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3 years ago

Can someone help me??

Chemistry

2 answers:

Lubov Fominskaja [6]3 years ago

8 0

Answer: B. ridge push and slab pull

Explanation: Took the test.

Kryger [21]3 years ago

6 0

Answer:

I do K12 and c is correct!

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Acid rain is produced when _______ mixes with the water of a raindrop.

goldfiish [28.3K]

The answer should be B - Nitrogen Dioxide.

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3 years ago

if a drop of blood is 0.05 mL, how many drops of blood are in a blood collection tube that holds 6 mL?

TiliK225 [7]

There would need to be 120 drops of blood to fill a tube that can hold 6 mL.

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3 years ago

Why does ionization energy tend to increase as you move across a period

koban [17]

It tends to in increase because the size of the atoms increase.

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3 years ago

At a festival, spherical balloons with a radius of 280. Cm are to be inflated with hot air and released. The air at the festival

evablogger [386]

Answer:

8608.18 balloons

Explanation:

Hello! Let's solve this!

Data needed:

Enthalpy of propane formation: 103.85kJ / mol

Specific heat capacity of air: 1.009J · g ° C

Density of air at 100 ° C: 0.946kg / m3

Density of propane at 100 ° C: 1.440kg / m3

First we will calculate the propane heat (C3H8)

3000g * (1mol / 44g) * (103.85kJ / mol) * (1000J / 1kJ) = 7.08068 * 10 ^ 6 J

Then we can calculate the mass of the air with the heat formula

Q = mc delta T

m = Q / c delta T = (7.08068 * 10 ^ 6 J) / (1.009J / kg ° C * (100-25) ° C) =

m = 93566.96kg

We now calculate the volume of a balloon.

V = 4/3 * pi * r ^ 3 = 4/3 * 3.14 * 1.4m ^ 3 = 11.49m ^ 3

Now we calculate the mass of the balloon

mg = 0.946kg / m3 * 11.49m ^ 3 = 10.87kg

The amount of balloons is

93566.96kg / 10.87kg = 8608.18 balloons

5 0

3 years ago

Read 2 more answers

Which is the most accurate description of compounds?

baherus [9]

Answer: c.They have a unique set of properties that can be used as identifiers.

Explanation:

Compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass.

Compounds can be decomposed into simpler constituents using chemical reactions.

Example: Water $(H_2O)$

$2H_2O\rightarrow 2H_2+O_2$

Compounds have different properties than the elements it is made up of.

Thus the most accurate description of compounds is that they have a unique set of properties that can be used as identifiers.

3 0

3 years ago