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3 years ago

Classify the following as an element, compound, homogeneous mixture, or heterogeneous

Chemistry

1 answer:

Archy [21]3 years ago

3 0

The answer is D. Heterogeneous mixture

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19)Calculate the number of moles of Al2O3 that are produced when 15 mol of Fe is produced

Margarita [4]

Answer:

Explanation:

Calculate the number of moles of Al2O3 that are produced when 15 mol of Fe is produced

in the following reaction.

C) 45 mol

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2 years ago

How would you abbreviate you as an element?

qaws [65]

Answer:

i am unique and have a specific number in the periodic table

5 0

2 years ago

How many moles of solute are present in 2 L of a 25M potassium nitrate (KNO3) solution?

Maksim231197 [3]

Mole= Molarity. Volume(L) = (25)(2)= 50 moles

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2 years ago

Mature elephants consume an average of 600 pounds of food per day. If an elephant

MAXImum [283]

Answer:

$\large \boxed{\text{4 600 000 kg or 4600 Mg}}$

Explanation:

1. Calculate the adult life

If the elephant is an adult from its 10th birthday until the day before its 56th birthday, its

Adult life = 55 - 10 + 1 = 46 yr

2. Convert years to days

$\text{Adult life} = \text{46 yr} \times \dfrac{\text{365.25 da}}{\text{1 yr}} = \text{16 800 da}$

3. Convert days to pounds of feed

$\text{Feed} = \text{16 800 da} \times \dfrac{\text{600 lb}}{\text{1 da}} = 1.01 \times 10^{7} \text{ lb}$

4. Convert pounds to kilograms and megagrams

$\text{Feed} =1.01 \times 10^{7} \text{ lb} \times \dfrac{\text{1 kg}}{\text{2.20 lb}} =\textbf{4 600 000 kg} = \textbf{4600 Mg}\\\\\text{The elephant will eat $\large \boxed{\textbf{4 600 000 kg or 4600 Mg}}$ of food.}$

Note: The answer can have only two significant figures because that is all you gave for age of the elephant.

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3 years ago

Do oxygen atoms become more stable or less stable when oxygen forms compounds? Explain

4vir4ik [10]

They become more stable because they achieve a full outer shell of valence electrons with the magic number of 8.

5 0

2 years ago

Read 2 more answers