When a sample of 10.0 g of x is decomposed into its constituent elements (a and d), 4.0 g of a and 6.0 g of d are produced. which of the following laws allows us to predict how much a and d would be produced from an 88.7-g sample of x?

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

Suppose a lab group reports a ppercent yield of sand of 105. is it really possible to collect more sand than was originally represented? what is the possible explanation for the extra product?