I think the correct answer from the choices listed above is option A. <span>Glass is mostly made of silica, which is found in sand. If lead is added to silica to make a crystal vase, the lead is known as the solute since it is only added in small amounts compare to silica. </span>
Physical change means - a change from one state ( solid,liquid or gas) to another state without change in chemical composition.
True.
A catalyst is a substancr that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.
Answer: 1×10^11
Explanation:
<u>concept to know:</u> scientific notation must be written in the form of a × 10^b
where 0<a<10.
100 billion= 100,000,000,000
there are 11 zeros after 1
1 × 10^11
Hope this helps!! :)
Answer:
Phosphorus, Sulfur, and Selenium are the only <u>poly</u>atomic elements.
Hydrogen, Nitrogen, Oxygen, Fluorine, Chlorine, Bromine, and Iodide are all <u>di</u>atomic elements.