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Questions (63)

In Europe, gasoline efficiency is measured in km/L. If your car's gas mileage is 21.0 mi/gal , how many liters of gasoline would
1. 1 answer
2. 2,618 views
Bob and Doug play a lot of Ping-Pong, but Doug is a much better player, and wins 90% of their games.To make up for this, if Doug
1. 0 answers
2. 1,100 views
please help :(Bob and Doug play a lot of Ping-Pong, but Doug is a much better player, and wins 90% of their games. To make up
1. 1 answer
2. 1,450 views
Suppose that the sequence x0, x1, x2... is defined by x0 = 1, x1 = 5, and xk+2 = 3xk+1+10xk for k≥0. Find a general formula
1. 2 answers
2. 3,548 views
How can we differentiate MMPs from different proteolytic enzymes
1. 0 answers
2. 328 views
Find all complex numbers z satisfyingz3 = 27i and give your answer as a comma-separated list of values in the form a+bi.
1. 1 answer
2. 4,088 views
please help me with this question I have no idea how to solve it, thanksSuppose T is a transformation from ℝ2 to ℝ2. Find
1. 1 answer
2. 4,050 views
Find the scalar equation for the plane passing through the points P1=(−3, −5, 5), P2=(1, −6, 6), and P3=(0, −9, 4).
1. 1 answer
2. 1,694 views
Let L be the line passing through the point P=(1, −1, −5) with direction vector →d=[−2, −4, 3]T, and let T be the
1. 2 answers
2. 3,753 views
can anybody help me with this question please?Let L be the line passing through the point P=(5,Â âˆ’5,Â 3) with direction
1. 0 answers
2. 560 views
I spent hours on this and I still cant figure it out please help me:Let L1 be the line passing through the points Q1=(4, 2,
1. 3 answers
2. 723 views
Let L1 be the line passing through the points Q1=(−2, 1, 1) and Q2=(−4, 4, 0) and let L2 be the line passing through the
1. 1 answer
2. 691 views
Plus or minus of 0.05: As measured in standard deviations, how much is a year of learning in school worth on a test? Please
1. 1 answer
2. 614 views
A major hurricane with wind speeds of 111 per hour or greater. During the last century the mean number of major hurricanes to
1. 0 answers
2. 686 views
When NH3 is treated with oxygen gas, the products obtained are N2(g) and H2O(l). If standard enthalpies of formation at 298 K
1. 1 answer
2. 805 views
If u carry out a SWOT analysis you should know the " O" stands for a) outliers. B) opportunities c) outlines d) oddities
1. 1 answer
2. 477 views
why it is important to take care of the eyes and go for a regular checkup?
1. 1 answer
2. 399 views
pH = 3.89calculate concentration of hydronium ion and hydroxide ion in solution.
1. 2 answers
2. 1,435 views
Sven is thinking if two numbers. The sum is 12 . The difference is 4. What are the two numbers
1. 1 answer
2. 911 views
estimate the sales tax and final cost of a book that costs $12.99 with a sales tax of 6%
1. 2 answers
2. 443 views
When compared to compound B, compound A has lower melting and boiling points and vaporizes more readily. Is compound A an ionic
1. 2 answers
2. 664 views
Which of the following consists of positive and negative ions bound together and held in place in a crystalline solid?A.
1. 1 answer
2. 479 views
Is diphosphorus pentoxide an ionic or a molecular compound?A. Ionic B. Molecular I say B
1. 1 answer
2. 2,630 views
Which phase of ionic compounds are good electrical conductors because the ions are free to carry electrical current?A. Solid B.
1. 1 answer
2. 553 views
Which ion is absorbed by a base in water?A. H3O+ B. OH- C. Neutron D. Transition metal B
1. 1 answer
2. 330 views
What is usually indicated by an -ite or -ate ending in a chemical formula?A. The compound carries a net ionic charge of zero. B.
1. 1 answer
2. 793 views
When solving for the percent composition of a given compound, the percent of each element in the compound must be found and
1. 0 answers
2. 422 views
127.1 g Cu combines completely with 32.1 g S to form a compound. What is the percent composition of this compound?A. 20% Cu; 80%
1. 1 answer
2. 488 views
If there is a 75.0 g quantity of carbon present in each 100 g of a carbon and hydrogen compound, what is the percent composition
1. 1 answer
2. 479 views
In order for the percent composition of a compound to be calculated, the molar mass of the compound and the chemical formula
1. 1 answer
2. 504 views
What is the percent by mass of hydrogen in C3H8?A. 8.0% B. 18.2% C. 80.0% D. 81.8% I say B
1. 2 answers
2. 1,222 views
How is percent composition calculated?A. Dividing the mass of each element in the compound by the total mass of the compound and
1. 1 answer
2. 596 views
What is one mole of H2O composed of?A. 2 hydrogen atoms and 1 oxygen atom B. 2 × (6.02 × 1023) hydrogen atoms and 6.02 ×1023
1. 1 answer
2. 835 views
If there is a 75.0 g quantity of carbon present in each 100 g of a carbon and hydrogen compound, what is the percent composition
1. 0 answers
2. 469 views
What is the percent by mass of oxygen in H2O?A. 11.1% O B. 50.0% O C. 88.9% O D. 95.0% O I think C
1. 1 answer
2. 698 views
Convert 1,144 oF to oCA. 617.8 B. 617.8 oC C. −617.8 oC D. −617.8 I say B
1. 1 answer
2. 338 views
Solve the following and express the answer in scientific notation:(3.5 x 10^6 / (4.2 x 10^8)A . -8.3 X 10^-3 b. 8.3 X 10^3 c.
