How many joules of heat energy would be needed to raise the temperature of 248 grams of water from 25.0 degrees Celsius to 55.0 degrees Celsius? The specific heat capacity of liquid water is 4.18J / (C x g)

Calculate the volume of 2.5*10-4 moles of h2

Which mixture is homogeneous

The "bleaching" of plant leaves is caused by: A. water pollution B. poor soil quality C. air pollution D. excess bacteria

What is the mass of a neutron?

How many moles of oxygen are needed to burn 425g of sulfur

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?