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stealth61 [152]

3 years ago

7

1. What pressure, in atmospheres, is required to reduce 60.0 mL of a gas at standard conditions to 10.0 mL at a temperature of 2

5.0°C?

1 answer:

valentinak56 [21]3 years ago

4 0

Combined Gas law, p1=1atm,v1=60mL, t1=273k and then set that equal to p2=x atm, v2=10 mL and t3=298k

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Phosphoric acid is a polyprotic acid. Write balanced chemical equations for the sequence of reactions that phosphoric acid can u

Lesechka [4]

Phosphoric acid is a polyprotic acid. Write balanced chemical equations for the sequence of reactions that phosphoric acid can undergo when it's dissolved in water is given below

Explanation:

Many acids contain two or more ionizable hydrogens. There are two in carbonic acid, H₂CO₃, and three in phosphoric acid, H ₃PO ₄. For any such multiple hydrogen acid, the first hydrogen is most easily removed, and the last hydrogen is removed with the greatest difficulty. These acids are called polyprotic (many protons) acids. The multiple acid ionization constants for each acid measure the degree of dissociation of the successive hydrogens.

Step 1

Polyprotic acid is an acid that can donate two or more H+ ion per molecule. Sulfurous acid donates two hydrogen ions in an aqueous solution.

Step 2

Dissociation of sulfurous acid in aqueous solution takes place in two steps. In the first step, one H⁺ ion is donated during dissociation forming HSO₃⁻.

H₂SO₃₍aq₎ +H₂O₍₁₎→HSO₃⁻₍aq₎

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Step 3

In the second step, one H+ ion is donated from HSO3- ion f...

H₂SO₃₍aq₎ +H₂O₍₁₎→SO₃²⁻₍aq₎+H₃O⁺₍aq₎

5 0

3 years ago

Most warm-water ocean currents move away from the equator and toward the poles because warm water is driven by ______ from _____

aksik [14]

convection; hot; cold

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6 0

4 years ago

From the data table given, calculate the missing quantity

ololo11 [35]

<u>Answer:</u> The initial volume of the gas is 16.55 mL

<u>Explanation:</u>

To calculate the final temperature of the system, we use the equation given by Charles' Law. This law states that volume of the gas is directly proportional to the temperature of the gas at constant pressure.

Mathematically,

$\frac{V_1}{T_1}=\frac{V_2}{T_2}$

where,

$V_1\text{ and }T_1$ are the initial volume and temperature of the gas.

$V_2\text{ and }T_2$ are the final volume and temperature of the gas.

We are given:

$V_1=?mL\\T_1=300K\\V_2=16mL\\T_2=290K$

Putting values in above equation, we get:

$\frac{V_1}{300K}=\frac{16mL}{290K}\\\\V_1=\frac{16\times 300}{290}=16.55mL$

Hence, the initial volume of the gas is 16.55 mL

4 0

4 years ago

Find the number of moles in 1.00 x 1023 atoms of chromium.

IRISSAK [1]

Answer:

<h2>0.17 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

$n = \frac{N}{L} \\$

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

We have

$n = \frac{1.00 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{1}{6.02} \\ = 0.166112$

We have the final answer as

<h3>0.17 moles</h3>

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Greeley [361]

B, the height above or below sea level

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3 years ago