1. 1 answer
2. 918 views
Solve the following and express the answer in scientific notation: 10^3 x 10^4.A. 10-^1 B. 10^1 c. 10^6 D. 10^7 I say D
1. 1 answer
2. 377 views
To add numbers using scientific notation, multiply the coefficients and then add the exponents. true or falsetrue
1. 1 answer
2. 444 views
Solve the following and express the answer in scientific notation: (5.4 x 10^4) - (2.5 x 10^6)A. -2.45 x 10^6 B. 2.45 x 10^6 C.
1. 1 answer
2. 469 views
Solve the following and express the answer in scientific notation: 10^3 x 10^4 x 10^-2A. 10^5 B. 10^6 C. 10^7 d. 10^8 I say A
1. 1 answer
2. 387 views
Solve the following and express the answer in scientific notation: (5.3 x 10^4) + (2.2 x 10^3)A. 5.5 x 10^4 B. 7.5 x 10^3 C. 7.5
1. 1 answer
2. 479 views
The melting point of helium is -272.2 oC. Express this temperature in kelvins.A. -272 K B. -8.0 K C. 0.8 K D. 545 K I say D.
1. 1 answer
2. 363 views
what is the mass of 1.00 L of ethanol? Ethanol has a density of 0.798 g/ml. (hint: one liter is 10^3 mL.)A. 0.789 g B. 789 g C.
1. 1 answer
2. 874 views
what is the mass of 12.0 ml of a substance with the density of 0.922 g/cm3?A. 1.11g B. 0.11g C. 11.1 g I think C.
1. 1 answer
2. 383 views
what is the specific gravity of a substance that has a density of 1.59 g/cm3?A. 1.59 g/mL B. 1.59 g C. 1.59 D. 1.59 mL I think
1. 1 answer
2. 1,223 views
if the density of .88 grams of mercury is 13.6 g/ml, what is the volume?A. 0.065 mg B. 0.065 C. 0.065 ml D. 0.065 L I think its
1. 1 answer
2. 426 views
If melted butter were poured into a glass of milk and allowed to rest, two distinct layers would be visible. How would these
1. 1 answer
2. 484 views
If the density of 1.77 grams of gold is 19.3 g/mL, what is the volume
1. 1 answer
2. 357 views
Mercury has a density of 13.6 g/cm^3. What is the specific gravity of mercury?A. 13.6 g B. 13.6 cm C. 13.6 cm^3 D. 13.6
1. 2 answers
2. 1,501 views
In scientific notation, a number is written as the product of a coefficient and the number 10 raised to a power.True False
1. 1 answer
2. 524 views
Solve the following and express the answer in scientific notation: (5.4 × 10^4) × ( 4.5 × 10^8)
1. 1 answer
2. 481 views
The following sentence shows what element of poetry? Her fiery eyes swept away his heart.A. Imagery B. Figure of speech C.
1. 3 answers
2. 524 views
What word best describes the Realist's and Modernist's perspective on the world?A. Objective B. Passionate C. Subjective D.
1. 2 answers
2. 448 views
Which literary movement consists of honest and open descriptions the setting and characters? I say B.A. American Modernism B.
1. 2 answers
2. 643 views
if a data set has mean 70, and standard deviation 5, is 80 asuspect outliner/
1. 1 answer
2. 661 views
6.8 in fraction notation
1. 1 answer
2. 371 views
Trains a and b are traveling in the same direction on parallel tracks. Train a is traveling at 40 mph and train b is traveling
1. 0 answers
2. 584 views
what dose tengo sed puedo ira
1. 1 answer
2. 398 views
what are energy bar graphs?
1. 2 answers
2. 384 views
a pickup truck has a main tank with a 17 3/4 gallon capacity and an auxiliary tank which holds 15 1/8 gallons. if the truck gets
1. 1 answer
2. 1,133 views
Does flowers store food?
1. 1 answer
2. 435 views
Compare the adolescence period in the United States with that of other nations. Compare and contrast any ritualistic (rites of
1. 0 answers
2. 608 views

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