Chemistry in Daily Life Questions and Answers

A reaction produces 7.64mol of oxygen gas. If the pressure in the room is 1.25atm and the temperature if 208.13°C, what volume of oxygen gas was produced in liters? Reaction: 6CO2(g) + 6H2O(g)--> C6H12O6(1)+902(g)

How many moles of sulfur dichloride are present in 7.74 x 1022 molecules of this compound?

Draw orbital sketches and build the models for: a) Ethene/ethylene (C₂H4). Each carbon in ethene has 3 regions (gray pieces, sp2) this molecule is trigonal planar, the 3D structure is done with solid lines, all in the same plane) b) Ethyne/acethylene (C₂H₂). There is only one triple bond (gray) with regions above and below the internudtear axis. The piece already represents the two carbons of the triple bond, just add the two hydrogens (white spheres). The piece without H represents 4 carbons. The angles around each carbon are 180⁰.

Many elements combine with hydrogen(valence = 1) to give compounds called hydrides. Use the position of an element in the periodic table to deduce its valence. Write formulas for these hydrides without using subscripts, for example XH3. If no hydride forms, write "none". What is the formula of the hydride formed by neon? What is the formula of the hydride formed by barium?

The compound barium nitrite is a strong electrolyte. Write the reaction when solid barium nitrite is put into water.

Inorganic compounds do not contain a carbon-carbon bond. Two types of intramolecular bonds can exist in different inorganic carbon compounds. These are lonic and metallic bonds lonic and hydrogen bonds Covalent and hydrogen bonds Covalent and ionic bonds

Mrs. McCormick has acute psychosis and is being treated with chlorpromazine hydrochloride (Thorazine) 15 mg four times per day. What is her total daily dose of Thorazine (in mg)?

Which of the following is NOT true about the history of drug discovery? All early effective medicines were plant derived because plants were the only sources of small organic molecules. Quinine was used by the Romans as an antimalarial compound, the modern analog of which is chloroquine. The first drugs developed were rationally designed based on knowledge of the target. Sulfa drugs are still used clinically today.

A penny has a mass of 0.0027 kilograms and a volume of 0.53 milliliters. Set up the problem below and calculate the density of the penny in grams/milliliter. 0.0027 kg 0.53 mL g/mL Based on your calculation, will the penny float or sink in water? O

An ion from a given element has 25 protons and 23 electrons. What is the charge on the ion? Use the References to access important values if needed for this question. What is the name of the element? What is the symbol for the ion?

Ammonium formate NH4HCO₂, contains both ionic and covalent bonds. Draw the Lewis structure of this compound.

What is the difference between mass number and atomic mass? Atomic mass is the mass of an atom. When the mass is expressed in u, the mass of a proton and of a neutron are both relatively small. Because the mass of an electron is one, the mass number approximates the atomic mass. O Atomic mass is the mass of an atom. When the mass is expressed in u, the mass of a proton and of a neutron are both approximately one. Because the mass of an electron is also one, the mass number approximates the atomic mass. O Atomic mass is the mass of an atom. When the mass is expressed in u, the mass of a proton and of a neutron are both approximately one. Because the mass of an electron is small relative to that of a proton or neutron, the mass exactly equals the atomic mass. O Atomic mass is the mass of an atom. When the mass is expressed in u, the mass of a proton and of a neutron are both approximately one. Because the mass of an electron is small relative to that of a proton or neutron, the mass number approximates the atomic mass.

A gold atom has a radius of 145 pm. If you could string gold atoms like beads on a thread, how many atoms would you need to have a necklace 40. cm long?

Based only on intermolecular forces, which of the following would be the least soluble in CH3OH? A) CH3CH2CH₂CH3 B) H₂O C) CH3CH₂OCH₂CH3 D) CH3CH₂OH

What drives the process of plate tectonics, the currently accepted explanation for the movement of drifting continents? A. gravity B. ocean currents C. convection in the mantle D. earthquakes

Which of the following describes the octet rule? A. Atoms tend to gain or lose electrons to have 8 electrons at their outermost energy level. B. The first 8 electrons closest to the nucleus have the highest energy and participate in bonding. C. Atoms that have fewer than 8 electrons can only gain electrons. They cannot lose any. D. Up to 8 electrons can be part of a chemical bond.

Fe2O3 (molar mass = 159.7 g/mol) reacts with CO (molar mass= 28.0 g/mol) according to the equation Fe₂O3(s) + 3CO(g) → 3CO₂(g) + 2Fe(s) When 210.2 g Fe2O3 reacts with excess CO, what number of moles of Fe (iron) is produced? a. 5.265 mol Fe b. none of these c. 2.632 mol Fe d. 0.658 mol Fe e. 3.949 mol Fe

A chemistry student weighs out 0.0411 g of phosphoric acid (H₂PO4), a triprotic acid, into a 250. mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.0600M NaOH solution. Calculate the volume of NaOH Solution the student will need to add to reach the final equivalence point.

According to the Bohr model, the energy of the hydrogen atom is given by the equation: E = (-21.7 x 10-19 J)/n^2 Calculate the wavelength of the photon emitted when the atom undergoes relaxation from the first excited state to the ground state. Selected Answer: a. 9.1 x 10-8 m Correct Answer: d. 1.22 x 10-7 m

What effect do Chlorofluorcarbons (CFCs) have on the earth's ozone? A. CFC's form a chlorine radical that synthesizes the Earth's ozone. B. CFCs form a chlorine radical that decomposes the Earth's ozone. C. CFCs form oxygen gas that is good for the Earth. D. CFCS do not affect Earth's ozone

Why is invert sugar sweeter than sucrose? Invert sugar is sweeter than sucrose because it is a 50-50 mixture of ribose and fructose, and fructose is much sweeter than sucrose. Invert sugar is sweeter than sucrose because it is more soluble than sucrose. Invert sugar is sweeter than sucrose because it is a 50-50 mixture of fructose and glucose, and fructose is much sweeter than sucrose. Invert sugar is sweeter than sucrose because

What is the percent yield of zinc nitrate when 4.02 moles silver nitrate is reacted with excess zinc chloride and 99.0g of zinc nitrate is produced. (Molar Mass of AgNO3 = 169.87g/mol; Molar Mass of Zn(NO3)2 = 189.36g/mol) ZnCl2 + 2AgNO3 → 2AgCl + Zn(NO3)2 28.9% 57.9% 52.0% 26.0%

Classify each scenario according to the empirical gas law it exemplifies. Amonton's law Avogadro's law Answer Bank The pressure in William's basketball, which maintains a constant volume and has no leaks, decreases as the temperature decreases. Boyle's law pressure and temperature. Amadeo knows that he has twice as Amedeo has a 2 L balloon with He gas and a 1 L balloon with Ar gas, both at the many He atoms as Ar atoms. When Robert squeezes his balloon, he notes that its volume decreases but its pressure increases.

1. Which of the following statements could describe a saturated fatty acid? a.Contains two double bonds in the carbon chain. b.Contains one double bond in the carbon chain. C.Contains a trans double bond in the carbon chain. d.Contains a cis double bond in the carbon chain. e.Contains all single bonds in the carbon chain.

In order for a triacylglycerol molecule to form, which of the following must be true? a. Sphingosine must be present to link the fatty acid together. b. Water molecules must be added to form the bonds. C. Three identical fatty acids must be present. d.A dehydration synthesis reaction must occur. e.Hydrogen bonds hold the components together.