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A: Question 1: [HF]=5.42MQuestion 2: [HF]=2.55M
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- (aq) (aq) ВаCl, (aq) + H,0 (1) 6.1-61 The density of dichloromethane, a liquid insoluble in water, is 1.33 g/cc. If dichioromethane and water are placed in a separatory funnel, which will be the upper layer?1-86 The specific heats of some elements at 25oC are as follows: aluminum = 0.215 cal/g · oC; carbon (graphite) = 0.170 caI/g oC; iron = 0.107 cal/g mercury = 0.033 1 caI/g oC. (a) Which element would require the smallest amount of heat to raise the temperature of 100 g of the element by 10oC? (b) If the same amount of heat needed to raise the temperature of 1 g of aluminum by 25oC were applied to 1 g of mercury, by how many degrees would its temperature be raised? (c) If a certain amount of heat is used to raise the temperature of 1.6 g of iron by 10oC, the temperature of 1 g of which element would also be raised by 10oC, using the same amount of heat?
- (Al,(S0.);) A chemist must dilute 20.6 mL of 22.0 mM aqueous aluminum sulfate solution until the concentration falls to 9.00 mM . He'll do this by adding distilled water to the solution until it reaches a certain final volume. Calculate this final volume, in milliliters. Be sure your answer has the correct number of significant digits. ||mLhh.1a .ull Asiacel| 10 N 141 N O A box with a volume (V=0.05 m³) lies at the bottom of a lake whose water has a density of (1*10³ kg/m³). How much force is required to lift the box, .if the mass of the box is (1000 kg) 9319.5 N O 9313.9 N O 9391.5 N O 9315.9 N O A future rectangular ship filled with oil. If the dimensions of the ship are (250 m) long, (80 m) wide, and (80 m) high. Determine how far the bottom of the ship is below the sea level? (Consider the total mass of the ship with the oil is (10.2*108 kg), and the .sea density is (1024 kg/m³))
- Percent by Mass= Mass of Solute x100 Percent by volume and Percent by Mass calculations Mass of Solution Volume of Solute Name: Percent by Volume= -x100 Volume of Solution 1. 1. Calculate the percent by volume if 56.7 ml of alcohol is added to 540 ml of water. (Remember to add both solute and solvent to get the total volume of solution to put on the bottom.) 540 15.23 2 Calculate the percent by mass if 35.0 grams of NaC! is added to 455 grams of water to make a salt solution. 3. Calculate the percent by volume if 15.5 ml of HCI is added to 1.0 Liter of water. 4. Calculate the amount of water needed to make a 5% solution of alcohol, if you have 25 ml of alcohol? (Hint: first you will need to find the total amount of solution needed. then subtract the 25 ml from that.)6. 7.90 kilograms (Kg) to pounds (Ibs) %3D %3D 7 112 liters (L) to cuns (cA(s)+3B(l)−⇀↽−2C(aq)+D(aq)A(s)+3B(l)↽−−⇀2C(aq)+D(aq) in terms of [A],[A], [B],[B], [C],[C], and [D],[D], as needed. Note that Kc,Kc, which is sometimes symbolized as Keq,Keq, denotes that the equilibrium constant is expressed using molar concentrations. For this question, KcKc means the same thing as Keq.Keq. Kc=Kc=
- Calculate the electrostatic force of repulsion for two protons separated by 93.0 pm. The charge of a proton is q = 1.6 x 10-1⁹ C. Express your answer to two significant figures and include the appropriate units. Fel = μA 2.7.10 6 Submit N Previous Answers Request Answer ? X Incorrect; Try Again; 5 attempts remaining Use the equation Fel = K(Q₁ Q₂/d²) to find the electrostatic force between the two particles. Q₁ and Q2 are the charges on the particles (charge of a proton here), and d is the distance of separation. The constant is given in the introduction and has the units Nm²/C². This means that the distance must be converted from picometers to meters using the relation 1 pm = 1 × 10¯ m. -12How many kratvels can you spend during the week? (Context is found within the image)1-38. To entertain children between the ages of 2 and 90, I enjoy popping corks from bottles containing vinegar and baking soda pour about 50 mL of vinegar into a 500-mL plastic bottle. Then I wrap about 5 g of baking soda (which is sodium bicarbonate, NaHCO3) in one layer of tissue and drop the tissue into the bottle I place a cork tightly in the mouth of the bottle and step back. The chemical reaction generates CO2(g) that pressurizes the bottle and eventually bursts the cork into the air. Everyone smiles. I CH2CO2HNaHCO3 >CH2CO2 + Na + CO2(g) H2O Acetic acid Sodium bicarbonate in vinegar in baking soda (a) Find the formula mass of acetic acid and of sodium bicarbonate (b) How many grams of acetic acid are required to react with 5 g of NaHCO3? (c) Vinegar contains ~5 wt% acetic acid. How many grams of vinegar are required to react with 5 g of NaHCO3? The density of vinegar is close to 1.0 g/mL. How many mL of vinegar are required to react with 5 g of NaHCO3? (d) Which is the limiting…
