3 years ago

Which is a factor in determining the average atomic mass of an element

1 answer:

4 0

The mass numbers of the different isotopes of that element are averaged according to their respective abundances in nature.

You might be interested in

How much of 45 grams of pu 234 remains after 27 hours if it’s half life is 4.98 hours

nadya68 [22]

Answer:

1.07 g

Explanation:

Half-life of Pu-234 = 4.98 hours

Initially present = 45 g

mass remains after 27 hours = ?

Solution:

Formula

mass remains = 1/ 2ⁿ (original mass) ……… (1)

Where “n” is the number of half lives

To find "n" for 27 hours

n = time passed / half-life . . . . . . . .(2)

put values in equation 2

n = 27 hr / 4.98 hr

n = 5.4

Mass after 27 hr

Put values in equation 1

mass remains = 1/ 2ⁿ (original mass)

mass remains = 1/ 2^5.4 (45 g)

mass remains = 1/ 42.2 (45 g)

mass remains = 0.0237 x 45 g

mass remains = 1.07 g

6 0

4 years ago

Use a sheet of paper to answer the following question. Take a picture of your answers and attach to this assignment. Predict the

romanna [79]

Answer:1-methoxy-2,4-dinitrobenzene

Explanation:

The nitro groups are strongly electron withdrawing and promote nucleophilic substitution reactions where one of the original substituents is removed and replaced by a strong nucleophile such as the methoxy group. The mechanism of the reaction is attached below. The electron withdrawing nitrogroup assists the formation of the intermediate in the reaction as shown.