Brasses are alloys in which copper is the primary component and zinc is the second most abundant element. Naval brass, which has a high resistance to salt corrosion is 60.0% Cu, 39.25% Zn, and 0.75% Sn. How many moles of zinc are present in a 72.1 gram sample of naval brass? Report your answer with three significant figures.

Q: If the mass of Mg is 0.19g and the product mass is 0.74g. What is the moles of Mg in the product

A: In this question, we have to calculate the number of moles of Mg produced. 1 mole of any substance…

Q: How many moles of potassium ions are in 360. g alum?    (b) What is the mass % S in alum (to 3…

A:

Q: Consider the chemical equation: CO + Fe2O3 → Fe + CO2. How many grams of iron can be produced given…

A: Given that Number of moles of CO = 12.0 molNumber of moles of Fe2O3 = 12.0 mol Balance the given…

Q: 1. Cyanogen gas, C2N2, has been found in the gases of outer space. It can react with fluorine to…

A: We have to predict the moles of fluorine needed.

Q: Now that we have put coefficients of 3 in front of CASO4 and CaCl2 , what coefficient should go in…

A: According to the Law of conservation of mass " all atoms of different elements must be equal on both…

Q: A common laboratory method for preparing oxygen gas involves decomposing potassium chlorate (KClO3),…

A:

Q: complete the following table for tnt trinitrotoleune

A:

Q: How many molecules are contained in a glass that holds 490 g of water? How many moles does that…

A: The mass of one mole of molecules is known as molar mass. We know that the molar mass of water is…

Q: Consider a sample of carbon tetrafluoride that contains 1.09 × 10²⁴ atoms of fluorine. 1.) Using…

A: In international system of unit, there are seven basic units. Out of those seven unit Mole is one of…

Q: How many moles of phosphorus pentachloride, PCl5, are present in a sample that contains 4.60 moles…

A:

Q: The reaction between solid whit phosphorus and oxygen produces solid tetraphosphorusdecoxide…

A: Given data, Mass of P4 = 25.0g Mass of O2 = 50.0g Moles of a substance is defined as the ratio of…

Q: How many molecules are in the sample? 87 g CCl4 Express your answer using two significant figures.

A: Number of moles can be calculated as follows: No. of moles = MassMolar massNo. of moles = 87g153.82…

Q: Florasulam is an herbicide with the chemical formula C12H8F3N5O3S. Answer the questions below…

A:

Q: he Freons are a class of compounds containing carbon, chlorine, and fluorine. While they have many…

A: HFC-134a  is CH2FCF3 HCFC-124 is CHClFCF3

Q: 1. Ammonia, NH3, a common fertilizer is made by causing hydrogen (H2) and nitrogen (N2) to react at…

A:

Q: Particular thermos can hold 473.2 ML of warm beverage. If the Thermo is filled with hot cocoa, which…

A: Given that,Concentration of the sugar = 0.23 M = 0.23 mol/L Capacity of the solution in thermos =…

Q: A chemist weighs 50.0 grams of solid NaOH. a) How many moles of NaOH are in the sample? [ Select ]…

A:

Q: A compound containing only C, H, and O, was extracted from the bark of the sassafras tree. The…

A: Given,47.3 mg sample produced 128 mg of CO2 and 26.3 mg of H2OMolar mass of carbon = 12.0107Molar…

Q: The Haber-Bosch process involves the combination of nitrogen and hydrogen at high temperatures in…

A: Nitrogen reacts with hydrogen to form ammonia. The equation for the balanced chemical reaction is…

Q: A 58.5 g sample of an unknown compound that contains only carbon, hydrogen and oxygen was analyzed…

A: Given: The mass of the unknown compound is 58.5 g The mass of CO2 (carbon dioxide) is 105.6 g The…

Q: How many grams of HNO, are in 3.255 × 1022 molecules of HNO,? Show the conversions required to solve…

A:

Q: Methanol can be formed by the following UNBALANCED equation below. What is the mass in grams of…

A:

Q: The borax powder has the formula Na2B4O7.X H2O when 2.10 g of hydrate is heated in a crucible until…

A: given data is  amount of sample taken is 2.10g residue left is 1.10g M.Wt of Na2B4O7  is 201.0g

Q: A mixture of N2(g) and H2(g) reacts in a closed container to form ammonia, NH3(g). The reaction…

A: The chemical reaction involved when N2 and H2 gases react to  form NH3 gas is  N2(g) + 3H2(g)…

Q: How many moles of pentane (C 5H 12) are contained in the following number of molecules? a. 5.00 × 10…

A: Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts for you.…

Q: 1.500g sample of a hydrocarbon undergoes complete combustion to produce 4.40g of CO2 and 2.70g of H2…

A: Given: sample of hydrocarbons undergoing complete combustion= 1.5g  Products formed are carbon…

Q: How many moles of aspirin are in the tablet?

