Which of the following numbers will produce the same number when rounded to two significant figures? (2.3)

2.12

2.10

2.04

2.16

Explain why hydrogen and oxygen are considered elements whereas water is not considered an element.

The molar mass of aniline is 93 g/mol. what is its molecular formula

Which list of elements consists of a metal, a metalloid, and a nonmetal? a. Li, Na, Rb b. Cr, Mo, W c. Sn, Si, C d. O, S, Te

Enter your answer in the provided box. the ph of a bicarbonate-carbonic acid buffer is 7.06. calculate the ratio of the concentration of carbonic acid (h2co3) to that of the bicarbonate ion (hco3-). (ka1 of carbonic acid is 4.2 * 10-7.)

Is PO4^-3 polar, non-polar, or ionic?

When does a spring tide take place? At the beginning of spring Only during the spring season Only after spring is over At any time

The highest cloud are known as

What is the mass of 4.85 X 10^22 atoms of iron (Fe) ?

If element x has 95 protons how many electrons does it have

Which of the following when dissolved in deionized water would make a good conducting solution? a) methanolb) sugarc) baking soda