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Get college assignment help at uniessay writers What mass of helium, in grams, is required to fill a 7-L balloon to a pressure of 1.05 atm at 24 degrees C?

When 7 mL of a solution containing 2.5 M AlBr3 is

When 7 mL of a solution containing 2.5 M AlBr3 is diluted to 30 mL, a dilute solution is formed. What is the Br- concentration in 15 mL of the dilute solution?

what was henry mosley thinking

what was henry mosley thinking

Draw CI by placing atoms on the grid and connecting them

Draw CI by placing atoms on the grid and connecting them with bonds. Do not identify the charge on each of these species. Include all lone pairs of electron

Calculate the number of grams of AlCl3 and the number of

Calculate the number of grams of AlCl3 and the number of grams of H2O formed when 0.500 g of Al(OH)3 reacts.

What are two ways to draw the lewis dot structures for

What are two ways to draw the lewis dot structures for C3H6O

calculate the change in internal energy for a system that is

calculate the change in internal energy for a system that is giving of 25.0 kJ of heat and is changing from 12.00 L to 6.00L in volume at 1.50 atm pressure.

What volume of 18.0M concentrated sulphuric acid is required to make

What volume of 18.0M concentrated sulphuric acid is required to make 500.0mL of 1.00M aci

Which statement best summarizes the general nature of investigations during the

Which statement best summarizes the general nature of investigations during the 1800s related to the acquisition and development of knowledge concerning the atomic structure of matter?’ 1. Qualitative observations, although often influenced by ideas related to magic and mysticism, provide glimpses of the structure of matter. 2. Quantitative measurements, particularly those related to mass, lead to the formulation of fundamental laws leading to an atomic theory of matter. 3. The development and use of electrical probes to study matter lead to experimental evidence for the existence of subatomic particles in atoms. 4. The use of new experimental and mathematical techniques provide information concerning the organization of subatomic particles in atoms.

the central oxygen atom in {rm{O}}_3 If there is more than

the central oxygen atom in {rm{O}}_3 If there is more than one answer, separate them by commas.

A calorimeter contains 22.0 of water at 13.5. When 2.10 of

Get college assignment help at uniessay writers A calorimeter contains 22.0 of water at 13.5. When 2.10 of (a substance with a molar mass of 62.0 ) is added, it dissolves via the reaction and the temperature of the solution increases to 26.0. Calculate the enthalpy change, , for this reaction per mole of . Assume that the specific heat and density of the resulting solution are equal to those of water [4.18 and 1.00 ] and that no heat is lost to the calorimeter itself, nor to the surroundings

Use the data given below to complete the table for an

Use the data given below to complete the table for an example of this titration. Data Table. Titration of Hydrogen Peroxide with Potassium Permanganate Trial 1 concentration of MnO41- 0.044 M volume H2O2 solution 5.00 mL mass H2O2 solution 5.015 g vol of MnO41- 14.90 mL mmol of MnO41- 2 mmol mmol of H2O2 3 mmol mass of H2O2 4 g mass % of H2O2 in the original sample 5 % molarity of H2O2 in the original sample 6 M

question no 3

question no 3

If 3.8 is released by combustion of each gram of glucose,

If 3.8 is released by combustion of each gram of glucose, how many kilocalories are released by the combustion of 1.10 of glucose?

Dot formula for CH3NCS

Dot formula for CH3NCS

you need 70.2 kj to raise the temperautre of 34.0g of

you need 70.2 kj to raise the temperautre of 34.0g of ammonia, NH3(G), from 23.0 degrees celcius to 24.0 degress celsius. Calculate the specific heat of ammonia

What is the density (in g/L) of hydrogen gas at 24.0C

What is the density (in g/L) of hydrogen gas at 24.0C and a pressure of 1660 psi?

A 3.00 gram peanut is burned in a bomb calorimeter containing

A 3.00 gram peanut is burned in a bomb calorimeter containing 1100 grams of water. The temperature of the water rises from 25.00 C to 30.25 C. What is the heat change in Calories

Which is true of Al 3 ? a. It is a cation

Which is true of Al 3 ? a. It is a cation b. It is an anion c. It is missing 2 electrons d. It is a noble gas e. It has three extra electrons

Balanced Equation: ____Fe2O3 ___Al =>____ Fe _____Al2O3 1. How

Balanced Equation: ____Fe2O3 ___Al =>____ Fe _____Al2O3 1. How many grams of Al are needed to completely react with 135 g of Fe2O3? 2. How many grams of Al2O3 can form when 23.6 g Al react with excess Fe2O3? 3. How many grams of Fe2O3 react with excess Al to make 475 g Fe? 4. How many grams of Fe will form when 97.6 g Al2O3 form?

2. The formal charges on the boron and Hydrogen atoms in

2. The formal charges on the boron and Hydrogen atoms in borane, BH3, are respectively a. -1 and 0 b. 3 and -1 c. 2 and 0 d. 0 and 0 e. 3 and 1

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