How much would it cost to buy nails that will be used to build a fence 125 meters long if it requires 30 nails per meter? Assume that 40 nails are sold per box at a cost of P10.75 per box.

Q: 17. A contaminated pond has a lead(II) ion concentration of 1.4 mg/L. This pond has a surface area…

A: Given that the surface area of the pond is 135 ft2. Depth of the pond is 2.8 ft. Volume of the pond…

Q: In 1993 the Minnesota Department of Health set a health risk limit for boron in groundwater of 600.…

A: Given that: mass per liter = 600 μg/L Volume = 94.0 mL To find the mass in micrograms of boron?

Q: 645 grams of pond water sample were gathered and known to contain 1.45 x 10 grams of cadmium. What…

A: ppb is stand for part per billion and is a way of expressing concentration of solution.

Q: 2. The approximate radius of a nucleus, r, is given by the formula r = A$(1.3x10-13cm), where A is…

A: Given: Atomic radius of Al = 143 pm Radius of nucleus=A13(1.3×10-13) cm

Q: If the density of ethanol is 0.789 g/mL, how many cm3 can be produced by the fermentation of 45.4 kg…

A: Ethyl alcohol is formed by enzyme action on sugars and starches by fermentation. C6H12O6 → 2 CO2 + 2…

Q: Electrical energy is usually measured in kilowatt-hours, kWh. A Watt is 1 joule per second. A…

A: Unit conversion refers to the process of changing a quantity expressed in one unit of measurement…

Q: Dimensional analysis & conversions. If you need scientific notation in you answer, copy this for the…

A: Given, mass of Sn(OH)2 = 10.44 g mass of tin (Sn) = ? Note:  Molar mass of Sn(OH)2 = 152.73 g/mol…

Q: You add 297 grams of NaCl to a container and then you add 898 grams of water to that same container.…

A:

Q: Zinc (Zn) Zn Copper (Cu) Cu 9.59 g mass The ammeter completed the run time for this experiment.…

A: A question based on mole concept that is to be accomplished.

Q: Lets start with the medical components. We need to determine how many units of the syringe…

A: To determine how many units of syringe can be made out of 2205 lbs of plastic. Given formula: No. of…

Q: The density of liquid ethanol C2H5OH is 0.789 g/mL. If 505 grams of glucose decomposes, how many…

A: The decomposition reaction of glucose can be expressed as,                 C6H12O6 (s) -----> 2…

Q: A 1.00 L bottle of wine, labeled as 8.5% (by volume) ethanol, is found to have a defective seal.…

A: When oxygen is leaked into the wine, it reacts with ethanol forming acetic acid and water.

Q: There are now about 332,400,000 people in the US.  a) how many moles of people is this? b) If 1…

A:

Q: What is the balanced chemical reaction for the combustion of TNT in air. Please use lowest possible…

A: C7H5N3O6(s) + O2(g) ----> CO2(g) + H2O(g) + N2(g)  The balance chemical equation for this…

Q: 38) During the early 1970s, the price of copper rose to a point where the cent contained almost one…

A:

Q: Gaseous methane (CH4) will react with gaseous oxygen (O₂) to produce gaseous carbon dioxide (CO₂)…

A:

Q: 6. Eggs shipped from a poultry farm in trucks. Each carton of eggs holds 12 eggs. The cartons of…

A:

Q: Given the following data, what was the dollar amount of the gold that could have been extracted from…

A:

Q: Chem 105 Online Data Collection and Calculations Part 1: Separation of Salt, Sand, and Iron Data…

A: Note: Since you have asked multiple questions, we will solve the first question for you. If you want…

Q: A teacher developed a new chemical - NONDISTRACTUS, which allows students to focus in the classroom…

A: Given: First-order decay with a half-life (t½) = 23 min = 1380 seconds Initial concentration of…

Q: a) Find the value k of the exponential growth rate. Assume V = 291. k= (Round to the nearest…

A: Base expression for exponential growth problem V = Vo ekt The equation can be rearranged as: k = 1t…

Q: Q1/ What are the main iron ores?

A: “Since you have asked multiple question, we will solve the first question for you. If youwant any…

Q: A chemist prepares a solution of potassium iodide (KI) by measuring out 51. μmol of potassium iodide…

A:

Q: using the balanced chemical equation, 2PbS +3O2-->2Pb + 2SO3, how many grams of lead will be…

A:

Q: I. BOILING POINT ELEVATION: The temperature of a boiling 50 mL of distilled water in an Erlenmeyer…

A: When a non-volatile solute is added to a solvent the boiling point of the resultant solution is…

Q: A chemist prepares a solution of calcium bromide (CaBr2) by measuring out 3.4 x 102 μmol of calcium…

A: Since concentration in mmol/L we have to find  And concentration = moles of solute / volume of…

Q: How many conversion factor(s) can be found in the following statement? " Americans combined drive…

A: Conversion factors are the mathematical relations between one unit of a physical quantity to another…

Q: A goldsmith wants to change the composition of 10 g 18K red gold (75% gold and 25% copper) into 60%…

A: 10 g 18 K red gold contains 75% gold + 25% copper

Q: balanced chemical equation in

A: We know the definition of the single displacement, double displacement reaction, decomposition,…

Q: 5. What are the properties of water that make it important for life? The substances that we are…

A: Water has many properties that makes it important part of life like universal solvent, high heat…

Q: One year, a herd of cattle released 1.94 metric tons of CH4 (methane) into the atmosphere. How many…

A: The mass of methane released by cattle in the atmosphere in a year = 1.94 metric tonsThe mass of…

Q: A chemist prepares a solution of potassium iodide (KI) by weighing out 0.5448 kg of potassium iodide…

A:

Q: Many common materials that we ingest, though quite safe in reasonable quantities, become toxic when…

A: Given : the volume of beverage consumed = 12 fl oz since 1 fl oz = 29.5735 mL  hence volume of…

Q: Chemical Formulas as Formulas: Converting between Grams of a Compound and Gram of a Constituent…

A: First convert given mass in kg  into grams .

Q: If you mixed 8.0 tons of sand, 12 tons of rock, and 4.0 tons of cement to make concrete, what would…

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: The following equation represents the reaction between aluminum (Al) and bromine (Br2) to produce…

A: Aluminium reacts with bromine to form aluminium bromide. The equation for the balanced chemical…

Q: Assuming that gasoline is 100% isooctane and that the density of isooctane is 0.792 g/mL, what mass…

A: Given reaction,        C8H18 + 12.5O2  → 8CO2 + 9H2O

Q: Question 11: You are a gemstone expert studying samples of various materials. Gemstone Hambergite…

A: From the given gemstones, the most massive gemstone is = Smoky Quartz (density = 2.65 g/mL) The…

Q: A 1 gallon bottle of a certain brand of bleach costs $1.49. Determine the cost to buy enough bleach…

A:

Q: hich metal is the best conductor of electricity? Choose from the choices below: Gold…

A: The answer of this question is given in step 2

Q: SECTION 2: Thinking 3. How many grams of air are required for an automobile to travel from Thunder…

A: A question based on mole concept. A set data for combustion of Octane is given using that the mass…

Q: An aluminum cylinder is 0.512 ft in length and has a diameter of 0.3142 inch. The density of…

A: The objective of the question is to calculate the volume, mass and the number of aluminum atoms in…

Q: Suppose you have a car which gets 51 miles per gallon of gasoline in the city. Suppose you take the…

A: The objective of the question is to find out how many kilometers a car can drive on city streets on…

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.