Answer:
Carbon dioxide gas
Explanation:
When an animal breathes, it takes in oxygen gas and releases carbon dioxide gas into the atmosphere.
Explanation:
b and c are true statements
A buffer has roughly equal concentrations of a weak acid and its conjugate base. The only acids in the question are HNO3 and HNO2. HNO3 is a strong acid, so it can’t be used for a buffer. The first option has HNO2 and hydrochloric acid, which won’t supply the conjugate base of HNO2, which is NO2^-1. NaCl isn’t an acid or a base, so we can eliminate that as well. That leaves us with HNO2 and NaNO2. Group 1 metals are spectators in acid-base equilibria, so we can ignore Na once it disassociates. That will give us .1M HNO2 and .1M NO2^-1, which is what we want.
Answer:
23 atm
Explanation:
Step 1: Given data
- Initial volume (V₁): 2.5 L
- Initial pressure (P₁): 90 atm
Step 2: Calculate the final pressure of the gas
If we assume constant temperature and ideal behavior, we can calculate the final pressure of the gas using Boyle's law.
P₁ × V₁ = P₂ × V₂
P₂ = P₁ × V₁ / V₂
P₂ = 90 atm × 2.5 L / 10 L = 23 atm
As expected, since the volume increased, the pressure decreased.
Answer:
have the same molecular formula and coordination number
Explanation:
Coordination sphere isomers refer to two or more coordination compounds which have the different compositions within the coordination sphere (i.e., the metal atom plus the ligands that are bonded to it) i.e., the connectivity between atoms is different.
Let us show a typical example;
[Cr(NH3)5(OSO3)]Br and [Cr(NH3)5Br]SO4
The molecular formula and coordination number of the both compounds are the same but atom-atom connections differ. In one compound, sulphate ion is outside the coordination sphere while in its isomer, the sulphate ion is inside the coordination sphere.