I think the answer is D. Periods 6-7, Because t<span>he periods that would contain elements with electrons in s, p, d, and f orbitals are periods 6-7.

(I hope this helps you a lot! :) Have a nice day!)</span>

7 0

3 years ago

what is the quotient of 8.01 grams divided by 3.127 grams expressed to the correct number of signicant figures

likoan [24]

Your going to want to round 8.01 to 8.01 and change 3.127 rounded too 3.1
then u want to take 8.0 and 3.1 and times it and u will get 24.8 or 25

7 0

3 years ago

Read 2 more answers

An unused flashbulb contains magnesium and oxygen. After use, the contents are changed to magnesium oxide but the total mass doe

harkovskaia [24]

Answer: Law of conservation of mass explains these observations.

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products formed must be equal to the mass of reactants taken.

In order to get the same mass on both sides, the atoms of each element must be balanced on both sides of the chemical equation.

$2Mg+O_2\rightarrow 2MgO$

Mass of reactants= mass of Mg+ mass of $O_2$ = 48 g + 32 g = 80 g

Mass of products = mass of $MgO$ = 80 g

Thus mass of reactants is equal to mass of products, thus law of conservation of mass is obeyed.

7 0

3 years ago