How much heat must be added to heat 0.750 g of water from 20.0°C to 40.0°C? (Remember, Q=C * m * ΔT) The specific heat of water is 4.186 joule/gram. Question 4 options: A) 322 kJ B) 126 kJ C) 62.8 J D) 62.8 kJ

What waves need mediums to travel

Which of the following species has the greatest number of electrons? 1. Cl1- 2. Co4+ 3. Fe2+ 4. V 5. Sc2-

What is the total number of moles of electrons needed to produce one mole of Mg metal from MgCl2?

In a physical change of matter, A. a chemical change takes place B. molecules break into atoms C. no new substances are formed D. chemical properties change

How many atoms are in 3.08 mol of pure aluminum?

Complete the following statement by checking all that apply Creativity allows scientists to develop multiple approaches to solving problems. adapt to changes in scientific knowledge. look at old problems in new ways.

The atomic weight of hydrogen is 1.00794. a. True b. False

Describe What kind of ions do metals form? What kind of ions do nonmetals form?

A car is driven through streets treated with salt and then parked in a warm garage. a) How will the rate of rusting compare with a car that has not been driven in the streets treated with salt but left parked outside?

Amalgam is an alloy that contains mercury and other metals. Which of these atoms would most likely form metallic bonds with mercury? Check all that apply. bromine copper hydrogen iodine silver tin