Answer:
Option B = 60,600 mg (correct option)
Explanation:
First of all we will have an idea which numbers are consider as significant.
1 = All non-zero digits are consider significant figures like 1, 2, 3, 4, 5, 6, 7, 8, 9.
2= Leading zeros are not consider as a significant figures. e.g. 0.02 in this number only one significant figure present which is 2.
3= Zero between the non zero digits are consider significant like 105 consist of three significant figures.
4= The zeros at the right side e.g 3400 are also significant. There are four significant figures are present.
In given options, Option A 60.6 mg have 3 significant figures.
Option B have 5 significant figures.
Option C have 4 significant figures.
Option D have 3 significant figures.
Thus option b is correct option which have more significant figures.
Answer:
The correct choice is E (47 neutrons, 35 protons, 36 electrons)
Explanation:
A ion of net charge -1 means that the ion wins an e-.
We dismiss options B and C.
We also dismiss option A because neutrons + protons = 81.
neutrons + protons = mass number
So we have E and C.
We see that C has 47 neutrons, 36 protons and 36 electrons and, as the atomic number matches the number of protons, we find out on the Periodic Table that the atomic number 36 represents to Krypton, a noble gas. It is impossible! A noble gas never can't be a ion of net charge.
Option E is correct, It is an isotope of Br.
Br has 35 protons (its atomic number)
47 neutrons, that's why it is an Isotope (Br has always 45 neutrons)
As usual, Br has 35 electrons, if it represents a ion of net charge -1, it menas it won 1 e-.
Answer:
I think it's replacement because the B and D just swap places in the end equation
Answer:
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Explanation:
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Answer:
Temperature and Heat Temperature is the measure of the thermal energy of a substance. The hotter an object, the greater the motion of its particles, and the greater the thermal energy. Heat is the transfer or exchange of thermal energy caused by a temperature difference.
Explanation:
