832*10^-9,

this value gives you Xe moles.

Then multiply by Avogadro's constant:

[(2.943606832*10^-9)(6.022*10^23)] = 1.77*10^15 Xe atoms

(b) and (c) are the same.

Using the total moles number we found in the beginning and minus the number of moles for Xe.

We have:

7.359017079 * 10^-8 - 2.943606832*10^-9 = 7.064656396*10^-8

And Since Ne and He are in a 1:1 ratio, divide this number by two.

We have:

7.064656396*10^-8 ÷ 2 = 3.532328198*10-8 moles

By multiplying this number by Avogadro's number we get atoms:

[(3.532328198*10-8 moles)(6.022*10^23)] = 2.10*10^16

Therefore, the answer for both (b) and (c) is 2.10*10^16.

4 0
3 years ago
What causes the differences in physical characteristics like hair color among people?
kari74 [83]
Different versions of genes
8 0
3 years ago
Read 2 more answers
For the reaction VCl2 + Cl2 → VCl5, what are the reactants, products, and correct coefficients in the balanced equation?
mafiozo [28]

Answer is: Reactants: 2VCl2 and 3Cl2; product: 2VCl5.

Balanced chemical reaction: 2VCl₂ + 3Cl₂ → 2VCl₅.

According to principle of mass conservation, number of atoms must be equal on both side of chemical reaction.

There are ten chlorine atoms and two vanadium atoms on both side of balanced chemical reaction.

3 0
3 years ago
1. Is mass conserved when 50 g of sugar undergoes a physical change? Use complete sentences to support your answer by explaining
sweet-ann [11.9K]
The law of conservation of mass applies to both cases, the following will explain how:

1. When 50 g of sugar undergoes a physical change, say for example dissolving or melting, the amount of sugar in the solution or melted form will also be 50 grams. This shows that the mass before and after the change was the same, in accordance to the law of conservation of mass.

2. When the magnesium strip is burned, this is a chemical reaction. The problem is that we only measure the mass of one of the substances involved in the reaction, the magnesium strip, which makes it seem like the mass has increased. Actually, during burning, the magnesium combines with oxygen in the air. This oxygen was present before the reaction, we just did not measure it. And after the reaction it is present in the form of product. Therefore, mass is still conserved.
6 0
3 years ago
Which of the following is most likely a homogeneous mixture?
Shtirlitz [24]

Answer:A vanilla milkshake

Explanation: A homogeneous mixture is a mixture that is equal in all parts. A tossed salad may have some parts with more lettuce. A chocolate chip cookie might have more chocolate chips in one area. And chunky peanut butter is... well... chunky.

8 0
3 years ago
Read 2 more answers
Other questions:
  • Colin is writing a story in which a spy damages a fusion nuclear reactor, the reaction runs out of control, and the reactor expl
    12·2 answers
  • What is the mass of an 80 mL aliquot of a solution with a density of 5.80<br> g/mL?
    7·1 answer
  • The orbits of asteroids are found primarily between
    11·1 answer
  • "sticky ends" allow dna fragments to be spliced into vectors by what type of bonding?
    9·1 answer
  • How is E. coli like a paramecium? A: Both are single-celled. B: Both produce essential vitamins. C: Both have a nucleoid. D: Bot
    13·1 answer
  • HELP PLEASE: Increasing ____ raises the boiling point of a liquid.
    14·2 answers
  • Which of the following accurately describes circuits?
    15·2 answers
  • ASAP PLEASE I NEED TO BALANCE THEM PLZ HELP IM FAILING THANKS ILL GIVE BRAINLIEST
    5·1 answer
  • A sample of a certain isotope has an initial activity of 40,000 cpm. After 24.8 days, the activity is 2500 cpm. What is the half
    15·1 answer
  • You hav to watch the video i don’t understand number 1 what to do help
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!