Which of these is used to find the estimated age range of a fossil?

A.) Absolute dating

B.) Half-life

C.) Index fossils

D.) Radioactive dating

Student follow up The ionic equation for the reaction between zinc and sulfuric acid is. Zn (s) + 2H (aq) - - Zn" (aq) + H2 (g) a State what has been oxidised in this reaction. Explain your answer in terms of electrons.

Wet air has a total pressure of 765.0 mm Hg at 25 degrees C. The partial pressure of the water vapor is A mm Hg and the partial pressure of the dry air is ^ mm Hg.

Oxalic acid reacts with sodium hydroxide according to the following equation: H2C2O4 + 2 NaOH → Na2C20. + 2 H20 A 25.00 mL sample of the H2C2O solution required 19.62 mL of 0.341 M NaOH for neutralization. Calculate the molarity of the acid.

If 27.3 mL of 0.293 M HBr solution completely neutralizes 42.6 mL of NH3, what is the concentration of the NH3 solution? NH3 + HBr yields NH4Br 0.188 M 0.387 M 0.586 M 2.18 M

Which of the following rules would apply to the naming of AgNO3? A. Metal + polyatomic anion B. Metal cation + nonmetal anion (-ide) C. Metal cation + (roman numeral valence) + nonmetal anion (-ide) D. Polyatomic cation + nonmetal anion (-ide)

Which of these is a covalent compound? 1. AICI3 2. CO 3. MgO 4. LiCI

What is a protein used for

Atoms of the halogen family typically steal two electrons from other atoms when they react true or false

Looking at the periodic table, which group consists of elements that will not form an acid when combine with hydrogen? A) radon, neon, calcium B) neon, bromine, barium C) beryllium, iodine, krypton D) lithium, potassium, fluorine

Mixtures have (exact, relative) amounts of the same substances