The Question that I believe that is the most testable through scientific experimentation would be the first question.
Which gelatin takes longer to set. Gelatin with fruit or gelatin without fruit.
The number of moles of KF needed to prepare the solution is 3 moles
<h3>What is molarity?</h3>
Molarity is defined as the mole of solute per unit litre of solution. Mathematically, it can be expressed as:
Molarity = mole / Volume
<h3>How to determine the mole of KF </h3>
- Volume = 2500 mL = 2500 / 1000 = 2.5 L
- Molarity = 1.2 M
- Mole of KF =?
Molarity = mole / Volume
1.2 = mole of KF / 2.5
Cross multiply
Mole of KF = 1.2 × 2.5
Mole of KF = 3 moles
Learn more about molarity:
brainly.com/question/9468209
#SPJ1
For this problem, we use the formula for radioactive decay which is expressed as follows:
An = Aoe^-kt
where An is the amount left after time t, Ao is the initial amount and k is a constant.
We calculate as follows:
An = Aoe^-kt
0.5 = e^-k(5730)
k = 1.21x10^-4
An = Aoe^-kt
An = 200e^-1.21x10^-4(17190)
An = 25
Therefore, about 175g is produced.
Total number of atoms = 5
<h3>Further explanation
</h3>
The formula of a compound shows the composition of the constituent elements
CaCO₃ is composed of 3 types of atoms, namely Ca, C and O
The amounts of each of these atoms in the compound CaCO₃:
Then total number of atoms :
