B. 0.72 mol NaCl
http://www.convertunits.com/from/grams+NaCl/to/moles
False.
The correct homonym to fit the following sentence should be "led".
She LED her friends through the woods.
A homonym is a word that is said or spelled the same way as another word but has a different meaning.
In the above sentence: lead and led are homonyms. Lead is a heavy metal while led means guided.
Other examples homonyms are:
*lays - to recline
laze - to recline with extreme prejudice
leis - several flower necklaces
*made - accomplished
maid - young woman
*manner - method
manor - lord's house
The answer is: 60.
Tobacco products are made up of thousands of chemicals, including at least 60 known to cause cancer (carcinogens).
Some of carcinogens chemicals are: acetaldehyde, arsenic, radioactive elements (for example polonium-210), nitrosamines, nickel, benzene, polycyclic aromatic hydrocarbons, vinyl chloride.
Smoking tobacco causes at least 15 different types of cancer. For example: mouth, pharynx, larynx, oesophagus, liver, pancreas, stomach, kidney cancer.
1 Na = 23 g/mol
1 mole of Na atom contain an Avogadro Number of atoms .
23g of Na Na atom contain 6.02 * 10²³ atoms.
175 g of Na will contain: 175 * <span>6.02 * 10²³ / 23
</span>
≈ 4.580 * 10²⁴ atoms of Na.