1.) A cleaning solution has 1/100,000 of the hydrogen ion concentration of water. What is its pH rating?

1) 4
2) 5
3) 6
4) 7

Avariable that is not being directly tested during an experiment should be changed varied experimented controlled

Many pharmaceutical drugs are organic compounds that were originally synthesized in the laboratory. which two scientific disciplines are bridged by pharmaceutical drugs? chemistry and forensics chemistry and medicine biology and forensics biology and criminology

If e is the symbol for an element, which two of the following symbols represent isotopes of the same element? 1. e2. e3. ea.1 and 2c.1 and 4b.3 and 4d.2 and 3