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WARRIOR [948]
2 years ago
8

I need help ASAP pls

Chemistry
1 answer:
Sergio039 [100]2 years ago
4 0

Answer:

1.40.078 u

2.26.981539 u

3.207.2 u

4.56

5.53.9396147 u

6.1.00784 u

Explanation: your welcome

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dybincka [34]

Answer:

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Explanation:

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3 years ago
Explain what the ecliptic is
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The Ecliptic is an imaginary line on the sky that marks the annual path of the sun. It is the projection of Earths orbit onto the celestial sphere. The ecliptic is even the starting point for the celestial coordinate system used by astronomers to pinpoint the location of every star, nebula, and galaxy.
7 0
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Is the cell thoeory a law
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4 0
3 years ago
How many moles of hydrogen atoms are there in 1.25 x 1025 molecules of ethane? (C2H6)
krek1111 [17]

Answer:

124.56 moles of Hydrogen atoms.

Explanation:

We'll begin by calculating the number of moles of ethane that contains 1.25×10²⁵ molecules. This can be obtained as follow:

From Avogadro's hypothesis, 1 mole of any substance contains 6.02x10²³ molecules. This implies that 1 mole of ethane also contains 6.02x10²³ molecules.

Thus, 6.02x10²³ molecules are present in 1 mole of ethane.

Therefore, 1.25×10²⁵ molecules are present in = 1.25×10²⁵/6.02x10²³ = 20.76

Therefore, 20.76 moles of ethane contains 1.25×10²⁵ molecules.

Finally, we shall determine the number of mole of Hydrogen in 20.76 moles of ethane. This can be obtained as follow:

Ethane has formula as C2H6.

From the formula, 1 mole of ethane, C2H6 contains 6 moles of Hydrogen atoms.

Therefore, 20.76 moles of ethane will contain = 20.76 × 6 = 124.56 moles of Hydrogen atoms.

Therefore, 1.25×10²⁵ molecules of ethane contains 124.56 moles of Hydrogen atoms.

7 0
3 years ago
An atom of sodium -23 has a net charge of +1 identify the number of protons, neutrons, and electrons in the atom. Then explain h
nikitadnepr [17]

Number of protons is 11

Number of neutrons is 12

Number of electrons is 10

For a neutral Na, Sodium atom:

The mass number P+N = 23

Atomic number (E or P) = 11

A charged Na atom that has lost an electron is positively charged and so:  Number of Protons = 11 (Still the same)

Number of neutrons = 12

Number of electrons = 11-1=10 (the atom has lost an electron)

If an atom loses electron, it becomes positively charged ie. P>E

Learn more about Electrons, Protons, Neutrons here:

brainly.com/question/13131235

#SPJ9

6 0
1 year ago
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