Chemistry Homework Help

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Scientific Notation

Q. Consider the following operations on the number 3.11 x 10^-2 Without using a calculator, decide which would give a significantly smaller value than 3.11 x 10^-2, which would give a significantly larger value, or which would give essentially the same value.

Solved • Jan 20, 2020

Scientific Notation

Q. Acetylene, C2H2, can be converted to ethane, C2h6, by a process known as hydrogenation. the reaction is C2H2(g) + 2H2(g) ⇌ C2H6(g) Given the following data at standard conditions (all pressures equal to 1 atm and the common reference temperature 298 K), what is the value of Kp for this reaction? Express your answer using two significant figures.

Solved • Oct 11, 2019

Scientific Notation

Q. how am I suppose to go about with coefficients/powers multiplying and dividing. I am not understanding in videos and he just writes them. doesnt seem like being added or subtracted I dont know what is happening to them. For example on a problem, he wrote, 6.626x10^-34J.S (3.00x10^8m/s/3.25x10^-2m= 6.12x10^-24 J/1 Photon. And I have no idea whats happening with the coefficients he doesnt mention what is ocurring with them ever.

Solved • Oct 9, 2019

Scientific Notation

Q. A chemist needs to know the mass of a sample of Na2SO4 to 6 significant digits. He puts the sample on a digital scale. This is what the scale shows: 014.840 g If the measurement is precise enough for the chemist, round it to 6 significant digits. Otherwise, press the "No solution" button.

Solved • Sep 13, 2019

Scientific Notation

Q. Calculate (5 x 10^3)^-2 Write your answer in scientific notation.

Solved • Sep 2, 2019

Scientific Notation

Q. Rank the following numbers. Rank the following numbers from greatest to least. To rank items as equivalent, overlap them.

Solved • Aug 27, 2019

Scientific Notation

Q. Type the number 0.000354 in scientific notation.

Solved • Aug 27, 2019