A 194g sample of caffeine contains 6.02 *10^23 molecules of caffeine. If a typical 10-hour energy drink contains 422mg of caffeine, how many molecules of caffeine are present in the drink?

Q: Sodium carbonate (Na2 CO3) is used to neutralize the sulfuric acid spill. How many kilograms of…

A: The reaction between sodium carbonate and sulfuric acid is as follows, The given mass of sulfuric…

Q: (5 Sulfuric acid (0.45M) (8T.5 ml) Copper ( hydroxide (1.15M) (15:5ml) Copper () sulfate ? grams H2O

A: Number of moles = mass/molar mass  Mass = moles × molar mass  Molarity = moles/volume of solution…

Q: International computer communications are often carried by optical fibers incables laid along the…

A: Given, the mass of optical fiber = 1.19 x 103 lb/m            Length of each strands optical fiber…

Q: Lithium is the least dense metallic element. Its density is 0.534 g/mL. What is the mass of lithium…

A: Given : Density = 0.534 g/mL Volume = 1.00 in3 Convert in3 into mL as follows. 1 in3 = 16.3871 mL

Q: The liquid substances mercury (density = 13.6 g/mL), water(1.00 g/mL), and cyclohexane (0.778 g/mL)…

A: Given: Density of mercury is 13.6 g/mL Density of water is 1.00 g/mL Density of cyclohexane is 0.778…

Q: A solution is labeled "(1.810x10^1) % sucrose by mass". If an experiment requires (7.79x10^1) g of…

A:

Q: Cyanidin chloride (C15H11O6Cl) contains the cyanidin ion, a pigment found in many berries. Calculate…

A: Here, we have to calculate number of moles of cyanidin chloride present in 7.2 mg.

Q: A cheap reliable fertilizer, NH4NO3, adds nitrogen to the soil. If you add 48.5g of fertilizer to…

A: In order to find the amount of nitogen added to the soil we first write down the given data: Mass of…

Q: A sample of vinaigrette salad dressing has a total mass of 188 g188 g , a total volume of 196 cm3196…

A:

Q: What is the mass of a golf ball traveling at 82.0 ms 1? The rest mass of a golf ball is 45.9 g, as…

A:

Q: A pharmacy technician is asked to dispense 250ml of solution which contains 0.05g/5ml of drug. How…

A: Mass can be measured in different units such as grams (g), kilogram (kg), milligrams (mg)  Some…

Q: According to the National Heart, Lung, and Blood Institute, LDL-cholesterol levels of less than 130…

A: LDL-cholesterol stands for low density lipoprotein cholesterol. These cholesterol are bad for the…

Q: 14K yellow gold is an alloy that contains gold, copper and silver. A 14K gold ring contains 6.90g of…

A:

Q: The concentration of carbon monoxide in an urban apartmentis 48 mg>m3. What mass of carbon…

A:

Q: How many quarts of gasoline are there in 248 grams of gasoline if gasoline has a density of 0.749…

A:

Q: In the combustion of ethanol, 20.50 g of carbon dioxide gas was produced, What is the volume in mL…

A:

Q: If each bottle contains 1.61 ptpt of mouthwash with a density of 0.876 g/mLg/mL, how many kilograms…

A: A mouthwash is 21.6% ethyl alcohol by mass.  The mass of ethanol in 190 bottles is calculated as,

Q: Carbon

A: Avogadro's  number gives the number of atoms, molecules or ions in one mole of the substance and it…

Q: Lipitor, a pharmaceutical drug that has been shown to lower "bad" cholesterol levels while raising…

A: Given  The mass of the 1 pill = 1.0g  Active ingredient contain in each pill = 5.5% i.e., (5.5/100)…

Q: How many mL of paraffin wax would it take to make a candle of this size, with a volume of 11.0 in³ ?

A: Given: Volume = 11.0 in3.

Q: A chemist adds 415.0 mL of a 9.84 × 10 "M magnesium fluoride (MgF2) solution to a reaction flask.…

A:

Q: You wish to prepare 211 grams of 16.6 % Mg(CH3COO),. . You will need grams of magnesium acetate and…

A:

Q: What is 393.83 kJ/mol rounded to three significant figures?

