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2 years ago

4. A gas occupies 1.56 L at 2.00 atm. What will be the volume of this gas if the pressure becomes 4.00 atm?

Chemistry

1 answer:

tekilochka [14]2 years ago

5 0

Answer:

Explanation:

From Boyle's Law :

P₁V₁ = P₂V₂

Here :

P₁ = 2.00 atm
V₁ = 1.56 L
P₂ = 4.00 L

Solving :

V₂ = P₁V₁ / P₂
V₂ = 2 x 1.56 / 4
V₂ = 1.56 / 2
V₂ = <u>0.78 L</u>

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The specific heat of aluminum is 0.88 J/g°C. How many joules will it take to make the temperature of a 50. g nugget go up from 2

AlladinOne [14]

Answer:

2200J

Explanation:

Given parameters:

Specific heat of aluminum = 0.88J/g°C

Mass of nugget = 50g

Initial temperature = 20°C

Final temperature = 70°C

Unknown:

Quantity of heat required for the heating = ?

Solution:

To solve this problem, we use the expression below;

H = m c Δt

H is the quantity of heat

m is the mass

c is the specific heat capacity

Δt is the change in temperature

H = 50 x 0.88 x (70 - 20) = 2200J

3 0

3 years ago

Matthias wants to dissolve a solid sample of calcium chloride (cacl2), which is an ionic compound. Which solvent will dissolve t

miv72 [106K]

Answer:

The answer to your question is: water, polar solvent.

Explanation:

Data

sample of CaCl2

Solid copper this option is incorrect because in order to dissolve something the solvent must be liquid and this is a solid solvent.

water, I think this option is right, because CaCl2 is ionic and water is a polar solvent, CaCl2 will dissolve in water.

a polar solvent, CaCl2 will dissolve is a polar solvent like water, this option is correct.

hexane, CaCl2 will not dissolve in hexane because hexane is a non polar solvent and CaCl2 is ionic. This option is wrong

a nonpolar solvent This option is not right, CaCl2 will only dissolve in polar solvents.

liquid mercury, This option is wrong, mercury is not a solvent.

6 0

3 years ago

Correct name for #10 please

ira [324]

Answer:

CH₃CH(CH₃)CH(C₃H₇)CH₂CH(CH₃)₂:

4-isopropyl-2-methylpentane.

Explanation:

Step One: Draw the structure formula of this compound. Parentheses in the formula indicate substitute groups that are connected to the carbon atom to the left.

For example, the first (CH₃) indicates that the second carbon atom from the left is connected to:

the CH₃- on the left-hand side,
the -CH(C₃H₇)CH₂CH(CH₃)₂ on the right-hand side,
a hydrogen atom, and
an additional CH₃- group that replaced one hydrogen atom.

Each carbon atom in this compound is connected to four other atoms. All bonds between carbon atoms are single bonds.

The C₃H₇ in the second pair of parentheses is the condensed form of CH₃CH₂CH₂-. See the first sketch attached. Groups in parentheses are highlighted.

Step Two: Find the carbon backbone. The backbone of a hydrocarbon is the longest chain of carbon atoms that runs through the compound. See the second sketch attached. The backbone of this compound consists of seven carbon atoms and is highlighted in green. The name for this backbone shall be heptane.

Step Three: Identify and name the substitute groups.

The two substitute groups are circled in blue in the second sketch.

The one on the right -CH₃ is a methyl group.
The one on the left is branched. $\begin{aligned}\text{CH}_3-&\text{CH}-\text{CH}_3\\[-0.5em]&\;|\end{aligned}$ This group can be formed by removing one hydrogen from the central carbon atom in propane. The name for this group is isopropyl.

Step Four: Number the atoms.

Isopropyl shall be placed before methyl. Start from the right end to minimize the index number on all substitute groups. The methyl group is on carbon number two and the isopropyl group on carbon number four. Hence the name:

4-isopropyl-2-methylheptane.

5 0

4 years ago

In order to make 0.500 L of a 0.475 M solution, you will need to weigh out how many grams of sucrose (MM = 342 g/mol)?

elixir [45]

The first step to solve this problem is to multiply the volume of solution times its concentration to find the number of moles needed, remember that M=mol/L:

$0.500L\cdot\frac{0.475mol}{L}=0.2375mol$

Now, use the molar mass of sucrose to find the number of grams needed to make the solution. This is, multiply the number of moles needed times the molar mass:

$0.2375mol\cdot\frac{342g}{mol}=81.225g$

It means that to make 0.500L of a 0.475M you will have to weigh 81.225g of sucrose.

4 0

1 year ago

Why reaction between phosphorus and oxygen produces four atoms of phosphorus and five atoms of oxygen

andreev551 [17]

Answer:

Reaction between an oxygen and a phosphorus will produce oxides of phosphorus.

Explanation:

Reaction between oxygen and phosphorus produces four atoms of phosphorus with five atoms of oxygen. Sometimes it produces two atoms of phosphorus and five atoms of oxygen and sometimes four atoms of phosphorus and six atoms of oxygen. It does so depending upon the availability of oxygen. The size of phosphorus atom interferes with the ability to form a double bonds to the other elements, such as nitrogen, oxygen, etc.

4 0

3 years ago