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
pentagon [3]
3 years ago
11

Celestial object A is composed of 92.1 percent hydrogen and 7.8 percent helium while celestial object B is made up of ice, froze

n carbon dioxide, rock, and dust. What is celestial object A? A. asteroid B. comet C. dwarf planet D. black hole E. star
Chemistry
1 answer:
Andrew [12]3 years ago
5 0

Answer:

star

Explanation:

stars are composed of 92.1 percent hydrogen and 7.8 percent helium.

You might be interested in
Explain how natural resources are identified and why natural resources are unevenly distributed.
slava [35]

Answer:

Natural resources are naturally formed of course(wood copper fruits) and they are not distributed evenly due to competition of getting them and the prices of the resources

Explanation:

5 0
3 years ago
NEED HELP ASAP ITS DUE TODAY THESE QUESTIONS
beks73 [17]

1.

Density can be defined as the mass of the substance in unit volume.

Density = mass / volume

Hence, g/mL and kg/L can be used as the units of density.

Those units are interchangeable because when converting one unit into other one nothing will happen to the value.

That is because when converting the g into kg, you have to multiply the value by 1 x 10⁻³. When converting mL into L, you should again multiply the volume by 1 x 10⁻³. Then those 1 x 10⁻³ will cancel off and the original value will remain as same.

2.

Answer is 2.70 g/mL.

<em>Explanation;</em>

Mass of the block = 146 g

Volume of the block =  length x width x height

                                  = 6.0 cm x 3.0 cm x 3.0 cm

                                  = 54 cm³ = 54 mL

Density = mass / volume

            = 146 g / 54 mL

            = 2.70 g/mL

3.

Answer is  3.39 g/mL.

<em>Explanation;</em>

When immersing an object in a solution, the increased volume indicates the volume of that object.

Hence,

  Volume of the object = increased volume of water level

                                      = final volume - initial volume

                                      = 27.8 mL - 21.2 mL

                                      = 6.6 mL

Mass of the object = 22.4 g

Density = Mass / Volume

            = 22.4 g / 6.6 mL

            = 3.39 g/mL

4.

Accepted value is the value that scientists and community accept as true. This is a theoretical value.

But the measured value is the value that you obtain from doing experiments. This is the actual value.

If your measured value is more close to the accepted value, then your measured value is more precise. But, if your measured value is far away from accepted value means that your value is not precise and there may have some errors.

5.

Answers : Percent error is 9.11 %

                 The element which has 7.13 g/cm³ as density is Zinc (Zn).

<em>Explanation;</em>

Percent error can be calculated by using following formula.

% error = ( (measured value - accepted value) / accepted value ) x 100%

            = ( (7.78 g/cm³ - 7.13 g/cm³) / 7.13 g/cm³ ) x 100%

            = 9.11 %

6 0
3 years ago
Which equation is used to help form the combined gas law?<br> eP, V, P, V, т.
alexdok [17]

Answer:

The combined gas law is formulated from PV/T =K.

Explanation:

The combined gas law comprises of Boyle's law, Charles's law and Gay lusaac's law. This laws were not discovered but simply put together considering other cases of ideal gas law. It states that if the amount of gas is left unchanged, the ratio between the pressure, volume, and temperature is constant.

7 0
3 years ago
Câu 36: _VD _Hình lập phương có thể tích là 1253 thì diện tích đáy là:
Gnesinka [82]

Answer:

c

Explanation:

5 0
3 years ago
Read 2 more answers
Vegetarian diets can provide high levels of antioxidants and a lipid profile that can help prevent coronary disease. However, th
Arada [10]

Answer:

The correct option is: "Vitamin B12 (cobalamin) is not found in the vegan diet and is very low in the lacto-vegetarian diet"

Explanation:

Homocysteine is a VERY IMPORTANT type of amino acid, a chemical that the body uses to make proteins. Normally, vitamin B12, vitamin B6, and folic acid break down homocysteine and transform it into other substances that the body needs. There should be very little homocysteine left in the bloodstream. If you have high homocysteine levels in your blood, that could be a sign of a vitamin deficiency of the vitamins listed above, a heart condition, or a rare inherited disorder.

8 0
3 years ago
Read 2 more answers
Other questions:
  • Vitellium (Vi) has the following composition:
    12·1 answer
  • A 5.0 gram sample of Ag2SO4, will dissolve in 1.0 L of water. Calculate the solubility product
    12·1 answer
  • How do you express 0.00026 in scientific notation
    12·2 answers
  • The nuclear product of radioactive decay is called the_
    15·1 answer
  • What is the total value of a small digit in 94257<br>​
    13·2 answers
  • This is a graph of the mean, or average, number of
    14·1 answer
  • How do hospitals depend on oil?
    14·2 answers
  • From previous experiments, this chemical reaction is known to absorb of energy. The position of the piston is monitored, and it
    6·1 answer
  • Please help ill give brainliest
    10·2 answers
  • How many grams would 3.98 x 10^24 atoms of oxygen weigh
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!