A sedimentary rock that shows ripple marks was found.

Write the chemical formula for a compound that is made of an element from group 1 and an element from group 17

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?

Acm ruler with main graduations from 1 to 10 from left to right there are 10 secondary graduations between each of the main graduations there is a line that begins. at the left end of the ruler 10 secondary graduations to the left of the “1 main graduation the right end of the line ends on the eighth secondary graduation to the right of 3 how long is the line