Which of these is an indication that a chemical reaction has occurred?

A.) formation of gas

B.) Boiling of a substance

C.) Melting of a substance

D.) freezing of a substance

Resources that cannot be replenished

A syringe contains 56.05 mL of gas at 315.1 K. What volume will that gas occupy if the temperature is increased to 380.5 K? a) 12.41 b) 46.42 c) 67.68 d) 81.74

An element has three naturally occurring isotopes. The relative abundances of the isotopes are 0.27%, 9.25%, and 90.48%. The most abundant isotope has an atomic mass of 19.99 amu. The least abundant isotope has an atomic mass of 20.

How do fats differ from proteins, nucleic acids and polysaccharides?

The introduction of a reflective essay should begin with a. a lead-in sentence. b. a thoughtful question. c. a thesis statement. d. an acknowledgement of the audience.

What values do we plot on the y-axis of a graph

What is the n factor of Ba (MnO4) 2 in acidic medium when it reacts with H2O2?

What organelle is primarily used in respiration

Which of the following planetary objects have the most affect on Earth's tides? sun Mars moon Venus

Ionic compounds are formed by the ... of electrons? by the what?