A 150 g sample of a compound is comprised of 44% C, 9% H and the remainder is O by mass. What is the compound's empirical formul

Answer:

The revised net worth rounded to three significant figures is $80.2 billion.

The donation to charity amounts to $100,250,000.

Explanation:

Initial net worth is $77.0 billion.

Stock gains are $3.20 billion.

Calculating new net worth: $77.0 billion + $3.20 billion = $80.20 billion.

Hence, new net worth to three significant figures is $80.2 billion.

One-eighth of a percent is calculated as (1/8 x 1) / 100 = 0.00125.

The charitable contribution amounts to 0.00125 X $80.2 billion = $100,250,000.

Alternatively, $80,200,000,000 divided by 100 results in $802,000,000.

Answer:

• A. Which element, X or Z, has a higher molar mass?

Explanation:

Heating the original compounds intensely to remove all oxygen causes chemical decomposition reactions:

• 2XClO₃ (solid) → 2XCl + 3O₂ (gas)

• 2ZClO₃ (solid) → 2ZCl + 3O₂ (gas)

By measuring the initial mass of each sample and the mass remaining after heating, the student can compute the oxygen gas mass released:

• Mass of oxygen released = initial sample mass minus residue mass

Using this oxygen mass, she can calculate how many moles of oxygen were present in each sample:

• Moles of oxygen = oxygen mass (g) divided by molar mass of oxygen

Next, the moles of the original sample are determined:

• Each mole of XClO₃ or ZClO₃ has 3 moles of oxygen atoms.

So, dividing the moles of oxygen released by 3 gives the moles of the sample.

Applying the formula molar mass = mass / moles, the student finds the molar masses of XClO₃ and ZClO₃.

Thus, this data allows answering question A: Which of X or Z has the higher molar mass?

Answer:

B) Δ[C]/Δt = 3.60x10⁻² M⁻¹s⁻¹ [A] [B]

Explanation:

For the reaction A + B → C

The expression for the reaction's rate is:

Δ[C]/Δt = k [A] [B]

Utilizing the values for [A], [B], and Δ[C]/Δt, multiply [A] by [B] to acquire a value of X and consider Δ[C]/Δt as Y. The slope derived from this linear regression will yield k.

Therefore, the results you should have are:

y = 3.60x10⁻² X

Thus, the reaction's rate is:

B) Δ[C]/Δt = 3.60x10⁻² M⁻¹s⁻¹ [A] [B]

I hope this assists you!