Some constellations, such ad Ursa Minor, are visible in the sky year-round; other contellations appear for only part of the year. explain why this happens.

You are looking at an atom that has the atomic number of 7 and an atomic mass of 16. how many neutrons are there in this atom?

Systematic name for CoBr2

What is the temperature of 0.55 mol of gas at a pressure of 1.5 atm and a volume of 12.6 L?

What is a physical intensive property?

We wish to dilute some 18.4 m h2so4 solution to make 600 ml of a 0.1 m h2so4 solution. how much of the 18.4 m solution should we start with?

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