# chemistry! URGENT

61,729 results, page 30
1. ## chemistry help!

I have a chemistry test tomorrow and I'm trying to study but none of these questions in the book make sense to me:( Help! 1. Commericially available concentrated sulfuric acid is 95% H2SO4 by mass and has a density of 1.84g/mL. How many milliliters of this
2. ## Math *URGENT

Please give the answers and solutions for each. 1.If the second term is 2 and the seventh term of a geometric sequence is 64, find the 12th term. 2. Which term if the geometric sequence 18,54,162,486,... is 3,188,646? 3. Determine the geometric mean of 8
3. ## cHEMISTRY

wHAT IS THE SYMBOL FOR THE ION WITH 13 PROTONS AND TEN ELECTRONS? CAN U EXPLAIN HOW TO GET YOUR ANSWER, AND CAN YOU GIVE ME A WEBSITE THAT HELPS ME WITH CHEMISTRY 13 protons will be element with atomic number of 13. Look on the periodic table and see
4. ## Chemistry

I need serious help with 3 different chemistry problems: 1. If coal is assumed to be all carbon, carbon has a molecular weight of 12 lb-mass/lb-mol, and oxgyen (diatomic) has a molecular weight of 32 lb-mass/lb-mol, how much carbon dioxide (lb-mass/day) is
5. ## Chemistry

Hi, This is a challenge question for my intro chemistry class and I'd really like to do it. Its in 2 parts. 1. Consider a 2790-lb automobile clocked by law-enforcement radar at a speed of 85.5 mph (miles/hour). If the position of the car is known to within
6. ## chemistry

Determine the number of bromide ions in solution when 4.23 g of magnesium bromide and 1.21 g of potassium bromide are dissolved in 120mL of water. Please explain not sure how to even start this problem, thanks! chemistry - DrBob222, Wednesday, December 8,
7. ## mathematics

in a class of 60 students, the number of students who passed biology is 6 more the number of student who passed chemistry. Every student passed at least 1 subject and 8 passed both subject. How many passed chemistry
8. ## Chemistry

A student finds a medallion which could be made of pure platinium or silver. IN order to find out what the medallion is made of the student takes the medallion to a chemistry lab. The student measures the density of the medallion as follows. The medallion
9. ## CHEMISTRY

I just took a chemistry midterm and our teacher let us keep the exam. I was wondering if you could let me know if I was right or wrong for the following questions. I can ask my professor later for details. Which of the following are best described as
10. ## Chemistry

2.36 x 10^4 s= ? days
11. ## Chemistry

What is a enantiomer?
12. ## chemistry

what is saponication
13. ## chemistry

what is mmHg?
14. ## chemistry

2.35*10^-4M,,Mg(OH)2 what is the pH of this solution
15. ## chemistry

For n = 2, one of the values of l is 0
16. ## chemistry

comparetheentrophybetweenco2gch4g
17. ## chemistry

WHat is a precipitate?
18. ## Chemistry 12

The [OH-] of a solution with a PH 5.75 is is it 5.6*10-9M?
19. ## Chemistry

Fe+o2+h2o->fe(oh)3

21. ## chemistry

28.06 mL to grams
22. ## chemistry

What is the pH of 6.6 X 10^4 M HCL?
23. ## chemistry

What are the uses of azomethine?
24. ## chemistry

1000 mm = how many km
25. ## chemistry

.001 Ml= how many mL

Al(oH)3+HcL=

6.04g
29. ## Chemistry

THERE IS NOTHING WRONG WITH ME!!!!!!!!
30. ## chemistry

how many electrons can n=4 l=1 have?
31. ## chemistry

what is nitrolim and is uses?
32. ## AP Chemistry

what does pv/nRT tell you?

44:65f
34. ## Chemistry

How many different f orbitals are there?
35. ## chemistry

what is 1.79 x 10^-20 in kJ/mol?

science
37. ## chemistry

What is the pH of a solution if [H+] = 2.3 x 10–5 M?
38. ## chemistry

I got kc to be 0 but that has got be wrong
39. ## chemistry

what is an atom
40. ## AP Chemistry

The pH of a solution of Sr(OH)2 is 12.42. What is its (OH^-)
41. ## Chemistry

How do i solve [A]=[A]0 x e^-kt for k
42. ## chemistry

what is molality ?
43. ## chemistry

what is molality ?
44. ## chemistry

Al is the symbol for
45. ## Chemistry

If §¤= 1, what can you deduce about n? n=1 n>1 n¡Ã1 n<1 n¡1 If m§¤ = 3, what can you say about §¤? §¤=3 §¤>3 §¤¡Ã3 §¤<3 §¤¡3
46. ## chemistry

How does pH = 8.75 give (H^+) = 1.77 x 10^-9
47. ## chemistry

how would I name the compund Ca(OH)2
48. ## Chemistry

Find the Ph: of 7.01 x 10-5 M Ba(OH)2 thanks:)

44:65f
50. ## chemistry

name 2 alkalis
51. ## chemistry?

why does Si-28 contain 14 neutrons?
52. ## chemistry

1228g/l to g/ml

Ba Ba2+
54. ## Chemistry

What is C2H5OH?

chemistry
56. ## Chemistry

What is a supernatant

AMU ?
58. ## chemistry

DOES Mg(OH)2 HAVE A pH greater than 7 or less than 7
59. ## chemistry

I say unsaturated. Am I right?

Fe + K2CO3
61. ## chemistry

reinforcement??????????????????? help
62. ## chemistry

What is H+(aq) + –OH(aq) H2O(l)
63. ## chemistry

convert 3.0m to yd
64. ## chemistry

AuCI,(aq)+Ca(s)=

46,318.97
66. ## Chemistry

Define a.m.u?
67. ## chemistry

what is cryogenetics
68. ## chemistry

i think I am not doing this part right (1/n5^2 - 1/n1^2)

compare
70. ## Chemistry

what are dipoles?
71. ## chemistry

what's malleability
72. ## chemistry

What's an example of suspensionn?

G=NEV
74. ## chemistry 12

what is the relationship between ka and kb? Kw=ka*kb
75. ## chemistry

how do you know that Al(OH)3(s) is a base?

hellop
77. ## chemistry

1.what are the functions of pH?
78. ## chemistry

Just wanted to say thank you very much for the help I got from everybody :)
79. ## chemistry

How does pH = 8.75 give (H^+) = 1.77 x 10^-9.

81. ## chemistry

What is periodicity.
82. ## Chemistry

Define a.m.u?
83. ## CHEMISTRY

The [OH1-] with a pH of 5 is
84. ## chemistry

what is fe+s+hcl=
85. ## chemistry

WHAT IS HS2SO4
86. ## Chemistry

What is 6.35 g divided by 6.02 x 10^23
87. ## Chemistry

When n=3, the possible values of l are: 5, 4, 3, 2, 1, and/or 0? How do you know?
88. ## chemistry

what is a catalyst
89. ## chemistry

why cant Na be used to prepare H2?
90. ## chemistry

When is there a need to determine G? A. When H > 0 and S < 0 B. When H > 0 and S = 0 C. When H > 0 and S > 0 D. When H = 0 and S < 0
91. ## chemistry

i HAVE A QUESTION
92. ## chemistry

what is a mole

0.600 mL= L
94. ## Chemistry

How would you name the compound P4?
95. ## Chemistry

What is Enthalpy?

97. ## chemistry

How many moles are there in 23.6g Ag?
98. ## chemistry

what is a compuond?

yrjtukj
100. ## chemistry

what are isotopes???