HRS - Ask. Learn. Share Knowledge. Logo

Questions in chemistry

[Done] Fill in the missing reactant: NaOH + _____ → NaClO₂ + H₂O a. Cl₂ b. HCl c. HClO d. HClO₂ e. HClO₃

[Done] Which category contains elements in the solid, liquid, and gas phases? a. alkali metals b. alkaline earth metals c. transition metals d. halogens e. noble or inert gases

[Done] Iron(III) sulfite has the formula a) Fe₃SO₃ b) Fe₂(SO₄)₃ c) Fe₂(SO₃)₃ d) Fe₂SO₄ e) Fe₂SO₃

[Done] A solution can be both a. Dilute and concentrated b. Saturated and dilute c. Saturated and unsaturated d. Supersaturated and saturated e. None of these

[Done] Which statement regarding significant figures is false? A. Zeros can be significant. B. When multiplying, the answer is determined by the number of significant figures. C. When adding, the answer is determined by the number of decimal places. D. When dividing, the answer is determined by the number of decimal places. E. The number 50,004 has five significant figures.

[Done] What holds solid sodium together? A. Hydrogen bonding B. Metallic bonding C. Ionic bonding D. Dipole forces E. Van der Waals forces (London dispersion forces)

[Done] What mass of sodium chloride is produced when chlorine gas reacts with 0.29 grams of sodium iodide? Note: Ensure to use stoichiometric calculations for the reaction.

[Done] Which of the following solutions would show the greatest conductivity at 30°C? A. 0.20 M Ca(NO₃)₂ B. 0.25 M HCl C. 0.30 M NaOH D. 0.10 M NaCl E. 0.40 M CH₃OH

[Done] Write the balanced equation for the reaction of aqueous Pb(ClO3)2 with aqueous NaI.

[Done] What are five observable properties of matter?