Which of these elements has two valence electrons? A. hydrogen B. barium C. nitrogen D. krypton E. bromine

How is dumping our waste different from dilution and dispersion?

Which atom has the smallest atomic radius? cs k li fr submit answer?

How many moles of ethyl alcohol, C2H6O, are in a 21.0g sample

Saltpeter is a compound made of potassium (k), nitrogen (n), and oxygen (o). every 100.00 g of saltpeter contains 38.67 g potassium and 13.86 g nitrogen. what is the mass of oxygen contained in 328.0 mg of saltpeter

Place the following categories in order from least specific to most specific:A) monocot; B) angiosperm; C) eukaryote; D) seed plant.

Which indicator will be the same color in hydrochloric acid as it is in pure water? 1. methyl orange 2. phenolphthalein 3. bromcresol green

Based on your knowledge of energy resources conservation, which of the following statements is true? a) Manufacturers can increase a light bulb's energy efficiency by using technology that decreases the amount of electromagnetic energy the bulb

Ammonia (nh3 (g), hf = - 46.19 kj/mol) reacts with hydrogen chloride (hcl (g), hf = - 92.30 kj/mol) to form ammonium chloride (nh4cl (s), hf = - 314.4 kj/mol) according to this equation:

How does an electromagnet create a magnetic field

Magnetism, reactivity, and fluorescence are three special properties used to identify minerals. true or false