1.How many compounds are there in 3.5 mol Be(OH)2? 2.How many grams are there in 1.2 × 10^24 molecules CO2?

3.How many grams are there in 2.1 mol H2O2?

4.How many molecules are there in 14 g N4O4?

5.How many grams are there in 1.81 x 10^24 molecules H2SO3?

6.How many moles are there in 2.4 x 10^24 molecules P2O4?

7.How many compounds are there in 1.5 mol Li2CO3?

8.How many moles are there in 1.2 x 10^24 molecules H2PO3?

2pos suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. ignoring the effects of air resistance, what is the speed (in m/s) of the object after falling 3 seconds? give your answer as a positive decimal without units. answer here

What method(s) do plants use to obtain nitrogen? select all that apply. absorb it from the atmosphere use bacteria to convert nitrogen to usable form obtain usable nitrogen compounds from the soil absorb nitrogen from water taken in at the roots

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.