Which chemical equation is unbalanced?

O C + O2 → CO2

O Sr + O2 → 2Sro

6H2 + 302 - > 6H20

O H2 + H2 + O2 → H2O + H2O

You are given solutions of hcl and naoh and must determine their concentrations. you use 27.5 ml of naoh to titrate 100.0 ml of hcl and 18.4 ml of naoh to titrate 50.0 ml of 0.0782 m h2so4.

If an instrument has 10 ml td + / - 0.01 ml written on it, the user should ... question 5 options: record 10 ml in the notebook after using it. record 10.0 ml in the notebook after using it. record 10.00 ml in the notebook after using it. record 5.

A chemical reaction that has the general formula of nA> (A) n is best classified as a? Reaction

Which response accurately describes a balanced force? Question 7 options: A 25-N force acts on the left side of the marble at the same time as a 25-N force acts on the right side of the marble.

What are the common uses of acetone and formalin?

Which consequence of new fishing methods had the most immediate impact on the environment? A. Diesel engines on newer ships contributed to global warming B. Increased reliance on fish in the American diet led to health problems C.

Which statement best describes the basis of the band theory of metallic bonding? a. Molecular orbitals overlap to form atomic orbitals in which the valence electrons of the atoms travel. b.

Which of the following is always valid? Choose only ONE answer. 1. W = - P ∫ dV, for the calculation of work in a mechanically-reversible piston-cylinder arrangement 2. For any fluid undergoing a change in pressure, Cp = dH/dT. 3. ΔH = ΔU + Δ (PV) 4.

Are kilograms heavy?

What is the molarity of a solution containing 55.8 g of MgCl2 dissolved in 1 L of solution?