convection is the transfer of heat through the air
A density of a substance is constant. It is an extensive property, meaning it does not depend on the amount of substance because it is a ratio of mass to volume. No matter how much of each there is, they would always have a fixed ratio called density. For lead, the density is
Density = mass/volume
Density = 23.94 g/ 2.10 cm³
Density = 11.4 g/cm³
Explanation:
yes you got the right idea
Answer:
energy is being used to make or break bonds between molecules
Explanation:
if correct please consider brainliest
Answer:
Explanation:
We must look up the standard reduction potentials for the half-reactions.
<u> ℰ° </u>
Cr₂O₇²⁻ + 14H⁺ + 6e⁻ ⇌ 2Cr³⁺ + 7H₂O 1.36
Cl₂ + 2e⁻ ⇌ 2Cl⁻ 1.35827
2IO₃⁻ + 12H⁺ + 10e⁻ ⇌ I₂ + 6H₂O 1.195
Fe³⁺ + e⁻ ⇌ Fe²⁺ 0.771
(a) Cr³⁺/Cl₂
We reverse the sign of ℰ° for the oxidation half-reaction. Then we add the two half-reactions and their ℰ° values.
<u> ℰ°/V </u>
2Cr³⁺ + 7H₂O ⇌ Cr₂O₇²⁻ + 14H⁺ + 6e⁻ -1.36
<u>Cl₂ + 2e⁻ ⇌ 2Cl⁻ </u> <u>1.358 27
</u>
2Cr³⁺ + 3Cl₂ + 7H₂O ⇌ Cr₂O₇²⁻ + 6Cl⁻ + 14H⁺ 0.00
(b) Fe²⁺/IO₃⁻
<u> ℰ°/V
</u>
Fe²⁺ ⇌ Fe³⁺ + e⁻ -0.771
<u>2IO₃⁻ + 12H⁺ + 10e⁻ ⇌ I₂ + 6H₂O </u> <u> 1.195
</u>
10Fe²⁺ + 2IO₃⁻ + 12H⁺ ⇌ 10Fe³⁺ + I₂ + 6H₂O 0.424
The ℰ° values for the cells are