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3 years ago

I wanna make sure of my answer

Chemistry

1 answer:

Juliette [100K]3 years ago

5 0

Answer:

A) the charge on the ion of X

Explanation:

All group 3 elements have a charge of positive three

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A 18.77 g sample of a compound contains 5.99 g of potassium, K, 5.43 g of chlorine, Cl, and oxygen, O. Calculate the empirical f

evablogger [386]

The empirical formula of the compound is KClO₃.

<h3>Empirical formula </h3>

This is the simplest structural formula a compound can have.

The given mass of the elements;

potassium, K = 5.99 g

chlorine, Cl = 5.43 g

oxygen, O = 18.77 g - (5.99 + 5.43)g = 7.35 g

The empirical formula of the compound is calculated as follows;

$K: \ \ \frac{5.99}{39} = 0.15 \\\\Cl: \ \ \frac{5.43}{35.5} = 0.15\\\\O: \ \ \frac{7.35}{16} = 0.46$

<em>Divide through by the smallest fraction;</em>

$K: \ \frac{0.15}{0.15} = 1\\\\Cl: \ \frac{0.15}{0.15} =1 \\\\O: \ \frac{0.46}{0.15} = 3$

empirical formula = KClO₃

Learn more about empirical formula here: brainly.com/question/1603500

7 0

3 years ago

To change state from gas to a liquid

Nostrana [21]

I believe the answer is condensation, correct me if I'm wrong

4 0

3 years ago

A sample of gas in a balloon has an initial temperature of 20. ∘C and a volume of 1.92×103 L . If the temperature changes to 68

morpeh [17]

Answer:

$\boxed{2.23 \times 10^{3} \text{ L}}$

Explanation:

The pressure is constant, so we can use Charles' Law.

$\dfrac{ V_{1} }{T_{1}} = \dfrac{ V_{2} }{T_{2}}$

Data:

V₁ = 1.92 × 10³ L; T₁ = 20 °C

V₂ = ?; T₂ = 68 °C

Calculations:

(a) Convert temperatures to kelvins

T₁ = (20 + 273.15) K = 293.15 K

T₂ = (68 + 273.15) K = 341.15 K

(b) Calculate the volume

$\dfrac{ 1.92 \times 10^{3}}{293.15} = \dfrac{ V_{2}}{341.15}\\\\6.550 = \dfrac{ V_{2}}{341.15}\\\\V_{2} = 6.550 \times 341.15 = 2.23 \times 10^{3} \text{ L}$

The new volume of the gas is $\boxed{2.23 \times 10^{3} \text{ L}}$ .

6 0

3 years ago

The pH of a solution is measured to be pH=10. What is true of this solution?

Marta_Voda [28]

Answer:

a. the solution is a base

Explanation:

The pH range is between 0 to 14.

A solution with a pH value between 0 and 6 is said to be acidic.

A solution with pH value at 7, is said to be neutral, e.g., distilled water.

A solution with pH value between 8 and 14 is a base.

Given pH = 10, a pH value of 10 falls between the base or alkali range of the indicator

8 0

4 years ago

What mass of silver can be plated onto an object in 33. 5 minutes at 8. 70 a of current? ag (aq) e- → ag(s) 19. 6 g 9. 78 g 0. 3

grandymaker [24]

Mass of silver can be plated onto an object in 33. 5 minutes at 8. 70 a of current is 19.55 g

Given, I=8.70A, t=33.5min=33.5*60=2010 sec, m of Ag = 19600g M=107.87 g/mol

From faradays law we can write q=I*t= 8.70*2010=17487 C.

moles of Ag =17487/ 19600=0.1812 moles

Ag deposited = 0.1812*107.87 = 19.55 g

<h3>Silver </h3>

Having the atomic number 47 and the Latin word argentum, which means "bright" or "white," silver is a chemical element. Its symbol is Ag. The highest electrical, thermal, and reflectivity of any metal are displayed by this transition metal, which is soft, white, and lustrous. The metal can be found in the Earth's crust in three different forms: as an alloy with other metals like gold and in minerals like argentite and chlorargyrite. It can also be found in its pure, free elemental form, also known as "native silver." During the refining of copper, gold, lead, and zinc, the majority of silver is created as a byproduct. As a valuable metal, silver has long been treasured.

What mass of silver can be plated onto an object in 33. 5 minutes at 8. 70 a of current? ag (aq) e- → ag(s) 19. 6 g 9. 78 g 0. 326 g 3. 07 g 0. 102 g

Learn more about Silver here:

brainly.com/question/14587716

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4 0

2 years ago