A: Based on the significant figures rule, the number to be rounded off is followed by digit zero or…

Q: Lipitor, a pharmaceutical drug that has been shown to lower "bad" cholesterol levels while raising…

A: Given,2.0g pill contains 7.5% of the active ingredient by mass.Then,25 pills contains = ?

Q: Assume household vinegar contains 5% acetic acid by weight and that the density of vinegar is the…

A: Solution Vinegar may be a bitter liquid consisting principally of carboxylic acid and water.…

Q: HUIA (OH]= 1.1 x 10° M [H,O'] = 5.0 x 107 M Milk

A:

Q: You wish to prepare 222 grams of 21.2 % Ca(CH3CO0)2. You will need grams of calcium acetate and mL…

A:

Q: 210 mg glucose per 100 ml blood. Avg body contains 11 pints, how many grams glucose. 1 pt =…

A:

Q: Suppose a student places a beaker on his balance and does not tare it. Then, he adds three…

A: Here you should understand that if you have nothing in the beaker it is the empty weight of beaker.

Q: If a person has a blood glucose level of 106 mg / 100. mL, a level that can cause brain damage, what…

A:

Q: Franklin was performing an experiment by combining hydrochloric acid and sodium hydroxide. He…

A: The basis to answer this question is the law of conservation of mass.

Q: A chemist prepares a solution of magnesium fluoride (MgF,) by measuring out 0.032 µmol of magnesium…

A: Concentration of a solution is the ratio of moles of solute to volume of solution.

Q: A drink sold in a health food store contains 0.50% (w/v) of vitamin C. What volume would you have to…

A: This problem can be solved by using the formula given below as; %wv = Mass of solute (g)Volume of…

Q: A jet airplane reaches 675./kmh on a certain flight. How long does it take to cover 291.m? Set the…

A: Given that the velocity is 675 km/h. The given velocity has to be converted to m/h

Q: What is the equivalent volume in milliliters taken up by 9 gr boric acid powder if the density of…

A:

Q: A certain solution is 4.40% by mass in calcium carbonate (CaCO3) if the density of the solution is…

A: Given that: Mass percent of calcium carbonate = 4.40% Density of the solution = 1.02 g/mL Volume of…

Q: Fermentation is a complex chemical process of wine making in which glucose is converted into ethanol…

A: First of all, assign molar masses to each reactant and product in the equation and then, from…

Q: your front lawn is 24.0 feet wide and 20.0 feet long, and each square foot of lawn accumulates 1150…

A:

Q: The solubility of potassium chromate is 65.7 g per 100 g of water. In an experiment , a student had…

A: Given solubility of potassium chromate is 65.7 g per 100 g of water. Given volume of water is 762…

Q: -H,0 10 g C,H1,06

A: Dear student I have given answer to your question in the image format.

Q: a pharmacy technician is asked to prepare an antibiotic IV that will contain 454mg of cephalosporin…

A: The given information is,

Q: Propylene glycol (C3H3O2) is a clear viscous liquid with a density of 1.04 g/mL. What is the volume…

A: Density :-  The ratio of mass of a substance to volume occupied by that substance at a particular…

Q: 9. Which of the following statements does not describe a physical property of chlorine? A) Chlorine…

A: 9. Physical properties - Properties that can be measured without changing the identity of a…

Q: What is the volume of 12.0 grams of an alcohol whose density is 0.920 g/mL?

A: Since density is defined as the mass of compound per volume of the compound Hence density = mass /…

Q: What mass (in kg) of saltwater would fill an olympic-size swimming pool that is 50.0 meters length,…

A:

Q: What is the mass of a golf ball traveling at 88.1 ms1? The rest mass of a golf ball is 45.9 g, as…

A:

Q: One of the common intravenous fluids, called physiological saline, is a homogeneous mixture of NaCl…

A: Given: The mass % of NaCl in thephysiological saline, =  0.89% (m/m). The density of physiological…

Q: In some polluted city air the amount of lead was measured at 3.1 x 10^-6 g/m^3. What is the amount…

A: Cubic meter and cubic centimeter are some common units of volume. Similarly, grams and kilograms are…

Q: To aid in the prevention of tooth decay, it is recommended that drinking water contain 0.900 ppm…

A: Formula used  ppm = (Mass of solute/mass of solution) 106 ppm = parts per million  density of water…

Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.