How many moles of copper are present in a sample of tennanite with a mass of 2450 grams

How many molecules of glycerol (c3h8o3; molecular mass = 92) are present in 1 l of a 0.5 m glycerol solution?

2. An electric heating element is connected to a 110 V circuit and a current of 3.2 A is flowing though the element. How much energy is used up during a period of 5 hours by the elemets? A. 550 Wh B. 2,580 Wh C. 352 Wh D. 1,760 Wh

How many moles are there in 25.0 grams of KMnO4

How many hydrogen bonds can CH3-O-CH2OH form with water?

How many co2 molecules are generated from each pyruvate that enters the mitochondria?

Luis set a glass of ice water out side is the sunshine. when he looked at the glass 10 minutes later, the contents had changed. what kind of change happened to the ice water? A. evaperation B. conduction C. chemical change d. sudden change

A substance is considered to have a smaller surface area when ... A. it is a fine powder B. it is in large chunks C. you have a small amount of the substance D. you have a large amount of E. the substance

Which is the noble gas notation for chlorine? A-[Ne] 4s2 4p5 B-[Ne] 3s2 3p5 C-[Ne] 3s2 3p3 D-[Ne] 3p2 3p5

Is argon long hand or noble gas

Lithium, beryllium, and boron are elements with atomic number 3, 4, and 5, respectively. Even though they are three of the five simplest elements, why are they rare compared to many heavier elements?