1. Nitrogen dioxide is a gas that can be generated by emissions from vehicles and
Factories. It can also be generated by natural
sources, such as forest fires, lightning, and
microbial activity in soil. The equation for
producing nitrogen dioxide is shown below.
The total number of
atoms remains
unchanged.
+
2NO
Colorless
gas
Colorless
gas
+ 2NO,
Brown
gas
The state of matter
remains the same.
E
Which of these provides evidence that a
chemical reaction occurs?
A gas is present.
CLEAR ALL

The following reaction shows the products when sulfuric acid and aluminum hydroxide react. al(oh)3 + h2so4 → al2(so4)3 + h2o the table shows the calculated amounts of reactants and products when the reaction was conducted in a laboratory. initial mass and yield sulfuric acid aluminum hydroxide initial amount of reactant 40 g 15 g theoretical yield of water from reactant 14.69 g 10.38 g what is the approximate amount of the leftover reactant? 11.73 g of sulfuric acid 10.33 g of sulfuric acid 11.12 g of aluminum hydroxide 13.67 g of aluminum hydroxide

Determine the wavelength of the light absorbed when an electron in a hydrogen atom makes a transition from an orbital in the n=3 level to an orbital in the n=7 level.

What are transitions between a liquid and gas called? identify which way they are transitioning