round answer to three significant figures. The formula of sodium nitrate is NaNO3. determine the percent copostion of sodium in this compound.

Q: estion 15 of 27 How many grams of F are in 155 g CaF,? mass:

A:

Q: A student obtains 50.00 grams of calcium hydroxide.  Determine the number of hydroxide ions present…

A: The chemical formula of calcium hydroxide is Ca(OH)2. One molecule or unit of it contains one…

Q: How it is useful and important the knowledge of mass percent and morality calculation in healthcare…

A: Mass percent is the measurement of an element in the molecule,compound or tablet in case of…

Q: How many moles are in 1.05 x 1022 molecules of an unknown compound? Your Answer: Answer units

A: Here, we have to find the number of moles present in 1.05 × 1022 molecules of an unknown compound.

Q: Refer to the periodic table inside the front cover of this textbook. State the mass of Avogadro’s…

A: The mass of Avogadro’s number of atoms is the atomic mass expressed in grams. Therefore, 6.02 × 1023…

Q: How many grams are there in a 0.5978 mol sample of carbon? Your Answer: Answer units

A: Given,

Q: formula mass MgBr2.

A:

Q: This is the chemical formula for nickel tetracarbonyl (a powerfully poisonous liquid used in nickel…

A: Solution - According to the question - Given - Mole of Ni(CO)4 = 34 moles Mole of oxygen in 1 mole…

Q: A tank contains a mixture of 160 grams of helium and 440 of carbon dioxide. a. Calculate the number…

A: Given data, Mass of He = 160g Mass of CO2 = 440g Data taken from google; Molar mass of He = 4g/mol…

Q: Label the diagram to correctly convert 0.512 mol HCI to mol Al, as per the below 2 AL + 6 HCI --> 2…

A: Given chemical reaction, 2 Al + 6 HCl → 2 AlCl3 + 3 H2

Q: You have a sample that contain 5 moles of zinc. A)what is the mass of zinc in the sample?

A: moles of Zn= 5 mol mass of Zn=?

Q: f you have a 456 g sample of KMnO4, how many formula units of KMnO4 are in the sample? Answer in…

A: Given : Mass of KMnO4 = 456 g

Q: What is the mass of 6.00 moles of magnesium chloride, MgCl2 ? Express your answer with the…

A: Molar mass of MgCl2 = 95.211 g/mol

Q: Calculate the number of N atoms in 0.549 mg of NH4NO2. Answer in scientific notation

A: We have to calculate the number of N atoms in 0.549 mg of NH4NO2.

Q: The Alka-Seltzer experiment produced 0.000322 moles of carbon dioxide. What is the mass of NaHCO3…

A:

Q: Suppose the stockroom made a mistake and gave you a mixture of potassium chlorate and potassium…

A: We are to discuss if mass percent of oxygen is smaller or larger in mixture of potassium chlorate…

Q: 9) Na2CrO4 # of molecules: # of elements: Name of element: # of atom Total # of atoms:

A: Sodium chromate is the inorganic compound having chemical formula of Na₂CrO₄.

Q: How many millimoles of calcium nitrate contain 4.78 x 1022 formula units of calcium nitrate?

A: Avagadro number gives the number of atoms or molecules present in one mole of the substance. It has…

Q: Determine the formula weight of a neutrally charged ionic compound that contains the lithium ion and…

A: Formula weight =mass of element×100÷mass of compound Li2SO4 formual weight of Li=12.72% Formula…

Q: Calculate the number of phosphorus atoms in 0.9 g of phosphorus.Answer in units of atoms.

A: Given,Mass of phosphorus = 0.9 gMoles of phosphorus can be calculated as:

Q: Calculate the mass in grams for: 0.00100 mol silicon tetrahydride (SiH4)

A: Because, the number of moles(n) is defined as the ratio of the mass of compound(SiH4, here) and…

Q: Vhat is the empirical formula fc

A: Y Ba2Cu2O5 is the Empirical formula

Q: How many moles are in 100.0 g of gold? Show your calculations and answer with unit.

