In the laboratory, a student weighs out 0.0852 g of cobalt on balance. How many atoms of cobalt (Co)are in this sample? Select one: O 4.165 x 1026 atoms O 3.024 x 1024 atoms O 0.001446 atoms O 8.706 x 1020 atoms

Q: Antimony is alloyed with lead to increase the rigidity of components used in the construction of…

A:

Q: If 6.1 × 10²⁵ molecules of CO₂ are produced in a combustion reaction, what is the mass in kg of CO₂…

A: Given: 6.1 × 10²⁵ molecules of CO₂ are produced in a combustion reaction.  To determine : The mass…

Q: A molecule has the formula Na₂SOx, where X is a number of oxygen atoms. If the molar mass of the…

A: The number of molecules or atoms present in the one mole of the substance is equal to the Avogadro…

Q: Part 1: Calculate the mass percentage of N in N2O4. Report your answer to 3 significant figures.…

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Q: Suppose a piece of silver jewelry contains 7.78×1022 atomsatoms of silver (AgAg).

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Q: How many CO2 molecules are there in 12.0 moles CO2?   How many moles NH3 contains 1.5 x 10 23 NH3…

A: a) Given : Number of moles of CO2 = 12.0 mol.

Q: Ethanol has a molecular formula C2H5 A sample of ethanol has a mass of 2.3 grams. The sample was…

A:

Q: Consider the reaction of solid P₄ and chlorine gas to form gaseous phosphorus trichloride. The…

A: The reaction given is P₄(s) + 6 Cl₂ (g) → 4 PCl₃ (g)

Q: Consider the reaction of solid P4 and chlorine gas to form gaseous phosphorus trichloride. a) Write…

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Q: Zinc phosphate is used as a dental cement. A 50.00-mg sample is broken down into its constituent…

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Q: e composition of a given substance is as follows: 3.5 mol C, 2.52 g H, 24.0 g O, 01 x1023 atoms of…

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Q: Consider the following reaction: 4 NH3(g) + 5 O2(g) → 4 NO(g) + 6 H2O(g) If 3.60 g NH3 and 5.40 g O2…

A: The answer is as follows:

Q: For the following reaction, 17.1 grams of chlorine gas are allowed to react with 54.4 grams of…

A:

Q: the mineral gibbsite has the formula al(oh)3. what mass in,in kg, of al is present in 2.9 kg of…

A: Given, mass of gibbsite,  Al(OH)3  = 2.9 kg = 2900 g Thus, moles of gibbsite can be calculated as,…

Q: How many grams are there in 6.5 X 10^25 molecules of CO2?

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Q: The empirical formula of a compound is X5Y7Q by mass and the molecular formula weighs 162.1 g/mol.

A: Let us the consider the actual molecular formula as (X5Y7Q)n. Then,n x ( 12.01*5 + 16*7 + 14.01) =…

Q: A sample contained a mixture of CoS and CdS. The amount of CoS was determined by reacting 7.701 g of…

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Q: What is the mass in grams of 5.00 x 10¹2 H₂O molecules?

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Q: A chemist weighs 50.0 grams of solid Mg(OH)2. How many moles of Mg(OH)2 are in the sample? How…

A: Given :-  Amount of Mg(OH)2 = 50.0 g  To Calculate :-  No.of moles of Mg(OH)2  No.of formula units…

Q: In a chemical reaction, sulfur goes through a combustion reaction and produces sulfur trioxide as a…

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Q: Lithium faces an increasing demand since the alkali metal is a key component in a lithium- ion…

A: Given  Number of moles of lithium = 5.40 mol we have to calculate the weight of lithium. Molar mass…

Q: A balloon filled with neon gas, Ne, contains 9.870 x 1025 atoms. Use the molar mass of neon, 20.18…

A: Given,number of atoms of neon ( Ne ) gas = 9.870 x 1025 atomsmolar mass of Ne = 20.18 g/mol

Q: A 3.859 g sample containing impure CuCl2· 2 H20 was heated to constant mass. The sample mass after…

A: The impure sample of CuCl2.2H2O heating to drive off all the water then the mass of the mixture is…

Q: A certain organic acid contains 26.68 % carbon, 2.24 % hydrogen, and 71.08% oxygen by mass. A 0.050…

A:

Q: When 145 g of MnCl₂ × nH₂O is heated, 92 g of the anhydrous compound is obtained. Find the number n…

A: Here n is number of moles of H2O, given that the mass of water = 92g

Q: molecules of CO2

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Q: Consider the following reaction: 2 Al + 3 CuCl2 → 3 Cu + 2 AlCl3 Assuming 50.88 g of Al are…

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Q: Calculate the number of moles in 0.48 g of copper. O 0.033 mol O 1.3 × 102 mol O 7.6 x 10-3 mol O…

A: The objective of the question is to calculate the moles of copper.

Q: %3D The mass of 2.21 x 1040 atoms of iron (molar mass = 55.845 g/mol) is O 2.78 x 104 g. 2.05 x 102g…

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Q: e you have two samples that are equal in weight, 19.3g Ag and 19.3 g Al2O3 . Calculate the number of…

A: A Moles is defined as the mass of the substance which consists of the equal quantity of basic units.…

Q: The reaction 2 Sb + 3 Cl2 → 2 SbCl3 has an 88.3% yield. If 4.93 g of SbCl3 is desired, what mass of…

A: The reaction is given as, 2 Sb + 3 Cl2 →2 SbCl3Yield (%) = Actual YieldTheoretical Yield x 100

Q: A given compound is analyzed and found to contain only C, H and O. When a 35.79 g sample of this…

A: Given,

Q: A sample of limestone and other soil materials was heated, and the limestone decomposed to give…

A: We know that Molar mass of CO2=44g/mol Mass of CO2=2.14g Moles of CO2=MassMolar mass…

Q: P4(s) + 6Cl2(g) → 4PCl3(l) Given an initial mass of 19.14 g P4, an excess of Cl2, and assuming that…

A: Given-> Weight of P4 = 19.14 gm

Q: Imagine that you perform a combination reaction between 60.0 g of sodium metal (Na) with 10.0 g of…

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Q: If 100. g of iron were reacted with 100.g of oxygen according to the reaction below, the maximum…

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Q: A manufacturing process has a calculated yield of 2.87 kg of lithium hydroxide based on the reaction…

A: The objective of the question is to find the actual yield of lithium hydroxide from a manufacturing…

Q: Consider the following balanced chemical reaction: N2 (g) + 3 H2 (g) → 2 NH3 (g) What is the…

A: Given: Mass of N2 = 9.36 g Mass of H2 = 4.92 g Known: Molar mass of N2 = 28 g/mol Molar mass of H2 =…

Q: Disulfur dichloride, which has a revolting smell, can be prepared by directly combining Så and Cl₂,…

A:

Q: An impure sample of table salt (NaCl) that was dissolved in water and treated with silver nitrate to…

A: Mass of the impure sample = 1.741 g  Mass of AgCl formed = 4.084 g

Q: A mass of 2.50 g of hydrated copper (II) sulfate is placed in a crucible and heated. On heating,…

A: The given values in the question are:Mass of hydrated copper (II) sulfate = 2.50 gMass of anhydrous…

Q: The formula for alum is KAl(SO4)2  x 12 H2O. All of the atoms in this formula contribute to the…

A: Formula for alum  KAl(SO4)2 . 12 H2O formula mass of alum = 474.39 gmol molar mass of aluminium…

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.