# CHEMISTRY (WEBWORK)

59,576 results, page 13

1. ### English

Hello! I will type 2 exercises from the lesson I am teaching on Wednesday-english as a foreign language - 8th graders ( it will be graded) I need you to help me with some ideas. It says: LEAD- IN: A Here is a list of some natural sciences: BIOLOGY CHEMISTRY PHYSICS BOTANY ...
2. ### Statistics- Math

One student scored 54 on a math test for which the mean score was 50.5 and the standard deviation was 3.2. Another student scored 80 on a chemistry test for which the mean score was 75.2 and the standard deviation was 5.2. Which student (math or chemistry) had a "better" score...
3. ### chemistry

Please help!!! Desperate for answer!!!? Did the equation do not know the 2nd questions"s answers for the problems a) 2O3(g) = 3 O2(g) + heat (O3 IS UNDERLINED) [6.0x10-1] [0.21] b) 2 CO2 (g) + heat = 2 CO(g) +O2(g) (CO IS UNDERLINED) [0.103] [0.024] [1.18 x10-2] c) NO2(g) + O2...
4. ### chemistry

Table of enthalpy of solution for selected cesium salts Compound and ΔsolH kJ mol-1: - Cesium bromide: 25.98 - Cesium iodide: 33.35 - Cesium chloride: 17.78 - Cesium fluoride monohydrate: -10.46 - Cesium fluoride sesquihydrate (·1.5H2O): -5.44 Data taken from CRC ...
5. ### Chemistry Help! Thank you :)

Assuming the final solution will be diluted to 1.00 , how much more should you add to achieve the desired pH? Information: Imagine that you are in chemistry lab and need to make 1.00 L of a solution with a pH of 2.80. You have in front of you: 100 ml of 7.00×10−2 M HCl...
6. ### Chemistry

Imagine that you are in chemistry lab and need to make 1.00 L of a solution with a pH of 2.70. You have in front of you * 100 mL of 6.00×10−2 M HCl, * 100 mL of 5.00×10−2 M NaOH, and plenty of distilled water. You start to add HCl to a beaker of water when ...
7. ### Chemistry

Chapter 3 41. How many significant figures are in each?
8. ### chemistry

What are the units for E minimum? with reference to what?
9. ### chemistry

why is CCl4 classified as a compound?
10. ### Chemistry

Is air a mixture or a coumpound?
11. ### Chemistry

Why air is classified as matter?
12. ### chemistry

What are some examples of a suspension?
13. ### chemistry

how can you find temperature of sodium?
14. ### chemistry

what is the exponent power of a liter??
15. ### Chemistry

Is there an equation for acid rain? What is it?
16. ### chemistry

the value of this quantity for water is ?
17. ### chemistry

what is produced when methane is burned ?
18. ### chemistry

convert 0.75 kilograms to milligrams
19. ### Chemistry

How many atoms of C are contained in 45.6g of C6H6?
20. ### chemistry

What is the hydroxide concentration if the hydronium is .03 M?
21. ### chemistry

how do you read this formula: 2Au2O3
22. ### chemistry

How do I figure out the mass of 1 M&M?
23. ### Chemistry

How many moles of CaCO3 are present in 30.6g of it ?
24. ### Chemistry

What is the mass of 8.25 * 10^19 UF6 molecules?
25. ### Chemistry

how would i find the pH of this? 1.0 M NH3 (Kb = 1.8 x 10-5)
26. ### Chemistry

How many electrons in an atom can have n=3, ml=+1 and ms=+1/2
27. ### chemistry

what is the flame test for nickel
28. ### chemistry

Why is the formal charge on B in BF4- is 1?
29. ### chemistry

what is an example of a solid hydrocarbon
30. ### Chemistry

What is enthalpy in layman's terms?
31. ### AP CHEMISTRY

how do i calculate theoretical yield?
32. ### Chemistry

what is the volume of the unit cell
33. ### Chemistry

What is electron configuration of Bi5+?
34. ### chemistry

how many moles of platinum are equivalent to 1.20 x 10^24
35. ### chemistry

when will a displacement reaction not occur?
36. ### Chemistry

what precipitate (if any) will form? Al(NO3)3 (aq) + Ba(OH)2 (aq)
37. ### chemistry

Why can water dissolve so many substances?
38. ### chemistry

why are ions of physiologic importance?
39. ### Chemistry

What is the Lewis structure for IF4-?

