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The meals-ready-to-eat (MREs) in the military can be heated on a flameless heater. You can purchase...
The meals-ready-to-eat (MREs) in the military can be heated on a flameless heater. You can purchase...
The meals-ready-to-eat (MREs) in the military can be heated on a
flameless heater. You can purchase a similar product called “Heater
Meals”. Just pour water into the heater unit, wait a few minutes,
and you have a hot meal. The source of energy in the heater is the
exothermic reaction of magnesium with water:
Mg(s) + 2 H2O(ℓ) → Mg(OH)2(s) +
H2(g)
ΔHf° (kJ/mol)
Mg(s)
0
Mg(OH)2(s)
–924.5
H2O(ℓ)
–285.8
H2(g) ...
Question 13 4 pts The meals-ready-to-eat (MREs) in the military can be heated on a flameless...
Question 13 4 pts The meals-ready-to-eat (MREs) in the military can be heated on a flameless heater. You can purchase a similar product called "Heater Meals”. Just pour water into the heater unit, wait a few minutes, and you have a hot meal. The source of energy in the heater is the exothermic reaction of magnesium with water: Mg(s) + 2 H2O(l) + Mg(OH)2(s) + H2(g) AH° (kJ/mol) Mg(s) 0 Mg(OH)2(s) -924.5 H2011) -285.8 H2(g) 0 Calculate the mass, ing,...
please HEP on those 2 questions Question 13 4 pt The meals-ready-to-eat (MREs) in the military...
please HEP on those 2 questions
Question 13 4 pt The meals-ready-to-eat (MREs) in the military can be heated on a flameless heater. You can purchase a similar product called "Heater Meals". Just pour water into the heater unit, wait a few minutes, and you have a hot meal. The source of energy in the heater is the exothermic reaction of magnesium with water: Mg(s) + 2 H2011) + Mg(OH)2(s) + H2(g) AH° (kJ/mol) Mg(s) 0 Mg(OH)2(s) -924.5 H2010) -285.8...
[8 marks] 1. The meals-ready-to-eat (MREs) in the military can be heated on a flameless heater....
[8 marks] 1. The meals-ready-to-eat (MREs) in the military can be heated on a flameless heater. The source of the heat energy is the reaction shown below: Mg(s) + 2 H2O(1) ► Mg(OH)2() + H2(g) Mg(OH)2(s) H2O(1) Mg(s) H2(g) AHºr (kJ/mol) -924.54 -285.83 0 0 b) How much heat (9), in J, is released when 4.25 g of Mg is reacted according to the equation above?
7.71 Ready-to-eat meals used by military personnel and campers can be heated on a flameless heater....
7.71 Ready-to-eat meals used by military personnel and campers can be heated on a flameless heater. The source of energy in the heater is the reaction repre- sented by Mg(s) + 2 H2O(0) - Mg(OH)2(s) + H2(g) Calculate the standard enthalpy change at 25 °C for this reaction. What quantity of magnesium is needed to supply the heat required to warm 25 mL of water (d = 1,00 g mL-') from 25 °C to 85 °C?
You have the six pieces of metal listed below, plus a beaker of water containing 300...
You have the six pieces of metal listed below, plus a beaker of water containing 300 g of water. The water temperature is 21.0°C and its specific heat is 4.184 J/g.°C. Metal Specific heat (J/g.°C) Mass (8) 1. AI 0.9002 100.0 2. Al 0.9002 50.0 3. Au 0.1289 100.0 4. Au 0.1289 50.0 5. Zn 0.3860 100.0 6. Zn 0.3860 50.0 In an experiment, you are asked to select one piece of metal and heat it to 100.0 °C, and...
Needing help with chemistry please 2. Meals, Ready-to-Eat (MREs) are military meals that can be heated...
Needing help with chemistry please
2. Meals, Ready-to-Eat (MREs) are military meals that can be heated on a flame-less heater. The heat is produced by the following reaction: Mg(s) + 2H2O(l) ? Mg(OH)2(s) + H2(g) a. Calculate the standard enthalpy change (???xn) for the reaction. Calculate the mass of Mg (in g) needed for this reaction to release enough energy to increase the temperature of 25 mL of water from 15°C to 85 C. The density of water is 1.00...
need help ASAP Question 9 4 pts Exactly 1.100 g of CO2(g) was introduced into a...
need help ASAP
Question 9 4 pts Exactly 1.100 g of CO2(g) was introduced into a 1.00-L flask that already contained some O2 gas. The flask was warmed to 100 °C and the total pressure was found to be 815 mmHg. No chemical reaction occurred between CO2 and 02. Calculate the mass of Oz in the flask. 1.12 g 02 O 0.160 g 02 O 0.754 g 02 O 0.820 g 02 O 0.321 g 02 1.5 pts Question 10...
Question 14 1.5 pt Arrange the following species in increasing size: Al, Al3+, S, and S2-...
