06/01/20

Help With Chem HW
To treat a burn on his hand, a person decides to place an ice cube on the burned skin. The mass of the ice cube is 11.0g, and its initial temperature is  -11.6 C. The water resulting from the... more
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06/01/20

Help With Basic Chem
The vapor pressure of ethanol, CH3 CH2 OH, at 30.0 C is 10.46 kPa. If 2.27 g of ethanol is enclosed in a 2.00 L container, how much liquid will be present?
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06/01/20

Help With Basic Chem
How much heat energy is required to boil 76.0 g of ammonia, NH3? The molar heat of vaporization of ammonia is 23.4 kJ/mol.𝑞= kJ
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06/01/20

Help With Basic Chem
A 59.90g sample of a substance is initially at 27.0 C.  After absorbing 1931 J of heat, the temperature of the substance is 157.9 C. What is the specific heat (c) of the substance?C=
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06/01/20

Help With Basic Chem
The heat of fusion for naphthalene is 0.148kJ/g.   Calculate the heat energy in joules required to melt 41.45 g of naphthalene.Heat Energy: J
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06/01/20

I need help with chemistry

I need help with knowing what is the product of baking soda and vinegar. What products can possibly form when methane gas reacts with oxygen gas from the air. Is methane gas and oxygen gas a... more
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06/01/20

10.0 mL of 0.0040 mol/L Pb(NO3)2 (aq) is added to 15.0 mL of 0.25 mol/L KCl(aq). If Ksp = 1.2x10^−5 for PbCl2 will a precipitate form?
10.0 mL of 0.0040 mol/L Pb(NO3)2 (aq) is added to 15.0 mL of 0.25 mol/L KCl(aq). If Ksp = 1.2x10^−5 for PbCl2 will a precipitate form?a)A precipitate will not formb)The system is at... more
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06/01/20

A student places 2.00 mol of Br2(g) in a 2.00L reaction flask and allows the gas to decompose to Br(g).

A student places 2.00 mol of Br2(g) in a 2.00L reaction flask and allows the gas to decompose to Br(g). At equilibrium, 0.064 mol of Br(g) is present in the flask. Calculate the equilibrium... more
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06/01/20

Consider the chemical system 2SO2(g)+O2(g)⇌ 2SO3(g)

Consider the chemical system 2SO2(g)+O2(g)⇌ 2SO3(g)The initial concentrations for this system were:[SO2] = 0.40 mol/L[O2] = 1.6 mol/L[SO3] = 29.7 mol/LThe equilibrium concentration of SO2(g)was 1.2... more
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06/01/20

The chemical reaction system represented by the equation below is at equilibrium with the concentrations shown.

The chemical reaction system represented by the equation below is at equilibrium with the concentrations... more
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06/01/20

How many moles of carbon are required to produce 30g CF4?

Chemistry equation about a balanced equation that has elements in a reaction what contains an amount of moles and grams.
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06/01/20

38.6 L to cm3 Express your answer using three significant figures.
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06/01/20

What is the mass, in grams, of 28.76 mL of acetone? Express your answer using four significant figures
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05/31/20

Long QuestionIf Possible please help.
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05/30/20

its chemistry :I
1.24g of Tin (III) fluoride is in a package of toothpaste decompose to Tin and Fluorine gas.By this reaction: 2SnF3 (s) -> 2Sn (s) + 3F2 (g)What volume of Fluorine gas will be produced at STP?
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05/30/20

Chemistry Sapling Learning
A Se atom has a mass number of 75. Determine the number of neutrons, protons, electrons in this neutral isotope.# of Neutrons:# of Protons# of Electrons
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05/29/20

8Fe+S8→8FeS If we begin with 293 g Fe and 17.2 g S8, how many grams of FeS will we create?
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05/29/20

rank these measurements in order: 1.0x10^-5 m, 2.0x10^-6 m, 3.0x10^-7m, 4.0x10^2mm, 0.0m, 1.0m
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05/29/20

25.0 grams of chlorine reacts with 29.0 grams of sodium 2Na+Cl2→2NaCl The theoretical yield is _____
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05/28/20

4 HF + O2 --> 2 F2 + 2 H2O If 2.390 x 1026 molecules of HF react how many grams of Fluorine is produced? If the same 2.390 x 1026 molecules of HF react how many liters of H2O are produced?

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05/28/20

SiO2 + 4 HF --> SiF4 + 2 H2O Given 15.0 mol HF, how many moles of H2O will be produced? If the same 15.0 mol HF reacts how many grams of SiF4 will be produced?

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05/28/20

C3H8 + 5O2 --> 4H2O + 3CO2 If 200. g of propane is burned, how many g of H2O are produced?
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05/28/20

C3H8 + 5O2 --> 4H2O + 3CO2 If 200. g of propane is burned, how many g of H2O are produced?
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05/28/20

2 AgNO3 + BaCl2 --> 2 AgCl + Ba(NO3)2 If you start with 25.00g of BaCl2 how many grams of AgCl will you end up with? (Assuming excess silver nitrate)
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05/27/20

Stoichiometry Grams to Grams

2 Fe2O3 + 3C —> 4 Fe + 3CO21) How many grams of Fe will be produced if 39.64 grams of CO2 are used ?2) How many grams of FeO2 are used if 2.88 grams of Fe are produced ?
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