Calculate the temperature of 2.0 moles of a gas occupying a volume of 5.0 L at 2.46 atm. (R = 0.08125 L atm/mol L)
a. 75 K
b. 348 K
c. 198 K
d. 0.013 K

Answer:

(2) 50 kg

(3) 73.75 J/kg.K

Explanation:

(2) From the question,

Using,

q = mcΔt........................ Equation 1

Where q = amount of heat, m = mass. c = specific heat capacity, Δt = change in temperature

make m the subject of the equation

m = q/(cΔt)..................... Equation 2

Given: q = 1.500 J, c = 1.0 J/kg.K, Δt = 30°C

substitute these values into equation 2

m = 1500/(1×30)

m = 50 kg

(3) using

q = cm(t₂-t₁).

Where t₁ and t₂ = initial and final temperature respectively

making c the subject

c = q/m(t₂-t₁)................ Equation 3

Given: q = 41.3 J, m = 16 g = 0.016 kg, t₂ = 80°C, t₁ = 45°C

Substitute these values into equation 3

c = 41.3/0.016(80-45)

c = 41.3/0.56

c = 73.75 J/kg.K

Answer:

0.131mol

Explanation:

Firstly, we need to find the number of moles of chlorine gas (Cl2) by using the formula:

PV = nRT

Where;

P = pressure (atm)

V = volume (L)

n = number of moles (mol)

R = gas constant (0.0821 Latm/molK)

T = temperature (K)

Using PV = nRT

n of Chlorine = PV/RT

Based on the information provided in this question, V = 2.12 L, P = 2.27atm, T = 24°C = 24 + 273 = 297K

n = 2.27 × 2.12/ 0.0821 × 297

n = 4.8124/24.3837

n = 0.197

number of moles of Chlorine gas = 0.197mol

The balanced chemical equation provided in this question is as follows;

2 Al(s) + 3Cl2 (g) → 2AlCl3 (s)

3 moles of Cl2 produce 2 moles of AlCl3

0.197moles of Cl2 will produce;

0.197 × 2/3

= 0.394/3

= 0.131mol of AlCl3.

Answer:

water

Explanation:

H2O

Answer:The answer is water

Explanation: Hydrogen is an element made of an aggregate of hydrogen atoms while oxygen is an element made of oxygen atoms. However, water is a compound made of water molecules.

Answer:

nacl cacl kcl mgcl k2so4 na2co3 na2so4 kno3 nahco3 naco3

Explanation:

Answer:

infrared energy

Explanation:

Answer:

[tex]50\; \rm mL[/tex] of the stock solution would be required.

Explanation:

Assume that a solution of volume [tex]V[/tex] contains a solute with a concentration of [tex]c[/tex]. The quantity [tex]n[/tex] of that solute in this solution would be:

[tex]n = c \cdot V[/tex].

For the solution that needs to be prepared, [tex]c = 0.20\; \rm M = 0.20\; \rm mol \cdot L^{-1}[/tex]. The volume of this solution is [tex]V = 250.0\; \rm mL[/tex]. Calculate the quantity of the solute (magnesium chloride) in the required solution:

[tex]\begin{aligned}n &= c \cdot V \\ &= 0.20\; \rm mol \cdot L^{-1} \times 250.0\; \rm mL \\ &= 0.20\; \rm mol \cdot L^{-1} \times 0.2500\; \rm L \\ &= 0.050\; \rm mol\end{aligned}[/tex].

Rearrange the equation [tex]n = c \cdot V[/tex] to find an expression of volume [tex]V[/tex], given the concentration [tex]c[/tex] and quantity [tex]n[/tex] of the solute:

[tex]\displaystyle V= \frac{n}{c}[/tex].

Concentration of the solute in the stock solution: [tex]c(\text{stock}) = 1.00\; \rm M = 1.00\; \rm mol \cdot L^{-1}[/tex].

Quantity of the solute required: [tex]n = 0.050\; \rm mol[/tex].

Calculate the volume of the stock solution that would contain the required [tex]n = 0.050\; \rm mol[/tex] of the magnesium chloride solute:

[tex]\begin{aligned}& V(\text{stock}) \\ &= \frac{n}{c(\text{stock})} \\ &= \frac{0.050\; \rm mol}{1.00\; \rm mol \cdot L^{-1}} \\ &= 0.050\; \rm L \\ &= 50\; \rm mL\end{aligned}[/tex].

Explanation:

Each element has its own unique properties. Each contains a different number of protons and neutrons, giving it its own atomic number and mass number. The atomic number of an element is equal to the number of protons that element contains.

Answer:

The pressure of the gas is 30.3072 atm.

Explanation:

An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law, an equation that relates the three variables if the amount of substance, number of moles n, remains constant and where R is the molar constant of the gases:

P * V = n * R * T

In this case:

Replacing:

P* 2.5 L= 3 moles* 0.082 [tex]\frac{atm*L}{mol*K}[/tex] *308 K

Solving:

[tex]P=\frac{ 3 moles* 0.082 \frac{atm*L}{mol*K} *308 K}{2.5 L}[/tex]

P= 30.3072 atm

The pressure of the gas is 30.3072 atm.

