Answer:
group 16 period 2 of the periodic table
note: that is not the electronic configuration, that is the Bohr model.
DNA is one and Grow and Develop i think i could be wong let me know i can read up on it some more
Answer:
Mass of Sodium = 574.75 g
Mass of Chlorine = 886.25 g
Explanation:
The balance chemical equation for the synthesis of NaCl is,
2 Na + Cl₂ → 2 NaCl
Step 1: <u>Find out moles of each reactant required,</u>
According to balance chemical equation,
2 moles of NaCl is produced by = 2 moles of Na
So,
25 moles of NaCl will be produced by = X moles of Na
Solving for X,
X = 25 mol × 2 mol / 2 mol
X = 25 moles of Na
Similarly for Cl₂,
According to balance chemical equation,
2 moles of NaCl is produced by = 1 mole of Cl₂
So,
25 moles of NaCl will be produced by = X moles of Cl₂
Solving for X,
X = 25 mol × 1 mol / 2 mol
X = 12.5 moles of Cl₂
Step 2: <u>Convert each moles to mass as;</u>
Mass = Moles × Atomic Mass
For Na,
Mass = 25 mol × 22.99 g/mol
Mass = 574.75 g
For Cl₂,
Mass = 12.5 mol × 70.90 g/mol
Mass = 886.25 g
Answer:
The answer is 2.3
Explanation:
The model for the population of bacteria is growing by
P= 100 x e^.60t
where P is the number of colonies and t is measured in hours.
Now, we need to find after how many hours will 400 colonies be present
So, Putting value of P = 400 in the above model and obtain the value of t
-> 400 = 100 x e ^.60t
-> 4 = e^.60 t
Take the natural log of ln on both sides
--> ln 4 = ln e ^.60 t
--> ln 4 = .60t
t= ln 4 / .60
T= 2.3
