3.9 grams CaCO3
The mass of 2.0 L of water with a density of 1.00 g/ml is 2000 grams.And 1 ppm of that is 2000 / 1000000 = 0.002 grams. So just multiply by the ppm of CaCO3, giving 0.002 g * 1.95x10^3 = 3.90 grams.
Since the least accurate datum we have is 2 significant figures, the result should be rounded to 2 significant figures, giving 3.9 grams.
1 or 8 i believe would be the answer
Answer :
Explanation : When diatomic hydrogen gas and diatomic nitrogen gas reacts spontaneously it forms ammonia gas as the product.
we will have the following reactions; As all the reactants and products are in the gaseous state the subscript (g) is given to the molecules.
But this is not a balanced equation, as on the right side of reactants we have 2 hydrogen atoms and 2 nitrogen atoms which gives the product which has one nitrogen and three hydrogen in the compound state.
So, balancing the equation, we get,
We multiplied 2 with the diatomic hydrogen molecule which resulted in production of 2 moles of ammonia as the product.
So, the complete balanced equation is;
Answer:
They are solid (with the exception of mercury, Hg, a liquid).
They are shiny, good conductors of electricity and heat.
They are ductile (they can be drawn into thin wires).
They are malleable (they can be easily hammered into very thin sheets).
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Water is a pure substance, a compound made of hydrogen and oxygen. Water is rarely found naturally in its pure form.