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1. A car is driven at constant velocity along a level highway. Indicate the value of the net force and list all the main forces acting on the car to produce the net force. Clearly explain what produces or exerts each of the contact forces acting on the car and explain which forces are balanced.
2. Summarize two observations that are contrary to the predictions based on Newton's laws but that confirm Einstein's explanation of gravity. Indicate how the predictions based on Newton's theory differ from Einstein's.
Explain what is the net ionic equation for the reactions that take place when HCl and NaCl are added to the buffer CH3COOH + NaOH = NaCH3COO + H2O
A 32.0 iron rod, initially at 22.0C, is submerged into an unknown mass of water at 63.7C, in an insulated container. The final temperature of the mixture upon reaching thermal equilibrium is 59.4C.
Compute the morality of Ba (OH)2 solution if 29.02 mL were required to reach a phenolphthalein endpoint with a 0.4853 gram sample of primary standard potassium hydrogen phthalate (204.23g/mol).
What is the stoichiometric coefficient for aluminum when the chemical equation is balanced using the lowest, whole-number stoichiometric coefficients?
76 g of Cr2O3 and 27 g of Al completely react to form 51 g of Al2 O3, how many gram of Cr are formed?
Problem- A solution is made by mixing 36.0 mL of ethanol, C2H6O, and 64.0 mL of water. Assuming ideal behavior, what is the vapor pressure of the solution at 20 °C
what are some good resourceslinks for a thorough yet decently quick review of chemistry midterm 25th final 30th. any
calculate the moles of h2 present in this gas sample. . 9. 1.0 gram of water at 25 c is heated to 100 c at which point
Assume the eccentric professor has a daily special request for her coffee. She likes to have the 250.0 mL of coffee frozen at -15.0°C overnight and then want it heated to 95°C when she gets there in the morning.
What are the [H3O+] and the pH of a propanoate buffer that consists of 0.48 M CH3CH2COONa and 0.34 M CH3CH2COOH? Ka of propanoic acid = 1.3 multiplied by 10-5.
Draw a structural representation to describe the H-bonding responsible for the high boiling point of ethylamine and the structural representation of the H-bonding present when ethylamine dissolves in water.
When 5.00 × 1022 molecules of ammonia react with 4.00 × 1022 molecules of oxygen, how many grams of nitrogen gas are produced? 4NH3(g) + 3O2(g) → 2N2(g) + 6H2O(g)
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