When heat, light, or sound is given off or absorbed, is it a chemical change, chemical property, physical change, or physical property?

What does temperature measure? the amount of matter the number of calories the number of atoms the amount of heat energy?

A base has a molarity of 1.5M w. R. T the hydroxyl ion concentration. If 7.35 cm3 of this base is taken and diluted to 147 cm3, then what is the concentration of the hydroxyl ion.

How many Lewis dot structures does nitrogen have

In a chemical reaction, the products are? A. the new substances that are formed during the reaction. B. the substances that are broken apart or combined in the reaction. C. all of the chemical formulas that are used during the reaction. D.

Is there a difference between the freezing temperature and the melting temperature? Explain your answer in terms of numerical values, physical change and energy changes

Which subatomic particles are paired with their charges? 1. electron-positive, neutron-negative, proton-neutral 2. electron-negative, neutron-neutral, proton-positive 3. electron-negative, neutron-positive, proton-neutral 4.

Where do you think information is coded in a DNA molecule?

The mole fraction of carbon dioxide in a gas mixture is. 200 there are also. 251 g of nitrogen and. 322 g of oxygen in this gas mixture what is the mass of arbon dioxide in this mixture

How do you do empirical formula

Classify the same processes as exothermic or endothermic. Evaporation of alcohol from skin: liquid C3H30 + 5.