Question

A student balanced the chemical equation Mg + O2 → MgO by writing Mg + O2 → MgO2. Was the equation balanced correctly? Explain your answer. If the equation was not balanced correctly, write the correctly balanced equation.

I wrote No, it was not because Magnesium oxide is 2MgO and not MgO2
The correct balanced equation is

2 Mg + O2 >> 2MgO which is wrong

Answer 1

@mr.singh help please

Answer 2

but u are correct

Answer 3

well the teacher said u r wrong and she said retry again

Answer 4

may be u should form one mgo by using 1/2o2

Answer 5

i will give a try anyways thnxs bro :)

Answer 6

@mr.singh On the periodic table, there are two numbers in the block for the element potassium, K: 19 and 39.098. What are these two numbers, and what do they represent?

Answer 7

is this answer correct "The atomic number (number of protons) and the atomic weight (mass of one atom of the element)"

Answer 8

one is mass no. , other is atomic no........ mass no. represents mass of total no. of neutrons nd protons where as at. no. represents no. of protons

Answer 9

19 IS WHICH AND 39.098 IS WAT

Answer 10

@mr.singh U DER

Answer 11

since the mass of electrons is negligible , ur defination is also vorrect.. 19 is at. no.
remember mass no.>at. no. ... always

Answer 12

ohhh ok

Answer 13

Mr. Singh is incorrect. the number on the periodic table is average atomic mass - the average of isotopes. mass number is only protons+neutrons for a specific isotope. each element has many isotopes - the mass of each (Carbon-12, Carbon-13, Carbon-14) and its occurrence is averaged together for the number on the periodic table.