A change in the properties of matter where chemical bonds are broken and new bonds are formed is

a.) a chemical change

b.) a physical change

c.) an ionic change

d.) a covalent change

What substance is used in a nuclear reactor to absorb heat released from the reactor?

In pea plants, tall (T) plants are dominant over short (t) plants. Suppose a pea plant with the genotype TT is crossed with a pea plant with the genotype tt. The resulting offspring should all be tall (Tt). What does this example demonstrate?

How many atoms of ^6Li are there in 12.3 g of ^6Li?

What is the weight of a 75 kg. Mass?

How many atoms of mercury are present in 3.2 cubic centimeters of liquid mercury? the density of mercury is 13.55 g/cc. answer in units of atoms?

If 294 grams of FeS2 is allowed ti react with 176 grams of O2 according to the following equation how many grams of Fe2O3 are produced? FeS2 + O2 = Fe2O3 + SO2

Convert 3.57 moles of aluminum to grams

An average microwave uses a frequency of 2.54 GHz. How much energy is emitted?

Why scientist form a hypothesis

Step two of the procedure states: "Using sterile technique, place a loopful of inoculum from the M. luteus culture in the drop of nigrosin and mix." Which of the procedures qualifies as sterile technique?