Paula

Most popular questions and responses by Paula
1. Algebra

What inequality represents the verbal expression all real numbers less then 69? My answer is x

2. Lincoln College Of New En

it has been found that 85.6% of all enrolled college and university students in the U.S. are undergraduates. A random sample of 500 enrolled college students in a particular state revealed that 420 of them were undergraduates. Is there sufficient evidence

3. Chemistry

Phosphoric acid, H3PO4(aq), is a triprotic acid, meaning that one molecule of the acid has three acidic protons. Estimate the pH, and the concentrations of all species in a 0.300 M phosphoric acid solution. kPa1: 2.16 kPa2: 7.21 kPa3:12.32 [H3PO4] = ?

4. physics

Scientists want to place a 3300 kg satellite in orbit around Mars. They plan to have the satellite orbit a distance equal to 2.2 times the radius of Mars above the surface of the planet. Here is some information that will help solve this problem: mmars =

5. Chemistry

Phosphoric acid, H3PO4(aq), is a triprotic acid, meaning that one molecule of the acid has three acidic protons. Estimate the pH, and the concentrations of all species in a 0.300 M phosphoric acid solution. pKa1: 2.16 pKa2: 7.21 pKa3: 12.32 Hint: Convert

6. science

why does a cool, distant, supergiant star such as Betelgeuse have such a high apparent magnitude? PLEASE HELPPPPP!!!!!!

7. Algebra

Sis the set of prime numbers that are less than 15. My answer is 2,3,5,7,11, and 13

8. chemistry

What is the total change in entropy when 10.0 g of ice melts at 25.0°C? DHfus = 6.01 kJ/mol The answer is 1.03 J/K but idk how to find it.

9. Algebra

Choose them compound inequality that represents all real numbers that are less then -3 or greater than or equal to 5.

10. Com 425

Which of the following statements is an example of metacommunication? 1) "Lets introduce ourselves one at a time." 2) Don't call me names!" 3) I think we should take this vote to the Board." 4) Let's agree to not discuss old issues today."

11. science

If Deneb and Rigel were located at alpha Centauri's distance from earth, how would they appear? PLEASEEE HELPPPPPP!!!!!!!!!!

12. chemistry help

What mass of ammonium chloride must be added to a 0.500 L solution of 0.250 M ammonia to make a buffer with a pH of 9.26? Kb (NH3) = 1.8 × 10–5?

13. STATISTICS

the percentage rates of home ownership for 8 randomly selected states are listed below. Estimate the population variance and standard deviation for the percentage rate of home ownership with 99% confidence. 66.0 75.8 70.9 73.9 63.4 68.5 73.3 65.9

41. English

The toy car of jess is new

42. science

what would be the absolute magnitude and color of a main sequence star with a temperature of 25,000 kelvin? HELP!

43. Chemistry

Calculate Delta H for the following equation: Zn(s) + 2H+(aq) = Zn2+(aq) + H2(g)

44. Music

What is the vertical line at the end of a measure called?

45. chemistry

a thermometer containing 9.5g of mercury has broken. If Mercury has a density of 13.6g/ml what volume spilled

46. math

The figure shown the chain drive of a bicycle. How far will the bicycle move if the pedals are rotated at 180°. Assume the radius of the bicycle wheel is 13.6 inches. There's a small circle w/a radius of 1.38 in and a large circle w/ 4.33 in.

47. College chemistry

103.5 mL of hydrogen are collected over water at 22.2 degrees Celsius and 758.2 torr from reaction with 0.1356 grams of alloy. calculate the number of moles of dry hydrogen gas that were collected.

48. math word problem

There are 10 women and 8 men in a club. How many different committees of 6 people can be selected from the group if equal numbers of men and women are to be on the committee? I think it would be 2, because half of 6 is 3, so 3 are men and 3 are women. 2

49. COM425

Abdoulaye tells his teammate Rick that he prefers to be called “Abdoulaye”; yet Rick continues to call him “Abdou.” This is a violation of __________ rules. 1) communication 2) relational 3) interpersonal 4) corporate (I think its relational, not

50. chemistry

A sample of 10.00g of a solid unknown was dissolved in 25.00g of water. Assuming that pure water freezes at 0.0°C and the solution freezes at -5.58°C, what is the molal concentration of the solution? What is the molar mass of the solid? Show your

51. Chemistry

CO(g) + 2H_2(g) CH_3OH (g) deltaH=-90.7kJ Methanol is prepared industrially from synthesis gas (CO and H_2) Would the fraction of methanol obtained at equilibrium be increased by raising the temperature? Explain. Thank you :)

78. chemistry

draw particle diagrams that account for the fact that 2 volumes of nitric oxide gas react with 1 volume of oxygen gas to form 2 volumes of product with no leftover gas

79. Lincoln College Of New En

How man 4 letter code words can be made using the letters in the word pencil if repetitions are permitted?

80. Math

four times the difference or two posotive integer numbers is equal to half the sum of the numbers. If one of the numbers is 14, what is the other number? I just cant get this can anyone help me?

81. chemistry

What happens when : (give balanced chemical equations only) 1. Caustic soda reacts with carbon dioxide 2.caustic soda reacts with zinc hydroxide 3.potassium reacts with oxygen 4.sodium carbonate is fused with silicon dioxide 5. when bleaching powder reacts

82. math

Heidi has a brown pair and a gray pair of slacks; a brown blouse, a yellow blouse, and a white blouse: and a blue sweater and a white sweater. How many different outfits does she have if each outfitshe wears consists of slack, a bluse, and a sweater?

83. Food and Nutrition

How can food spices be either an obstacle or an aid to blending into a new culutre? If you prefer to eat highly spiced or seasoned foods, you might not want to eat the foods that are popular in your new culture. I knew a Vietnamese man who lived in the

84. finance

A quaint but well established cafe shoppe in the new hot cafe wants to build a new cafe for increased capicity it expect sales are $800,000.00 for the first 5 years, direct cost including labor and material 50% for new cafe will be totaled at$750,000.00

85. Math

if 5x + 7y = 18 and 2x - 4y = 6, what is the value of 7x + 3y? a. 7 b. 12 c. 19 d. 24 e. 31

86. science

2 students were testing the amount of fertilizer that would best promote the growth of strawberries in a garden. What is an unavoidable error they can make during this process?

87. Living Environment

How one type of atom (carbon)can be the basis of so many types of biomolecules?

88. math

julie arrived 20 minutes before the race began. she started right on time. it took her 24 minutes to finish the6-kilometer race. she stayed 10 minutes after the race to cool off; she left. if she arrived at the race at 9:10a.m., what time was it when she

89. math word problem

The sum of a number and its square is 72. What is the number? I took a guess at 8, but I don't know how to put it in an equation form.

90. math word problem

Jim is making a diagram of the solar system. If he draws Neptune, which is 2795 million miles from the sun, 10 inches from the sun on his paper, how far away (to the nearest tenth of an inch) from the sun should he draw Mars, which is 142 million miles

91. Chemistry

In a certain reaction, 300.23 grams of solid aluminum sulfide combine with unlimited aqueous silver nitrate. How many moles of aluminum sulfide react? How many moles of each product will be produced? First of all, is the reaction a double replacement or