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frez [133]
3 years ago
8

A _ is a device that allows a car to use hydrogen gas to operate.

Chemistry
2 answers:
Tema [17]3 years ago
7 0

Answer:

B

Explanation:

i dont rlly know it just seems right yk

larisa [96]3 years ago
3 0

Answer:

the answer is b. fuel cell......

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K2CrO4 is added to a solution containing lead (II) and barium ions. If a precipitate is formed, what is it?
Step2247 [10]

Answer:

Lead (II) Chromate and Barium Chromate

Explanation:

5 0
2 years ago
Food contains chemical potential energy that the body uses. How do you think that the body gains this energy
defon
By digesting the food
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3 years ago
7.02 x 10^23 molecules of X2, a ssubstance consisting of diatomic molecules, has a mass of 296 grams. Determine the atomic weigh
Fiesta28 [93]

Answer:

d. 127 g/mol.

Explanation:

Hello!

In this case, since we have the amount of molecules of this this compound, we are able to compute the moles out there by using the Avogadro's number:

mol=7.02x10^{23}molec*\frac{1mol}{6.022x10^{23}molec}=1.17mol

Which correspond to the moles of X2. Then, by using the mass we are able to compute the molar mass of X2:

MM=\frac{296g}{1.17mol}\\\\MM=254g/mol

It means that the atomic mass of X halves the molar mass of X2, which is then d. 127 g/mol.

Best regards!

4 0
2 years ago
Which option is an example of physical change?
Murljashka [212]

Answer:

They are all physical exept c

Explanation:

8 0
3 years ago
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Uranium-267 undergoes alpha decay, what is the mass of the new element?
Firlakuza [10]

Answer:

will this help ?

Explanation:

(108Hs) is a synthetic element, and thus a standard atomic weight cannot be given. Like all synthetic elements, it has no stable isotopes. The first isotope to be synthesized was 265Hs in 1984. There are 12 known isotopes from 263Hs to 277Hs and 1–4 isomers. The most stable isotope of hassium cannot be determined based on existing data due to uncertainty that arises from the low number of measurements. The confidence interval of half-life of 269Hs corresponding to one standard deviation (the interval is ~68.3% likely to contain the actual value) is 16 ± 6 seconds, whereas that of 270Hs is 9 ± 4 seconds. It is also possible that 277mHs is more stable than both of these, with its half-life likely being 110 ± 70 seconds, but only one event of decay of this isotope has been registered as of 2016.[1][2].

3 0
2 years ago
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