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Afina-wow [57]
3 years ago
5

An object has a mass of 441 g and a volume of 10cm3

Chemistry
1 answer:
expeople1 [14]3 years ago
3 0

Answer:

44.1g/cm3

Explanation:

d=m/v

=441/10

=44.1 g/cm3

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Which substance is the limiting reactant when 2.0 g of sulfur reacts with 3.0 g of oxygen and 4.0 g of sodium hydroxide accordin
Rudik [331]

Answer:

The limiting reactant is NaOH (option B)

Explanation:

2S(s)  +  3O₂(g)  +  4NaOH(aq)   →   2Na₂SO₄(aq)  +  2H₂O(l)

The reaction is ballanced. OK

We need to know how many moles do we have from each compound.

Mass / Molar weight = Mol

Molar weight S = 32 g/m

Molar weight O₂ = 32 g/m

Molar weight NaOH = 40 g/m

Mol S: 2g/ 32g/m = 0.0625 mol

Mol O₂: 3g / 32 g/m = 0.09375 mol

Mol NaOH: 4g/ 40g/m = 0.1 mol

Now, we can play with the reactants. The base is: 2 moles of S, react with 3 mol of O₂ and 4 moles of hydroxide to make 2 moles of sulfate and 2 moles of water. Pay attention to the rules of three.

2 moles of S __ react with __ 3 moles of O₂ __ and __ 4 moles of NaOH

0.0625 moles S __________ 0.09375 moles O₂ ___ 0.125 moles NaOH

The limiting reactant is the NaOH. I need to use 0.125 moles and I only have 0.1 moles.

Let's do the same with O₂

3 moles of O₂ __ react with __ 2 moles of S __ and __ 4 moles of NaOH

0.09375 moles of O₂ _______ 0.0625 mol of S _____ 0.125 moles NaOH

5 0
3 years ago
Please please help !!!
lubasha [3.4K]

Answer:

They don't go below 60

Explanation:

7 0
3 years ago
In the following combustion reaction, what is the mole ratio of diatomic oxygen to water?2 c2h6 7 o2(
polet [3.4K]
The right answer is 7/6
8 0
3 years ago
Water’s heat of vaporization is 2,257 joules/gram. How much energy is released when 11.2 grams of water vapor condenses into liq
atroni [7]

Heat of vaporization is the heat required to vaporize unit mass of a substance at it's boiling point. The heat of vaporization or condensation of water is 2257 J/g.

It means that 1 g of water involves 2257 J energy during condensation or vaporization at its boiling point (100 C)

Given mass of water vapor that is condensing = 11.2 g

Calculating the heat released when 11.2 g of water vapor condenses in to liquid water at 100^{0}C:

11.2 g *2257\frac{J}{g} = 25,278 J

Rounding the final answer 25,278 J to three significant figures we get, 25,300 J

Therefore the correct answer is E.  25,300 J


6 0
4 years ago
Which statements correctly describe the effect of distance in determining the gravitational force and the electrical force? Chec
Luda [366]

Answer:

The gravitational force is inversely proportional to the square of the distance..

The electrical force is inversely proportional to the square of the distance..

Explanation:

From the Newton's law of universal gravity, we understood that the force of attraction between the masses two objects is inversely proportional to the square of the distance apart. Mathematically, it is expressed as:

F = GM1M2/r²

Where:

M1 and M2 are the masses of two objects measured in kilograms (Kg).

G is the gravitational constant with a value of 6.67×10¯¹¹ Nm²/Kg²

r is the distance apart measured in metre (m).

F is the force of attraction measured in Newton (N).

From the equation:

F = GM1M2/r²

The force (F) is inversely proportional to the square of the distance (r) apart. This means that the greater the distance apart, the smaller the force of attraction and the smaller the distance apart, the greater the force of attraction between the masses of the object.

From Coulomb's Law, we understood that the force of attraction between two charged particles is inversely proportional to square of the distance. Mathematically, it expreessed as

F = Kq1q2/ r²

Where:

q1 and q2 are charges of two objects measured in coulomb (C) .

r is the distance apart measured in metre (m)

K is the electrostatic constant with a value of 9×10^9 Nm²/C²

F is the force measured in Newton (N).

From the equation:

F = Kq1q2/ r²

The force (F) is inversely proportional to the square of the distance (r) apart.. This implies that as the distance between the charged particles increase, the smaller the force of attraction between them and as the distance between the charged particles decrease, the greater the force of attraction between the two charged particles.

6 0
3 years ago
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