Counting ten bikes on a bike rack is an example of a qualitative observation.

This graph shows the change in the force of gravity as distance increases. The graph will never reach zero, which suggests that A) gravity cannot cross space. B) the force of gravity does not change regardless of distance.

by trial and error, find the largest number that can be added to 6.022 * 1023 without changing its displayed value (as shown on the screen).

At constant temperature, a sample of helium at 760. torr in a closed container was compressed from 5.00 l to 3.00 l, with no change in moles or temperature. what was the new pressure exerted by the helium on its container?

Exactly 12.0 grams of potassium chlorate is placed in a reaction vessel; following the decomposition, 1.55g of kClO3 - remain unreacted. Calculate the total volume of oxygen collected at 25 degrees celsius and 0.95atm.

What is the approximate mass of one mole of chromium

ou were instructed to rinse the filter pipettes with methanol and with hexane. Obviously thereason for this is to remove any contaminants that may be present on the glass or cotton.

Calculate the volume of 1 M NaOH needed to prepare 10.0 ml of a 0.10 M solution.

Which best describes why NH4 + can form an ionic bond with CL-?

Select the correct answer from each drop-down menu. Plants use sunlight to convert nutrients into energy. What form of energy transfer is taking place? The energy of the Sun is converted into energy by the plants.

How many minutes would it take a radio wave to travel from venus to earth?