Questions and answers by

Dalal

Questions (20)

Find the power series representation about the center c=0 of(a) f(x)= 1/(1+x^2) (b) Use part (a) to find the power series of
1. 1 answer
2. 1,266 views
Consider the polar curve: r=3cos(3ϴ)a) Find the area of the first leaf of the graph. -Thank you.
1. 1 answer
2. 764 views
Use the generalized compressibility chart to estimate z for (a) nitrogen at 40°C and 40 MPa and (b) helium at -200°C and 350
1. 0 answers
2. 1,173 views
5.00 g of (Zn) was added to 0.800 moles of nitrate ion in acidic media.Calculate the volume of (NO) gas collected at STP. Zn(s)
1. 2 answers
2. 447 views
A 5.00-g sample of KBr at 25.0 C dissolves in 25.0 mL of water also at 25.0 C. The final equilibrium temperature of the
1. 2 answers
2. 1,458 views
a 20.94-g sample of an unknown metal is heated to 99.4 degrees Celsius in a hot water bath until thermal equilibrium is reached.
1. 1 answer
2. 3,427 views
A water chemist obtained a 250 ml sample from a nearby lake and fixed the oxygen on-site with alkaline solutions of MnSO4 and
1. 3 answers
2. 2,590 views
Need help, please.A copper wire (density = 8.96 g/cm^3) has a diameter of 0.25 mm. If a sample of this copper wire has a mass of
1. 1 answer
2. 1,289 views
A graduated cylinder has a mass of 80.4 g when empty. When 20.0 mL of water is added, the graduated cylinder has a mass of 100.4
1. 2 answers
2. 3,325 views
Thanks in advance.A student prepared a solution of NaCl by dissolving 55.0 grams of sodium chloride in 570 mL of water. What is
1. 1 answer
2. 1,380 views
Which of the following pairs of compounds can be used to illustrate the law of multiple proportion?a) NH3 and NH4Cl b) ZnO2 and
1. 2 answers
2. 4,214 views
Several compounds containing only sulfur (S) and fluorine (F) are known. Threeof them have the following compositions: i. 1.188
1. 3 answers
2. 5,568 views
Write the formula for each of the following compounds:a. cesium bromide b. barium sulfate c. ammonium chloride d. chlorine
1. 3 answers
2. 1,024 views
Name each of the following compounds:a. CrO3 c. Al2O3 e. CaBr2 b. Cr2O3 d. NaH f. ZnCl2
1. 4 answers
2. 705 views
The mass of a dry, 50 mL beaker is 49.135 g. The observed volume of water in a volumetric pipet is 20.00 mL. This water is
1. 5 answers
2. 4,019 views
Convert 0.0904 in^3 to liters.(2.54 cm = 1 inch, 1 L= 1000 cm^3, 1 ft = 12 inches) Really appreciate it if you can show steps
1. 0 answers
2. 490 views
A copper wire (density=8.96 g/cm^3) has a diameter of 0.25 mm. If a sample of this copper wire has a mass of 22 g, how long is
1. 1 answer
2. 3,826 views
Which of the following are exact numbers?a. There are 100 cm in 1 m. b. One meter equals 1.094 yard. c. We can use the equation:
1. 1 answer
2. 2,369 views
A student performed an analysis of a sample for its calcium content and got the following results:14.92% , 14.91%, 14.88% ,
1. 4 answers
2. 3,830 views
Two workers pull horizontally on a heavy box, but one pulls twice as hard as the other. The larger pull is directed at 25.0 ∘
1. 0 answers
2. 882 views