Answer:
mass = 6.56 grams
Explanation:
No of molecules = No of moles × Avogadro's constant
Similarly, number of moles = mass/ molar mass
∴
mass = 6.56 grams
This is the answer (C): Co2
Answer:
2.
Explanation:
When you put the paper in a solution, it will turn blue if it is basic, or red if it is acidic. If it does not change color, it is fairly neutral.
Properties of a compound is completely different from their elements.
Water is composed by hydrogen and oxygen.
For example, the boiling point of oxygen is - 183 °C and hydrogen is - 253 °C, meanwhile, water has a boiling point of 100°C
Another example is when you put a burning wooden splint into oxygen, it burns more brightly. Put it in hydrogen, you may hear a "pop" sound, or even explode when large amount of hydrogen. But if u put a burning splint in water, it goes off.
Answer:
Below -38*C Mercury will freeze. Above 350*C Mercury will begin to boil.
Explanation:
Each element has different boiling and freezing points. For mercury this is these set constraints.