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3 years ago

Multiple Choice Atoms of isotopes can be distinguished from atoms of different

Chemistry

2 answers:

Pani-rosa [81]3 years ago

8 0

The correct answer is option A.

Atoms of isotopes can be distinguished from atoms of different elements because isotopes always have the same number of protons as all other atoms of that same element.

Isotopes of different atoms of the same element have the same number of protons and electrons, but different numbers of neutrons.

Different isotopes of the same element have the same atomic number (as the number of protons are same) but different atomic masses (as the number of neutrons are different and atomic mass is the summation of the number of protons and the number of neutrons).

irinina [24]3 years ago

7 0

Protons as all other atoms of the same element

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A 300-gallon anaerobic digester will be loaded daily with a feedstock that contains two parts dairy manure and one-part water by

Mars2501 [29]

Answer:

The volume of feedstock needed to mantain an organic load rate of 2 kgVS/day is 0.055 m3/day of feedstock.

The HRT is 20.6 days.

Explanation:

First, we calculate how many kg is 1 m3 of feedstock. We know the density, so we can calculate the mass:

$M=\rho*V=37.5\frac{lb}{ft^3}*1m^3*(\frac{3.281ft}{1m}) ^3=1324.5lb=600.7 kg$

If the VS are 6% in weight,

$M_{vs}=0.06*M=0.06*600.7\,kg/m^3=36,0kgVS/m3$

The volume per day needed to feed 2 kg of VS/day is:

$V=\frac{2kg}{36kg/m^3}= 0.055m3/day=5.5litres/day$

The HRT depends on the volume of the tank and the flow. Its equation is

$HRT=\frac{V}{Q}=\frac{300gal}{0.055 m^3/day}*\frac{1m^3}{264.172gal}\\ \\HRT=20.6\,days$

6 0

3 years ago

1) What is the electron configuration of the element with 27 protons?

Romashka [77]

1) cobalt u can tell bc on a periodic table there is a small number that on cobalt is 27.

2) think that would be 11 bc in the 4th shell there can be up to 18 electrons

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3 years ago

How fast the hydrolysis of aspirin occurs allows us to gain information about:_________

ICE Princess25 [194]

Your answer is (C) correct

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3 years ago

What would be the effect on the calculated ratio (mole of copper:mole of iron) if:

kotegsom [21]

Explanation:

Since the ratio is Cu/Fe, if some Fe were lost due to spillage, the Cu/Fe ratio would INCREASE because Fe would be lower.

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3 years ago

The following data was collected when a reaction was performed experimentally in the laboratory. Determine the ammount of NaNO3

zepelin [54]

equalize the coefficients:

Al(NO3)3+3NaCl=3NaNO3+AlCl3

according to the equation 1 mol Al(NO3)3 reacted with 3 moles NaCl. hence, 4 moles Al(NO3)3 should react with 12 moles NaCl, and 9 moles reacted NaCl. So NaCl is limiting, we decide further on this reagent.

\frac{9}{3}=\frac{x}{3}

x=9

9 moles NaNO3

6 0

3 years ago