You add 7.8 g of iron to 20.70 mL of water and observe that the volume of iron and water together is 21.69 mL. Calculate the density of iron.

Which is a pair of allotropes?

What is a disadvantage of using a structural model to show a chemical compound? Structural models provide minimal three-dimensional information. Structural models do not identify the number and type of each atom.

Predict the products for this reaction CuO + NaNO3 A. Cu (NO3) 2 + Na2O B. CuO4 + NaN C. No reaction D. CuNO3 + NaO

A 0.1 m salt solution has a ph = 7.0 at 25 degrees c. this salt would be which of the following life, rbbr, naclo4, nh4cl

Is sodium acetate a liquid, solid, or gas?

23 Which term identifies the half-reaction that occurs at the anode of an operating electrochemical cell? (1) oxidation (3) neutralization (2) reduction (4) transmutation

Which of the following is true? A) Gas atoms subjected to electricity emit bright lines of light. B) Gas atoms absorb white and emit a continuous spectrum of light. C) Gas atoms under high pressure emit dark lines against a continuous spectrum.

What common household element can, over time, reduce airflow, insulate components, reduce heat exchange or even cause the system to hang or reboot?

Clouds that form at an elevation of 3 kilometers will most likely be composed of A) raindrops B) ozone C) ice crystals D) sleet

Describe how glacial erosion influenced the topography of Ohio.