Cecil is working with samples of chlorine (CI), oxygen (O), bromine (Br), and silver (Ag). The samples are all at room

Chemistry

2 answers:

ANTONII [103]3 years ago

7 0

Answer:

silver

Explanation:

Silver is a metal at room temperature.

The physical state of matter can help us know which of these substances will be the most dense. Density deals the amount of substances per unit volume.

Solids are packed closely and have a definite and ordered arrangement of their atoms. From the list above only Silver is a solid at room temperature.

Bromine is a liquid at room temperature while chlorine and oxygen are gases at room temperature. Liquids and gases do not have more substances per unit volume compared to solids. Therefore, silver should be the most dense.

anygoal [31]3 years ago

5 0

Answer:

The answer is silver. Silver is the most dense, it's a solid so it is more compact and is obviously the most likely to have more mass to it. option D

Explanation:

You might be interested in

You are instructed to create 900. mL of a 0.29 M phosphate buffer with a pH of 7.8. You have phosphoric acid and the sodium salt

Aleksandr [31]

Answer:

B and C

Explanation:

When we have to do a buffer solution we always have to choose the reaction that has the pKa closer to the desired pH value. When we find the pKa values we will obtain:

$pKa_1=-Log[6.9x10^-^3]=2.16$

$pKa_2=-Log[6.2x10^-^8]=7.20$

$pKa_3=-Log[4.8x10^-^13]=12.31$

The closer value is pKa2 with a value of 7.2. Therefore we have to use the second reaction. In which $H_2PO_4^-^1$ is the acid and $HPO_4^-^2$ is the base. Therefore the answer for the first question is B and the answer for the second question is C.