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This is a number, as of years, days, minutes, or seconds representing such an interval. The SI standard unit of this is the second.

This is a measure of the quantity of matter.

This is a change in velocity per time.

This is an object's change in motion per unit time in a specified direction.

This is the measured value (always positive) from one point to another.

The ratio of resistance force to effort force.

The process of changing the energy of a system by means of forces. Force x Distance

In the second law of motion it is Mass X Acceleration. The ability to apply a change in velocity on a given object.

The capacity for doing work. It may be transformed from one form to another.

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This is the distance north or south from the equator on the earth's surface.

This is the most commonly used method when trying to measure the volume of an irregularly shaped object

first, consult an activity series chart to determine if al is more reactive than fe. it is, so it will replace the fe. now, one can continue with the problem.

next, make sure you have a correctly balanced equation.

3feo + 2al ==> 3fe + al2o3

now, determine which reactant (feo or al) is in limiting supply.

moles feo present = 125 g x 1 mole/71.8 g = 1.74 moles

moles al present = 25.0 g x 1 mole/26.98 g = 0.927 moles

since from the balanced equation, it take 3 mol feo for every 2 mol al, al will be limiting.

you can determine this simply by dividing moles of each by their coefficient in the balanced equation. for example: 1.74/3 = 0.58 and 0.927/2 = 0.464. al is less, so it is limiting.

finally, using the stoichiometry in the balanced eq. determine mass of fe that can be produced from 0.927 moles of al.

0.927 moles al x 3 moles fe/2 moles al x 55.8 g/mole = 77.6 g

answers: to make sure that all of the broken pieces of tablet were added to the water, to allow for fair comparison of all three trials, with different particle sizes to avoid experimental error

you didnt put any of the following

it forms an anion that has a larger radius. anions have a negative charge and are larger than the original atom.