VIL. Long answer questions 1. Calculate the number of water molecule present in one drop of water which weighs 0.188 2 NH2 NH (The atomic mass of nitrogen is 14, and that of hydrogen is 1) I mole of nitrogen 3 moles of hydrogen 8) + 8) 2 moles of ammonia

When a book falls from a shelf to the ground without anyone pushing on it, no work is done on the book. true or false

In which situation has the independent variable for the experiment been changed? check all that apply. changed from counting the number of duckweed at day 0 and day 14 to counting them every day changed from testing duckweed growth in beakers to testing duckweed growth in large outdoor tanks changed from testing the effect of ph on duckweed growth to testing the effect of light levels on duckweed growth changed from testing the effect of acid ph on duckweed growth to testing the effect of basic ph on duckweed growth

Automobile fuel efficiency is often measured in miles that the car can be driven per gallon of fuel (mpg). heavier cars tend to have lower fuel efficiencies (lower mpg ratings). which variable (weight or fuel efficiency) is most naturally considered the explanatory (predictor) variable in this context?