1.) The energy change in a chemical reaction comes from a change in mass. Calculate the mass change when 1 mol of methane undergoes combustion. (don't forget to convert energy to joules and 1] = 1) CH, (g) +2 02 (g) CO2 (g) + 2 H,0 (g) AHn = -802.35 mol

Q: Some salts have water of hydration and are called hydrated salts. A 3.216 g sample of a hydrated…

A: Step‐1       Given,       mass of hydrated salt  Nax By Oz .X H2O=3.216g       mass of  anhydrous…

Q: If 2 moles of water decomposes, the products that will form are 2 moles of hydrogen gas and one mole…

A: Given, Moles of water decomposed = 2 moles.

Q: Lithium has two stable isotopes, 6Li and 7Li. If a sample is composed of 48.0% of the lighter…

A: Average mass of an element is defined as the atomic mass of the element calculated by multiplying…

Q: 6. A solid circular cone made of pure platinum (d = 21.45 g/cm³) has a diameter of 2.75 cm and a…

A: To calculate mole=mass/molar mass For Calculate electron  78electron present in 1 atom of platinum…

Q: Caproic acid, which is responsible for the foul odor of dirty socks, is composed of C, H and O…

A: Given,0.450g sample produces 1.024 g of CO2  and 0.418 g of water.

Q: The reaction between potassium chlorate and red phosphorus takes place when you strike a match on a…

A:

Q: Consider the balanced reaction 6 A + 5 B → 7 C + 7 D. If 6.65 moles of D (MW = 29.59) are produced,…

A:

Q: 1- Alum used in cooking is potassium aluminum sulfate hydrate, KAl(SO4)2. XH2O. To find the value of…

A:

Q: How many grams of aluminum are there in 4.05 x 10²5 molecules of Al½O3?

A: Given:- number of molecules of Al2O3 = 4.05 × 1025 molecules  To calculate :- mass of Al in grams

Q: 5. In a 3.7-gram sample, there are (A) 1.1 x 1022 atoms of gold (B) 3.2 x 1025 atoms of gold (C) 4.4…

A: Number of Mole-Ratio of given mass of substance to the molar mass of substance is called number of…

Q: A) Chlorophyll molecules are responsible for the green pigmentation of plants. Differing chemically…

A: Given that : 1 molecule of chlorophyll X contains 4 N atoms. % nitrogen by weight = 6.26 %

Q: Suppose you want to know the formula of a hydrate of barium thiocyanate. If you heat 1.089 g of the…

A:

Q: 2.90 grams of phosphorus is burned in the presence of oxygen and forms 5.14 grams of a phosphorus…

A: We can just subtract the mass of the phosphorus from the mass of phosphorus oxide and get mass of…

Q: experiment was done to determine the composition of a mixture of sodium chloride and sodium…

A:

Q: Calculate (a) the number of atoms in 1.05 × 10−6 mole of helium and (b) the number of moles of…

A: a.

Q: Consider the balanced reaction 5 A + 5 B → 2 C + 5 D. If 6.026 grams of C (MW = 29.63) are…

A: A numerical problem based on mole concept, which is to be accomplished.

Q: 1.Aluminum reacts with oxygen to produce aluminum oxide (Al203). The balanced chemical equation for…

A:

Q: Provide the chemical formula (including brackets where appropriate) or systematic name for the…

A: Given : Number of molecules of molecular chlorine = 5 x 1023

Q: Matter is neither created nor destroyed in a chemical reaction. Thus, the mass of the products of a…

A:

Q: 4. Given the balanced equation representing a reaction: 2 Na(s) + Cl, (g) – 2 NaCI(s) + energy If 46…

A:

Q: O Hydrated magnesium phosphate has the formula Mg,(PO.),-yH,O. A sample of this compound contains…

A:

Q: A student weighs a sample of carbon on a balance that is accurate to 0.001 g. (a) How many atoms…

A: The mass of carbon (C) is 0.001 g and the molar mass is 12.01 g. The no of moles of C are:  n = 0.01…

Q: The energy released when 1.08 mol of lead (II) bromide is formed from its elements is?

A:

Q: Q. 1) Complete and balanced the following chemical equations. Assume complete reaction and indicate…

A: Chemical reactions are those reactions which undergo any chemical change. Chemical reaction is…

Q: The following reaction is to be used in a carbon sequestration process: CaSiO3 + CO2 → CaCO3 + SiO2…

A:

Q: Lithium nitride reacts with water to produce ammonia and lithium hydroxide according to the equation…

A: Given;

Q: Consider the balanced reaction 7 A + 6 B → 4 C + 3 D. If 8.511 grams of A (MW = 42.34) are…

A: The balanced reaction taking place is given as, => 7 A + 6 B --------> 4 C + 3 D Given : Mass…

Q: 2.43 g magnesium was completely burnt in oxygen to give magnesium oxide. 2 Mg(s) + O2(g) → 2 MgO(s)…

A: Answer: This question is based on the stoichiometric calculation from the chemical equation.

Q: Consider the balanced reaction 6 A + 5 B → 7 C + 6 D. If 2.657 moles of C (MW = 27.37) are…

A: 6 A + 5 B → 7 C + 6 D Molecular weight of C = 27.37 g mol-1 Moles of C = 2.657 mol Molecular weight…

Q: Ammonium perchlorate (NH, CIO,) is the solid rocket fuel that was used by the U.S. Space Shuttle and…

A: Balanced chemical equation is The given mass of ammonium perchlorate = 3.73 gThe mass of oxygen…

Q: It would be really hard to measure the mass of the foam explosion. How does knowing the amount of…

A: The foam explosion experiment involves mixing hydrogen peroxide, soap and food colouring dye before…

Q: Consider the balanced reaction 7 A + 7 B → 5 C + 7 D. If 9.712 moles of C (MW = 47.32) are…

A: Given, Chemical Reaction: 7 A + 7 B → 5 C + 7 D. Moles of C = 9.712 moles Molar mass of C = 47.32…

Q: Ammonium perchlorate (NH4CIO4) is the solid rocket fuel that was used by the U.S. Space Shuttle and…

A: 1st) Identify balanced chemical equation:2nd) Calculating number of moles of O2:         Moles =…

Q: If the same amount of electricity that is used to produce 500 g copper metal (Cu Cu") is used to…

A:

Q: Some salts have water of hydration and are called hydrated salts. A 3.216 g sample of a hydrated…

A: In this question initially, a number of moles of each element will be calculated. Then the smallest…

Q: Suppose 8.60 g of CH4CH4 is allowed to burn in the presence of 17.00 g of oxygen. How much (in…

A: Given that 8.60 g of methane reacts with oxygen to form carbondioxide and water . Number of moles of…