What is partial pressure?
41. ### chemistry

What is the pH of a 1.24 mol/L solution of HCN(aq) if its Ka = 6.2 x 10-10
42. ### Chemistry

Convert 125000 Pa to psi
43. ### chemistry

covert 19.4g NH3 to moles
44. ### organic chemistry

why can't you have 2-ethylheptane?
45. ### physics

What model is the basis for chemistry?
46. ### chemistry

what is c3h8 dioxide or hydrogen
47. ### chemistry

how many neutrons r there in a phosphorus atom
48. ### Chemistry

what is the pH level of an average lake
49. ### chemistry

Draw 5-methyl-3-heptene
50. ### chemistry

determine the pH of this solution. [OH-]=4.25 * 10^-5 M. Is the answer 4.37??
51. ### chemistry

give electron configuration for a> Na b) Na+ c) O d)O ^2-
52. ### chemistry

sorry Ksp of PbCl2 is 1.6 x 10-5
53. ### chemistry

what is average kinetic energy?
54. ### chemistry

Draw 1- fluoro 2- iodobenzene
55. ### Chemistry

How can i find the abundance of an isotope?
56. ### chemistry

What is the pH if the hydrogen-ion concentration is 6.8 x 10^-7 M?
57. ### chemistry

chemical technology definition
58. ### chemistry

chemical technology definition
59. ### chemistry

Atomic nature of glucose
60. ### chemistry

calculate the number of liters in 7.05 x 10 ^-2 m^3
61. ### chemistry

16.3g equals how many cg? someone helllllllllllp

what exactly is chemistry?
63. ### Chemistry

What si the pH of a solution of 10^-8 M HCl in H2O?
64. ### chemistry

what is not viewed with an electron microscope
65. ### chemistry

examples of suspension and solution
66. ### Chemistry

what is the formula to change the temperature of K to C
67. ### chemistry

What is the mass in grams of 14.6 amu?
68. ### Chemistry 101

How many kg of chlorine are in 23 kg of CF_2Cl_2?
69. ### chemistry

what is the 'big idea of energy'???!
70. ### chemistry

define organic compound?
71. ### Chemistry

At the equivalence point for CH3COOH, the pH will be?
72. ### chemistry

does fire have matter?
73. ### Chemistry

How do you find molar mass?
74. ### Chemistry

NaC2H3O2 (aq) + HCl (aq) = NaCl (aq) + ?
75. ### Chemistry!

Are hydrocarbons always nonpolar??
76. ### chemistry

can u tell me a slogan for flourine?
77. ### chemistry

What is the smalles t subatomic particle
78. ### Chemistry

what does excited states mean?
79. ### Chemistry

What is the diameter of a potassium atom?
80. ### chemistry

What is the ΔH0rxn. for NaNO3?
81. ### Chemistry

what is the big idea of energy
82. ### Organic Chemistry

1-Methylcyclohexene + HCl/Ph-O-O-PH -->

84. ### chemistry

what is the big idea of energy?
85. ### Chemistry

How does a ionic bond form?
86. ### Chemistry

Why does O3 have a dipole moment?
87. ### Chemistry

How Many Molecules are contained in 0.25 moles of Fe?
88. ### chemistry

How do I change grams to moles.
89. ### Chemistry

What is the weight/volume for a 0.2% solution?
90. ### chemistry

How to make a 2 Molarity solution?
91. ### chem

need help on chemistry below
92. ### chemistry

is iron sulhide malleable
93. ### Chemistry

How would you name the compound P4?
94. ### Chemistry`

1.35 x10^24 g to pounds and then to ounces
95. ### Chemistry

hOW can I convert 75.0 cmHg to atm? thanks
96. ### chemistry

2.05g k x___x___x___=____gkcl
97. ### Chemistry

What is the purpose of a nuclear reactor?
98. ### Chemistry

Give an example of a disaccharide
99. ### chemistry

Plz Help or give a highlight
100. ### chemistry

how many moles are in 25.0 grams of potassium?