Question 14 1.5 pt Arrange the following species in increasing size: Al, Al3+, S, and S2- Os2-<AI <S<A13+ O A13+ < AL<$<82- OS<A13+ < Al < 52- o 52-<Al< A1+ <3 O A13+ <S<A1 < 52- Question 15 1.5 pt What is the average bond order for a Si–O bond in the ion SiO32-? 0 1 0 2/3 O 3/2 2 04/3
please answer all Question 19 1.5 pts Which of the following molecules contains a smallest bond...
please answer all
Question 19 1.5 pts Which of the following molecules contains a smallest bond angle between two fluorine atoms? SiF4 BF3 Oo ooo CF4 KrF4 NF3 Question 14 1.5 pts Arrange the following species in increasing size: AI, Al3+, S, and S2- 52- <Al<S<A13+ A13+ < Al<S<S2 S<A13+ < Al< 52 52- < Al< A13+ <S A13+ <$< Al < 52 Question 12 2 pts You have the six pieces of metal listed below, plus a beaker of...
The meals-ready-to-eat (MREs) in the military can be heated on a
flameless heater. You can purchase a similar product called “Heater
Meals”. Just pour water into the heater unit, wait a few minutes,
and you have a hot meal. The source of energy in the heater is the
exothermic reaction of magnesium with water:
Mg(s) + 2 H2O(ℓ) → Mg(OH)2(s) +
H2(g)
ΔHf° (kJ/mol)
Mg(s)
0
Mg(OH)2(s)
–924.5
H2O(ℓ)
–285.8
H2(g) ...
Question 13 4 pts The meals-ready-to-eat (MREs) in the military can be heated on a flameless heater. You can purchase a similar product called "Heater Meals”. Just pour water into the heater unit, wait a few minutes, and you have a hot meal. The source of energy in the heater is the exothermic reaction of magnesium with water: Mg(s) + 2 H2O(l) + Mg(OH)2(s) + H2(g) AH° (kJ/mol) Mg(s) 0 Mg(OH)2(s) -924.5 H2011) -285.8 H2(g) 0 Calculate the mass, ing,...
please HEP on those 2 questions
Question 13 4 pt The meals-ready-to-eat (MREs) in the military can be heated on a flameless heater. You can purchase a similar product called "Heater Meals". Just pour water into the heater unit, wait a few minutes, and you have a hot meal. The source of energy in the heater is the exothermic reaction of magnesium with water: Mg(s) + 2 H2011) + Mg(OH)2(s) + H2(g) AH° (kJ/mol) Mg(s) 0 Mg(OH)2(s) -924.5 H2010) -285.8...
[8 marks] 1. The meals-ready-to-eat (MREs) in the military can be heated on a flameless heater. The source of the heat energy is the reaction shown below: Mg(s) + 2 H2O(1) ► Mg(OH)2() + H2(g) Mg(OH)2(s) H2O(1) Mg(s) H2(g) AHºr (kJ/mol) -924.54 -285.83 0 0 b) How much heat (9), in J, is released when 4.25 g of Mg is reacted according to the equation above?
7.71 Ready-to-eat meals used by military personnel and campers can be heated on a flameless heater. The source of energy in the heater is the reaction repre- sented by Mg(s) + 2 H2O(0) - Mg(OH)2(s) + H2(g) Calculate the standard enthalpy change at 25 °C for this reaction. What quantity of magnesium is needed to supply the heat required to warm 25 mL of water (d = 1,00 g mL-') from 25 °C to 85 °C?
You have the six pieces of metal listed below, plus a beaker of water containing 300 g of water. The water temperature is 21.0°C and its specific heat is 4.184 J/g.°C. Metal Specific heat (J/g.°C) Mass (8) 1. AI 0.9002 100.0 2. Al 0.9002 50.0 3. Au 0.1289 100.0 4. Au 0.1289 50.0 5. Zn 0.3860 100.0 6. Zn 0.3860 50.0 In an experiment, you are asked to select one piece of metal and heat it to 100.0 °C, and...
Needing help with chemistry please
2. Meals, Ready-to-Eat (MREs) are military meals that can be heated on a flame-less heater. The heat is produced by the following reaction: Mg(s) + 2H2O(l) ? Mg(OH)2(s) + H2(g) a. Calculate the standard enthalpy change (???xn) for the reaction. Calculate the mass of Mg (in g) needed for this reaction to release enough energy to increase the temperature of 25 mL of water from 15°C to 85 C. The density of water is 1.00...
need help ASAP
Question 9 4 pts Exactly 1.100 g of CO2(g) was introduced into a 1.00-L flask that already contained some O2 gas. The flask was warmed to 100 °C and the total pressure was found to be 815 mmHg. No chemical reaction occurred between CO2 and 02. Calculate the mass of Oz in the flask. 1.12 g 02 O 0.160 g 02 O 0.754 g 02 O 0.820 g 02 O 0.321 g 02 1.5 pts Question 10...
Question 14 1.5 pt Arrange the following species in increasing size: Al, Al3+, S, and S2- Os2-<AI <S<A13+ O A13+ < AL<$<82- OS<A13+ < Al < 52- o 52-<Al< A1+ <3 O A13+ <S<A1 < 52- Question 15 1.5 pt What is the average bond order for a Si–O bond in the ion SiO32-? 0 1 0 2/3 O 3/2 2 04/3
please answer all
Question 19 1.5 pts Which of the following molecules contains a smallest bond angle between two fluorine atoms? SiF4 BF3 Oo ooo CF4 KrF4 NF3 Question 14 1.5 pts Arrange the following species in increasing size: AI, Al3+, S, and S2- 52- <Al<S<A13+ A13+ < Al<S<S2 S<A13+ < Al< 52 52- < Al< A13+ <S A13+ <$< Al < 52 Question 12 2 pts You have the six pieces of metal listed below, plus a beaker of...
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