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Alex777 [14]
3 years ago
6

Whic number of the periodic table is the atomic number and which number is the atomic mass?

Chemistry
1 answer:
Anettt [7]3 years ago
5 0

Answer:

The mass number (represented by the letter A) is defined as the total number of protons and neutrons in an atom. Consider the element helium. Its atomic number is 2, so it has two protons in its nucleus.

The atomic mass of a single atom is simply its total mass and is typically expressed in atomic mass units or amu. By definition, an atom of carbon with six neutrons, carbon-12, has an atomic mass of 12 amu.

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Compound A serves as a prodrug for the analgesic benzocaine. (A prodrug is a pharmacologically inactive compound that is convert
NemiM [27]

Answer:

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Explanation:

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3 0
3 years ago
For the reaction below, identify the excess reactant when 4.35 g of hydrogen reacts with 30.75 g of iodine to produce hydrogen i
kogti [31]

The excess reactant when 4.35 g of hydrogen reacts with 30.75g of hydrogen iodide is  hydrogen

<h3>calculation</h3>

write the equation for the reaction

H2(g) + I2 (g) → 2HI (g)

find the mole of each reactant

moles = mass/molar mass

moles of H2= 4.35 g/2 g/mol=  2.175  moles

moles o I2 = 30.75 g/ 254 g/mo=0.1211 moles

0.1211 moles of I2 reacted with 0.1211 moles of H2 but there are more moles of H2 there Hydrogen was in excess

6 0
4 years ago
(20 Points) Which definition of "coarse" matches its use in the phrase "coarse focus?"
vlada-n [284]

Answer by YourHope:


Hi! :)


Which definition of "coarse" matches its use in the phrase "coarse focus?"


A) "rough in texture"


Have a BEAUTIFUL day~

7 0
3 years ago
Read 2 more answers
How many milliliters of 4.00 m hcl(aq) are required to react with 2.75 g of zn(s)?
Anna007 [38]
25 milliliters are required
7 0
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A solution of sodium iodide is added to a solution of potassium nitrate to make a potassium iodide precipitate and a sodium nitr
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Answer:

NaNO3

Explanation:

Sorry If its incorrect

4 0
3 years ago
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