A solid circular cone made of pure platinum (density = 21.45 g/cm3) has a diameter of 2.75 cm and a height of 3.00 inches. How many moles of platinum are there in the cone?

Q: In the room, the police also found a suspicious amount of CO2 in the air, which is produced when…

A: Combustion reactions of methanol is 2CH4O+3H2O→2CO2+4H2O 2 mole of methanol is producing 2 moles of…

Q: What is the mass in grams of 0.375 mole diatomic chlorine?     13.3 g     0.0134 g     2.26 x…

A: Moles of component is defined as ratio of the given mass to the molar mass. The relation for the…

Q: . In a blast furnace, iron (III) oxide reacts with coke (carbon) to produce molten iron and carbon…

A: By the balanced given reaction,  1 mole of Fe2O3 forms 2 mole of Fe .  Now, given moles of Fe2O3 = =…

Q: 1) Determine the number of moles in each sample: a) 38.2g sodium chloride b) 36.5g nitrogen monoxide…

A:

Q: Iron is found in Earth’s crust as several different iron com-pounds. Calculate the mass (in kg) of…

A: 1.0  103 kg of iron. Fe2O3 (hematite) Fe3O4 (magnetite) FeCO3 (siderite)

Q: Determine the mol H2O/mol CaSO4 if you have the following data to teo decimal places. Mass of…

A:

Q: One mole of particles of any substance contains is:   a. 3 x 10-10particles     b. 106particles…

A: Note : 1 mole of substance contains 6.023 x 1023 molecules.

Q: How many grams of CO2 are formed from the combustion of 129 g methane?

A: The above question can be solved by using stoichiometric calculations.

Q: What mass of HCl in grams is neturalized by a dose of milk of magnesia containing 3.26g Mg(OH)2?

A: Given :- mass of Mg(OH)2 = 3.26 g  To calculate :- mass of HCl (in g)

Q: In the laboratory, a student weighs out 0.0852 g of cobalt on balance.  How many atoms of cobalt are…

A: Molar mass of an element represents the mass of one mole of the element.

Q: What is the Mass pf Cl- found in the water sample (in grams)? %(w/w) Cl- in the water sample?…

A: Given data,Mass of titrant(AgNO3) used in trial 1=0.76gMass of AgNO3 used in trial 2=0.73gMass of…

Q: What mass (in kg) does 4.41 moles of copper have?     0.784 kg     0.444 kg     0.280 kg…

A: Given -  No of moles =4.41 moles  Molecular mass of  copper (M) = 63.546  g / mol No of moles = 4.41…

Q: which statement correctly describes the chlorine atom in the following process? cl- --> clo3…

A: For the reaction Cl-1 → ClO3-1 In Cl-1, chlorine is having an oxidation number of -1. And, In…

Q: you only have unlimited amounts of hydrogen gas but only have 150.0g of oxygen gas

A: Given that mass of oxygen is 150g.and a balanced reaction is given.

Q: H20(f) – Ca (aq) + OH (aq) + |H2(g) Ca(s)

A:

Q: In a laboratory experiment, 5.0 g of aluminum metal is exposed to 23.2 g of chlorine gas which…

A: The limiting reagent in a chemical reaction is a reactant that is totally consumed when the chemical…

Q: If there were 4.00 x 10^23 sodium ions available, (and more than enough carbonate ions), how many…

A:

Q: 4-During the water of crystallization Mass of an empty crucible 40.60 g. experiment, the following…

A:

Q: The average human fart contains .00643 g of methane gas. 1) Write and balance the reaction for the…

A: CH4+2O2→CO2+2H2OMass of CH4=0.00643g1mol of CH4=16gno. of moles of methane=0.0064316=0.00040.004…

Q: You are making double-decker sandwiches; each sandwich consists of 3 slices of bread, 2 chicken…

A:

Q: Automobile airbags inflate due to the formation of nitrogen gas from the chemical reaction 2 NaN,(s)…

A: Given :-  2NaN3(s) → 3N2(g) + 2Na(s)  To determine :-  number of Na and N atoms in both reactant and…

Q: If liquid bromine has density = 3.12 g/mL, how many Br2 molecules are present in a 1.0-mL sample of…

A: Given: Density of liquid bromine (d) = 3.12 g/ml The volume of liquid bromine =1.0 ml To find:…

Q: 6.022 x 1023 molecules are present in 1 mole of a substance. TRUE FALSE Check it skip

A: Molecule - molecule is a smallest particle made up of two or more atoms which are held by chemical…

Q: How could he find the correct coefficients? O by counting each individual atom and making sure 'the…

A: The question is based on the concept of balancing the chemical equation. we have to identify the…

Q: A website promoting the use of alternative energy vehicles and hybrid technologies claims that, "A…

A: Since you have posted multiple questions, we will solve first one for you. To get remaining solved…

Q: a) What is the mass, in grams, of 5.000 moles of carbon atoms? b)What is the average mass, in…

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

Q: If 60.2 grams of Hg combines completely with 24 grams of Br to form a compound, what is the %…

A: Given: Mass of mercury (Hg)=60.2 g Mass of Bromine (Br)=24 g The total mass of compound =(60.2 +24)…

Q: What is the mass (in grams) of 5.03*10^22 molecules of CO2 molecules?

