An isotope has 2 naturally occurring isotopes . X-107 has an abundance of 51.82% and a mass of 106.9 amu. X-109 has a relative abundance of 48.18% and a mass of 108.9 amu. Calculate the atomic mass. Identify the unknown element . Show work.

Cucl2 + 2nano3 cu(no3)2 + 2nacl what is the percent yield of nacl if 31.0 g of cucl2 reacts with excess nano3 to produce 21.2 g of nacl? 49.7% 58.4% 63.6% 78.7%

Remember to use the proper number of significant figures and leading zeros in all calculations. gelatin has a density of 1.27 g/cm³. if you have a blob of gelatin dessert that fills a 2.0 liter bottle, what is its mass? 2540 g2500 g3.9 x 10-43.937x 10-4

Define dew point. i am writing this part to be able to ask the question