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3 years ago

PLEASE HELP WILL MARK BRAINLIEST

Chemistry

2 answers:

Lelechka [254]3 years ago

7 0

Answer:

The answer is

Explanation:

Definitions

Observation: is when something catches our attention

Prediction: is a statement about a future event, based upon experience and knowledge

Inference: is a conclusion based on evidence and reasoning.

Hypothesis: is a proposed explanation for a fenomenon

Case I:

It isn't an observation

It isn't a prediction because it happened not will happen

I think is an inference

It isn't a hypothesis, a hypothesis has an specific structure If ... then ...

Case II

I think is a prediction, something that will happen

It isn't an observation he did more than that

It isn't an inference

Hypothesis has an structure.

MAXImum [283]3 years ago

4 0

Answer:

1 is b and 2 is d

Explanation:

because you do not know that the cat had done that you was just thinking it was the cat

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Jen makes a Venn diagram to compare active transport and passive transport.

Oksanka [162]

Answer:

moves molecules

Explanation:

I did this one yesterday! Active transport moves low to high concentration and passive does the opposite so C and D are not an option. Active transport requires energy and Passive Transport does not so it has to be A.!

6 0

3 years ago

Read 2 more answers

The reactant atoms are copper, hydrogen, nitrogen, and oxygen. Which reactant atom was oxidized in the reaction?

SCORPION-xisa [38]

Answer:

C. copper.

Explanation:

The atom which loses electrons (its oxidation sate be more positive) is the atom that is oxidized.

While, the atom which gains electrons (its oxidation sate be more negative) is the atom that is reduced.

Nitrogen:

It is oxidation sate is changed from (+5) in the reactants (NO₃⁻) to (+4) in the products (NO₂). N gains 1 electron

So, it is reduced.

Oxygen:

It is oxidation sate is the same (-2) in the reactants (NO₃⁻) and (-2) in the products (NO₂).

So, it is neither be oxidized nor reduced.

Copper:

It is oxidation sate is changed (0) in the reactants (Cu) to (+2) in the products (Cu²⁺). Cu loses 2 electrons.

So, it is oxidized.

Hydrogen:

It is oxidation sate is the same (+1) in the reactants (H⁺) and (+1) in the products (H₂O).

So, it is neither be oxidized nor reduced.

5 0

4 years ago

If you heat a liquid and measure the temperature at which it vaporizes (or boils) you are measuring...

Svetllana [295]

Answer:

I believe that it is B

Explanation:

3 0

3 years ago

PLEASE HELP, I REALLY NEED HELP WITH THIS!!!

Mkey [24]

Answer:

Explanation:

There are 6 32S atoms and 2 36S atoms

Their respective contributions to the average aomic mass is (6*32)=192, and (2*36)=72. Added together, this makes 264 total. Divide by the total number of atoms, 8. (264/8) = 33.00

The weighted atomic mass of these S atoms is 33.00 amu (atomic mass units)

3 0

3 years ago

Narceine is a narcotic in opium that crystallizes from solution as a hydrate that contains 10.8 mass % water and has a molar mas

Leto [7]

Thewater of hydration x in narceine. xH₂O is 3

<h3>What is Water of Hydration?</h3>

In chemistry, water molecules found inside crystals are referred to as "water of crystallization" or "water of hydration." When crystals are formed from aqueous solutions, water is frequently included.
The entire mass of water in a substance at a specific temperature is sometimes referred to as water of hydration, and it is typically present in a stoichiometric ratio.
The term "water of crystallization" has historically been used to describe water that is not physically linked to the metal cation but is present in the crystalline structure of a metal complex or salt.
Many chemicals include water molecules in their crystalline structures when they crystallize from water or solvents that contain water. Heating a sample usually removes the water of crystallization, but the crystalline qualities are frequently lost.

Given that hydrate is 10.8% by mass

molar mass = 499.52 g/mol

calculating the amount of water

mass of water = $\dfrac{10.8 \times 499.5}{100}$