Which group 4a element is a metalloid?

tin, silicon, lead, carbon

57.9 grams of gold has volume of 3 cubic centimeters what is the density

Calculate the number of grams of oxygen required to convert 23.0 grams of glucose to carbon dioxide to water

Dr. Sinko places an aluminum block and a copper block in contact, and allows them to achieve thermodynamic equilibrium. Aluminum has a higher heat capacity (0.9 J/g) than copper (0.35 J/g).

Do respiration in cells releases energy or absorbs energy

N2 (g) + 3H2 (g) - > 2NH3 (g) How many grams of N2 are required to produce 100.0 L of NH3 at STP a. 6.25 g b. 12.5 g c. 62.5 g d. 125.0 g

What is the mass, volume, density, and substance for Block C:

Which factors affect electronegativity? A. Number of electrons and atomic radius B. Number of unshielded electrons and density of the element C. Atomic radius and number of unshielded protons D. Density of the element and atomic radius

What is the difference between an amide and an amine? And what is a substituted amide?

Balance the following chemical equation: / text{CH}_ 4 + CH 4 + start text, C, H, end text, start subscript, 4, end subscript, plus / text{O}_ 2 / rightarrow 2 →start text, O, end text, start subscript, 2, end subscript, right arrow / text{CO}_2 +

How did the invention of the spectroscope in 1859 change the science of chemistry