What does the law of conservation of matter/mass state

You dip a piece of blue litmus paper in a solution of NaOH. What happens to the color of the litmus paper?

Which statements are true regarding redox reactions? (Note that in redox reactions, the molecule that "causes" another to gain or lose electrons is referred to as the agent.) Select all that apply. A. Oxidizing agents accept electrons. B.

a chemist reacts 150.0 grams of HCl with an excess of MnO2. if the following reaction occurs: MnO2+4HCl=MnCl2+2H2O+Cl2 how many grams of mncl2 are formed

What types of adaptations can be observed in nature?

When metals form ions, they tend to do so by 1. losing electrons and forming positive ions 2. losing electrons and forming negative ions 3. gaining electrons and forming positive ions 4. gaining electrons and forming negative ions?

An aspirin tablet contains 81.0 mg of aspirin, which has the molecular formula, c9h8o4.

If you have 6 moles of CH4 how many moles of H2O can be produced

What is the definition of substance in your own words.

A 1.3 g sample of gold (specific heat capacity = 0.130 J/g °C) is heated using 86.9 J of energy. If the original temperature of the gold is 25.0°C, what is its final temperature?

In what applications might coal replace petroleum based fuel