10. A sample of chemical X is found to contain 5.0 grams of oxygen, 10.0 grams of carbon, and 20.0 grams of nitrogen. The law of definite proportions would predict that a 72 gram sample of chemical X should contain how many grams of carbon? A. 5.0 grams B. 7.2 grams C. 11 grams D. C 15 grams 21 grams

Q: Find the pH for the following solutions if it contains: a.) 1.8 x 10^-6 M Barium hydroxide b.) 0.027…

A: a.) Barium hydroxide is a strong base , so we would first Calculate concentration of OH- and then…

Q: 3P4 + 20NO3- + 8H2O + 8H+ → 12H2PO4- + 20NO From the balanced equation, how much AgNO3 is needed in…

A: Given balanced equation is  3 P4 + 20 NO3- + 8 H2O + 8 H+ → 12 H2PO4- + 20 NO a) We need to find how…

Q: If 0.419 Liters of water is added to a 30.0 mL of 17.4 M stock solution of acetic acid (CH3COOH),…

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Q: TOPIC: REACTIONS AND ANALYSIS OF GROUP I CATIONS Why must a large excess of chloride ion be avoided…

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Q: Given the data from below, fill up the missing data: Table 3.1. The different runs for the effect of…

A: Total volume after the mixing of beaker-A and B in each Run = 10.0 mL + 0 mL + 5.0 mL + 5.0 mL + 5.0…

Q: What is the mass (grams) of salt in 10.0 m³ of ocean water? (1 mol salt = 58.44 g salt, 1 L ocean…

A: Given: 1 mol salt = 58.44 g salt 1 L ocean water = 0.60 mol salt We have to find the mass (in grams)…

Q: Ive read the honor code and it says that their a question can have up to 3 subparts (i.e. part a, b,…

A:

Q: Show that the mass energy of 1 amu = 931.5 MeV. (no rounding here, get it exactly)

A: E=mc2..............Einstein's mass energy formula where m = mass defect =  1amu = 1.67 x 10^-27 kg…

Q: ill in the blanks: NO3 Nitrogen has the same oxidation number in all of the following except: C.…

A: The oxidation number of hydrogen is + 1.       Usually the oxidation number of oxygen is -2.  The…

Q: Fill in the blanks: is a state that exists when two bodies that are in contact with each other no…

A: We know that ,heat transfers from hot body to cold body until they reaches the same temperature.

Q: The reaction C₂H₂(g) →2C₂H₂(g) has an activation energy of 262 kJ/mol. At 600.0 K, the rate…

A:

Q: Consider the reaction, 2AB2(g) = A2(g) + 2B2(g), Kc = 0.263 at 25°C. The reaction begins with an…

A:

Q: Which of the following molecules or ions CANNOT act as a chelate? Select one: O a. phenanthroline…

A: Monodentate ligand means ligand have only one donar atom whereas polydentate means ligand have more…

Q: For hexane, what is the bond length? Are all C—C bonds the same length?

A: Organic chemistry is a branch of chemistry that deal with organic compounds. Organic compounds are…

Q: A substance having a mass 1.5 g is burned in a bomb calorimeter. The temperature started at 20.2 °C…

A: This instrument is used for the measurement of the amount of heat involved in a reaction. It usually…

Q: The hardness of water (hardness count) is usually expressed in parts per million (by mass) of CaCO3.…

A: Note: " Since you have asked multiple questions, we will solve the first question for you. If you…

Q: membrane of the bacteria? O Alkaline pH O RNAsel O High salt concentration O Detergents (e.g. sodium…

A: A buffer is a solution that resist the change in pH upon the addition of an acidic or basic…

Q: For the following reaction, 21.9 grams of iron are allowed to react with 5.22 grams of oxygen gas.…

A: Given -> Weight of iron = 21.9 gm  Weight of O2 = 5.22 gm

Q: Balance the equation XCI2(aq) + AgNO3(aq) + X(NO3) 2(aq)+ AgCI(s)

A:

Q: Which of the following molecules have a hydrogen with a pk, value between 20 and 25? O O OH NH₂ -H H…

A:

Q: c

A: No, this molecule is not suitable for confirmational analysis. There must be two tetrahedral carbon…

Q: 114 How many protons, neutrons, and electrons does a 47 Au atom have?

