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

precipitate forms

temperature remains the same

color is diluted

mass increases

What would happen to a vacant lot in your community if it were to left alone for the next 25 years

How many atoms are present in 9 molecules of NH4CN?

Methane is also known as natural gas, and its combustion is a very common reaction: CH4 + 2 O2 → CO2 + 2 H2O. Remember that we can use stoichiometry if we know the correct coefficients.

How many grams of vanadium would contain the same number of atoms as 58.693 g of nickel

The reaction, C2H6) (l) + 3) 2 (g) produces 2CO2 (g) + 3H2) (g), is the combustion of ethanol. What occurs as the reaction proceeds.

The data below were collected for the following reaction at 500 ∘C: CH3CN (g) →CH3NC (g) Time (h) [CH3CN] (M) 0.0 1.000 5.0 0.794 10.0 0.631 15.0 0.501 20.0 0.398 25.0 0.

How do i convert 3.00 moles H2 to molecules?

How can you use the chemical formulas for sucrose (C6H, 20,) and rust (Fe, O,) to classity them ionic or molecular compounds?

What is true of energy as is passes through an ecosystem? a. All of the energy in an organism is used by the animal that eats it. b. Any stored energy in an organism is used by the animal that eats it. c.

Which can associate a suspect and the firing of a gun? (its not b) A) markings on the gun's exterior B) markings on the casing C) markings on the bullet D) powder residues