Why is excess magnesium oxide used in the formation of magnesium sulfate crystals?

Which is a molecule? A. Ne B. NaCI C. trail mix D. graphene

What does enriching uranuim mean?

You are working in your laboratory and decide to do some cleaning. You find a test tube with some brown substance congealed at the bottom. You take a piece of iron wool to scrub it out, but cannot remove it.

What is the name of the thermodynamic barrier that must be overcome before products are formed in a spontaneous reaction?

What type of observation is the following: 5,000 people? a. quantitative b. qualitative c. both d. neither

Sulfur reacts with oxygen to form sulfur dioxide (SO2 (g), Delta. Hf = - 296.8 kJ/mol) according to the equation below. Upper S (s) plus upper O subscript 2 (g) right arrow upper S upper o subscript 2 (g).

A particle accelerator is used to accelerate particles, at high speeds until the particles fuse together and create a new element

Suppose you will fill a glass with ice cubes. When the ice cubes melt, is the glass still full

Small differences between parents and offspring accumulate over time. This process A. prevents parents from being able to care for their offspring. B. results in only one type of organism that has the exact same characteristics as its ancestors. C.

Use Boyle's, Charles's, or Gay-Lussac's law to calculate the missing value in each of the following. (a) V1 = 2.0 L, P1 = 0.62 atm, V2 = 1.0 L, P2 = ? atm (b) V1 = 230 mL, T1 = ?, V2 = 400. mL, T2 = 298 K K (c) V1 = 0.55 L, P1 = 740 mm Hg, V2 = 0.