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4 years ago

Which sentence best describes the relationship between the mole and Avogadro’s number?

1 answer:

8 0

Avogadro's number represents the number of individual molecules that are present in a mole of material. This number is 6.02*10^23 regardless of the element or substance you are dealing with.

A good sentence would be something like, "A mole of a certain material will contain 6.02*10^23 molecules, which is known as Avogadro's number."

Hope this helps

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Ants live on acacia trees in South America. The ants feed on sugars secreted by the trees. The trees provide room for the ants t

Stolb23 [73]

Mutualism! The tree provides a home and food for the ants, while the ants protect the tree :)

8 0

3 years ago

HELP ASAP !!!!!

Anna35 [415]

Answer:

Explanation:

Take a random sample of nuts from the jar. Let's take two handfuls, after shaking the jar and mixing the nuts thoroughly. Separate the nuts into almonds and cashews. Count each pile, then do the following calculation (these numbers are random, for example only).

<u> Count</u> <u>Percentage %</u>

Almonds 38 (38)/(87)x100

Cashews <u> 49</u> 49/87x100

87 87/87 = 100%

Ratio of Almonds to Cashews: <u>38/49</u>

3 0

3 years ago

What solid element is black, is an electrical conductor, is brittle and is found in group 4 of the periodic table?

elixir [45]

Answer: silicon Si, Germanium GE

Explanation:

4 0

3 years ago

Assuming that both cases describe hydrogen‑like atoms with one electron, for which case is more energy emitted or absorbed?

Nana76 [90]

Assuming that both cases describe hydrogen‑like atoms with one electron, More energy is emitted or absorbed for case 2. The correct option is D.

<h3>What is emitting of energy, by electron?</h3>

The energy of the electron decreases as it changes levels, and emission of photons happens in the atom.

With the electron moving from a higher to a lower energy level, the photon is emitted. The photon's energy is the same as the energy lost by an electron moving to a lower energy level.

Thus, the correct option is D, More energy is emitted or absorbed for case 2.

Learn more about emitting of energy

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5 0

2 years ago

Calculate how much heat is absorbed by a sample that weighs 12 kilograms, has a specific heat of 0.231 kg/CJ, and is heated from

Andrei [34K]

Answer:

97 J

Explanation:

Step 1: Given data

Mass of the sample (m): 12 kg

Specific heat capacity (c): 0.231 J/kg.°C (this can also be expressed as 0.231 J/kg.K)

Initial temperature: 45 K

Final temperature: 80 K

Step 2: Calculate the temperature change

ΔT = 80 K - 45 K = 35 K

Step 3: Calculate the heat required (Q)

We will use the following expression.

Q = c × m × ΔT

Q = 0.231 J/kg.K × 12 kg × 35 K = 97 J

4 0

3 years ago