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2 Al + 3 CuCl₂ → 2 AICI3 + 3 Cu
Molar masses: 27.0 g/mol Al,
134.5 g/mol CuCl2, 63.5 g/mol Cu
A: How many grams of CuCl₂ are
necessary to consume 10 g Al?
If F(x) 1/39(3x-2)2;0<_x_<3
O: elsewhere
1. Verify that F(x) is a PDF
2. find E(x) and Var(x)
Identify oxidizing agent and reducing agent in the reactions.
1. 2Na2S2O3 + I2 → Na2S4O6+ 2Nal
2. N2+ 3H2 → 2NH3
3. 2FeCl3 + H2S → 2FeCl2 +S + 2HC1
4. 2 Cr3 + H2O+ 6CIO3 → Cr2O72 + 6CIO2 + 2H+
5. 3Mg + N₂ → Mg3N2
Convert ((1−i)/2) into trigonometric form.
If z=8(cos5π3+isin5π3), then z6 is equal to
The formula h (t) = -4.9t² + 20t+ 80 gives the height (h) above ground in meter (m) of an object thrown at t=0, straight upwards from the top of a tower 80m height.
1)What is the height point reached by the object ?
2) After how many seconds does the object hit the ground?
This question is based on projectile.
write a program that input a series of 500 numbers in ID array later find and display the minimum values and maximum values and average of all numbers
Override toString() in the Student and Employee classes. For example, if a Student object is created like this:
Student student = new Student("Maria",18,"BSIT",1);
then the Student class’ toString() method will return this string:
Maria 18 BSIT 1
The amount of coffee dispensed by a vending machine is assumed to be normally distributed, A vendor claims that the mean amount of coffer dispensed by the machine is 6 ounces per cup. The office manager doubted this claim. He randomly selected 25 cups of coffee from this machine and recorded the amount of coffee dispensed in each. The sample mean is 5.8 ounces with a standard deviation of 0.8 ounces, do the data provide sufficient evidence to indicate that the mean amount of coffee dispensed is not equal to 6 ounces per cup use 0.05 level of significance.
2. A sample of 40 sales receipts from a grocery store has sample mean of 137 and population sd= 30.2. Use these values to test whether or not the mean sales the grocery store is less than 150. Use a 95% confidence level
