Edwin Hubble found out that were appear to be large clouds in space were not gas but

Blue light waves have more energy than red light waves. Which of these situations most likely produces a photoelectric effect? You may assume that the same metal is used in each situation. Check all that apply.

All isotopes of a particular element have the same atomic number. how then do the isotopes of a particular element differ? a. they have less or more protons. b. they have less or more neutrons. c. they have less or more electrons.

When a chemical recstion has oxygen what does it clasify as

Consider four identical 1.0-L flasks containing the following gases each at 0°C and 1 atm pressure. Which sample has the most molecules? Multiple Choice SO2 H2 O2 same for all gases NH3

If it takes five seconds for a sound of thunder to travel 1 mile how many miles is a person from the lightning bolt. If thunder is heard 15 seconds later after lightning

Aqueous hydrobromic acid reacts with solid sodium hydroxide to produce aqueous sodium bromide and liquid water.

Is calcium fluoride a pure substance, element, compound, or mixture?

A fish company delivers 22 kg of salmon, 5.5 kg of crab and 3.48 kg of oysters to your seafood restaurant. What is the mass, in kilograms of the seafood? What is the total number of pounds?

If 38.7 grams of lithium chlorate decomposes, how many grams of oxygen gas can be produced?

Balance the following redox equation in acidic solution using the smallest integers possible and select the correct coefficient for the H + (aq) ion.