tD Page view A Read aloud V Draw Highlight O Erase Certainty (marked on the ruler) and one uncertain digit on report sheet. The unit of the numbered lines is cm for both rulers. Ruler 1 6 Ruler 2 8 10

Two beakers contain clear colorless liquids, when the contents of the beakers are mixed,a white solid is formed (a)is this an example of a chemical or or a physical change(b) what would be the most convenient way to separate the newly formed white solid form the mixture-filtration, distillation, chromatography. elaborate your answer

A dose of aspirin of 5.0 mg per kilogram of body weight has been prescribed to reduce the fever of an infant weighing 8.5 pounds. The number of milligrams of aspirin that should be administered is (note 2.201 lb = 1 kg)

Given that 1 inch = 2.54 cm, 1.00 cm³ is equal to

On average, a 1.3 gram tablet has 500. milligrams of calcium carbonate. What is the mass/mass percent of calcium carbonate in the tablet?

Hi, I'm learning about Density in chemistry , and I'm confused about the exemplos that the professor give me about significant figure, because we told us that 0 is only significant if there is a number bigger then 1 in front . But on the example he give us, the first one he left the 0 but on the second he did not !!

Alie measures out a sample of naphthalene using a graduated cylinder. She reads the measurement as 9.84 mL. The actual volume is 10.29 mL. What is her percent error?

Round  0.00971659  to three significant figures.

I need the answer as soon as possible

a prescription requires 7.55mg per kg of body weight.  Convert this quantity to the number of grams required per pound of body weight and determine the coreect dose in grams for a 175 lb patient.  Iseem to be having a difficult time with the conversions....