A: Since, For the given notation of the element, Number of proton = Atomic number Number of neutron =…

Q: A student, Ken, is given a mixture containing two carbonate compounds. The mixture includes  MgCO3…

A:

Q: What will be the boiling point and freezing point of the solution when 258 g of sucrose (C12H22011)…

A: 258 g of sucrose C12H22O11 is dissolved in 855 mL of water .We have to calculate the boiling point…

Q: 1. Consider this item as ideal gas: A rigid tank containing 3 lb of gaseous mixture of nitrogen,…

A: A. If V is the volume of container in litres, then initial volume of N2 in container will be 0.33V…

Q: Temperature does not depend on size or type of object

A: Extensive property is a property of the substance that is independent of the type of substance &…

Q: A complete combustion of octane, C8H18, a component of gasoline, proceeds as: C8H18(l ) +   O2(g)  →…

A:

Q: The percent by mass of phenol (MM = 94.11 g/mol) in an aqueous solution is 10.9%. What is the…

A:

Q: In this question you will use the one-dimensional particles in a box model to approximate the…

A: Given: C-C/C=C bond length = 0.14 nm C-N/C=N Bond length = 0.13 nm   To find out: 1. Length of the…

Q: 17) For C6H10Br2, draw and name (using the IUPAC system for naming, E/Z, cis/trans) 25…

A:

Q: A can of Coke contains 42 grams of: a. Sugar b. Starch  c. Fat d. Protein

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Q: Assume that a certain element (let's call it X) has two (and only two) isotopes: 35x (35.0 a.m.u.)…

A: Given data :

Q: Fill in the blanks Choose below the correct coefficients of the substances, respectively. NH3 (g) +…

A: Given the reaction is, NH3 +O2---‐>N2 +H2O we have to balance this reaction.

Q: Write the full ground-state electron configuration for each element.   (a) S:       (b) Kr:…

A: Answer:  Electronic configuration refers to the ways in which electrons are arranged into various…

Q: Calculate the number of molecules present in 33.4 grams of CaSO4.

A:

Q: https://app.101edu.co TARTING AMOUNT ADD FACTOR 0.333 Determine the quantity of moles in 1.81 x 1024…

A: Given ->  Number of atoms of Na = 1.81 × 1024 atoms

Q: What were the instruments used in preparing the four newest elements? Nihonium, Moscovium,…

A: The elements nihonium, moscovium, tennessine, and oganesson with atomic numbers 113, 115, 117, and…

Q: Reaction b: H₂ H3C-C-CH3 + F₂

A: Given: CH3CH2CH3 + F2 ------->

Q: Which pka value best represents the indicated hydrogen? H I I H O 20 O 15 O none of these O 10 O 25

A:

Q: A substance having a mass 1.5 g is burned in a bomb calorimeter. The temperature started at 20.2 °C…

A:

Q: Using this website, draw the best resonance structure for the molecule shown (it has to be different…

A:

Q: 6) Which of the following has the highest hydroxide ion concentration? 0.1 M HCI 0.1 M H₂SO4 a…

A:

Q: Complete and balance the following redox equation. What is the coefficient of H₂S when the equation…

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Q: tions are available, the first contains 5 wt.% ethanol, and the second contains 25 wt. % w much of…

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Q: Question 24 of 26 Fill in the blanks: Al2(SO4)3(aq) + KOH(aq) Al(OH)3(aq) + K2SO4(aq) A) 1,3,2,3 B)…

A: Given :

Q: What is the oxidation number of Carbon in magnesium bicarbonate, Mg(HCO3)2? +4 0 +5 +1 -2

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Q: Which of the following substituted cyclohexanes is most stable?

A: The given cyclohexanes are substituted with methyl group. The methyl groups in anti position are far…

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Q: Give the molar concentration of HCl with a specific gravity of 1.18 and 37.0% (w/w) purity (MM=36.5…

A:

Q: A valid resonance structure for a cation is shown below. Which of the following is/are additional…

A:

Introduction to chemistry

Chemistry is a branch of science that deals with the analysis of material and the substances that comprise it. It also manages the properties of these substances and their reactions to form new substances. It is basically centered on particles and atoms that make up components and mixtures. These chemical species will in general connect using bonds.