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3 years ago

Life vest floats in the water therefore what do you know about the life vests density?

Chemistry

1 answer:

Ymorist [56]3 years ago

8 0

Answer:

their density is only lighter than water because of the air inside. without the air you would sink even if you were holding it firmly.

Explanation:

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Which of the following chemical reactions will produce a precipitate? *

Zolol [24]

Answer:

Explanation:

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3 years ago

Which relationship or statement best describes delta s for the following reaction:

zalisa [80]

Answer:

b) Delta S < 0

Explanation:

The change in the entropy (ΔS) is related to the change in the number of gaseous moles of the reaction: Δn(g) = n(g, products) - n(g, reactants).

If Δn(g) > 0, the entropy increases (ΔS > 0).

If Δn(g) < 0, the entropy decreases (ΔS < 0).

If Δn(g) = 0, there is little or no change in the entropy

Let's consider the following equation.

2 H₂S(g) + 3 O₂(g) → 2 H₂O(g)

Δn(g) = 2 - 5 = - 3. Since Δn(g) < 0, the entropy decreases and ΔS < 0.

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3 years ago

Name any two polymers which are formed by the process of condensation polymerization.

ehidna [41]

Polyester and polyamide would be two synthetic polymers, created by condensation reaction.

5 0

3 years ago

Which of the following liquids or solutions, at the same concentration, will have the lowest freezing point and why?

jok3333 [9.3K]

Answer:idk

Explanation:Idk

6 0

3 years ago

5. 16.3 g of NaCl is dissolved in water to make 1.75 L of solution. What is the molarity of this solution? A 0.159 M B 0.278 M C

ira [324]

Answer: The molarity of this solution is 0.159 M.

Explanation:

Given: Mass of solute = 16.3 g

Volume = 1.75 L

Number of moles is defined as the mass of substance divided by its molar mass.

Hence, moles of NaCl (molar mass = 58.44 g/mol) ar calculated as follows.

$Moles = \frac{mass}{molar mass}\\= \frac{16.3 g}{58.44 g/mol}\\= 0.278 mol$

Molarity is the number of moles of a substance present in a liter of solution.

So, molarity of the given solution is calculated as follows.

$Molarity = \frac{no. of moles}{Volume (in L)}\\= \frac{0.278 mol}{1.75}\\= 0.159 M$

Thus, we can conclude that the molarity of this solution is 0.159 M.

5 0

3 years ago