Hello!
Answer: 14.3%
Explanation: In order to find the mass percent of hydrogen in this compound, you must determine how many grams of hydrogen you'd get in 100 g of compound.
In your case, you know that an unknown mass of hydrogen reacts with 0.771 g of carbon to form 0.90 g of hydrocarbon, which is a compound that contains only carbon and hydrogen.
Use the total mass of the hydrocarbon to determine how many grams of hydrogen reacted with the carbon.
Now, if 0.90 g of this compound contain 0.129 g of hydrogen, it follows that 100 g of this compound will contain.
So, if 100 g of this compound contain 14.33 g of hydrogen, it follows that the mass percent of hydrogen is 14.3%
Hope this Helps! Have A WONDERFUL Day! :)
X₂O₃ ===> 3 moles of oxygen == > 48 g O
Molar mass of X₂O₃-------------- 48g O
30,6g --------------------------------- 14,4g
Molar mass = (30,6×48)/14,4
Molar mass = 102g
Molar mass of X₂ = 102 - 48 = 54g
Molar mass of X = 54/2 = 27g
X ==> 27 g/mol ==> Al
X₂O₃ ==> Al₂O₃
:)
Answer:
HIIT workouts are anaerobic, and cardiovascular endurance workouts are usually aerobic, depending on how much you work out. If you changed speed and switched to a different workout immediately after what you did before, your heart rate would increase, and you would experience pain on the side of your abdominal. It can be because your body isn’t used to the change in speed and endurance.
Answer:
Sometimes you just have to get yourself hard to understand what you are really going through and how much you have done and how hard you are.
Explanation:
Tbh not all quotes are easy to express but this one sounds really interesting.
But in my opinion this is the best I could describe
Hope you agree. Let me know :)
