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If a 8.6195 g of a mixture which contains (20.0 % of CuSO4.XH2O and 80.0 % of sand) was heated ina crucible then cooled in the
1. 2 answers
2. 684 views
A thermometer scale is calibrated (marked off) in a degree Celsius from 1 oC to 50 oC. Determinehow many significant figures
1. 1 answer
2. 609 views
When 85.0 g of CH4 are mixed with 160. g of O2 the limiting reactant is __________.CH4 + 2O2 �¨ CO2 + 2H2O A) CH4 B) O2 C) CO2
1. 3 answers
2. 10,964 views
When 3.05 moles of CH4 are mixed with 5.03 moles of O2 the limiting reactant is __________.CH4 + 2O2 �¨ CO2 + 2H2O A) CH4 B)
1. 2 answers
2. 3,902 views
A 0.0677 g sample of magnesium metal reacted with excess hydrochloric acid solution to produce69.9 mL of hydrogen gas. The gas
1. 0 answers
2. 867 views
A brick weight 17.8N and is resting on the ground. Its dimensions are 0.203mx0.089mx0.0570m. A number of the bricks are then
1. 1 answer
2. 582 views
- A copper cylinder is initially at 20.0oC. At what temperature will its volume be 0.15% larger than it is at 20.0oC? Take:
1. 3 answers
2. 8,940 views
A substance is heated from –12.0oF to 150.0oF. What is its change in temperature on (a) the Celsius scales,(b) the Kelvin
1. 1 answer
2. 725 views
A steel beam is used in the construction of a skyscraper. By what fraction ƒ´L/Lo does the length of the beam increase when
1. 0 answers
2. 518 views
On a new temperature scale the steam point is 348 °X, and the ice point is 112 °X. What is the temperature on this scale that
1. 0 answers
2. 895 views
- The Mariana trench is located in the Pacific Ocean at a depth of about 11000 m below the surface of the water. The density of
1. 0 answers
2. 618 views
(a) Calculate the average blood velocity in the major arties given that the aorta has a radius of 1.0 cm, the blood velocity is
1. 0 answers
2. 643 views
Blood is pumped from the heart at a rate of 5L/min into the aorta of radius 2.0cm. Assuming that the density of blood 1x103
1. 2 answers
2. 2,938 views
A dentist’s chair with a patient in it weight 2100N. The output plunger of a hydraulic system begins to lift the chair, when
1. 1 answer
2. 917 views
Suppose that blood flows through the aorta with a speed of 0.35 m/s. The cross-sectional area of the aorta is 2.0x10-4 m2. (a)
1. 2 answers
2. 2,169 views
A solid object floats on ethyl alcohol, with 68.2%of the object’s volume submerged .Find the density of the object. Take
1. 3 answers
2. 837 views
A solid cylinder has a radius of 0.051 m and a height of 0.0030. The cylinder is composed of two different materials with mass
1. 1 answer
2. 2,846 views

Answers (5)

please help me ,becauce i have final exam tomorrow
Thank you ^__^
Thank you very much ^__^
Oh ,,I am sorry , I mean science
math ..

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