B
A qualitative observation describes the characteristics of a substance without quantifying them.
Answer:True
Explanation:
Water is said to be hard when it contains calcium ions or magnesium ions dissolved in it. These ions are able to react with soap in such a way that the soap is prevented from forming lather with the water. Hard water occurs when water passes over calcium or magnesium bearing minerals and dissolves some of it. Hardness due to the presence of calcium ions can easily be removed by boiling the water.
Answer:
mass P4 = 35.998 g
Explanation:
∴ STP: P = 1 atm; T = 298 K
∴ V O2= 35.5 L
⇒ nO2 = P.V / R.T
∴ R = 0.082 atm.L/K.mol
⇒ nO2 = ((1 atm)×(35.5L))/((0.082 atm.L/K.mol)(298K))
⇒ nO2 = 1.453 mol O2
⇒ mol P4 = (1.453 molO2)×(mol P4/ 5molO2) = 0.2906 mol P4
∴ Mw P4 = 123.895 g/mol
⇒ mass P4 = (0.2906 mol P4)×(123.895 g/mol) = 35.998 g P4
Hello there!
<span>A vegetable garden is 12 meters long by 7 meters wide. It is home 168 mice. What is the population of the mice.
</span>
The size of the vegetable garden is just extra information.
The only information we need is: "<span>It is home 168 mice"
This means the population of mice is 168. Meaning, there are 168 mice living there.
I hope I helped!
Let me know if you need anything else!
~ Zoe</span>
1. Some differences are that they are all different kinds of dogs
2. Small dogs and big dogs
That is all I can answer
