25 POINTS! Which traits are characteristic of both single-celled and multicellular organisms? Choose all answers that are correct. A. contain organs that help them survive B. have metabolism C. can reproduce a whole colony in a matter of hours D. have ability to reproduce

Answers

Answer 1

Answer: The answer is d. The answer is that because both of them can reproduce that way.

Answer 2

Answer: D. Have ability to reproduce

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Which statement about isotopes is correct?Isotopes are different elements with different numbers of protons but the same number of neutrons.Isotopes are the same element with different numbers of protons and different numbers of neutrons.Isotopes are the same element with the same number of protons but different numbers of neutrons.
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what is the ratio of the rate of effusion of helium (atomic mass 4.00 amu) to that of oxygen gas (molecular mass 32.0 amu)?

Answers

Answer:

3 : 1

Explanation:

Let the rate of He be R1

Molar Mass of He (M1) = 4g/mol

Let the rate of O2 be R2

Molar Mass of O2 (M2) = 32g/mol

Recall:

R1/R2 = √(M2/M1)

R1/R2 = √(32/4)

R1/R2 = √8

R1/R2 = 3

The ratio of rate of effusion of Helium to oxygen is 3 : 1

Which particles make up the nucleus of an atom? A. protons and electrons B. neutrons and electrons C. protons only D. protons and neutrons E. neutrons only

Answers

The correct answer is option D, that is, protons and neutrons.

The center of an atom is known as the nucleus, it comprises nucleons, that is, neutrons and protons, and is enveloped by the cloud of electrons. The nucleus exhibits the majority of the mass of the atom in spite of being a very small constituent of the atom. Approximately all the atom's mass is formed of the neutrons and protons in the nucleus with a very small donation from the orbiting electrons.

Which is the properly balanced equation for the process in which iron oxide (Fe2O3) and carbon monoxide (CO) react to produce iron (Fe) and carbon dioxide (CO2) gas?A.
Fe2O3 + CO → Fe + CO2

B.
Fe2O3 + 3CO → 2Fe + 3CO2

C.
2Fe2O3 + 3CO → 2Fe + 3CO2

D.
3Fe2O3 + CO → 3Fe + 2CO2

Answers

B. Fe2O3 +3CO --> 2Fe + 3CO2

Fe has 2, Fe2 ---> 2Fe
O has 6, O3 + 3O (3+3=6) ---> 3(O2)(3x2=6)
C has 3, (3C --> 3C)

none of the other equations make sense:
In A, Fe on the left has 2 while Fe on the right has 1(so you can eliminate that.)
in C, Fe on the left has 4 (2x2) while Fe on the right has 2.(eliminate this too.)
in D, Fe on the left has 6 (3x2) and Fe on the right has 3 (eliminate this)

When butter is heated it melts and when that melted butter cools and solidifies the process called

Answers

I'm pretty sure it is called condensation

What must occur before clouds can form?

Answers

Condensation must occur.

condensation of water vapor also the water vapor must lose heat energy

Which of the following is the best name for a compound made from calcium and bromine? (CaBr2) calcium bromide calcium dibromide monocalcium dibromide calcium bromine II

Answers

Answer:

Calcium bromide

Explanation:

When naming compounds, the use of prefixes depend on the type of bond made. In this case, calcium and bromine form a ionic bond because calcium is a metal and bromine is a non-metal.

Ionic bonds are not named using prefixes. So no matter how many atoms there are, you will simply write the name of the element for the first element.

For the second element, you name it as well, but only use the root name and end it with -ide.

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