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3 years ago

4

Chemistry

2 answers:

saveliy_v [14]3 years ago

7 0

Answer:

Is A- Carbon Dioxide

Explanation:

other air pollutants collect in the atmosphere and absorb sunlight and solar radiation that have bounced off the earth's surface.

Llana [10]3 years ago

3 0

Answer:Carbon dioxide would be your best choice.

Explanation:

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4. If you put 1 mL of coffee into 9 mL of water, how much was the coffee diluted?

garri49 [273]

1 in 10, or 1/10, or 0.1 dilution factor It may be wrong but this is what I have!

7 0

3 years ago

Read 2 more answers

What is the excess reactant for the following reaction given we have 3.4 moles of Ca(NO3)2 and 2.4 moles of Li3PO4? Reaction: 3C

Yuki888 [10]

<u>Answer:</u> The excess reactant for the given reaction is $Li_3PO_4$

<u>Explanation:</u>

Limiting reagent is defined as the reagent which is present in less amount and it limits the formation of products.

Excess reagent is defined as the reagent which is present in large amount.

For the given chemical reaction:

$3Ca(NO_3)_2+2Li_3PO_4\rightarrow 6LiNO_3+Ca_3(PO_4)_2$

We are given:

Moles of calcium nitrate = 3.4 mol

Moles of lithium phosphate = 2.4 mol

By stoichiometry of the reaction:

3 moles of calcium nitrate reacts with 2 moles of lithium phosphate

So, 3.4 moles of calcium nitrate will react with = $\frac{2}{3}\times 3.4=2.27mol$ of lithium phosphate

As, the given amount of lithium phosphate is more than the required amount. So, it is considered as an excess reagent.

Thus, calcium nitrate is considered as the limiting reagent because it limits the formation of products.

Hence, the excess reactant for the given reaction is $Li_3PO_4$

7 0

3 years ago

What is 5 real-life examples of specific heat?

olga2289 [7]

Boiling poitns of elements

7 0

4 years ago

Read 2 more answers

The osmotic pressure of a solution formed by dissolving 75.0 mg of aspirin (c9h8o4) in 0.250 l of water at 25 °c is ________ atm

Igoryamba

Answer is: the osmotic pressure of aqueous solution of aspirin is 0.0407 atm.

m(C₉H₈O₄) = 75 mg ÷ 1000 mg/g = 0.075 g.

n(C₉H₈O₄) = 0.075 g ÷ 180.16 g/mol.

n(C₉H₈O₄) = 0.000416 mol.

c(C₉H₈O₄) = 0.000416 mol ÷ 0.250 L.

c(C₉H₈O₄) = 0.00167 M; concentration of solution.

T(C₉H₈O₄) = 25°C = 298.15 K; temperature in Kelvins.

R = 0.08206 L•atm/mol•K; universal gas constant.

π = c(C₉H₈O₄) • T(C₉H₈O₄) • R.

π = 0.00167 mol/L • 298.15 K • 0.08206 L•atm/mol•K.

π = 0.0407 atm.

3 0

4 years ago

Which statement best describes the electrons in this illustration?

ololo11 [35]

Answer:

Statement 3 is correct. the electrons are negatively charged particles located outside the nucleus

Explanation:

Step 1: Data

Electrons = Electrons are subatomic particles.

⇒They (usually) are negative charged.

⇒They are situated outside the nucleus.

⇒They are much smaller than the nucleus of the atom. (neutrons and protons)

Protons

⇒They (usually) are positive charged.

⇒They are situated inside the nucleus.

Neutrons

⇒They (usually)do not have a charge = neutral

⇒They are situated inside the nucleus.

Step 2:

1. the electrons are positively charged particles located outside the nucleus

⇒ False. Electrons are negative charged

2. the electrons are positively charged particles located inside the nucleus

⇒ False Electrons are negative charged and outside the nucleus

3. the electrons are negatively charged particles located outside the nucleus

⇒ This statement is TRUE

4. the electrons are negatively charged particles located inside the nucleus

⇒False. Electrons are located outside the nucleus

Statement 3 is correct. the electrons are negatively charged particles located outside the nucleus

5 0

4 years ago