Draw a visual summary of all the units in grade 12 chemistry

Rank the values according to magnitude. Please see screenhot. Can someone help me understand this?

Can you help me answer this questions 4 and 5, this is from the previous question I just split my question, thanks

A pure substance that is composed of only one type of atom is______.   Group of answer choices a particulate a homogeneous mixture a heterogeneous mixture an element a macroscopic particle

Scenario Consider the reaction A2+ B₂ = 2AB. If the initial concentration of both A₂ and B2 is 4.0 M, and after 10 minutes the reaction appears to stop. The concentration of [A₂] is now 2.0M

For a chemistry class, a student's grades are weighted as follows: quizzes are 30%, exams are 40%, and the final exam is 30%.   If a student scored 90, 75, and 80 on the quizzes, exams, and final respectively, calculate the student's final grade. Express your answer to three significant figures.

( 5.31 × 10 8 ) + ( 6.53 × 10 7 )

A student determines the density of a metal to be 8.55g/cm3. If the theoretical value is 8.91g/cm3, what is the percent error? Group of answer choices 4.0% 1.2% 3.6% 4.2%

chemistry help need please make sure of sig-fig

A patient provides a urine sample. The density of the patient's urine is 1.0200 g/mL. What is the specific gravity of the urine? specific gravity: The normal specific gravity of urine is 1.002–1.030. Is the specific gravity within the normal range? O No, the specific gravity is not within the normal range. O Yes, the specific gravity is within the normal range.