Answer:
It's the first option.
Explanation:
The atomic number tells us the number of protons in the nucleus of an atom.
It is the number which identifies an atom.
The hormone that promotes active tubular secretion of potassium ions into, along with sodium absorption from filtrate in the distal convoluted tubule and collecting duct is Aldosterone. This hormone is produced by the adrenal gland and acts mainly in the functional unit of the kidney to aid in the conservation of sodium, secretion of potassium, water retention and to stabilize blood pressure. It indirectly regulates blood levels of electrolytes and helps to maintain the blood pH.
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Wait… what do you need help with lol
Mass of SiC = 2 g
<h3>Further explanation</h3>
Given
Reaction
SiO₂(s) + 3C(s) → SiC(s) + 2CO(g)
3.00 g of SiO₂
4.50 g of C
Required
mass of SiC
Solution
mol SiO₂ (MW=60,08 g/mol) :
= 3 g : 60.08 g/mol
= 0.0499
mol C(Ar = 12 g/mol) :
= 4.5 g : 12 g/mol
= 0.375
mol : coefficient of reactants =
SiO₂ : 0.0499/1 = 0.0499
C : 0.375/3 = 0.125
SiO₂ as a limiting reactant(smaller ratio)
Mol SiC based on mol SiO₂ = 0.0499
Mass SiC :
= mol x MW
= 0.0499 x 40,11 g/mol
= 2 g
