Which of the following galaxy types is usually made of mostly older stars? a. spiral b. elliptical c. irregular d. ring

Select all the correct answers. which compounds have the empirical formula ch20? (multiple answers)a. c2h4o2b. c3h603c. ch2o2d. c5h1005e. c6h1206

Citric acid has a ph between 1 and 3.  it is considered to be aa. weak acidb. weak basec. strong based. strong acid

Rays from the sun are not considered matter true or false