Chemistry, 04.08.2019 02:30 alexcuevaz90

How many protons, electrons, and neutrons does an atom with atomic number of 47 and mass number of 108?

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An atom contains protons, neutrons and electrons.

The atomic number of an atom equals to the number of protons of that atom, therefore, the number of protons for this atom is 47.

The mass number of an atom equals the sum of protons and neutrons, but not electron, as they're too light. Therefore, to calculate the number of neutrons for this atom, we can subtract the number of protons (which is 47) from the mass number. 108 - 47 = 61. So the number of neutrons is 61.

And for the number of electrons of an atom, it should be the same as the number of protons, or else, it would be an ion instead of an atom. So, the number of electrons for this atom is 47.

In conclusion, the answers are protons:47, electrons:47, neutrons:61

Answer from: Quest

1.consider the following balanced equation and answer parts a through. show calculations for each part.

3 ag(s) + 4 hno3(aq) → 3 agno3(aq) + no(g) + 2 h2o(l)

a. calculate the number of moles of agno3 produced by the reaction of 3 moles of ag with excess hno3. if the number to the left of the compound represents the number of moles of the compound which are present, then 3 moles of ag react with 4 moles hno3 to produce 3 moles agno3 (aq).

so the answer to a would be 3 moles.

b. calculate the number of moles of agno3 produced by the reaction of 108 grams of ag with excess hno3.

i'm not sure how to plug in the grams of silver into an equation using moles to find how many moles are produced.

c. calculate the number of grams of agno3 produced by the reaction of 108 grams of ag with excess hno3

d. calculate the number of moles of no produced as a byproduct of the reaction of 108 grams of ag with excess hno3.

e. calculate the number of grams of no produced as a byproduct starting with 108 grams of ag and excess hno3.

explanation:

Answer from: Quest

Read the sentences below in 1962, i tried to enroll as the first black student at the university of mississippi. the governor of mississippi blocked my entrance which best describes the verbs used in the sentences? o they are past tense verbs, which are often used in narrative essays o they are past tense verbs, which are not often used in narrative essays. o they are future tense verbs, which are often used in narrative essays o they are future tense verbs, which are not often used in narrative essays.

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