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Alex777 [14]
3 years ago
6

An example of two class b fuels would be

Chemistry
1 answer:
Viefleur [7K]3 years ago
6 0
Flammable liquid,gasoline, oil, and etc
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What is the energy in joules of a mole of photons associated with visible light of wavelength 486 nm?
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A. 246 kJ is the answer.
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2 years ago
Select the correct answer.
VLD [36.1K]

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I think it’s c.

Explanation:

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2 years ago
If the complete conversion of 1.383g of XI2 results in the formation of 0.564g of XCl2,what is the atomic mass of the element X
Marina CMI [18]

Answer:

So X has an atomic mass of 55.05 u, and is probably Mn

Explanation:

<u>Step1: </u>Balance the equation

XI2 +Cl2 →  XCl2 + I2

<u>Step2:</u> find the molar mass of the compounds

<em><u>Compounds : </u></em>

X  ⇒ Molar mass = M

XI2 ⇒ Molar mass = M + 2*126.9 u

XCl2 ⇒Molar mass = M + 2*35.45u

⇒For 1 mole XI2 we have 1 mole Cl2 reacting , as well as 1 mole XCl2 and 1 mole I2 produced.

<u>Step 3:</u> Calculating the atomic mass

(1.383g * XI2) / (M + 2*126.90 u)  = (0.564g * XCl2) / ( M + 2 * 35.45u)

1.383 (M + 2 *35.45 u )= 0.564 (M  + 2*126.90)

1.383M + 98.0547 = 0.564 M + 143.1432

1.383 M - 0.564 M =143.1432 - 98.0547

0.819 M = 45.0885

M = 55.05 u

So X has an atomic mass of 55.05 u ⇒ if we look at the periodic table we can find that the closest element is Manganese (Mn)

MnI2 + Cl2 → MnCl2 + I2

5 0
2 years ago
Compared to the charge of a proton, the charge of all electron has
Kay [80]
<span>Answer: option (4) the same magnitude and the opposite sign.
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Justification:
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</span><span>1) Electrons are negative particles thar are around the nucleus of the atom (in regions called orbitals).
</span>
<span /><span /><span>
2) Protons are positive particles that are inside the nuclus of the atom.
</span><span />

<span>3) The nucleus of the atom has the same number of protons as electrons are in the orbitals of the atom.
</span>
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4) The atoms are neutral (neither positive nor negative) because there are the same number of electrons and protons and their charge are of the same magnitude but different sign: (+) + (-) = 0: positive + negative = neutral.</span>
6 0
2 years ago
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Why is photosynthesis important for ecosystems everywhere
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it allows plants to survive  and continue to  reproduce

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