Answer:
E
Explanation:
The question talks of a PHYSICAL model of the sun. An equation, chart, computer program and paragraph are most definitely not physical models.
Some electric cars are hybrid which consume less gas than your average car.
They will use electricity to run instead of gas which helps the environment
It would be false because you could hurt yourself while trying to get something I t he drawer
The concentration of the solution is also known as Molarity (M). The formula for molarity is
M = mol / liters
We already have the liters, so we only need to find moles. We can find the number of moles by using the molar mass of NaCl and the given amount. That can be found using the elements' atomic weights given on the periodic table.
22.990 (mass of Na) + 35.453 (mass of Chlorine) = 58.443 g / mol
That's how many grams are in one mole of NaCl, but we only have 2.5 grams. So, let's divide and see how many moles we have.
2.5 / 58.443 = .042776 moles
Now we can plug our numbers into the formula.
M = .02138 mols/L
So, your concentration is about .02 mol/L.
K-O-K (put four dots around the O)
Na-O-Na (put four dots around the O)