Which element has an ion that is smaller than an ion of calcium? potassium strontium cesium magnesium

Methane burns in oxygen to produce carbon dioxide and water. Which of the following represents correct chemical formulas? reliminary, unbalanced equation with the A. CH4 + O2 - CO2 + H20 B. CH4 + CO2 + O2 + H2O C. CO2 + H20 - CH4 + O2 D.

Liquid sodium is being considered as an engine coolant. How many grams of liquid sodium (minimum) are needed to absorb 1.00 MJ of energy (in the form of heat) if the temperature of the sodium is not to increase by more than 10.0 °C? Use CP = 30.

How the relative density of a substance is related to the density calculate the density of iron if its relative density is 2 and a density of water is 2gcm - 3

How many total atoms are in 0.510 g of p2o5?

What changes in color occur when bromine and kmno4 reacts with an alkene?

Which of the following choices would have a negative entropy change? A. N2 (g) + 3H2 (g) - >2NH3 (g) B. CaCO3 (s) - > CaO (s) + CO2 (g) C. H2O (s) - > H2O (l) D. Fe2O3 (s) + 3C (s) - > 2Fe (s) + 300 (g)

Increasing the temperature of a liquid-solid solution will:

What is the most abundant substance dissolved in sea water? magnesium chloride sodium chloride

Problem 5.32 - enhanced - with feedback the rolling resistance for steel on steel is quite low; the coefficient of rolling friction is typically μr=0.002. suppose a 180,000 kg locomotive is rolling at 22 m/s on level rails.

Gina made a poster for plastic recycling week and included this information on her poster: What corrections should Gina make? Check all that apply. Gina should put "cellulose" under "Synthetic." Gina should put "plastic" under "Natural.