What type of star has an absolute brightness of 1 and a surface temperature around 7,500 ∞C

Supergiant

Giant

Main sequence

Dwarf

Phosphorus trichloride, PCl₃ is a liquid at room temperature. Explain this observation in terms of the particles, structure and bonding of PCl₃.

How are elements identified in terms of their atoms

What are two ways life would be different if Earth did not have the motion of revolution

Which of the alkynes below, after undergoing an acid-catalyzed hydration, would be expected to produce two different ketones in nearly equivalent yields? 4-methyl-1-pentyne 1-hexyne 3-methyl-1-pentyne 3-hexyne 2-hexyne?

What elements are basic to all living things?

How much heat (energy) would need to be absorbed by 1.5 g of liquid water to cause a temperature change of 30.45 °C? The specific heat of water is 4.18 J/gºC.

What happens when electrons are passed from one atom to a more electronegative atom?

Calculate the k sp for zinc hydroxide if the solubility of zn (oh) 2 in pure water is 2.1 * 10-4 g/l. calculate the k sp for zinc hydroxide if the solubility of zn (oh) 2 in pure water is 2.1 * 10-4 g/l. 2.9 * 10-3 1.5 * 10-3 9.9 * 10-18 3.8 * 10-17

What is the importance of the coefficients in a balanced chemical reaction?

The process that changes the identity and number of protons in a nucleus is