Calculate the average atomic mass of carbon if 98.90% of the atoms are C-12 (12.000000 amu) and 1.100% are C-13 atoms (13.003354 amu). Give your answer to the correct number of significant figures.

Which of these is a major source of organic compounds? petroleum coal natural gas all of these

3 During a flame test, a lithium salt produces a characteristic red flame. This red color is produced when electrons in excited lithium atoms (1) are lost by the atoms (2) are gained by the atoms (3) return to lower energy states within the atoms

Which process is a chemical change

Why is NaHCO3 a base? (I need someone to explain it using the ka values) H2CO3 HcO3 - + H + ka = 4.3x10^-7 HCO3 - CO3^2 - + H + ka = 5.61x10^-11 if I underestand correctly, the kb for the second equation is greater than the ka.

A cylindrical can is to be made to hold 1L of oil. Find the height of the can, in centimeters, that will minimize the cost of the metal to manufacture the can. Assume the base, sides and top are made of the uniformly thick metal and ignore seams.

What is a light-year? A. the distance light travels in one earth year B. the distance light travels from the sun to the earth C. the distance light travels in one orbit of the moon D. the time it takes light to travel across the universe

What's is a logical way that you could begin to investigate why your tire had low air pressure?

after balancing the redox equation FeCl3+Zn--->ZnCl2+Fe, what are the coefficients, in order from left to right?

Aluminum oxide, Al2O3, is used as a filler for paints and varnishes as well as in the manufacture of electrical insulators. Calculate the number of moles in 47.51 g of Al2O3.

What volume of 2.00 m must be added to 150.0 ml of 1.00 m chloroacetic acid to produce a buffer solution having a ph of 3.30?