3 years ago

Which atom has a nucleus they contains 13 proton and 14 neutrons

1 answer:

6 0

The number of protons define the element. Since this element has 13 protons, the element is aluminum. This certain atom is also an isotope of aluminum since the atom can have different numbers of neutrons

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For each phenotype, write the possible genotypes.

Citrus2011 [14]

Answer:

Tall, Res, Dom

short, RES, RES

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3 years ago

1. A 67 kg water-skier is being pulled by a speedboat. The force causes her to accelerate at 3.8

Alborosie

Answer:

254.6N

Explanation:

F=ma

F=67×3.8

F=254.6N

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3 years ago

In the following reaction 2C6H6 + 15O2 12CO2 + 6H2O how many grams of oxygen will react with 10.47 grams of benzene (C6H6)?

IRINA_888 [86]

$2 C_{6}H_{6} + 15O_{2} ----->\ \textgreater \ 12CO_{2} + 6H_{2}O


$

$mol of benzene = \frac{mass}{Mr}$
= $\frac{10.47g}{(6 * 12) (6 * 1) g/mol}$
= 0.134 mol

mol of oxygen:
ratio of $C_{6} H_{6} : O_{2}$
= 2 : 15
= 1 : 7.5

: . mol of $O_{2}$ = 0.134mol * 7.5
= 1.01 mol

Mass of Oxygen = mol * Mr
= 1.01 mol * (16*2) g/mol
= 32.22g

Note: Mr is molar mass

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3 years ago

An endothermic reaction occurs when water and ammonium nitrate are combined. Which of the following statements correctly

rosijanka [135]

Answer:

C.Energy is absorbed because the products have more chemical energy than the reactants.

Explanation:

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2 years ago

When swimmers push against the wall of a pool with their feet, they are pushed away from the wall. Which of Newton's laws explai

Alecsey [184]

It would be his third law

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3 years ago