Science & Mathematics - 11 October 2006

2006-10-11 23:54:24 · 35 answers · asked by Sadaf M 1 in Mathematics

2006-10-11 23:52:03 · 14 answers · asked by MiB 1 in Other - Science

Anyone knows how to design one? need to deposit whole nuts; hazel, almond, cashew & raisin on 50 g, 100g, 200g chocolate?

2006-10-11 23:49:39 · 2 answers · asked by Charles T 1 in Engineering

2006-10-11 23:45:58 · 6 answers · asked by Buzz 1 in Mathematics

i always seem to be able to get another slice of toast out of the jar that i thought i should throw. Can't they be designed better, with aniti stick sides ?

2006-10-11 23:44:58 · 12 answers · asked by Anonymous in Engineering

2006-10-11 23:43:33 · 12 answers · asked by Anonymous in Astronomy & Space

2006-10-11 23:41:07 · 9 answers · asked by mhale88 1 in Astronomy & Space

There are 14 people at the supermarket. 7 of them bought apples. 5 of them bought oranges. 4 of them bought neither. how many of them bought both types of fruits?
from p4 pupil & please explain your answer.

2006-10-11 23:37:31 · 10 answers · asked by preethi 1 in Mathematics

answer dis question and i ll choose ur answer as the best one...

2006-10-11 23:35:15 · 25 answers · asked by Anmol v 1 in Biology

4 or 5 letter word....

2006-10-11 23:33:44 · 10 answers · asked by Anonymous in Mathematics

Could there have been a dramatic change on this earth that wiped out a previous civilisation and left no trace of it behind? How could this theory be proved or disproved?

2006-10-11 23:33:16 · 4 answers · asked by Anonymous in Earth Sciences & Geology

Explain how x to the power of m and x to the power of n is equal to x to the power of m+n. Show how this is true using the meaning of exponents and multiplication. Use numerical examples to show it is true.

2006-10-11 23:32:52 · 4 answers · asked by thelmadc06 1 in Mathematics

In which of the following materials is the velocity of light greatest?

A. Air
B. Water
C. Crown glass
D. Fused quartz

2006-10-11 23:22:30 · 18 answers · asked by djat20 2 in Physics

2006-10-11 23:20:02 · 5 answers · asked by zyvyxlady 1 in Physics

2006-10-11 23:15:57 · 6 answers · asked by bliss25 1 in Botany

2006-10-11 23:14:21 · 10 answers · asked by Carl 1 in Physics

Define the temperature, time at heat, quenching medium, quench temperature and the tempereing temperature.The material is 9 Cr-1 Mo steel.

2006-10-11 23:11:06 · 3 answers · asked by abang 1 in Engineering

2006-10-11 23:05:58 · 8 answers · asked by Mr. Owl 3 in Mathematics

2006-10-11 23:05:26 · 17 answers · asked by Perseus 3 in Zoology

2006-10-11 23:02:01 · 5 answers · asked by Carl 1 in Physics

One year is because earth comlplet it one revolution around earth. Then what is significance of week & month?

2006-10-11 23:01:47 · 7 answers · asked by dr sachpw 3 in Earth Sciences & Geology

2006-10-11 23:00:47 · 8 answers · asked by jessica j 1 in Medicine

After giving 2/7 of his marbles to his brother and 2/5 of the remainder to his sister,Ji has 96 marbles How many marbles he have at first?

2006-10-11 22:59:10 · 6 answers · asked by preethi 1 in Mathematics

2006-10-11 22:56:19 · 13 answers · asked by RyE 1 in Physics

2006-10-11 22:54:36 · 14 answers · asked by Anonymous in Botany

2006-10-11 22:54:11 · 3 answers · asked by Carl 1 in Physics

THIS IS MULTIPLE CHOICE
Q1. A sample of carbon dioxide has a volume of 12.4 L at 650 torr. If the temperature is held constant, what volume does it have at 3.2 atm?
4.5 L 3.3 L 26 L 46 L 0.30 L

Q2. A 3.00 L sample of argon has a pressure of 345 kPa at 55.0°C. What volume would the sample have if the pressure is 0.839 atm and the temperature exactly 0°C?
22.4 L
10.1 L
1030 L
60.4 L
0.615 L

Q3. A 5.00 L sample of xenon gas has a pressure of 155 torr at -90oC. What mass of Xe is present?
0.088 g 8.92 g 4.53 g 6.78E3g 18.1 g

Q4. Ammonia burns in air as follows:
4NH3(g) + 3O2(g) → 2N2(g) + 6H2O(g)
How many liters of nitrogen are formed by burning 2.50 L of ammonia in excess oxygen with all species at the same temperature and pressure?
2.00 L 2.50 L 1.25 L 5.00 L 0.625 L

Q5. Hydrochloric acid is prepared by bubbling hydrogen chloride gas through water. What is the concentration of a solution prepared by dissolving 225 L of HCl(g) at 37°C and 672 torr in 5.25 L of water?
1.49 M 1.66 M 7.82 M 12.5 M 16.6 M

Q6. Which of the following gases will be the fastest to diffuse through a room?
sulfur dioxide hydrogen sulfide carbon dioxide water neon

Q7. A sealed container contains 2.0 g of hydrogen and 56 g of nitrogen gas. If the total pressure in the container is 1.5 atm, what is pressure exerted by each gas?
H2 = 1.0 atm and N2 = 0.50 atm
H2 = 0.50 atm and N2 = 1.0 atm
H2 = 1.0 atm and N2 = 2.0 atm
H2 = 2.0 atm and N2 = 1.0 atm
There is not enough information given to answer the question.

Q8. The interhalogen compound chlorine trifluoride can be prepared by direct combination of the elements:
Cl2(g) + 3F2(g) → 2ClF3(g)
If 2.00 L of chlorine at 1.20 atm are mixed with 2.00 L of fluorine at 3.10 atm in a 5.00 L flask at 240oC, what is the partial pressure of the reactant remaining, assuming 100% yield?
0.253 atm F2
0.067 atm Cl2
0.827 atm Cl2
0.758 atm F2
0.0333 atm Cl2

Q9. Which of the following gases has the greatest average kinetic energy at 350 K?
Xe Ne Ar CH4 all have the same average kinetic energy

Q10. At 25oC, which of the following gases has the largest average velocity?
He Ne O2 N2 Cl2 All have the same average velocity

Q11. The time requried for 0.010 moles of SO3(g) to effuse through an opening was 22 s. Under the same conditinos, an unknown gas required 28 s. The unknown gas is
Xe UF6 SiF4 CF4 SF6

Q12. The density of the vapor of a volatile organic compound is 0.371 g/L at 18.5 kPa and 300.oC. What is the molar mass of the gas?
694 g/mol 135 g/mol 943 g/mol 95.5 g/mol 50.0 g/mol

2006-10-11 22:51:35 · 17 answers · asked by ibrakeforchucknorris 1 in Chemistry

When an object is placed 8 millimeters from a concave spherical mirror, a clear image can be projected on a screen 16 millimeters in front of the mirror. If the object has a height of 4 millimeters, the height of the image is

A. 2 millimeters.
B. 4 millimeters.
C. 8 millimeters.
D. 12 millimeters.

2006-10-11 22:49:22 · 9 answers · asked by djat20 2 in Chemistry

Can you please give solution in detail

2006-10-11 22:44:23 · 5 answers · asked by abhi_madhani 3 in Mathematics

2006-10-11 22:41:59 · 6 answers · asked by zyvyxlady 1 in Physics