First we convert kg to g
1kg =1000g
4.70=x(gram)
4.70×1000÷1=4700g
now:
number of moles=mass÷molarmass
number of moles=4700÷65.4
number of moles=71.86moles.
Answer:
see below
Explanation:
A. (1.8 X 10^20) X (2.5 X 10^16)
= 4.5 x 10³⁶
B.(7.9 X 10^9) - (6.0 X 10^8)
= 7.3 x 10⁹
C. (9.2 X 10^19) ÷ (3.0 X 10^7)
= 3.067 x 10¹²
D. (4.2 X 10^9) + (8.0 X 10^18)
= 8.00000002042 x 10¹⁸
Answer:D-when explaining and documenting their work
Explanation:I took the k-12 test and got it right!:) Hope this helps!!!!
The answer is A hopefully it is ok ✅
The weight of a solid gold crown would be much heavier than one if not made of solid gold. It would also not tarnish as quickly as one of other metals.
Hope this helped!