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2 years ago

5

How does most ocean water return to the ocean in the water cycle? Through precipitation over the ocean By flowing through rivers

and streams Through runoff on Earth's surface By wind blowing water back to the ocean

1 answer:

andrey2020 [161]2 years ago

7 0

Surface run off and when water infiltrates land it will start to make its way to a body of water.

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aluminum has a specific heat of 0.897 j/g°C. how much heat is needed to raise the temperature of a 79 gram piece of aluminum 28°

frutty [35]

Answer:

Approximately 2000 J.

General Formulas and Concepts:

<u>Thermodynamics</u>

Specific Heat Formula: q = mcΔT

<em>q</em> is heat (in J)
<em>m</em> is mass (in g)
<em>c</em> is specific heat (in J/g °C)
ΔT is change in temperature (in °C or K)

Explanation:

<u>Step 1: Define</u>

<em>Identify variables</em>

[Given] <em>c</em> = 0.897 J/g °C

[Given] <em>m</em> = 79 g

[Given] ΔT = 28°C

[Solve] <em>q</em>

<em />

<u>Step 2: Solve for </u><em><u>q</u></em>

Substitute in variables [Specific Heat Formula]: q = (79 g)(0.897 J/g °C)(28 °C)
Multiply [Cancel out units]: q = (70.863 J/°C)(28 °C)
Multiply [Cancel out units]: q = 1984.16 J

<u>Step 3: Check</u>

<em>Follow sig fig rules and round. We are given 2 sig figs as our lowest.</em>

1984.16 J ≈ 2000 J

6 0

3 years ago

Calculate the molar mass of NH4NO3.

ozzi

Answer:

80.043 g/mol

Explanation:

Ammonium nitrate is a chemical compound, the nitrate salt of the ammonium cation. It has the chemical formula NH ₄NO ₃, simplified to N₂H₄O₃. It is a white crystalline solid and is highly soluble in water. It is predominantly used in agriculture as a high-nitrogen fertilizer.

7 0

3 years ago

Explain why the nucleus of an atom is positively charged but the overall charge of an atom is neutral

luda_lava [24]

Answer:

sorry

Explanation:

i'm not a chemistry student

but let me try

it is because the neutron of an atom is -

why the proton and electron is +and- (positive and negative)

so + and - = 0

4 0

3 years ago

In Mendelian genetics, when a tall plant is crossed with a short plant, the offspring will be:

Annette [7]

Some offspring may be tall, some may be short, and some may be medium medium sized.

3 0

3 years ago

Read 2 more answers

QUESTION 51 Buffer capacity is best defined as: OA) Buffer capacity is the amount of acid or base that can be added to a buffer

Schach [20]

Answer:

The best definition is: "Buffer capacity is the amount of acid or base that can be added to a buffer without destroying its effectiveness"

Explanation:

A buffer is a solution that is somewhat resist to pH changes by reacting with acids and bases that may be added into the solution. It's capacity is the amounto of acid or base that can be added into solution without much change in pH.

So the best definition is: "Buffer capacity is the amount of acid or base that can be added to a buffer without destroying its effectiveness"

4 0

3 years ago