Chemistry Questions
Explore questions in the Chemistry category that you can ask Spark.E!
DB.A material safety data sheet (MSDS) for a chemical is shown below. Which of these is the IUPAC name for H3PO4(aq)?
Elements in a group of the periodic table are described below. These elements most likely belong to which group?
The graph below shows a solubility curve for ammonia gas and solubility measurements taken at different temperatures. Between which two points did the ammonia solution change from being unsaturated to saturated?
How many atoms are present in 179.0 g of iridium?
Heart cells require a certain balance of sodium and potassium ions to function. The blood, which is approximately 83% water, carries these two types of ions to the heart. The property of water that allows it to carry ions to the heart is its—
Some students used a variety of procedures to investigate four liquid samples. The students recorded the following information. • When Sample W was cooled, solid particles settled out of the liquid. • The mass and volume of Sample X were measured, and the density of Sample X was calculated to be 1.6 g/mL. • Sample Y was heated, and the temperature was recorded. All the liquid boiled away at the same temperature and left no residue in the container. • When a dilute acid was added to Sample Z, gas bubbles formed and rapidly rose to the surface of the liquid.Based on these observations, which sample was clearly identifiable as a pure substance?
The diagram below shows what happens when zinc reacts with hydrochloric acid. Which of these best describes the energy transformation that occurs during this reaction?
When zinc is exposed to air, zinc oxide is produced. What happens in this reaction?
The diagram below shows a battery giving off a current producing bubbles in two test tubes. Which of the following best shows that the investigation results in a chemical change?
What is the electron configuration for an atom of germanium at ground state?
What is the volume of 2.00 moles of chlorine (Cl2) at STP, to the nearest tenth of a liter?
Which of the following correctly matches a compound with its molecular geometry?
Which of these is the electron-dot diagram for Br2(l)?
Which of these statements is an accurate description of the ionization energies of elements in the periodic table?
Which mixture can be separated through filtration because one of the substances is insoluble in water?
What is the pH of a substance that has a hydrogen ion concentration of 1.2 ×10−2 M?
The table below lists some properties of a sample of lauric acid. Which of these is an intensive property of this sample?
What is the formula of the ion hydrogen sulfite, which has a charge of −1?
A detail from a label on a bottle of a water-softening agent is shown below. Which inference about the contents of the bottle can best be drawn?
_________ s a liquid's resistance to flow.