All categories

4 years ago

A 5.00 gram sample of an oxide of lead PbxOy contains 4.33g of lead. Determine the simplest formula for the compound.

1 answer:

8 0

PbO2

You have to take the mass of lead in the problem, and divide by the molar mass.
When you do the same with oxygen, you get a number about twice as large as when you divide the mass of lead by the molar mass of lead. This means that the simplest formula would be PbO2

You might be interested in

Humans exhale carbon dioxide when they breathe. if the concentration of carbon dioxide in the air that people breathe gets too h

Finger [1]

The maximum number of people the shuttle can safely carry for one mission is 4.

3 0

3 years ago

Read 2 more answers

Select the correct answer. What is the enthalpy for the reaction represented in the following energy diagram? A. +200 kJ B. +350

Stella [2.4K]

Answer:

Option C. +150KJ

Explanation:

Data obtained from the question include:

Heat of reactant (Hr) = 200KJ

Heat of product (Hp) = 350KJ

Change in enthalphy (ΔH) =..?

The enthalphy of the reaction can be obtained as follow:

Change in enthalphy (ΔH) = Heat of reactant (Hp) – Heat of reactant (Hr)

ΔH = Hp – Hr

ΔH = 350 – 200

ΔH = +150KJ

Therefore, the enthalphy for the reaction above is +150KJ

6 0

3 years ago

The formula for the acetate ion is:

fiasKO [112]

Answer:

<h2>Formula of Acetaon Iron is:-</h2><h2 /><h2>(CH³)²CO</h2>

8 0

3 years ago

What type of bond is formed between a metal and a nonmetal?

Deffense [45]

The answer is b. ionic

5 0

3 years ago

In a piston, the volume was noticed to be 2.50 liters at 25°C. If the temperature rose to 55°C, what is the new volume?

GrogVix [38]

Answer:

The new volume is 2.75L

Explanation:

This is another case of Charles Gay Lussac law, where the volume varies directly proportional to T°, if the pressure keeps on constant.

V₁ / T₁ = V₂ / T₂

25°C + 273 = 298K

55°C + 273 = 328K

2.5L / 298K = V₂ / 328K

(2.5L / 298K) . 328K = V₂

2.75L = V₂

8 0

4 years ago

Read 2 more answers