Answer:
SnH4
Explanation:
Because the melting point of SnH4 is higher than CH4
Answer:
The 3rd answer down.
Na²O (sodium oxide) will be a base when exposed to water H²O
Explanation:
Sodium Oxide Na²O, will become Sodium Hydroxide after being exposed to water (at 80% I believe).
The oxygen ion in Na²O has 2 extra electrons which makes it highly charged and very attractive to hydrogen ions. The attraction is so strong that when Na²O comes in contact with H²O, the O(-2) strips off a hydrogen from water, forming 2 x OH ions which of course are still strongly basic.
Because they didn’t go extinct at the same time
Answer:
2 x 2 = 4
Explanation:
Multiplication is just doubling the numbers depending on what you have. 3 x 3 = 9 because 3 three times is 9. Therefore, 2 two times is 4.
This question is an incomplete question, here is a complete question.
Perform the following calculation. Report the answer using the proper number of significant figures.

Answer : The answer will be, 
Explanation :
Significant figures : The figures in a number which express the value -the magnitude of a quantity to a specific degree of accuracy is known as significant digits.
The rule apply for the multiplication and division is :
The least number of significant figures in any number of the problem determines the number of significant figures in the answer.
The rule apply for the addition and subtraction is :
The least precise number present after the decimal point determines the number of significant figures in the answer.
The given expression is,



In the given expression, 1.012 has 4 significant figures, 0.025456 has 5 significant figures and 0.0115 has 3 significant figures. From this we conclude that 3 is the least significant figures in this problem. So, the answer should be in 3 significant figures.
Thus, the answer will be 