Answer: <span>Fuel cells do not need an extra or rechargeable battery to operate the electronics.
Explanation:
The fuel cells are the batteries pe se. The cars do not need an extra battery and the batteries are not rechargeable.
The cells produce the electric power from the combination of hydrogen and oxygen.
</span>Regarding the other choices, fuel cells use hydrogen gas which needs high pressure, resulting in requiring <span>heavy steel tanks and isolation.
Of course the hydrogen gas is not as wideley distributed
throughout the country as conventional fuel.
And the tecnology is yet expensive.</span>
Answer:
Number of atoms = 5.1345 x 10²³
Explanation:
Given:
Mass of sodium = 19.6
Find:
Number of atoms
Computation:
We know that atomic mass of sodium is 22.98
So,
Number of atoms = [Mass of sodium/atomic mass of sodium]Avogadro's number
Number of atoms = [19.6 / 22.98]6.02 x 10²³
Number of atoms = 5.1345 x 10²³
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Answer:
The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles K2SO4, or 174.2592 grams.
Explanation:
Isn't that a substitution reaction? Sorry if i am wrong haven't taken these in a while
The answer would be B
Explanation: There is more Newton force pushing it and since it's on a flat surface it moves more than a higher kg weight block.