Comment
I'm going to use rounded numbers to calculate the molar mass of water.
Water Molar Mass
- 2H = 2 * 1 = 2
- 1O = 1 * 16 = 16
- Molar Mass = 18 grams / mole
Moles of water
- given mass = 9.176 grams
- Molar Mass = 18 grams / mole
- moles = ??
Formula
moles = given mass / molar mass
moles = 9.176 / 18
moles 0.5098 Answer
Answer:Metals are an excellent conductor of electricity and heat because the atoms in the metals form a matrix through which outer electrons can move freely. Instead of orbiting their respective atoms, they form a sea of electrons that surround the positive nuclei of the interacting metal ions.
Explanation:
The most important variable to control in this experiment the type of bicycle tyre.
<h3>What is an experiment?</h3>
An experiment is a test under controlled conditions made to either demonstrate a known truth, examine the validity of a hypothesis, or determine the efficacy of something previously untried.
According to this question, Dan and Dawn wants to know if there is any difference between the mileage expected from bicycle tires from two different manufacturers.
Dan, then, conduct an experiment by putting one brand on his bike and Dawn will put the other brand on her bike.
In this experiment, the independent variable is the different mileage from different manufacturers. This means that to make this experiment a controlled one, all other variables must be kept constant.
Therefore, the most important variable to control in this experiment the type of bicycle tyre because Dan and Dawn must ensure that they use the same type of bicycle tyre.
Learn more about experiments at: brainly.com/question/11256472
#SPJ1
Answer: Yes, they have.
Explanation: The frequency, severity, and length of heat waves are increasing. Heat and humidity already kill an average of 1,300 people in the U.S. each year. Deadly heat waves of at least 20 days affect 30% of the earth's population. That will increase to 75% by 2100 if global warming isn't stopped.
Answer:
20
Explanation:
The atomic number is equal to the amount of protons in the atomic nucleus.