A: Given: Mass of Gold= 100 g To Calculate: Moles of Gold

Q: Part A Notice that "SO4" appears in two different places in this chemical equation. SO, is a…

A:

Q: What mass of barium bromate, Ba

A:

Q: Notice that "SO," appears in two different places in this chemical equation. SO, is a polyatomic ion…

A: SO42- is a polyatomic atom.  Considering it to be  1 atom, we will balance the given reaction. CaSO4…

Q: This is the chemical formula for chromium(III) carbonate: Cr,(CO,); Calculate the mass percent of…

A: ★ Answer :  ★ solution :  The formula of the given compound is  Cr2(CO3)3. To calculate percentage…

Q: 47) Calcylate the percent listed first in the formulas by mass of element

A:

Q: A molecule contains only carbon and hydrogen. The percent hydrogen is 27.45 %. Determine the…

A: The emperical formula of the compound is given below

Q: What is the percent composition of carbon in methane, CH? Round off your answer to the nearest tenth…

A:

Q: ART A: WATCH THE VIDEO to fill in the blanks and answer the questions. he mole = things. wo moles…

A: 1 mole is a measuring unit in chemistry. Just like in our day to day life we use measuring units…

Q: Suppose the stockroom made a mistake and gave you a mixture of potassium chlorate and potassium…

A: Mass percent can be defined as the how many part can exist for every 100 part as a whole.

Q: A sample is marked as containing 47.9 percent calcium carbonate by mass. How many grams of calcium…

A: Given, mass of a sample = 58.9 gThe sample contains 47.9 percent calcium carbonate by mass. The mass…

Q: A 4.00 gram sample of hydrate of nickel(II) bromide loses 0.793 grams of water when heated.…

A: Mass of hydrated nickel bromide = 4 gWhen it heated it lose water of 0.793 g from nickel…

Q: the calculated number of molecules of calcium carbonate (CacO.) in a piece of chalk, determine the…

A: From the calculated number of molecules of calcium carbonate (CaCO3) in a piece of chalk, determine…

Q: Ethylene glycol contains 38.7% carbon, 9.7% hydrogen, 51.6% oxygen, and a molar mass of…

A: First of all we will calculate the empirical formula by dividing percentage mass by their atomic…

Q: What is the mass of 7.24x10 to the 23rd formula units of barium oxide?

A:

Q: What is the mass of 22.8 moles of copper atoms? Round your answer to the nearest hundredth. Be sure…

A: Given : Moles of copper = 22.8 mol Atomic mass of Cu = 63.546 g/mol

Q: You have 15.31 g of an unknown compound. Through analysis, you have determined that this sample…

A: Mass percent can be calculated as follows:

Q: Christina measures out 9.92 grams of Sodium bromide, NaBr. How many moles would this be? (Be sure to…

A: Given, mass of NaBr = 9.92 g molar mass = 102.894 g mol-1 then, determine moles of NaBr =?

Q: Determine the percent composition of sulfur in sulfuric acid.

A: Percent composition of S = (mass of S/mass of H2SO4) x 100%

Q: Determine the number of moles of oxygen in 1.11 moles of calcium phosphate. (Give only the…

A: Given, The number of moles of oxygen in 1.11 moles of calcium phosphate is:

Q: Part A A hydrocarbon is a compound that contains mostly carbon and hydrogen. Calculate the percent…

A: In this question, we want to determine the percentage by mass of C and H in given Hydrocarbon C6H14…

Q: How many grams are in 7.8 mol of H2SO4. Round your answer to two decimal « Previous

A: Given  The molar mass of  H2SO4=98.079 g/mol. The molar mass of Fe          =55.845 g/mol. No. of…

Q: (a) 11. Average atomic mass in amu of one iron atam. 55.847 amu (ь) Using the amu, calculate the…

A:

Q: How many formula units are in 1.49 moles of Iron (I) Phosphate Answer with 3 decimals.

A:

Q: The formula and the molar mass for potassium dichromate are: K,Cr,0, and = 294.182 . How many oxygen…

A:

Q: Calculate the average molar mass of acetic acid based on your experimental results. Round your final…

A: Given: Concentration of acetic acid solution = 2.40 g/L   Trial-1 Trial-2 Initial buret reading…

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.