You need to multiply 15 by 2 since each student is doing 2 trials which gives you 30 (you can think of it as 30 students doing it once if that helps you). Then you have to multiply 30 by 50 since the experiment is being done 30 times and each time requires 50mL which equals 1500mL.
Therefore the teacher needs to make 1500mL of solution for the lab.
I hope this helps.
Answer:
5.0 × 10⁴ g of CO₂
Explanation:
First, we write the balanced equation for the combustion of methane.
CH₄ + 1.5 O₂ ⇄ CO₂ + H₂O
Now, we can establish the following relations:
- 16g of CH₄ produce 44g of CO₂
- 1 GJ = 10⁹ J
- 55 MJ (55 × 10⁶ J) are released for every 1 kg (10³g) of CH₄ burned.
Using proportions,
Objects with more mass have more gravity. Gravity also gets weaker with distance. So, the closer objects are to each other, the stronger their gravitational pull is. Earth's gravity comes from all its mass.
Answer:
3.17mol
Explanation:
moles of Na = m/M ; Where M - molar mass of Na which is 23
moles of Na = 73/23 =3.17mol
but from the eqn n(Na) : n(NaOH) = 2:2 = 1:1
: . moles of NaOH is also 3.17mol
The First option may be correct. Im deeply sorry if im wrong!
FIRST OPTION (A)(1)
