Is the part of an experiment that is not being tested and is used for comparison

What is the meaning of 1s2 electron configuration (tell what 1 means, the s means and the superscript of 2 means) ?

Dustin is mixing concrete. A formula for concrete calls for 3/8 gal of water. Dustin wants to make 7/9 more concrete than the formula creates. How much water should Dustin use? Simplify your answer.

What makes carbon monoxide

Given four substances NaCl, ethylene glycol, alcohol, and liquid soap each dissolved in water to yield dilute aqueous solutions. Which one of these solutions would you expect to form a colloid?

Read the given equation. Na2O2 + CO2 → Na2CO3 + O2 What volume of O2 gas is produced from 2.80 liters of CO2 at STP?

Does an oxygen atom form two covalent bonds?

In CCl4 is there a certain length that the main atom Carbon is a certain distance from the Chlorine's?

A mechanic repaired 28 cars and 46 trucks last month. He spent 2.5 hours repairing each of these vehicles. Which equation can be used to find h, the total number of hours the mechanic spent repairing these vehicles?

When sulfur forms an ion, it loses two neutrons loses two protons gains two electrons all of these

Which element will attract electrons more strongly-fluorine or carbon?