<span>Scientific hypotheses, theories, and laws are all means to explain a scientific phenomenon. A hypothesis is a testable observation. There must be a way to test your "if X then Y" statement. A theory, while not always a linear shift from a hypothesis, is an established idea about why something happens, as verified by experimentation. A law is a proven fact about what happens and why.</span>
An hour is 60 minutes. So you multiple the hot by 60. You get 180 minutes plus the 75 remaining minutes. The answer is 255
Answer:
look it up and it gives you the answer in one of the slides ;]
Explanation:
Answer:
Explanation:
So,at STP or NTP, one mole of any gas occupies 22.4 litres of volume. To find mass,firstly we have to calculate the no. Of moles present in 11.2 litres of O2 gas which can be calculated as ;
No. Of moles = Given Volume ÷ 22.4 Litre (provided that gas is at STP)
= 11.2 Litre / 22.4 Litre
= 0.5 moles
Now, mass can be calculated by;
Mass = no. Of moles × Molecular mass
= 0.5 × 32 (Molecular mass of O2 is 32u or 32 g, if you are calculating in Grams, also called Gram Molecular Mass)
= 16 g
This is the answer