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3 years ago

SUPPER EASY WILL GIVE BRAINLIEST NEED HELP ASAP

Chemistry

2 answers:

vfiekz [6]3 years ago

8 0

Answer:

Explanation:

You can tell when a chemical change occurs if a gas is produced (bubbles), an odor is produced, if there is a color change, or if the surroundings get hotter or colder.

emmainna [20.7K]3 years ago

7 0

Answer:

Your answer will be (D).

Hope this helps!

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A sample of a gas in a 4L container at 300K has a pressure of 1 atm. If the

zavuch27 [327]

The final pressure of the gas in the container is 4 atm

From the question given above, the following data were obtained:

Initial volume (V₁) = 4 L

Initial temperature (T₁) = 300 K

Initial pressure (P₁) = 1 atm

Final temperature (T₂) = 600 K

Final volume (V₂) = 2 L

<h3>Final pressure (P₂) =?</h3>

Using the combine gas equation, we can obtain the final pressure of the gas as illustrated below:

$\frac{P_{1} V_{1} }{T_{1}} = \frac{P_{2} V_{2}}{T_{2}}\\\\\frac{1 * 4}{300} = \frac{P_{2} * 2}{600} \\\\$

Cross multiply

300 × 2 × P₂ = 4 × 600

600 × P₂ = 2400

Divide both side by 600

$P_{2} = \frac{2400}{600} \\\\$

Therefore, the final pressure of gas is 4 atm.

Learn more: brainly.com/question/23558057

4 0

3 years ago

What kind of charge does a cation have

Ainat [17]

I believe it has a positive
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6 0

3 years ago

Read 2 more answers

What is the main cause of increased erosion

anyanavicka [17]

The main cause of increased erosion is natural elements like rain, wind and ice. Erosion is the process by which the surface of the Earth gets worn down.
Soil erosion is also a big thing, it is caused by mostly rain that contributes to floods. This stuff is bad for farmers because they do a lot of farming and with erosion increasing the growing crops are decreasing because of erosion.

6 0

3 years ago

URGENT!!!What volume of a 0.88 M solution can be made using 130. Grams of FeCI^2?

Likurg_2 [28]

Answer:

1.16L can be made

Explanation:

Molarity = Mol / Volume

Volume = Mol / Molarity

Let's determine the moles of salt, with that mass:

130 g FeCl₂ . 1mol / 126.75 g = 1.02 moles of FeCl₂

Volume = 1.02 mol / 0.88 mol/L → 1.16L

5 0

3 years ago

In acidic solution, the nitrate ion can be used to react with a number of metal ions. One such reaction is NO3−(aq)+Sn2+(aq)→NO2

katrin [286]

Answer:

$\boxed{\text{2, 1, 4, 2, 1, 2}}$

Explanation:

NO₃⁻ + Sn²⁺ + __ → NO₂ + Sn⁴⁺ + __

Step 1: Separate into two half-reactions.

NO₃⁻ ⟶ NO₂

Sn²⁺ ⟶ Sn⁴⁺

Step 2: Balance all atoms other than H and O.

Done

Step 3: Balance O.

NO₃⁻ ⟶ NO₂ + H₂O

Sn²⁺ ⟶ Sn⁴⁺

Step 4: Balance H

NO₃⁻ + 2H⁺ ⟶ NO₂ + H₂O

Sn²⁺ ⟶ Sn⁴⁺

Step 5: Balance charge.

NO₃⁻ + 2H⁺ + e⁻ ⟶ NO₂ + H₂O

Sn²⁺ ⟶ Sn⁴⁺ + 2e⁻

Step 6: Equalize electrons transferred.

2 × [NO₃⁻ + 2H⁺ + e⁻ ⟶ NO₂ + H₂O]

1 × [Sn²⁺ ⟶ Sn⁴⁺ + 2e⁻]

Step 7: Add the two half-reactions.

2 × [NO₃⁻ + 2H⁺ + e⁻ ⟶ NO₂ + H₂O]

2NO₃⁻ + Sn²⁺ + 4H⁺ ⟶ 2NO₂ + Sn⁴⁺ + 2H₂O

Step 8: Check mass balance.

On the left: 2 N, 6 O, 1 Sn, 4H

On the right: 2 N, 6 O, 1 Sn, 4H

Step 9: Check charge balance.

On the left: -2 + 6 = +4

On the right: +4

The equation is balanced.

$\text{The coefficients are }\boxed{\textbf{2, 1, 4, 2, 1, 2}}$

4 0

4 years ago