A: 1 mole = 6.0226 x 1023 Molar mass of CO2 = 44.01 g/mol Given that: Number of molecules of CO2 = 5.03…

Q: MgNH4PO4•6H2O loses H2O in a stepwise fashion as it is heated. Above 100 degrees celsius, the…

A: Hydrated magnesium ammonium phosphate (MgNH4PO4.6H2O) is heated over 100˚C  and converted into the…

Q: A truckload of apples weighs 2550lb. If 5 (exact) apples weigh 1250g: how many apples are in the…

A: Mass of 5 apple = 1250 gMass of 1 apple= 1250g5= 250 gMass of apples in truck = 2550 lb1 lb =…

Q: A student prepares aspirin using 17.268 grams of salicylic acid (MW = 138 g/mol) and 5.56 mL of…

A:

Q: Magnesium oxide can be made by heating magnesium metal in the presence of oxygen.  What will the…

A: The chemical reaction regarding the formation of magnesium oxide is  2Mg(s) +O2(g) ---->>>…

Q: A chemist needs 1.28 g of sodium hypochlorite, NaOCl(s), for an experiment, but she only has sodium…

A: The mass of a compound can be determined by the molar mass of compound and the respective molar mass…

Q: A student finds that they have 0.2545 g of NH4Cl, 1.1502 g of NaCl, and 1.0181 g of SiO2. Calculate…

A: Given  mass of NH4Cl = 0.2545g mass of NaCl = 1.1502 g mass of  SiO2 = 1.0181 g Initial mass if…

Q: Aqueous solutions of (NH4)3 PO4 and CaCl2 are mixed together and produce Ca3(PO4)2 and NH4Cl. When…

A: The reactants given are 1) (NH4)3PO4  2) CaCl2  And the products forming are 1) Ca3(PO4)2  2) NH4Cl…

Q: Calculate the mass of copper that can be made from the combination of 15.0 g aluminum with 25.0 g…

A: Mole of Al in 15.0 g Aluminum is calculated as,                                               Mole…

Q: You weigh a dry flask, and place a chunk of solid into it, then weigh it again. You then fil the…

A:

Q: When the following equations are balanced using the smallest possible integers, what is the number…

A: Balancing the reaction is not very tough.  Here we have to eqalise the things on both side.

Q: Ammonia NH3 chemically reacts with oxygen gas O2 to produce nitric oxide NO and water H2O. What mass…

A: Ammonia NH3 chemically reacts with oxygen gas O2 to produce nitric oxide NO and water H2O. The…

Q: An ice freezer behind a restaurant has a freon leak, releasing 48.73 g48.73 g of C2H2F3Cl into the…

A: Given: Total mass of C2H2F3Cl released per week = 48.73 g. And total months passed = 6 months.

Q: 29. For items 29 - 32, please refer to the following chemical equation:CuCi2 + 2 NaNO3 - Cu(NO3)2 -…

A: Consider the given information is as follows; Reaction:      CuCl2     +  2 NaNO3   →    CuNO32   +…

Q: Combining one atom of carbon with two atoms of oxygen produces one molecule of carbon dioxide, along…

A:

Q: 7. To make a ham sandwich, you choose to use 2 pieces of bread (B), 4 slices of ham (H), and 1 slice…

A: Given, Peices of Bread = 14 Slices of Ham = 24 Slices of cheese = 7

Q: What is the volume (in mL) of isopropanol that contains 7.23 × 1022 molecules of isopropanol? The…

A:

Q: Aluminum has a density of 2.70 g/cm^3. How many moles of aluminum are in a 13.2 cm^3 block of the…

A: Given,  Density of Aluminium = 2.70 g/cm3  Volume = 13.2 cm3

Q: I am having a bit of trouble with significant figures and rounding. In a question such as the one…

A: Significant figures are basically the measure of uncertainty in measurement.In the answer,digits are…

Q: A bottle of a tile cleanser contains 135g og HCl and 775g of water. What is the percent by mass og…

A:

Q: A sample of a compound has a mass of 41.13g. The sample is found to contain 37.28g of carbon and…

A: Percent composition of the compound is described as the percent of mass of each component of the…

Q: A chemist will use a sample of 30 g of ethanol (CH3CH2OH) in an experiment. In one to two sentences,…

A: Given :-  mass of ethanol = 30 g  carbon      12.01 hydrogen   1.01 oxygen      16.00   To calculate…

Q: Given the graph beloW, which color represents each chemical? N, + 3 H, 2 2NH,

A: We are given the following chemical equation. N2(g)+3H2(g)⇋2NH3(g)

Mass Spectrometry

This process is an instrumental method in which a sample is changed to fast moving positive ions by electron bombardment. The charged particles vary due to their different mass to charge ratio and are estimated with the help of this difference. It is also called mass spectroscopy.