The one that is observed or measured in the experiment, and it is known as the dependent variable.
Answer:
Mean
Explanation:
The mean of a series of measurements is calculated when a<em>ll the measurements are added up and then divided by the number of measurements taken</em>, as follows:
- Sum of Measurements = 20.73 + 20.76 + 20.68 + 20.75 = 82.92
As<u> there are 4 measurements</u>, the mean is:
<span>Sedimentary rocks are formed when sediment is deposited out of air, ice, wind, gravity, or water flows carrying the particles in suspension. This sediment is often formed when weathering and erosion break down a rock into loose material in a source area.</span>
Choice C. There is one sulfate group in the reactants but two in the products. Also, there are 4 nitrate groups in the reactants but only two in the products.
Answer: Option (a) is the correct statement.
Explanation:
A substance that has two or more number of different atoms which are chemically combined to each other in a fixed ratio by mass is known as a compound.
For example, 
Here,
contains one atom of calcium and two atoms of chlorine which are chemically combined together in 1:2 ratio. Therefore, it is a compound.
Also, both chemical and physical properties of
will be different from Ca and
.
Thus, we can conclude that the statement atoms are bonded together, and the compound has different physical and chemical properties than the individual element, is correct.