Answer:
The answer to your question is 17.26 g of NaNO₃
Explanation:
Data
mass of NaNO₃ = ?
volume = 625 ml
concentration = 0.325 M
Process
1.- Convert volume to liters
1000 ml ----------------- 1 L
625 ml ---------------- x
x = 625 / 1000
x = 0.625 L
2.- Find the moles of NaNO₃
Molarity = moles / volume
solve for moles
moles = Molarity x volume
substitution
moles = 0.325 x 0.625
simplification
moles = 0.203
3.- Convert moles to grams
molar mass of NaNO₃ = 23 + 14 + (16 x 3)
= 85 g
85 g ------------------ 1 mol
x ------------------ 0.203
x = (0.203 x 85) / 1
x = 17.26 g
Hey there!
Na is sodium, which has 11 protons.
The more realistic amount of neutrons for this atom to have is 12. 23 would be the sum of protons and electrons.
The atom has a charge of 1+, so there is one less electron than protons, so
11 - 1 = 10 electrons.
Your answer is d. it has 11 protons, 10 electrons, and 12 neutrons.
Hope this helps!
Answer:
Object B has a density of 2.5 g/cm³ which is greater than object A by 1 g/cm³
Explanation:
Since we know that the formula for density is d=m/v, we can divide each mass by its corresponding volume to find the densities
12/8=1.5
20/8=2.5
So we know that object B has a greater density than object A by 1 g/cm³ (gram per cubic centimeter). Also the standard unit for density is kilograms per cubic meter but I used gram per cubic centimeter since they were the given units. 1cm=100m, 1000g=1km
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