Why do scientists need a scientistc models

How many acids are there

Select the set of compounds that have the same empirical formula a. H2O and H2O2 b. N2O4 and NO2 c. CO and CO2 d. CH4 and C2H6

The temperature of a 500 ml sample of gas increases from 150 k to 300 k. what is the final volume of the sample of gas, if the pressure in the container is kept constant?

5. How many significant figures are in the measurement + 0.500 mg? two three four five

How to convert moles to molecules

plate a and plate b are both continental plates. what is ghe most likely result if the two plates collide?

According to the second law of thermodynamics, the entropy of any system always increases. According to the second law of thermodynamics, the entropy of any system always increases. True False

If the density of Cu is 8.96g/cm cubed, what is the volume of 28kg of Cu?

A piece of iron can change in different ways. How is iron bending different from iron rusting?

Which organism would least likely be selectively bred A) Dandelions B) Nantes Carrots C) Belgian Blue Cattle D) Hypoallergenic Cats