i can think of 3 subatomic particles found in a nucleus protons, neutrons, and electrons
<h2>Answer : Option A) 2540 g</h2><h3>Explanation : </h3>
Here, the density of the gelatin is known to be as 1.27 .
And the volume 2.0 liter
Here, 2 liters = 2 so to convert it into we have to multiply it, with 1000 to 2000 ,
Using, the formula for density;
ρ =
Here,
ρ = density;
m =mass and v=volume.
Substituting the values given; ρ = 1.27
m = to be found and v = 2000
ρ =
1.27 = m X 2000
m = 2540 g
Therefore, the mass will be 2540 g
Answer:
B. N, O, F
Explanation:
Elements in same row of periodic table will have same number of orbitals.
In option A C and D elements are of different row due to which they posses different number of orbitals.
But in option B. N, O, F are in second row of periodic table so same orbitals.
The required volume of 0.10M NaOH solution that student will add is 20 mL.
<h3>How do we calculate the volume?</h3>
Volume of any solution which is required to prepare buffer will be calculated by using the below equation as:
M₁V₁ = M₂V₂, where
- M₁ & V₁ are the molarity and volume of NaOH solution.
- M₂ & V₂ are the molarity and volume of HF solution.
On putting values, we get
V₁ = (0.1)(20) / (0.1) = 20mL
Hence required volume of NaOH solution is 20mL.
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