Write a balanced equation for the combustion of butane. express your answer as a chemical equation. identify all of the phases in your answer.

Discribe how an internal combustion engine works. What is drawback to the type of power?

Which of the following has a fixed shape? A.) feather B.) Milk C.) Carbine dioxide D.) Oxygen

True or False If the answer is true, write "true" on the line. If the answer is false, replace the underlined word or phrase with one that will make the sentence correct.

A beaker with 1.60*102 mL of an acetic acid buffer with a pH of 5.000 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 7.10 mL of a 0.460 M HCl solution to the beaker.

4 On a bright, sunny day, which time of day can be predicted to create the shortest shadows? F 9:00 A. M. H 3:00 P. M. G 12:00 P. M. J 12:00 A. M.

Which structures are found on sponges? pores medusae polyps stinging cells

Coefficients in a chemical equation are used to: balance the number of atoms on both sides of the equation ensure that all subscripts on both sides of the equation are the same indicate energy changes that occur during the reaction indicate the type

What determines your blood cholesterol level?

Describe two ways that water moves through earthy atmosphere in the water cycle.

which of the following questions can use science as a method of inquiry? a. is cloning appropriate b. how can we protect crops from drought c. why is jazz a great type of music d. did dinosaurs exist