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Chemistry
Two metal objects are placed in direct contact. Both objects have the same shape and about the same mass. Initially block A has a temperature of 100C and block B a temperature of 20C. After placing the two blocks in direct contact, the temperature of both blocks are again checked and this time the temperature of Block A is 60Cand block B is 60C. How can we explain why the final temperature of both objects are so different? *
Chemistry
Thermochemical changes: Standard Enthalpies of Formation
Fe2O3(s)+3CO(g)→3CO2(g)+2Fe(s) Standard enthalpy change of this reaction is: -24.8kJ
Question: what is the mass of carbon dioxide produced in the above reaction when 250 kJ of energy are released?
Chemistry
4g of sodium is reacted with excess oxygen to make sodium oxide. Work out the mass of sodium oxide produced.
Chemistry
An object has a kinetic energy of 275 J and a momentum of magnitude 25.0 kg * m/s. Find the (a) speed and (b) mass of the object.
Chemistry
what is the expected volume of 10 grams of oxygen gas at STP? given that the volume of 1 mole of a gas at STP is 22.4 Liters
Chemistry
what would happen to the reading of a open end manometer if it was brought up a mountain from sea level?
Chemistry
Determine ΔH for the following reaction.
C4H10 (g) + oxygen (g) carbon dioxide (g) + water (g
C4H10 (g) + oxygen (g) carbon dioxide (g) + water (g
Chemistry
What is aluminum
Chemistry
A vitamin syrup for infants contains 27.44 mg of zinc sulfate monohydrate (ZnSO4.H2O) and 100.00 mg of ascorbic acid (C6H8O6)for every 5 ml.
How many molecules of zinc sulfate monohydrate does a 5 ml of vitamin have?
Note: Round off your answer to two decimal places.
How many molecules of zinc sulfate monohydrate does a 5 ml of vitamin have?
Note: Round off your answer to two decimal places.
Chemistry
What would happen to the reading of a barometer if it was brought inside a house from the outside?
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#339914 on Dec 2023
#339914 on Dec 2023