What are three of Leonardo divinci's contributions to science?

The following equation describes how sodium and chlorine react to produce sodium chlorine

A 1.0-l buffer solution initially contains 0.30 mol of nh3 and 0.30 mol of nh4cl what mass of the correct reagent should you add?

You are investigating an organic compound. You discover that it is an aromatic compound often used as flavoring. What type of compound is it likely to be?

Give the charge and full ground-state electron configuration of the monatomic ion most likely to be formed by each element. p a. p3â: 1s22s22p63s23p3 b. p4â: 1s22s22p63s1 c. p3â: 1s22s22p63s23p6 d. p4â: 1s22s22p63s23p64s1 e. none of these

This is how manganese appears in the periodic table

The dihydrogenphosphate ion, H2PO4 - is amphiprotic. In which of the following reactions is this ion serving as a base?

What is the reactant (s) of the reaction below? MgCO3 (s) → MgO (s) + CO2 (g) O A. Magnesium oxide and carbonate O B. Magnesium carbonate O O C. Magnesium and carbon dioxide D. Magnesium oxide

Temperatures in June in the Paradise City are distributed nearly normally with mean 82 degrees and standard deviation 6 degrees F. Which of the following temperatures would be considered unusual? A. 89.2 B. 75.4 C. 79 D. 86.2 E. 95.8

Which feature do all adult echinoderms have?

A scientist observed a 5-mL sample of an unknown substance. It is a blue liquid with a density of 1.2 g/cm. the substance reacts with carbon dioxide.