Which of the following measurements is expressed in three significant figures?

A. 420 mL of hydrochloric acid

B. 0.003 g of vitamin D

C. 622.00 kg of sulfur

D. 0.201 L of nitrogen gas

The glycogen debranching enzyme is required for the transfer of 3-glucose units from one branch to another. the transfer of phosphate from one position to another. cleaving alpha (1 to 6) sugar linkages A and C A, B and C

Given a formula of a functional group: An organic compound that has this functional group is classified as

In the reaction, Zn (s) + 2HCl (aq) → ZnCl2 (aq) + H2 (g), which reactant is a solid? Zn HCl ZnCl2 H2

Formula A: CH3 Formula B: C2H6 Given the two formulas representing the same compound: Which statement describes these formulas? (1) Formulas A and B are both empirical. (2) Formulas A nd B are both molecular.

What is the average salt content

A gas has a volume of 30 L at 105 kPa. What pressure is required to compress the gas to 21 L?

Using special equipment which layer of the sun atmosphere is visible during a total solar eclipse

The characteristic flame test colors of metal ions are due to atomic emission spectra. Duscuss the relationship between the absoption and emission of light and the factors responsible for flame test colors.

Should a bartender use ice and scoop directly from ice machine or use an ice holding device and scoop to make drinks and refill drinks from

What classification should this reaction have? 4Al + 3O2 → 2Al2O3