What is stoichiometry in chemistry?

A person tries to pour exactly one kilogram of sand onto a scale on five different occasions. The actual amounts he pours are shown below: 0.80 kg, 0.90 kg, 1.0 kg, 1.1 kg, 1.2 kg Which of the following best describes his results? A.

Which of the following is the best definition of baryonic material? A. form of hypothetical energy that makes up most of the universe B. type of matter that we cannot see but that we believe makes up more than 20% of the universe C.

Consider the following reaction: NO (g) + SO 3 (g) ⇌ NO 2 (g) + SO 2 (g) A reaction mixture initially contains 0.86 atm NO and 0.86 atm SO 3. Determine the equilibrium pressure of NO 2 if K p for the reaction at this temperature is 0.0118. 0.

An element is a substance that cannot be broken down chemically into A. electrons. B. another substance. C. atoms. D. protons

What is the mass of 1.25 moles of Na2O?

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.