Answer: These celestial bodies are composed of rock or gas and are named after ancient deities.
Explanation:
Earth is the THIRD planet from the Sun and is capable of sustaining life for various organisms.
VENUS ranks as the second planet in our solar system and derives its name from the Roman goddess associated with love and beauty.
MARS, the fourth planet, gets its name from the Roman goddess of war.
Hence, Venus and Mars are NEIGHBORS to EARTH.
Answer:
78.96 g of NaC2H3O2
Explanation:
The following information is provided:
- The solution's volume is 350 mL
- The solution's molarity is 2.75 M
- The molar mass of NaC2H3O2 is 82.04 g/mol
We need to find the mass of the solute:
First, we calculate the number of moles:
Moles = Molarity × Volume
Thus;
Moles of solute = 2.75 M × 0.350 L
= 0.9625 moles
Next, we find the mass:
Mass = Moles × Molar mass
= 0.9625 moles × 82.04 g/mol
= 78.9635 g
= 78.96 g
Therefore, the amount of NaC2H3O2 required is 78.96 g
Answer:
D
Reasoning:
This is due to the belief that at one time, the galaxy was condensed into a minute spot and the Big Bang event initiated the universe's expansion, propelling galaxies outward into space, distancing them from one another. Dark energy is theorized to exert the force from the Big Bang that drives this expansion.
I believe you mean KO2 reacting with H2O. The reaction is 4KO2+2H2O->4KOH +3O2. The mole ratio O2:KO2 is 3:4. Thus moles of O2 produced = 0.500/4*3 = 0.375 mol.
Answer:
When HBCG and BCG^- are at the same concentration, the resulting color is green. This green shade initially becomes visible at a pH of 3.8.
Explanation:
HBCG serves as an indicator formed by dissolving solids in ethanol.
Since
Ka=[BCG−][H3O+][HBCG] When [BCG-] equals [HBCG], it follows that Ka = [H3O+].
<pWith a pH of 3.8,<pKa= [H3O+] = -antilog pH = -antilog (3.8)
Ka= 1.58 ×10^-4
