General Questions and Answers

"Thaw frozen food safely in the refrigerator, in cold water, or in the microwave. Never thaw foods on the counter, because bacteria multiply quickly in the parts of the food that reach room temperature." Identify the meaning of the precise verb "thaw." Soften Melt Liquefy

Choose the correct answer. _ is not central to the aim of a first draft. Perfecting spelling and grammar Taking points from the outline and turning them into full sentences and paragraphs Fleshing out key ideas

Identify the sentence fragment from the following: Sue the bus station before time. The tree swayed in the wind. Mike went biking and swimming after work.

Identify the sentence where the verb tense is consistent. Martin pick up the phone and dialed the number. Martin picked up the phone and dials the number. Martin picked up the phone and dialed the number

Which of the following is not a simple sentence? I waited for the train, but the train was late. Mary arrived at the bus station early. The course starts next week.

If you want to make a 32 M NaF solution with 7.8 L of solution, how many grams of NaF would you need to add? Include at least 2 NON-zero decimals on your answer. (include Units on your Answer)

What role does evidence play in an argumentative essay? Evidence disproves personal experiences detalled in the essay. Evidence supports the claims that the writer makes. Evidence introduces new ideas that come into play.

Which of the following should be written in the introduction? I. Background information about the topic II. Thesis or claim about the topic III. Supporting evidence of the topic II and III III and I I and II

Calculate the [OH-] for the following and determine if it is an acid or base. (Hint: Use formulas found on your reference table!) a. pH = 5.0 b. pOH = 6.0

Here is a complete ionic equation: 2K+(aq) +SO42-(aq)+ Ba2+(aq) +2 C₂H3O2- --> BaSO4(s) + 2 K+(aq) + 2 C₂H3O₂- (aq) Fill in the blanks below to complete the net lonic equation.

Which of the following is the best place to introduce the claim in the essay? Conclusion. Second paragraph. The end of the introductory paragraph.

Find the empirical formula for a compound which contains 32.8% chromium and 67.2% chlorine.

If you start with 20 grams of hydrochloric acid, how many moles of sulfuric acid will be produced according to the following reaction? 2 HCl + Na₂SO4 -> 2 NaCl + H₂SO

An airplane is pressurized with air to 650. mmHg. a. If air is 21% oxygen, what is the partial pressure of oxygen on the plane? b. If the partial pressure of oxygen drops below 100. mmHg, passengers become drowsy. If this happens, oxygen masks are released. What is the total cabin pressure at which oxygen masks are dropped?

A scuba diver 60 ft below the ocean surface inhales 50.0 mL of compressed air from a scuba tank at a pressure of 3.00 atm and a temperature of 8 °C. What is the final pressure of air, in atmospheres, in the lungs when the gas expands to 150.0 mL at a body temperature of 37 °C, if the amount of gas does not change?

Student A measures an object and records a value of 1.5 cm. Student B measures the same object and records a value of 1.50 cm. They have both done their measurements correctly. Why do these measurements differ? a. They aren't different. b. Person A used a ruler with markings every 0.1 cm. Person B used a ruler with markings every 0.01 cm. c. Person A used a ruler with markings every 1 cm. Person B used a ruler with markings every 0.1 cm. d. Person A rounded their measurement.

How many milliliters of 2.0 M HCI is needed to completely react with 0.83 g of Mg? Mg(s) + 2 HCl(aq) → MgCl₂(aq) + H₂(g)

"The fate of the Yellowstone Park herd is, to say the least, highly uncertain. A distinguished Senator, who is deeply interested in legislation for the protection of the National Park reservation, has declared that the pressure from railway corporations, which are seeking a foot-hold in the park, has become so great and so aggressive that he fears the park will "eventually be broken up." In any such event, the destruction of the herd of park buffaloes would be one of the very first results. If the park is properly maintained, however, it is to be hoped that the buffaloes now in it will remain there and increase indefinitely." Identify the precise adverb that tells of the population of the herd growing with no fixed end. Highly Indefinitely Eventually

why is the resin equilibrated with citrate buffer (ph 3.75)?

Potassium hydroxide and nitric acid react according to the following balanced chemical equation: 1 KOH + 1HNO3 --> 1H₂O + 1 KNO₂ It takes 43 ml of 0.34 M KOH solution to neutralize 75 ml of your unknown HNO, What is the molarity of your unknown acid solution?

