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stiks02 [169]
3 years ago
8

The rust that appears on steel surfaces is iron(III) oxide. If the rust found spread over the surfaces of a steel car body conta

ins a total of 1.188×1023 oxygen atoms, how many grams of rust are present on the car body?
Chemistry
1 answer:
alexira [117]3 years ago
7 0

OMG WRONG THING SOOO SOO SORRYY i mean to put this answer on something else

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Which of the following would increase the strength of an electromagnet? Check all that apply.
TiliK225 [7]

Answer: The correct statements are ; A and B.

Explanation:

The strength of the magnetic field(B) in an electromagnet can be calculated using formula:

B=\mu\frac{N}{L}I

\mu = Relative permeability

N = number of turns

I = Current in the wire of the solenoid

L = length of the solenoid or electromagnetic

As we can see from the formula:

B\propto N

B\propto I

So, by increasing the turns and increasing current flowing through wire one can increase the strength of an electromagnet.

Hence, the correct statements are ; A and B.

5 0
3 years ago
Question 1 of 7
nlexa [21]

Answer:

Explanation:B ice melting is a phiyscal change and the mass of the substance remains the same

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1Explain why the ions of sodium, magnesium and aluminium are smaller than their corresponding atoms.
ella [17]

Answer:

I think magniesum is combined with the sulfer which is why its at 3 omegas.

Hope this helps!

Explanation:

3 0
3 years ago
How many molecules of sulfur trioxide are in 78.0 grams?
zalisa [80]

Answer:

b) 5.87 E23 molecules

Explanation:

∴ mm SO3 = 80.066 g/mol

⇒ molecules SO3 = (78.0 g)(mol/80.066 g)(6.022 E23 molec/mol)

⇒ molec SO3 = 5.866 E23 molecules SO3

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A photon has a wavelength of 750 no. What is the energy in joules
zhuklara [117]

Answer:

750

Explanation:

750

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