A: Number of moles = mass/molar mass  1 mol = 6.022 × 1023 molecules

Q: 51 Caffeine Caffeine, found in coffee, tea, chocolate, cola beverages is a highly popular stimulant…

A: Note - “Since you have posted a question with multiple sub-parts, we will solve first three…

Q: The Haber-Bosch process involves the combination of nitrogen and hydrogen at high temperatures in…

A:

Q: This Is the chemical formula for talc (the main Ingredient In talcum powder): Mg,(Si,0,),(OH), An…

A: Using the number of moles of oxygen, we will calculate the moles of hydrogen in the talc from its…

Q: Naproxen is used to treat the pain and inflammation caused by arthritis. Naproxen has a formula of…

A: The chemical formula of naproxen is  This chemical formula indicates that: 1 mole of naproxen…

Q: 1)Copper metal reacts with molecular nitrogen to form copper(II) nitride.  a)Write the balanced…

A:

Q: cylinder contains 1.475 x 1024 argon atoms. How many moles of argon are there in the cylinder?

A:

Q: tablet of Mylanta antacid contains 0.300 g Mg(OH)2 and 0.200 g Al(OH)3. For the blanks in this…

A: Mass of Mg(OH)2 = 0.300 g  Mass of Al(OH)3 = 0.200 g

Q: 2. Alex has a big black tattoo of a teddy bear on their back. Iron (II, III) oxide was used as the…

A: Given:  The chemical formula is :  Fe3O4 sol a)   molar mass  =  3 Fe + 4 O =  (3 x 55.84)  +  (4 x…

Q: 1. Aluminum metal reacts with aqueous sulfuric acid to produce aqueous aluminum sulfate and hydrogen…

A: 1. The maximum amount of Aluminium sulphate that can be produced is 58.8 g

Q: Vitamin B12 , cyanocobalamin, is essential for human nutrition. It is concentrated in animal tissue…

A: The molar mass of cyanocobalamin is calculated using cobalt’s molar mass in step two.

Q: A multi-nutrient fertilizer contains several different nitrogen containing compounds. The fertilizer…

A: The mass percent of a substance is defined as the ratio of the mass of the substance and the mass of…

Q: The gemstone tanzanite was first discovered in Tanzania in 1967. Like other gemstones, it contains…

A:

Q: buprofen is an anti-inflammatory with the formula C13H18O2 A. What is the molar mass of ibuprofen?…

A: The answer can be calculated by the simple unitary method.

Q: Be sure to answer all parts. Nitroglycerin (C;H5N3O9) is a powerful explosive. Its decomposition may…

A:

Q: 1. A chemist made a new compound and had its elemental composition analyzed. The results of this…

A: Given: Mass of  C = 1.388 g Mass of H = 0.345 g  Mass of O = 1.850 g  To find : a) Percent…

Q: How many grams of hydrogen gas are formed by the reaction of 3.457 g of aluminum with nitric acid?…

A:

Q: a. Calculate the molar masses of these two compounds(CH2FCF3 and CHClFCF3). b. What is the percent…

A: a) This question asks us to find the molar mass of two compounds given. b) Percentage composition…

Q: A chemist set up a synthesis of phosphorus trichloride (PCl3) by mixing 12.0 g of phosphorus (P)…

A: Given data: 12 g Phosphorous react with 35 g of chlorine to give 42.4 g of PCl3 . % yield of…

Q: Consider 68.9 g of Pb(SO4)2 to answer the following questions. a. How many moles of Pb(SO4)2 is…

A: Given mass of Pb(SO4)2 = 68.9 g

Q: how many molecules are in the sample 2.0 g H2O? Express your answer using two significant figures.

A: Number of moles of water can be calculated as follows: No. of moles = MassMolar massNo. of moles =…

Q: Predict how many moles of CaO he should have ended up with, using the following steps. Given that…

A: Given, Amount of CaCO3 = 5.0 g Molar Mass of CaCO3 = 100 g/mol Formula Used:

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.