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4 years ago

Which step of scientific inquiry involves organizing and interpreting the data a.experimentation

Chemistry

2 answers:

GaryK [48]4 years ago

8 0

Answer: B. analysis

Explanation:

A scientific inquiry is the fact finding inquiry which determines the cause of a natural process on the basis of experimental processes. The analysis process involves the comparison of the observations or data obtain after the experimental trials with the theoretical knowledge of the topic of research or question. This helps in rectifying the fact that the data fulfill the requirement and answer to the question which is being asked.

Afina-wow [57]4 years ago

7 0

B because A is the experiment so you won't have the data until after, not C because that's when you have your final verdict on the experiment not just looking at results, and not D because a hypothesis is something you form before an experiment. Hope this helped!

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Consider the following reactions: 1. 2 SO3(g) ⇄ 2 SO2(g) + O2(g) K 1 = 2.3 × 10-7 2. 2 NO3(g) ⇄ 2 NO2(g) + O2 (g) K 2 = 1.4× 10-

juin [17]

Answer:

K =78

Explanation:

Step 1: Data given

2SO3(g) <--> 2SO2(g) + O2(g) kc = 2.3 x 10^-7

2NO3(g) <--> 2NO2(g) + )2(g) kc = 1.4 x 10^-3

Step 2: Calculate K

Lets write out the two reactions in the proper order and look at how they sum together:

2 SO2(g) + O2(g) <---> 2 SO3(g) (1)

2NO3(g) <---> 2 NO2(g) + O2(g) (2)

The two reactions as now written give us the correct reactants and products on the correct sides of the reaction arrow.

Since we have O2 as both a reactant and a product, we can cancel O2 and are not part of the final overall reaction equation.

Koverall = Kc1 * Kc2

Because we reversed reaction number 1 this affects its Kc via the following:

Krev = 1/Kfwd.

We then replace Kc1 with its value for the reverse direction.

So Koverall now = (1/Kfwd) * Kc2

The sum of the two reactions above gives us:

2 SO2(g) + 2 NO3(g) <---> 2 SO3(g) + 2 NO(g)

The problem states to give the K value for the reaction where all the numbers in front of the molecules are (1), and we have (2)'s. So basically if we multiply the whole reaction by 1/2 we'll get the final overall equation we want.

1/2 ( 2 SO2(g) + 2 NO3(g) <----> 2 SO3(g) + 2 NO(g) )

So Kfinal = (Koverall)^1/2

K = ( 1/Kfwd * Kc2)^1/2

K = ( [1 / 2.3 * 10^-7] * 1.4 * 10^-3)^1/2

K =78

3 0

3 years ago

Problem 3.100 a chemical plant uses electrical energy to decompose aqueous solutions of nacl to give cl2,h2, and naoh: 2nacl(aq)

chubhunter [2.5K]

First we calculate the number of moles of Cl2, that is:

moles Cl2 = 1.5*10^10 grams/71 grams/mol = 211267605.633802817 mol = 2.1 * 10 ^ 8 mole = x 

So that based on stoichiometry, the number of moles of NaOH = 2x and that of H2 = x mol

mass of NaOH = 4.2*10^8 * 40 =168*10^8 grams = 1.68 * 10^6 kg = 1.68 metric tons

mass of H2 = 2.1*10^8 * 2 = 4.2*10^8 grams = 0.042 * 10^6 kg = 0.042 metric tons.

4 0

3 years ago

Explain how scientist learned about the magnetic poles of the Earth.

MatroZZZ [7]

Answer:

They learned because they keeped studying they would never give up and if they found something new or interesting they may have just studied it more.

Explanation:

3 0

3 years ago

Read 2 more answers

Draw an example each of a hydrogen atom that can and can’t participate in hydrogen bonding.

frutty [35]

Answer:

A hydrogen bonding is a bond class that is produced from the attraction existing in a hydrogen atom and an oxygen, fluorine or nitrogen atom with a negative charge. This attraction, meanwhile, is known as dipole-dipole interaction and links the positive pole of one molecule with the negative pole of another.

Explanation:

The hydrogen atom, which has a positive charge, is known as the donor atom, while the oxygen, fluorine, chlorine or nitrogen atom is the bond acceptor atom. In the substance in which they are most effective is in the water.

Hydrogen bonds have only one third of the strength of covalent bonds, but they have important effects on the properties of the substances in which they occur, especially in terms of melting and boiling points in crystal structures.

8 0

3 years ago

The outer skin makes the surfboard more expensive. Suggest two reasons why an outer skin is added to the polystyerene core.

Vlada [557]

Answer:

It helps it not to break or crack. It is like an outer shell to protect it.

Explanation:

5 0

3 years ago