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Year 11 facts to know

Posljednje ažuriranje over 1 year ago

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Pitanje 1

1.

Which of the following is the approximate size of a nucleus? (1 Point)

2 × 10^-15 m

0.1 nm

1.0-100 nm

0.1 mm

Pitanje 2

2.

Which of the following is the approximate size of a nanoparticle? (1 Point)

2 × 10^-15 m

0.1 nm

1.0-100 nm

0.1 mm

Pitanje 3

3.

Which of the following is the approximate size of an atom? (1 Point)

2 × 10-15 m

0.1 nm

1.0-100 nm

0.1 mm

Pitanje 4

4.

How many moles of carbon are there in 12g of carbon? (1 Point)

0.1

1

6.02 x 10²³

12

Pitanje 5

5.

How many carbon atoms are there in 12g of carbon?

0.1

6.02 x 10²³

12

1

Pitanje 6

6.

How many carbon atoms are there in 22g of carbon dioxide?

0.1

3.01 x 10²³

6.02 x 10²³

12

Pitanje 7

7.

If a hydrocarbon has a molecular mass of 42 and an empirical formula of CH₂, what is the molecular formula of the compound?

CH₂

C₂H₄

C₃H₆

C₄H₈