Chemistry (Check)
posted by Bryan .
classify each of these statements as always true, sometimes true, or never true.
__ST___11)The unit of a conversion factor must cancel.
__AT___12)the conversion factor for changing grams and milligrams is 1g/1000mg
___ST__13)multiple conversions factors can be used to solve complex conversion problems.
___NT____14)if density=mass/volume, then mass= density/volume.
____NT_____15)when two measurements are equal, a ratio of these two measurements will equal unity.
14 is ok.
15 is not. If two measurements are equal, for example one measurement is 14 and the other is 14, then 14/14 = 1, nicht wahr?
11. Confusing to me. I don't know that they MUST cancel. It depends upon what is being done.
12. Again I am confused. As it is written with grams AND milligrams, the factor 1g/1000 mg is ok but it might be the inverted form in some cases.
The factor IS 1/1000
13. I tend to think multiple conversion factors will always work if we can find the factors.
I hope this helps a little.
Respond to this Question
Similar Questions

Chemistry (Check)
Classify each of these statements as always true, sometimes true, or never true 11)sometimes true 12)Never True 11)Scientific notation is used to express large numbers in convenlent form. 12)Siginificant figures include all the digits … 
Chemistry (Check)
Classify each of these statements as always true, sometimes true or never true. __NT___11. The SI base unit of mass is the milliliter. __AT___12. A decigram is 100 times smaller than a gram. ___ST__13. The SI unit of volume is derived … 
Chemistry (Check)
Completion 1)1 2)conversion factor 3)change 4)Dimensional anaylsis 5) Whenever two measurement are equal, or equivalent, a ratio of these two measurements will equal ___1____. A ratio of equivalent measurement is called a ___2___. … 
Chemistry (Check)
Are most factors unity? Is this True or false I'm thinkin true.. The actual size of a measurement multiplied by a conversion factor remains the same, beacause the measurement being converted is multiplied by unity. okay 
Chemistry (Check)
Classify each of these statements as always true, sometimes true, or never true. 7____AT____It is necessary to know the formula of a compound in order to calculate its percent composition. 8___ST_____If the percent by mass of carbon … 
Chemistry check
Can someone make sure I have the right answer. The question is: Classify the statement as always true, sometimes true, or never true. A net ionic equation shows all ions present. I say never true because it only shos soluble strong … 
math
Determine whether the statement is always true, sometimes true, or never true. 3) The length of the hypotenuse of a right triangle equals the length of one of the legs of the triangle. Answer choice: a.) always true b.) sometimes true … 
geometry
Is it always true, sometimes true, or never true that the centroid is outside its associated triangle? 
Math
a.)If ABCD is a parallelogram, then ABCD is (always true, sometimes true, OR never true) a rectangle. b.)The diagonals of a square (always true, sometimes true, OR never true) bisect each other. c.)If WXYZ is a rectangle, then the … 
Math
Is it sometimes, always or never true that a number is a factor and a multiple of itself?