Question

1. Given the equation: Mg + 2 HCl → MgCl2 + H2 . How many moles of H2 is produced when one mole of Mg is reacted with HCI? Se
0 0
Add a comment Improve this question Transcribed image text
Answer #1

1)

From balanced chemical equation:

Mol of H2 produced = mol of Mg reacted

= 1 mol

Answer: A

2)

P = 21.0 mmHg

= 21.0/760 atm

= 0.0276 atm

Answer: A

Add a comment
Know the answer?
Add Answer to:
1. Given the equation: Mg + 2 HCl → MgCl2 + H2 . How many moles...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions
  • Magnesium metal reacts with hydrochloric acid to give hydrogen gas. Mg + 2 HCl → MgCl2...

    Magnesium metal reacts with hydrochloric acid to give hydrogen gas. Mg + 2 HCl → MgCl2 + H2 Use the following reaction information to answer the subsequent questions. Show all of your work. 92 mm Length of Magnesium ribbon: Barometric Pressure: 762.9 mmHg Water Temperature: 29 °C Initial Gas Volume: 0.00 mL Final Gas Volume: 67.35 mL 0.7559 Mass = Length (in mm) x (1000 mm) 1. Magnesium is usually found in the laboratory as a ribbon strip. Find the...

  • given equation Mg + 2 HCl —> MgCl2 + H2 If a chemist uses 20g Mg...

    given equation Mg + 2 HCl —> MgCl2 + H2 If a chemist uses 20g Mg and excess HCl, what mass of MgCl2 product would form?

  • Additional Exercise 14.78 For the equation below: Mg(s) + 2 HCl(aq) MgCl2(aq) + H2(g) (a) How...

    Additional Exercise 14.78 For the equation below: Mg(s) + 2 HCl(aq) MgCl2(aq) + H2(g) (a) How many moles of hydrogen will be liberated from 137.1 mL of 4.84 M HCl reacting with an excess of magnesium? mol H2 the tolerance is +/-2% (b) How many liters of hydrogen gas (H2) measured at 37 °C and 710 torr will be obtained? L H2 the tolerance is +/-2%

  • please show work How many grams of HCl, are needed to produce 125 ml of carbon...

    please show work How many grams of HCl, are needed to produce 125 ml of carbon dioxide gas at STP in the following reaction? CaCO3(s) + 2 HCl(aq) - -> CaCl(aq) + CO2(g) + H20(1) In a reaction similar to this laboratory experiment, 0.625 g of aluminum metal was completely consumed and the H, gas collected over water at 55.0°C and atmospheric pressure of 759 mm Hg. What was the volume of H, gas produced? (Be sure to correct H2...

  • i need help with the moles of H2 gas please Trial 1 Trial 2 Mass of...

    i need help with the moles of H2 gas please Trial 1 Trial 2 Mass of Mg ribbon (e) 10.0541 g 0.07839 Barometric pressure (mmHg) (Proom) 1 75 66 matts 756 mutta Temperature of the room (°C) 224 °C 22.4 °C Temperature of water inside beaker (°C) 23.0°C 22.8°C (T2) Pwater (mm Hg) Vapor pressure of water found in table 21.068 van Hg 20.615 mm Hg at the end of the experiment, based on the temperature of water inside the...

  • Consider the following reaction: 2 HCl(aq) + 1 Mg(s) → 1 MgCl2(aq) + 1 H2(g) ΔH°rx...

    Consider the following reaction: 2 HCl(aq) + 1 Mg(s) → 1 MgCl2(aq) + 1 H2(g) ΔH°rx = -465.8 kJ Determine the amount of heat released, in kJ, of each of the following scenarios. Give each answer to 2 decimal places. (a) 10.69 g of Mg(s) is reacted with excess HCl(aq)· (c) 1.17 g of H2(g) is produced from the reaction after completion. (b) Excess Mg(s) is added to 440 mL of 0.996 M of HCl(aq)· (d) 580 mL of a...

  • Sea water has about 0.46 moles NaCl and 0.065 moles of MgCl2 in every liter. What...

    Sea water has about 0.46 moles NaCl and 0.065 moles of MgCl2 in every liter. What is the vapor pressure of sea water at 30°C if pure water would have a vapor pressure of 33.2 mm Hg? (assume there are 1000 grams of water in 1 liter of sea water) Choose one answer. A. 37.0 mm Hg B. 32.9 mm Hg C. 33.2 mm Hg D. 32.5 mm Hg E. 30.3 mm Hg

  • In the laboratory, hydrogen gas is usually made by the following reaction: Zn(s) + 2 HCl(aq)...

    In the laboratory, hydrogen gas is usually made by the following reaction: Zn(s) + 2 HCl(aq) → H2(g) + ZnCl2(aq) How many liters of H2 gas, collected over water at an atmospheric pressure of 752 mm Hg and a temperature of 21.0°C, can be made from 1.566 g of Zn and excess HCl? The partial pressure of water vapor is 18.65 mm Hg at 21.0°C.

  • 1. If 2.6 moles of Mg were mixed with HCl, how many moles of H2 gas would you expect to be produced? NG 3 2. If th...

    1. If 2.6 moles of Mg were mixed with HCl, how many moles of H2 gas would you expect to be produced? NG 3 2. If the ambient pressure is 1.009 atm and the temperature is 298 K, what volume (in liters) would moles of H, occupy? NG| 3

  • DATA Trial 1 Trial 2 Mass of Mg ribbon (g) TO SU 0.07839 (Proom) Barometric pressure...

    DATA Trial 1 Trial 2 Mass of Mg ribbon (g) TO SU 0.07839 (Proom) Barometric pressure (mmHg) 756 matte 756rrotta | 22.4°C Temperature of water inside beaker (C) 23.0°C 22.8°C Temperature of the room (°C) (T2) Pwater (mm Hg) Vapor pressure of water found in table at the end of the experiment, based on the temperature of water inside the beaker. 5 mm Hg Volume from graduated cylinder (mL) (V2) 60.2mL 82.4mL CALCULATIONS . Write the balanced chemical equation for...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT