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Damm [24]
3 years ago
14

A lead ball has a mass of 5.910 g and a diameter of 10.0 mm. What is the density of lead in grams per cubic centimeter? the volu

me of a sphere equals 4pr^3/3, where p is 3.14, and r is the radius
Chemistry
1 answer:
Over [174]3 years ago
3 0

Answer:

Density = 11.294g/cm³

Explanation:

Mass of the ball (m) = 5.910g

Diameter of the ball = 10.0mm

Radius r = 10.0/2 =5.0mm = 0.5cm

Volume of a sphere V = (4pr3)/3

V = 4*3.14*(0.5*0.5*0.5)/3 = V =1.570/3

V = 0.5233cm³

V = 0.5233cm³

Density = mass/volume

Density = 5.910/0.5233

Density = 11.2937g/cm³

Density = 11.294g/cm³

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you are given an unknown gaseous binary compound. when 10.0g of the compound isburned in excess oxygen, 16.3g of water is produc
Flauer [41]
Since the compound has 1.38 time that of oxygen gas at the same conditions of temperature and pressure, we have the relationship:
MW/MWoxygen = 1.38
MW = 44.16

Since there is water formed during the reaction, the formula of the compound must be:
XaHb
where a and b are the coefficients of each element.

If the compound reactions with oxygen forming water and an oxide of the element X, the combustion reaction must be:
XaHb + ((2a + (b/2))/2) O2 = a (XO2) + (b/2)(H2O)
Using dimensional analysis:
10 (1/44.16) (b/2 / 1) (18) = 16.3
Solving for b:
b = 8

The compound now is XaH8. Most probably, the compound is C3H8 since it has a molecular formula of 44 and it reacts with O2 to form water and CO2.
5 0
4 years ago
A particular 3.0 L solution contains 2.5 mmol (millimoles) of a substance. What is the concentration of this solution in number
bearhunter [10]

Answer: 0.83mol/m3

Explanation:

Number of mole = 2.5 mmol = 0.0025mol

Recall

1L = 0.001m3

Therefore 3L = 3x0.001 = 0.003m3

0.003m3 contains 0.0025mol

Therefore, 1m3 will contain = 0.0025/0.003 = 0.83mol

The concentration in mol/m3 is 0.83mol/m3

8 0
4 years ago
The International Union of Chemistry (IUC) developed a specific set of rules for chemists to follow. What were these rules calle
vampirchik [111]

im just seeing something

sorry egnor me ok?

8 0
3 years ago
Read 2 more answers
Does volume alone determine whether an object will float or sink?
Reil [10]

Answer:

no volume does not

Explanation:

6 0
3 years ago
What is the name of this hydrocarbon?
jenyasd209 [6]

Answer:

2-methylebutane

Explanation:

it is a hydrocarbon and there is a specific Rule for its nomenclature.

that is known as IUPAC naming system. According to it

  • The compound that has all single bonds name ends on ane.
  • Names according to the number of Carbons,

                * For one carbon compound it is known as methane,

                * For 2 ethane,

                * For 3 propane

                * For 4 Butane and so on.

  • select the longest chain of compound
  • Start numbering with lowest substituted position at carbon
  • branch compound name as Iso and neo as whole

So keeping in mind the compound can be named as

2-methylebutane

  • As the longest chain contain four carbon atoms so it will name as butane
  • The substitution of methyl group is on C-2

*Note: it can also named as isopantane as it is branched and have five carbons but it could not be 3-isopentane.

5 0
3 years ago
Read 2 more answers
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