Answer:

My guess is A.

Explanation:

Answer:

d. 200.

Explanation:

The reaction is:

2KMnO4 + 16HCl ----> 2KCl + 2MnCl2 + 8H2O + 5Cl2

So 2 moles of KCL are produced form  16 moles of HCL

So 25 moles KCL are made from   25 * (16/2) HCl.

= 25 * 8

= 200 moles. HCl.

Answer:

Option A

Explanation:

In Dipole -induced dipole forces/interactions a polar and a non polar molecule group together to form a bond.  

The higher is the electronegativity, the higher is the Dipole-Induce dipole.

As electronegativity defines the ability of an atom to attract a pair of electron in any chemical bond.  

The smaller the atom, the higher is the electronegativity and hence the higher is the Dipole -induced dipole forces/interactions

Option A

Answer:

Atom Labeling

Explanation:

Y- neutron

Z-protron

X - electron

W- nucleus

Answer:

Cold

Explanation:

Because 0°C And below or 32°F Refers To Cold Weather

Answer: the amount of force on the spring scale

Explanation:

Answer:

Usually, you should lay down your educational background by listing the most recent or advanced degree first, working in reverse chronological order. But there are exceptions. Say you earned a degree in geography, but are now working in the field of online marketing. If you more recently completed coursework specific to social media or digital marketing, list that first to grab the reviewer’s attention.

Explanation:

Answer:

Start with the most recent  or advanced degree first, working in reverse chronological order.

Explanation:

A neutral solution is one that is neither acidic nor basic. The hydrogen ion concentration equals the hydroxide ion concentration, and both equal 1 X 10-7 M. In a neutral solution, then, pH = pOH = 7.

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\[/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

We have

[tex]n = \frac{1.00 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{1}{6.02} \\ = 0.166112[/tex]

We have the final answer as

Hope this helps you

Explanation:

Explanation:

The substance(s) to the left of the arrow in a chemical equation are called reactants. A reactant is a substance that is present at the start of a chemical reaction. The substance(s) to the right of the arrow are called products . A product is a substance that is present at the end of a chemical reaction

Answer:

Amount of Alcohol volume present in solution = 44.99 ml

Explanation:

Given:

Total volume of solution = 409 ml

Amount of Alcohol percentage present in solution = 11%  

Find:

Amount of Alcohol volume present in solution

Computation:

Amount of Alcohol volume present in solution = Total volume of solution x Amount of Alcohol percentage present in solution

Amount of Alcohol volume present in solution = 409 x 11%

Amount of Alcohol volume present in solution = 409 x 0.11

Amount of Alcohol volume present in solution = 44.99 ml

Explanation:

a. pressure always favors the side with fewer molecules. in this reaction as both the sides have equal number of molecules, there won't be any change in the position of the equilibrium.

b. when the concentration of the hydrogen gas is increased. more particles would take place in the reaction and so, the rate of reaction would increase favoring the reaction concerning hydrogen gas molecules (backward reaction in this case) therefore, equilibrium would shift to the backward reaction (left).

c. as forward reaction is endothermic, when temperature is increased the equilibrium will shift to the forward reaction (right).

d. catalyst would not have any effect on the position of the equilibrium. it will only increase the rate of reaction.

hope it helps. :)

Answer:first one is carbon

Explanation:

Other than that I don’t know

Answer:

Cs, Os, Sn, Br

Explanation:

Metallic character increases to the left and down the periodic table.

Answer:

a

Explanation:

The solution that has the highest concentration given the data is solution A ( Option D)

This is defined as the mole of solute per unit litre of solution. Mathematically, it can be expressed as:

Molarity = mole / Volume

Mole = mass / molar mass

Mole of NaCl = 5 / 58.5

Mole of NaCl = 0.085 mole

Molarity = mole / Volume

Molarity of solution A = 0.085 / 0.05

Molarity of solution A = 1.7 M

Molarity = mole / Volume

Molarity of solution B = 0.085 / 0.075

Molarity of solution B = 1.13 M

Molarity = mole / Volume

Molarity of solution C = 0.085 / 0.1

Molarity of solution C = 0.85 M

Molarity = mole / Volume

Molarity of solution D = 0.085 / 0.125

Molarity of solution D = 0.68 M

SUMMARY

Thus, solution A has the highest concentration of the salt.

Learn more about molarity:

https://brainly.com/question/15370276

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Answer:

This molecule is made up of 3 equally spaced sp2 hybrid orbitals arranged at approximately 120o angles. The shape of the orbitals is planar triangular. One orbital contains a lone pair of electrons.

Answer:

 They both are made up of atoms and having bonds linking their atoms together.molecules and compounds also share the qualities of being both pure and homogeneous substances.

Explanation:

Hope this helped!!!