Which of these is a mixture?

salad

sugar

water

potassium

How many grams of CO2could be produced from the combustion of 23g of C4H10in the presence of an adequate amount of O2?

The law of segregation increases genetic variation true or false

What volume would 20.0 moles of sulfur dioxide occupy at 75.3 °C with a pressure of 2.16 atm?

The chemical formula for the compound that consists of barium ions (Ba+2) and oxide ions (0-2) is Ba₂O₂ O O² Ba² COBa Bao

A student is given four solid samples labeled W, X, Y, and Z. All have a metallic luster. She is told that the solids could be gold, lead sulfide, mica (which is quartz, or SiO2), and iodine.

Why is photosynthesis so important to plants, and can't animals use it?

One way the government of Kim Jong-il controls the lives of the people who live in North Korea is by a. requiring every citizen to vote. b. controlling information its people receive from the outside world. c. enforcing free trade with other nations.

Give reasons 1) copper utensils and sheets become blackish after some days

Predict the spontaneity of a reaction (and the temperature dependence of the spontaneity) for each possible combination of signs for? H and? S (for the system).

At 29°C, Kp = 5.3 ✕ 102 atm-2 for the following reaction. N2 (g) + 3 H2 (g) equilibrium reaction arrow 2 NH3 (g) When a certain partial pressure of NH3 (g) is put into an otherwise empty rigid vessel at 29°C, equilibrium is reached when 55.