Answer: Yes, they have.
Explanation: The frequency, severity, and length of heat waves are increasing. Heat and humidity already kill an average of 1,300 people in the U.S. each year. Deadly heat waves of at least 20 days affect 30% of the earth's population. That will increase to 75% by 2100 if global warming isn't stopped.
Answer:
i know it is alot but that is how are teacher told us to do, hope this is correct
Explanation:
a. 2.6
b. 12.0
Explanation:
a.
First, we will calculate the molar concentration of HCl.
M = mass of HCl / molar mass of HCl × liters of solution
M = 0.40 g / 36.46 g/mol × 4.5 L
M = 2.4 × 10⁻³ M
HCl is a strong monoprotic acid, so [H⁺] = 2.4 × 10⁻³ M. The pH is:
pH = -log [H⁺]
pH = -log 2.4 × 10⁻³ = 2.6
b.
First, we will calculate the molar concentration of NaOH.
M = mass of NaOH / molar mass of NaOH × liters of solution
M = 0.80 g / 40.00 g/mol × 2.0 L
M = 0.010 M
NaOH is a strong base with 1 OH⁻, so [OH⁻] = 0.010 M. The pOH is:
pOH = -log [OH⁻]
pOH = -log 0.010 = 2.0
The pH is:
14.00 = pH + pOH
pH = 14.00 - pOH = 14.00 - 2.0 = 12.0
Explanation:
Carbon black sphere
Nitrogen blue sphere
Chlorine green sphere
Hydrogen white sphere
Reactants:
three molecules that contain one black sphere and four white spheres
3CH₄
three molecules that contain two blue spheres and four green spheres:
3N₂Cl₄
Products:
three molecules that contain one black sphere and four green spheres:
3CCl₄
three molecules that contain two blue spheres:
3N₂
six molecules that contain two white spheres
6H₂
The reaction proper:
3CH₄ + 3N₂Cl₄ → 3CCl₄ + 3N₂ + 6H₂
Learn more:
Chemical reactions brainly.com/question/4216541
#learnwithBrainly
I believe that would be D] CuSO4(s).
Answer:
1. stir with a spoon
Explanation:
if you stir the water with a spoon, it quickens the process at which the sugar dissolves. The spoon you could say also speeds it all up. Think of it this way, a meteor entering earths atmosphere, will it get smaller faster going 50 mph, or 100mph? the regular is 50, but when you got the spoon, it increases (more gravity force on the meteor= that 100mph).
hope this helps.
