Answer : The mass of needed are, 44.5 grams.
Explanation :
First we have to calculate the moles of Na.
Now we have to calculate the moles of NaCl.
The balanced chemical reaction is:
From the reaction, we conclude that
As, 2 mole of produces from 2 mole of
So, 0.761 mole of produces from 0.761 mole of
Now we have to calculate the mass of
Molar mass of = 58.5 g/mole
Therefore, the mass of needed are, 44.5 grams.
If a snail crawls at a rate of 228.16cm/s, Its speed in miles per hour will 5.10 miles/hour
<h3>
What is speed ?</h3>
The rate at which someone or something moves or operates or is able to move or operate.
Snail covers distance in 1 seconds = 228.16 cm
It covers in 60 seconds (1 min) = 228.16 cm x 60 = 6mtrs
It covers in 60 minutes (1 hour) = 228.16 cm x 60 x 60 = 821376 cm
Now, lets convert cm to miles :
As, 1 cm = 6.21371 x 10⁻⁶ miles
Thus, 821376 cm = 5.10 miles
hence, If a snail crawls at a rate of 228.16cm/s, Its speed in miles per hour will 5.10 miles/hour
Learn more about speed here :
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Answer:
change temperature at different rates
Even in pitchblende, polonium is exceedingly rare: 1,000 tons of ore must be treated to yield 40 milligrams of polonium. It has a one-part-in-ten-thousandth-thousandth-thousandth-thousandth-thousandth-thousandth It is found in nature as a byproduct of the radioactive decay of uranium, thorium, and actinium.
Atomic Number: 210
Answer:
Hydrogen Peroxide
Explanation:
Hydrogen peroxide is a chemical compound with the formula H₂O₂. In its pure form, it is a very pale blue, clear liquid, slightly more viscous than water. Hydrogen peroxide is the simplest peroxide. It is used as an oxidizer, bleaching agent, and antiseptic. Concentrated hydrogen peroxide, or "high-test peroxide", is a reactive oxygen species and has been used as a propellant in rocketry. Its chemistry is dominated by the nature of its unstable peroxide bond.