Question
In: Chemistry
1. The thermite reaction is performed using 8.6g Fe2O3 and 1.8g powdered Al metal/ a. Which...
1. The thermite reaction is performed using 8.6g Fe2O3 and 1.8g powdered Al metal/
a. Which reactant is the excess?
b. How many grams of excess reactant are left over?
c. How many grams of aluminum oxide can be produced?
2. The reaction of 5.0g of CuSo4 with excess sodium hydroxide produced 2.6g of Cu(OH)2. What percent yield of Cu(OH)2 was obtained?
3. Approximately 46.4 grams of sodium acetate (82.0 gm/mol) will dissolve in 100 grams of water at 20 degrees Celcius. If 2.75 mol NaCH3COO is dissolved in 355 g of water, the solution will be:
A. dilute
B. concentrated
C. saturated
D. supersaturated
4. Answer the following as true or false:
A. NaCl(aq) has a greater surface tension from H20
B. CH4 is more polarizable than CBr4
C. C12H6 is more viscous than C5H12
D. Compared to methanol, Bromine is more soluble in hexane.
E. Water rises in a capillary tube due to the fact that cohesive forces between the water molecules are stronger than the adhesive forces between water and the glass.
Solutions
queen_honey_blossom answered 2 years agoRelated Solutions
For the below unbalanced equations: 1. Fe2O3 + Al → Fe + Al2O3 If at the...
For the below unbalanced equations:
1. Fe2O3 + Al → Fe + Al2O3
If at the beginning of the reaction
you used 25.29 g Fe2O3 and 9.85 g Al, what is the theoretical yield
(in grams) of Al2O3 (you will need to find the limiting reagent and
then the theoretical yield of Al2O3 from this reagent)?
2. C6H6 +
O2 → CO2 +
H2O
If at the beginning of the reaction
you used 9.92 g C6H6 and 9.85 g O2, what is...
1.The reaction of aluminum metal (Al) with oxygen (O2) forms Al2O3. Write a balanced equation for...
1.The reaction of aluminum metal (Al) with oxygen (O2) forms
Al2O3. Write a balanced equation for this redox reaction. Write two
half reactions to show how many electrons are gained or lost by
each species.
Redox Reaction:
Oxidation Reaction:
Reduction Reaction:
2. Be sure to answer all parts. Hydrocarbons are compounds that
contain only C and H atoms. When a hydrocarbon reacts with O2, CO2
and H2O are formed. Write a balanced equation for the combustion of
the following hydrocarbon,...
Which metal can react with an acid? Cu, Ag, Al, Au (Answer is Al) Can someone...
Which metal can react with an acid? Cu, Ag, Al, Au (Answer is
Al) Can someone explain why?
Which of the following is the most likely to act as a Lewis
Acid? PH3, AlCl3, HCN, BeO2 (Answer is AlCl3) Can someone explain
why? Im assuming its because AlCl3 does not have a longe pair to
donate while the rest do?
1) Calculate the enthalpy of reaction (ΔHrxn) for the following reaction: Fe2O3(s) + 3 CO(g) →...
1) Calculate the enthalpy of reaction
(ΔHrxn) for the following
reaction:
Fe2O3(s) + 3 CO(g) → 2 Fe(s) + 3 CO2(g)
Given: 4 Fe(s) + 3 O2(g) → 2 Fe2O3(s) ΔH = –1648 kJ 2
CO2(g) → 2 CO(g) + O2(g) ΔH = +565.4 kJ
2) Use standard enthalpies of formation to calculate the
standard enthalpy of reaction for the following
reaction:
2 H2S(g) + 3 O2(g) → 2 H2O(l) + 2 SO2(g)
ΔH∘rxn
If you need 1.00x10^3 kcal of heat, how many grams of Al and Fe2O3 are needed?...
If you need 1.00x10^3 kcal of heat, how many grams of Al and
Fe2O3 are needed? (8 Al, 1 Fe2O3)
. An experiment was performed on a certain metal to determine if the strength is a...
. An experiment was performed on a certain metal to determine if
the strength is a function of heating time (hours). Results based
on 20 metal sheets are given below. Use the simple linear
regression model.
∑X = 40
∑X2 = 200
∑Y = 80
∑Y2 = 1120
∑XY = 460
Find the estimated y intercept and slope and write the equation of
the least squares regression line. Estimate Y when X is equal to 3
hours. Also determine the...
. An experiment was performed on a certain metal to determine if the strength is a...
. An experiment was performed on a certain metal to determine if
the strength is a function of heating time (hours). Results based
on 25 metal sheets are given below. Use the simple linear
regression model. ∑X = 50 ∑X2 = 200 ∑Y = 75 ∑Y2 = 1600 ∑XY = 400
Find the estimated y intercept and slope. Write the equation of the
least squares regression line and explain the coefficients.
Estimate Y when X is equal to 4 hours....
a. An experiment was performed on a certain metal to determine if the strength is a...
a. An experiment was performed on a certain
metal to determine if the strength is a function of heating time
(hours). Results based on 25 metal sheets are given below. Use the
simple linear regression model.
∑X = 50
∑X2 = 200
∑Y = 75
∑Y2 = 1600
∑XY = 400
Find the estimated y intercept and slope. Write the equation of the
least squares regression line and explain the coefficients.
Estimate Y when X is equal to 4 hours....
1. If the reaction below was performed in a lab within a 1 L vessel and...
1. If the reaction below was performed in a lab within a 1 L
vessel and showed to produce 1.550 mol of HI while leaving 0.225
mol of H2 and 0.225 mol of I2 remaining.
H2(g) + I2(g)
⇌2HI(g)
a.Calculate the standard free-energy change for the reaction at
458°C.
2. Use the chemical equation below to answer the following
questions.
Ca(s) + Cl2(g)
Ca2+ (aq) + 2 Cl-(aq)
a.Write the cell notation for this equation.
b.What is the half-cell reaction...
balance the following reaction Mn + Al^+3-----> Mn^+2 + Al
balance the following reaction Mn + Al^+3-----> Mn^+2 +
Al
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