Show a numerical setup for calculating the percent by mass of NaCl in the solution inbeaker 4.

Answers

Answer 1

Answer: Let's think about the solution first: it's composed of water (100 g) and 35.04 grams of NaCl (in beaker for)

together it's 100+35.04=135.04

and NaCl in this solution is 35.04/135.04=25.95.

So the answer is 25.95

Answer 2

Answer: Mass Percentage Definition. Mass percentage is one way of representing the concentration of an element in a compound or a component in a mixture. Mass percentage is calculated as the mass of a component divided by the total mass of the mixture, multiplied by 100%.
% mass = [( 35.04) / ( 100 + 35.04)] * 100
% mass = 25.95 %

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In a redox reaction, which particles are lost and gained in equal numbers

Answers

In a redox reaction electrons are lost and gained in equal numbers. The species that is oxidized gives electrons to the species that is reduced. I hope this helps. Let me know if anything is unclear.

Which group tends to have the highest ionization energy? The lowest?a) Halogens; Alkaline earth metals
b) Alkali metals; Noble gases
c) Noble gases; Alkali metals

Answers

Final answer:

The group with the highest ionization energy is(option c) noble gases due to their full electron shell, making it difficult to remove an electron. The group with the lowest ionization energy is(option c) alkali metals because they have only one electron in their outermost shell, which can be easily removed.

Explanation:

The answer to the question is (c) Noble gases; Alkali metals. Ionization energy is the energy required to remove an electron from an atom or ion. A higher ionization energy means it is harder to remove an electron.

Noble gases have the highest ionization energies because they have a full electron shell, so they do not readily give up an electron. On the other hand, alkali metals have the lowest ionization energy, because they have only one electron in their outer shell, which is relatively easy to remove.

Learn more about Ionization Energy here:

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How does the speckled coat of a young deer help it to survive?A) The speckled coat is a form of mimicry.
B) This is a physical adaptation that helps a doe recognize her fawn.
C) The pattern of the speckled coat is used as a form of warning coloration.
D) The speckled coat blends with the light that filters through the forest leaves.

Answers

the answer is D, The speckled coat helps them camouflage into the environment

Answer:

The answer is D

Explanation:

A container is filled with 4.0 g H2 and 5.0 02. How much water is produced

Answers

4.0 g water. Water is the limiting reactant. Therefore there will be excess oxygen.

Which scientist was a great influence to others when he developed the heliocentric model about how the planets orbited the Sun?

Answers

It was'nt until the 16th century that a geometric mathematical model of heliocentric system was presented by a Renaissance mathematician, astronomer, Nicolaus Copernicus

Nicolaus Copernicus leading to the Copernican Revolution

A farmer had an accident and spilled a chemical into his pond. Several days later, he notices many dead frogs around the pond. That summer, the number of gnats around the pond was higher than ever. This is becausea. the chemical is good for the gnats.
b. the frogs are a limiting factor for the gnats.
c. the gnats are a limiting factor for the frogs.
d. the chemical is a limiting factor for the gnats.

Answers

Answer:

The correct answer is option b.

Explanation:

A limiting factor or limiting reagent is a compound of reactant which gets used up first and effects the formation of product in a chemical reaction.

Around the pond frog would be feeding on gnat, and due to their presence population of gnats were in control .But due to accidental spilling of chemical in pond resulted in death of frogs. Which were actually responsible for less population of gnats around the pond but due to dead action of chemical on them (frogs) their population in pond declined due to which increase in population of gnats was observed.

On generalizing this fact:

Higher the population of frogs lower will be the population of gnats.
lower the population of frogs higher will be the population of gnats.

So, from this we can conclude that frogs are the limiting factors for the gnats as more the number of frogs lessor will be number of gnats.

b. the frogs are a limiting factor for the gnats
the frogs limit the reproduction of the gnats, and therefore with less frogs the gnat population can increase

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