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How many millimoles of KSCN is in 750 mL of 3.25×10-3 M solution?
How many moles of carbon are in 333 mg of CaC2O4.
Find the number of Na+ ions in 2.92 g of Na3PO4
1.It is a measure of how equally the electrons in a bond are distributed between the two atoms involved in a covalent bond.
A. polarity C. ionization energy
B. octet rule D. electron affinity
2.The reaction of water with alkene to produce an alcohol is a/an ______ reaction.
A. Addition C. Combustion
B. Condensation D. Saponification
3. The organic starting materials for the preparation of an ester could be_________
A. an acid and alcohol C. a ketone and alcohol
B. water and oxygen D. alkane and aldehyde
4. Ammonia (NH3), can be considered a Lewis base because it can donate what?
A. electrons C. protons
B. hydronium ions D. hydroxide ions
5. In the ground state of a cobalt atom there are _____ unpaired electrons and the atom is _____.
A. 3, paramagnetic
C. 2, diamagnetic
B. B. 5, paramagnetic
D. 0, diamagnetic
6.Which of the following bond is the strongest?
A. carbon – hydrogen bond C. carbon – carbon triple bond
B. carbon – nitrogen bond D. carbon – carbon single bond
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1.The equivalent resistance of two resistors Ri and Rz connected in parallel is given Rey = If R, = 100.0 +5% and R = 47.0 + 5%, find the expected maximum and minimum value of their equivalent resistance when they are connected in parallel.
2. A particle moves in a straight line such that its displacement, x meters, from a fixed point on the line at time t seconds is given by x = 40[e-2t - e-4]. (a) Find the time when the particle is instantaneously at rest. (b) Find the displacement of the particle from O when t = 3 s. (c) Find the total distance travelled during the first 3 seconds of its
1.The equivalent resistance of two resistors Ri and Rz connected in parallel is given Rey = If R, = 100.0 +5% and R = 47.0 + 5%, find the expected maximum and minimum value of their equivalent resistance when they are connected in parallel.
2. A particle moves in a straight line such that its displacement, x meters, from a fixed point on the line at time t seconds is given by x = 40[e-2t - e-4]. (a) Find the time when the particle is instantaneously at rest. (b) Find the displacement of the particle from O when t = 3 s. (c) Find the total distance travelled during the first 3 seconds of its
Twins Anna and Aayan are excited to be starting college next
year. Anna is leaving home behind and heading to college in Bangalore
while her brother Aayan is going to live at home and attend the local
university. Up till now they have always used cash or gift cards received for
holidays or birthdays to pay their expenses. Any savings they had was in
the piggy bank in their rooms. Now that college is almost there, they realize
that cash may not be the best option.
Required:
1. Why is cash not always a good option?
2. What should Anna consider when picking a bank? What about
Aayan? Do they have different needs?
A company has learned that by pricing a newly released toy at $7, sales will reach 3000 per day. Raising the price to $9 will cause the sales to fall to 2000 per day. Assume that the ratio of change in price to change in daily sales is constant and let x be the price of the toy and y be the number of sales.
a. Find the linear equation that models the price-sales relationship for this toy. [Hint: The line must pass through (7,3000) and (9,2000).]
b. Use this equation to predict the daily sales of the toy if the price is set at $8.50.
Find the equation of the line.
Through (3,−5); perpendicular to y=−10.
#339914 on Dec 2023