Answer:
4.78 g/cm³
Explanation:
Density is expressed as mass per unit volume:
D = m/V
D = (24.02 g) / (5.02 mL) = 4.78 g/mL
The density should be expressed in g/cm³, so mL must be converted to cm³. The conversion ratio is 1 mL = 1 cm³.
(4.78 g/mL)(1 mL/1 cm³) = 4.78 g/cm³
Answer: C. Light can cause electrons to be released from the surface of a metal
Explanation:
Hey there!
B + O₂ → B₂O₃
Balance O.
2 on the left, 3 on the right. Add a coefficient of 3 in front of O₂ and a coefficient of 2 in front of B₂O₃.
B + 3O₂ → 2B₂O₃
Balance B.
1 on the left, 4 on the right. Add a coefficient of 4 in front of B.
4B + 3O₂ → 2B₂O₃
Our final balanced equation: 4B + 3O₂ → 2B₂O₃
Hope this helps!
Answer:
A cause of the increase of population is global warming. Chemistry helps decrease emissions from cars and helps attempt to create cleaner fuels. The discoveries of these has also contributed to science and technology.
I'm not able to speak or write Spanish fluently my apologies. i gave an idea of how answer and maybe you can elaborate on it.
Hopefully I was helpful!
