D. propane and hydrogen gass
Answer:
A. The air around you
Explanation:
The air around us is an example of matter, as it is a gas.
Air has no definite shape/volume and has no definite structure, so it is a gas.
Our thoughts aren't matter because they have no physical atoms, and radio waves and heat waves aren't matter either because they are forms of energy.
Answer:
2.03 × 10⁻⁵ M
Explanation:
Step 1: Given data
Concentration of Pb(NO₃)₂: 6.73 ppm = 6.73 mg/L
Step 2: Convert 6.73 mg/L to mol/L
The molar mass of 331.2 g/mol.
6.73 × 10⁻³ g/L × 1 mol/331.2 g = 2.03 × 10⁻⁵ mol/L = 2.03 × 10⁻⁵ M
Step 3: Calculate the molar concentration of Pb²⁺
Let's consider the ionization of Pb(NO₃)₂.
Pb(NO₃)₂(aq) ⇒ Pb²⁺(aq) + 2 NO₃⁻(aq)
The molar ratio of Pb(NO₃)₂ to Pb²⁺ is 1:1. The molar concentration of Pb²⁺ is 1/1 × 2.03 × 10⁻⁵ M = 2.03 × 10⁻⁵ M.
Answer:
= 3.56 atm
Explanation:
Using Boyle's law which states that the volume of a given mass of gas is inversely proportional to the pressure and Charles law states the volume of a given mass of gas is directly proportional to the temperature.
P1/T1 = P2/T2
P1 = 3.1 atm, T1 = 100'C = 100+273 = 373K
T2 = 155'C = 155 + 273 = 428K
3.1/ 373 = P2 / 428
Cross multiply
373 × P2 = 3.1 × 428
373×P2 = 1326.8
Divide both sides by 373
P2 = 1326.8 ÷ 373
P2 = 3.56 atm
I hope this was helpful, please mark as brainliest
EthnoMusicology. its also called Comparative Musicology
