A neutral atom of beryllium (Be) has an average mass of 9 amu and 4 electrons. How many neutrons does it have?

13

9

5

4

How many molecules are contained in. 900 mol O2?

Based on your observations of 1-tetradecanol when it reformed a solid after melting, does 1-tetradecanol form a crystalline or amorphous solid? Explain the difference between these two terms as part of your answer.

How many protons does a 17CI have

Which best explains why a bacterial cell is classified as a prokaryote? A.) the presence of a nucleus B.) the absence of a nucleus C.) the presence of a cell wall D.) the absence of a cell wall

If the chemical X-gal is added to nutrient agar, lactose fermenting colonies turn blue, while non-fermenting colonies appear white. What sort of medium is X-gal agar?

Explain the processes of convergence and divergence

How do the electrons in bonds (bonding domains) differ from lone pairs (non-bonding domains) ?

Сколько граммов соли образуется, если в раствор, содержащий 9,8 г серной кислоты, добавим другой раствор, имеющего 10 г гидроксида натрия?

Why do scientific theories change?

How many atoms are present in 34.69 moles of Mg