In a candy factory, the nutty chocolate bars contain 24.5 % pecans by mass. If 6.5 kg of pecans nutty chocolate bars were made? Express your answer to two significant figures.

Q: Water has a density of 0.997 g/cm3 at 25 °C, ice has a density of 0.917 g/cm3 at -10 °C. If a…

A: Given data, Density of water at 25oC = 0.997 g/cm3 Density of water at - 10oC = 0.917 g/cm3 Volume…

Q: A citrus dealer in Florida sells boxes of 100 oranges at a roadside stand. The boxes routinelyare…

A: Given data contains, The average weight of orange is 7.2 ounces. Average weight of the boxes is 3.2…

Q: From 1962 until 1981 pennies were made from 95% copper and 5% zinc and had a mass of 3.1 g. Starting…

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Q: Chalcopyrite, the principal ore of copper (Cu), contains 34.63% Cu by mass. How many grams of Cu can…

A: % is calculated on the basis of 100.

Q: Gaseous methane (CH) will react with gaseous oxygen (0,) to produce gaseous carbon dioxide (CO, and…

A:

Q: An infant formula of acetaminophen contains 80. mg of acetaminophen in every 0.800 mL of liquid. An…

A: To find out how many milliliters (mL) of infant formula should be given to the child, we can use the…

Q: If 20.0 Cal make an ounce, how many ounces of formula should a baby drink per day if the energy need…

A: 1 ounce = 20.0 cal Since per day a baby drink 1.50 ×103 cal No of ounces = 1.50 ×103/20 = 75

Q: Aqueous hydrochloric acid (HCI) will react with solid sodium hydroxide (NaOH) to produce aqueous…

A: The reactant which produces the least amount of product is called limiting reagent and the amount of…

Q: Aqueous hydrochloric acid (HCl) will react with solid sodium hydroxide (NaOH) to produce aqueous…

A: The reaction of aqueous HCl with NaOH results in the formation of aqueous NaCl and water. Amount of…

Q: 305. g of two different liquids are poured into beakers. This is what the beakers look like just…

A: As we can see that volume for liquid A is less than volume of liquid B  mass is same for both liquid…

Q: A child must take 10 mL of cephalexin, an antibiotic, by mouth 2 times a day for 7 days. The…

A: Given : volume of each dose = 10 mL number of doses in a day = 2  number of days the dose need to be…

Q: 1.  A 22.65-g sample of a solid is placed in a flask. Ethanol is added to the same flask having the…

A: Given that -  Mass of sample of a solid = 22.65 g  Volume of ethanol + solid = 45.00 mL  Mass of…

Q: A chemistry student needs 45.0 g of thiophene for an experiment. He has available 1.5 kg of a 8.28%…

A: 8.28 % w/w means 8.28 g thiophene in 100 g solution.

Q: Aqueous hydrochloric acid (HCI) will react with solid sodium hydroxide (NaOH) to produce aqueous…

A: Mass of HCl = 8.0 g Mass of NaOH = 13.6 g Mass of HCl left over by the chemical reaction = ?…

Q: Aqueous hydrochloric acid (HCl) will react with solid sodium hydroxide (NaOH) to produce aqueous…

A: Mass of HCl = 2.55 gMass of NaOH = 1.3 gMass of sodium chloride (NaCl) formed = ?

Q: A chemist must dilute 22.0 mL of 45.9 µM aqueous magnesium fluoride (MgF₂) solution until the…

A:

Q: 2. A small block of a metal with a mass of 223.1 grams when submerged in a beaker containing water,…

A: Given, Mass of metal block = 223.1 g  Volume of water level rised after addition of metal = 150.0 mL…

Q: An infant ibuprofen suspension contains 100 mg per 5.0 mL suspension.  The recommended dose is 10 mg…

A:

Q: Gaseous methane (CH₂) will react with gaseous oxygen (O₂) to produce gaseous carbon dioxide (CO₂)…

A: Given:mass of methane (CH4 ) = 1.1 gmass of Oxygen (O2 ) = 7.93 gmolar mass of CH4 = 16.04…

Q: mercury density= 13.6 g/mL How many grams of mercury are present in a barometer that holds 5.0 mL of…

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Q: A chemistry student needs 5.00 g of acetic acid for an experiment. She has available 250. g of a…

A: Given,  250 g of a 15.8% w/w solution of acetic acid in ethanol. And 5.00 g of acetic acid is needed…

Q: Aqueous sulfuric acid (H₂SO4) will react with solid sodium hydroxide (NaOH) to produce aqueous…

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Q: Gaseous ethane (CH3 CH3) will react with gaseous oxygen (O₂) to produce gaseous carbon dioxide (CO₂)…

A:

Q: prepare

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Q: Gaseous methane (CH4) will react with gaseous oxygen (0₂) to produce gaseous carbon dioxide (CO₂)…

A: Given,when gaseous methane ( CH4 ) reacts with O2 (g) to form gaseous water ( H2O ) and carbon…

Q: A Chemistry 20 student uses a thermometer and a hot plate and measures the boiling point of ethyl…

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Q: To prevent bacterial infection, a doctor orders 6 tablets of amoxicillin per day for 11 days. If…

A: Mass of any substance can be expressed in different units such as grams , milligrams , kilograms ,…

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

A: we have to determine the mass of carbon dioxide that can be produced in the reaction

Q: An infant acetaminophen suspension contains 80.0mg/0.80 mL suspension. The recommended dose is 15…

A: The weight of infant in kg:

Q: Stephen filled his 25 mL buret in order to dispense a precise amount of volume. The image below…

A: A question based on general chemistry that is to be accomplished.

Q: In a candy factory, the nutty chocolate bars contain 25.0 % pecans by mass. If 6.7 kg of pecans were…

A: Percent by mass concentration of a substance is defined as the ratio of the mass of that substance…

Q: 1.32×106 kJ to kcal Express the value in kilocalories to three significant figures.

A:

Q: Ocean water contains 3.5  %   NaCl  by mass. What mass of ocean water in grams contains 48.8  g  of…

A:

States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.