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Vladimir79 [104]
2 years ago
15

The temperature of a 268 mL sample of gas increases from 151. K to 353. K. What is the final volume of the sample of gas, if the

pressure in the container is kept constant?
Chemistry
1 answer:
svet-max [94.6K]2 years ago
7 0

Answer:

V₂  = 626.52 mL

Explanation:

Given data:

Initial volume = 268 mL

Initial temperature = 151 K

Final temperature = 353 K

Final volume = ?

Solution:

V₁ / T₁ = V₂ / T₂

V₂  = V₁  T₂/ T₁

V₂  = 268 mL× 353 K /  151 K

V₂  = 94604 mL.K / 151 K

V₂  = 626.52 mL

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Write a balanced equation for the single-replacement oxidation-reduction reaction described, using the smallest possible integer
jeyben [28]

Answer:

\rm Cl_2 + 2\; KBr \to Br_2 + 2\; KCl.

One chlorine molecule reacts with two formula units of (aqueous) potassium bromide to produce one bromine molecule and two formula units of (aqueous) potassium chloride.

Explanation:

<h3>Formula for each of the species</h3>

Start by finding the formula for each of the compound.

  • Both chlorine \rm Cl and bromine \rm Br are group 17 elements (halogens.) Each
  • On the other hand, potassium \rm K is a group 1 element (alkaline metal.) Each

Therefore, the ratio between \rm K atoms and \rm Br atoms in potassium bromide is supposed to be one-to-one. That corresponds to the empirical formula \rm KBr. Similarly, the ratio between

The formula for chlorine gas is \rm Cl_2, while the formula for bromine gas is \rm Br_2.

<h3>Balanced equation for the reaction</h3>

Write down the equation using these chemical formulas.

\rm ?\; Cl_2 + ?\; KBr \to ?\;Br_2 + ?\; KCl.

Start by assuming that the coefficient of compound with the largest number of elements is one. In this particular equation, both \rm KBr and \rm KCl features two elements each.

Assume that the coefficient of \rm KCl is one. Hence:

\rm ?\; Cl_2 + 1 \; KBr \to ?\;Br_2 + ?\; KCl.

Note that \rm KBr is the only source of \rm K and \rm Br atoms among the reactants of this reaction.

There would thus be one \rm K atom and one \rm Br atom on the reactant side of the equation.

Because atoms are conserved in a chemical equation, there should be the same number of \rm K and \rm Br atoms on the product side of the equation.

In this reaction, \rm Br_2 is the only product with \rm Br atoms.

One \rm Br atom would correspond to 0.5 units of \rm Br_2.

Similarly, in this reaction, \rm KCl is the only product with \rm K atoms.

One \rm K atom would correspond to one formula unit of \rm KCl.

Hence:

\displaystyle \rm ?\; Cl_2 + 1 \; KBr \to \frac{1}{2}\;Br_2 + 1\; KCl.

Similarly, there should be exactly one \rm Cl atom on either side of this equation. The coefficient of \rm Cl_2 should thus be 0.5. Hence:

\displaystyle \rm \frac{1}{2}\; Cl_2 + 1 \; KBr \to \frac{1}{2}\;Br_2 + 1\; KCl.

That does not meet the requirements, because two of these coefficients are not integers. Multiply all these coefficients by two (the least common multiple- LCM- of these two denominators) to obtain:

\displaystyle \rm 1\; Cl_2 + 2 \; KBr \to 1\;Br_2 + 2\; KCl.

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Answer:

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lukranit [14]

The three chemical properties of a penny

Penny ( Pennies: plural; refer to a number of individual coins)

  • A chemical property of a substance is a characteristic of a particular substance that can be observed in a chemical reaction. Some major chemical properties include flammability, toxicity, heat of combustion, pH value, rate of radioactive decay, and chemical stability.

<h3>What is chemical property?</h3>

The chemical properties of a substance can be determined by performing experiments that use specific materials or processes with known characteristics.

The following are three chemical properties to consider when choosing an element to make coins:

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It should malleable, ductile, and an extremely good conductor of both heat and electricity.

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Answer:

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Hope this helped.

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If two nonmetals are bonded together. So look at your periodic table of elements and decide if the two elements that are being bonded are nonmetals or not.
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