To get the empirical formula of the compound, we convert each mass percentage to mole percentage by dividing each to corresponding molar mass. 75% mass of carbon is 6.25 while 25% hydrogen is 25. We divide 25 by 6.25, we get 4. Hence, the empirical formula is CH4.
Answer:
I am so sorry I do not know this
Explanation:
2Nal+CaCl2 should be right
The majority of metals are found in ores.
But a few such as copper, gold, platinum, and silver frequently occur in the free state because they do not readily react with other elements.
Answer:
15 g of solute (HNO₃) are contained in 100 g of solution
Explanation:
There are many kind of concentrations, Molarity, molality, ppm, percent by volume, percent by mass.
Molarity for example are the moles of solute in 1L of solution.
Molality can be defined as the moles of solute in 1kg of solvent.
ppm are the mg of solute in 1kg of solution.
Percent by volume are the volume of solute (mL) in 100 mL of solution.
In this case, percent by mass is the way to say that x grams of solute are contained in 100 g of solution.