04/24/23

Stoichiometry question

what mass of KCl will be produced if 4.5g of Cl2 reacts with K?
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04/23/23

redox reaction of NO2 to NO3
For a particular redox reaction, NO−2 is oxidized to NO−3 and Ag+ is reduced to Ag. Complete and balance the equation for this reaction in basic solution. Phases are optional.balanced redox reaction:
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04/23/23

A 0.1375-g of solid mg is burned with a heat capacity of 3024 J/C. The temperature increases by 1.126 C. Calculate the heat given off by the burning Mg in kJ/g and in kJ/mol.

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04/23/23

A piece of silver of mass 362g has a heat capacity of 85.7 J/°C. What is the specific heat of silver?
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04/23/23

2CuS(s) + 3O2(g) --> 2CuO(s) +2SO2(g) ΔH = -805.6 kJ/mol. Calculate the heat evolved (in kJ) per gram of CuS roasted.
I don't really get how to solve this problem...
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04/23/23

If you start with 3.73 g of NH4NO3, how many grams of NH3 can you make?
2 NH4NO3 + Ca(OH)2 -> 2NH3 + 2 H2O + Ca(NO3)2
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04/23/23

If you mix 58.75 mL of 0.293 M AgNO3 with 40.34 mL of 0.91 M CaCl2, how many moles of AgCl can you make?
AgNO3 + CaCl2 --> AgCl + Ca(NO3)2
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04/23/23

If you mix 39.19 mL of 2.405 M AgNO3 with 48.91 mL of 0.924 M CaCl2, how many moles of AgCl can you make?
AgNO3 + CaCl2 --> AgCl + Ca(NO3)2
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04/23/23

Chemistry related question
The density of a gas is 1.96 g L-1 at 1.00 atm and 0 °C. What is the density of this gas at 0.855 atm and 25.0 C?(A)0.00276 g•L-1(B)0.651 g:L-1(C) 1.54 g.L-1(D) 1.82 g.L-1
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04/23/23

Can someone help me?
A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gaseous products. The cylinder has a piston that moves in or out, as necessary, to keep a constant... more
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04/22/23

Balance the equation in basic conditions. Phases are optional. equation: N_{2}H_{4} + Cu(OH)_{2} -> N_{2} + Cu
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04/22/23

May I get help on this please?

The quantity of antimony in an ore can be determined by an oxidation‑reduction titration with an oxidizing agent. The ore is dissolved in hot, concentrated acid and passed over a reducing agent so... more
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04/22/23

Can I get help on this please?
For a gaseous reaction, standard conditions are 298 K and a partial pressure of 1 atm for all species. For the reaction N2(g)+3H2(g)↽−−⇀2NH3(g) the standard change in Gibbs free energy is ... more
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04/22/23

Can I get help on this?
Calculate Δ𝐺∘ at 298 K for the reaction CS2(l)+3O2(g)⟶CO2(g)+2SO2(g) based on these reactions. C(s)+O2(g)⟶CO2(g)Δ𝐺∘=−397.28 kJ/mol S(s)+O2(g)⟶SO2(g)Δ𝐺∘=−300.19 kJ/mol ... more
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04/22/23

Chemistry related question

In which gas are the forces between molecules strongest?(A) Ne(B) CH4 (C) О2(D) H2O
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04/22/23

Chemistry related question

A lithium carbide (LixCy) reacts with water as follows:LixCy + H2O -> LiOH + C2H2 (unbalanced)What is the simplest formula of the carbide?(A) LiC(B) Li2C (C) LiC2 (D) Li3C4
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04/22/23

Chemistry related question

Why is the equation incorrect?Mg3 + N2 -> Mg3N2(A) Some of the subscripts are incorrectly used.(B) The equation is not balanced.(C) The valence of the nitride ion is incorrect.(D) The valance of... more
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04/22/23

Chemistry related question

Balance the equation for the reaction, using no fractional coefficients.? Сr2O3+ ? КОН +? О2 -> ? K2CrO4 + ? H2OThe coefficient of KOH in the balanced equation is(A) 2(B) 4(C) 6(D) 8(E)10
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04/22/23

CHemistryyyy pH
NH3 is a weak base (𝐾b=1.8×10−5) and so the salt NH4Cl acts as a weak acid. What is the pH of a solution that is 0.076 M in NH4Cl at 25 °C?
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04/22/23

Mg(OH)2 is dissolved in aq solution has a pH of 8.90 at 25 C. Fill Ice table.
Based off of Provide a equation to find the value of Ksp at 1.0 x 10^-31then find molar solubility of SMg(OH)2= M
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04/22/23

Chemistry Help Please
Calculate the pH and pOH of the solutions with the following hydrogen ion or hydroxide ion concentrations. Indicate whether the solutions are acidic, basic or neutral. Report your answers to 3 sig... more
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04/21/23

Solution calculation worksheet

Consider a solution of 50.0 g of sodium chloride dissolved in 250.0 mL of water. The resulting solution has a volume of 290 mL. Write a chemical equation that would describe the process of sodium... more
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04/21/23

Polar and non polar

N-H POLARC-O POLAR B-F POLARC-H NONPOLAR1) Determine whether the following substances are: ionic, polar covalent molecules, or non-polar For which of the compounds above (if any) would you expect... more
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04/21/23

Chemistry related question

Balance the equation for the reaction, using no fractional coefficients.?P+? HNO3 +? H2O -> ? H3PO4 + ? NOThe ratio of the moles of oxidizing agent to moles of reducing agent in the balanced... more
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04/21/23

Chemistry related question

Complete and balance the equation for the combustion of ZnS in excess oxygen? ZnS +? O2 -> ? ZnO + ?Use no fractional coefficients. The number of moles and the formula of the product containing... more
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