A chart with the densities of several substances is provided. A sample substance has a volume of 26cm3 and a mass of 205.4g. Which metal is it? D=M/V Group of answer choices

Tin

Lead

Aluminum

Iron

Electrons are extremely important to what area of technology? a) anti-aging research b) household product development c) electronics d) drug discovery

In 1901, thomas edison invented the nickel-iron battery. the following reaction takes place in the battery. fe(s) + 2 nio(oh)(s) + 2 h2o(l) fe(oh)2(s) + 2 ni(oh)2(aq) how many mole of fe(oh)2, is produced when 5.35 mol fe and 7.65 mol nio(oh) react?

A5.000 g sample of niso4 h2o decomposed to give 2.755 g of anhydrous niso4. what is the formula of the hydrate? what is the full chemical name for the hydrate? what is the molar mass of the hydrate? niso4•_h2o what is the mass % of water in the hydrate?