Given the value of the three densities below, determine which would float on water. Solid 1 9 g has a volume of 16.45 mL Liquid 2-density of 908 kg/m³ Solid 3- 25.85 g with a volume of 0.2585 mL Essay answers are limited to about 500 words (3800 characters maximum, including spaces). 3800 Character(s) remaining Submit Request Answer How do you know if a material will float or sink in water? Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

What does the following sentence from the essay "Federalist No. 21. Other Defects of the Present Confederation" by Hamilton depict? "The attempt, therefore, to regulate the contributions of the members of a confederacy by any such rule, cannot fail to be productive of glaring inequality and extreme oppression." Indicates a claim Evidence for the counterclaim False claim

Which of the following chemical reactions represents a neutralization reaction? Select one: ZnCl₂ + MgSO4 --> ZnSO4 + MgCl₂ KOH + HBr --> KBr + H₂O H₂SO4 +CaCl₂ --> CaSO4 + HCI NH₂OHKCI --> KOH + NH₂Cl

The opposing argument in an argumentative essay should come immediately after the main argument refutation concession

The other name for claim is conclusion thesis statement refutation

Choose the correct answer. Itching is to scratching as fatigue is to Gaping Stretching Yawning

Choose the correct answer. Parenthetical documentation should be placed at the end of the paragraph of the quote at the end of each paragraph immediately after the quote

A student dissolves 0.64 moles of solute in enough water to make 0.78 liters of solution. What is the molarity of this solution? Please include at least 2 NON-zero decimals on your answers. Please include units Answer:

Which has the lowest first ionization energy - calcium, strontium, or beryllium? Explain using Coulomb's law.

A gas occupies 37.7 L at 2.00 atm pressure and 27°C. Calculate its volume at STP. 82.9 L 762 L 34.3 L 81.6 L 68.6 L

Which of these could be an acid? Select one: KCI Na₂C₂O4 H₂C₂O4 KOH

Calculate the mass percent (m/m) of a solution containing 26 g of K₂CO3 and 724 g of H₂O.

A student wants to prepare a 1.5 M NaCl solution. How many liters of solutions can be made if the student has 26.9 g of NaCl?

How many grams of Li₂S are present in 450 mL of a 0.75 M Li₂S solution?

Predict the products of the following reaction; write a balanced chemical equation and classify the type of reaction. Potassium chloride reacts with lead (II) nitrate.

How many joules of energy are released when 150.0g of water vapor are condensed to liquid water?

How many grams of Mg3(PO4)2 can be produced when 82.0 mL of 3.5 M MgCl₂ reacts with excess sodium phosphate? (Refer to the balanced chemical equation in question #9)

Here is a molecular equation: Cu(OH)₂(aq) + H₂SO4(aq) --> CuSO4(aq) + 2H₂O(l) Which of the choices below is the left side of the complete ionic equation for this same reaction? Select one Cu (aq) + OH(aq) + H(aq) + S0³(aq) Cu(aq) + 2OH(aq) + 2H(aq) + S0 (eq) - Cu (aq) + (OH)₂ (aq) + H₂(aq) + S0³(aq) - (aq) + H₂(aq) + S0 (aq) - Cu(aq) + (OH);

How many milliliters of 3.0 M Na3(PO4)2 are needed to react with 38.0 mL of 2.5 M MgCl₂? 2 Na3PO4(aq) + 3 MgCl₂(aq) → 6 NaCl(aq) + Mg3(PO4)2(s)

Calculate the pH of the resulting solution if 18.0 mL of 0.180 M HCl(aq) is added to 23.0 mL of 0.180 M NaOH(aq). pH = Calculate the pH of the resulting solution if 18.0 mL of 0.180 M HCl(aq) is added to 28.0 mL of 0.230 M NaOH(aq). pH =

A student needs to make 250 mL of 1.4 M Fe(NO3)3 by dilution. How many milliliters of a 5.0 M Fe(NO3)3 solution should the student use to prepare the solution?

For each complex, determine the number of d electrons in the metal ion.

Which of the following is NOT the specific verb for the word "say"? Confess Murmur Stomp

What is the molarity of a solution containing 15.6 g of KCl in 274 mL of KCl solution?

What is the molarity of a MgSO4 solution that contains 18.4 g of MgSO4 in 350 mL of solution?

Find AH for the reaction 2H2(g) + 2C(s) + O2(g) → C₂H5O2H(l), using the follow thermochemical data. C₂H5O2H (l) + 2 O₂ (g) → 2 CO₂ (g) + 2 H₂O (l) ΔH=-875 kJ C(s) + O₂(g) → CO₂ (g) ΔH=-394.51 H₂(g) + O₂(g) → H₂O (l) ΔH = -285.8 k

How many mL of a 10.0 ppm TCE solution are needed to have 1.00 g of TCE?

An environmental chemist found 2.4 x 102 g of a pesticide in 2.00 L of water. 1. What is the % m/v? 2. What is the concentration ppm ?

Under what conditions will a gas start to behave in a non-ideal fashion? (Check all that apply) A. When the temperature is lowered. B. When the volume increases with a corresponding decrease in pressure. C. When the pressure is altered due to attractions between neighboring gas particles. D. When the volume of the container becomes small enough such that the total volume of the gas particles themselves become relevant.

How many liters of a 2.500 M Na₂SO4 solution are needed to have 0.100 g of Na₂SO4? The GFW is 142.07 g. A. 0.000282 L B. 0.00250 L C. 0.00176 L D. 0.0400 L