A student sees a change in mass in the lab when mixing two chemicals what is a possible explanation?

Isotopes of elements have different:

When is there no solution to a compound inequality?

The heat of fusion of a substance is the energy measured during a 1. phase change 2. temperature change 3. chemical change 4. pressure change

10. What is the specific heat of an unknown substance if a 2.50 g sample releases 12 calories as its temperature changes from 25°C to 20°C?

Anhydrous sodium sulfate, Na2SO4, absorbs water vapor and is converted to the decahydrate, Na2SO4⋅10H2O. How much would the mass of 24.40 g of anhydrous Na 2 SO 4 increase if converted completely to the decahydrate?

Where might you find a temperature of 2 kelvin? a. north poleb. the equatorc. earth's cored. the coldest regions of outer space

A blank is a coil of wire that produces a magnetic field when it carries an electric current

What is the change in heat energy when 132g of copper at 32.2°C is raised to 45.0oC? The specific heat of copper is 0.385 J/g °C.

Polar covalent bonds are formed when the electrons in the bond are not shared equally between the two nuclei. which one of these molecules contains polar bonds?

The flame from my candle gives off black smoke heat and light what type of changes do these indicate