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klemol [59]
4 years ago
7

The ash produced by the burning paper has much less mass than the mass of the original paper. Was mass conserved during this cha

nge? Explain your answer.
Chemistry
1 answer:
lbvjy [14]4 years ago
5 0
<span>Mass was not conserved during this change. When paper burns, oxygen from the air combines with carbon and hydrogen from the paper in a chemical reaction to produce CO2 and water vapour. These waft away after the burning, just like smoke. Therefore, the paper has a lighter mass, because some of the mass it held before (from the carbon and hydrogen) has been lost.</span>
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A solution of iron(III) chlorate was poured into a lithium phosphate solution. Would you expect a precipitate to form if 354.0 m
Artist 52 [7]

Answer:

K. Yes, because Qsp > Ksp for iron(III) phosphate

Explanation:

Lithium chlorate is very soluble in water, that means has a big ksp.

Iron (III) phosphate has a ksp of 1.3x10⁻²²

Ksp formula of iron (III) phospate is:

FePO₄(s) ⇄ Fe³⁺(aq) + PO³⁻(aq)

Ksp = [Fe³⁺] [PO₄³⁻] = 1.3x10⁻²²

Molar concentration of Fe³⁺ and PO₄³⁻ is:

[Fe³⁺] = 0.340L ₓ (2.52x10⁻⁹mol / L) ÷ (0.354L + 0.520L) = <em>9.8x10⁻¹⁰M</em>

[PO₄³⁻] = 0.520L ₓ (4.65x10⁻¹¹mol / L) ÷ (0.354L + 0.520L) = 2.78<em>x10⁻¹¹M</em>

Replacing in Ksp formula:

Qsp = [9.8x10⁻¹⁰] [2.78x10⁻¹¹M] = 2.72x10⁻²⁰

As Qsp > Kps, the equlibrium will shift to the right decreasing the ions concentrations producing FePO₄(s), <em>a precipitate</em>

<em>The ions decreases its concentration until Q = Kps</em>

<em />

Thus, right answer is:

<em>K. Yes, because Qsp > Ksp for iron(III) phosphate </em>

6 0
3 years ago
What is the molar mass of magnesium
mina [271]

Hey there!

The molar mass of magnesium is 24.305 grams.

The molar mass of an element is the same as the atomic mass of an element, but measured in grams.

It's on the periodic table underneath the element symbol.

Hope this helps!

3 0
3 years ago
What would happen if a lighted match stick is placed at the mouth of a jar of ethyne gas ?
egoroff_w [7]

Answer:

I help u after my online class

Explanation:

wAIT my help

4 0
3 years ago
On a .75-meter table sits a book whose mass is .5 kilograms. How
Pie

Answer:

P.E = 3.675  J

Explanation:

Given data:

Height of table = 0.75 m

Mass of book = 0.5 kg

Potential energy = ?

Solution:

Formula:

P.E = mgh

g =acceleration due to gravity =  9.8 m/s²

by putting values,

P.E = 0.5 kg× 9.8 m/s² ×0.75 m

P.E  = 3.675 kgm²/s²

J = kgm²/s²

P.E = 3.675  J

5 0
3 years ago
Read 2 more answers
What is the instantaneous acceleration of the particle at point B?
luda_lava [24]

__0 meters/second^2__

5 0
3 years ago
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