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What does the law of conservation of matter state?

Question #c7a04

How do buffers maintain pH?

What is a net dipole?

What is the mass in grams of #1.88 xx10^24# molecules #"CH"_2"O"#?

Question #1d433

Question #a405a

Does resonance occurs when more than one valid Lewis structure can be written for a molecule?

If nondisjunction occurs in humans for sister chromatids of one chromosome during Meiosis II, will any normal gametes result? What chromosome number would each gamete have?

How do you rewrite #34/9# as a mixed number?

A firefighter at the scene of a fire is holding a heavy hose out of which water is gushing. To keep her balance, she often has to lean. Which way does she lean, forward or backward, and why?

A fox starts from rest and accelerates at #1.1# #"m"*"s"^(2)"#. How long does it take the fox to cover #5.0# #"m"#?

Question #145c8

Question #cad22

Question #5ff55

If #"10 g"# of #"AlCl"_3"# decomposes, how many grams of #"Cl"_2"# will be produced?

Knowing the coefficient of kinetic friction between the two materials (0.03), he quickly calculates the normal force. What is it (in N)?

If the pH of CocaCola is 3.0 then it is considered to be what?

Question #b0b47

What is activation energy?

Question #54ab0

How do you use the Pythagorean Theorem to determine if the following three numbers could represent the measures of the sides of a right triangle: 20, 6, 21?

Laura got 84% of the 150 test questions right. How many correct answers did she have?

Question #6623e

What are the critical values, if any, of #f(x)=(3x^2+2x+5)/(4x^2+2x+1)#?

A beach store pays $11.40 for each beach umbrella. The store's percent of markup is 75%. How much is a beach umbrella?

What is a good thesis statement for the story "A&P" by John Updike? Is there more to the conflict than Sammy just sticking up for the girls?

How do you factorize completely #8x18#?

When DNA is replicated, or copied, the ladder splits as the bases separate. New units are added to each half of the DNA molecule. How does this create two identical molecules of DNA?

An object with a mass of #4 kg# is on a plane with an incline of #pi/12 #. If the object is being pushed up the plane with # 3 N # of force, what is the net force on the object?

Question #ad016

How do you graph #2x+4y=8# using intercepts?

Question #7af6d

What are the steps of lightdependent reactions of photosynthesis?

What is a thylakoid?

Is it possible for a cell to survive in oxygen deficient condition?

Question #daf1f

Question #8872a

Question #9bb82

What is the difference between the independent and dependent variable?

Bob is planning his motorcycle jump stunt over school buses. He plans to use a 400 angle jump, and leave the jump at 100 km/h. If he takes off and lands at the level of the school busesâ€ť roofs, and each school bus is 5m wide, how many school (cont)?

Question #0e704

Question #4a84c

What property of an object determines how much inertia it has?

How do you graph the inequality #5x+y>10#?

What process allows you to smell perfume at a distance from the source?

Question #43749

Why do you think it is important that biologists have a good understanding of chemistry?

The ages of John and Martha together are 28 years. If John is 4 years older than Martha. What is Martha's age?

Evaluate the limit by using a change of variable?

Using the periodic table, how can you tell how many valence electrons an element has?

Find the limit as h approaches 0?

If an atom is not oxidized or reduced during a redox reaction what does not change?

How do you solve this system of equations: #7x + y = 11; 10x  5y = 20#?

What is the rate limiting step in a chemical reaction?

What is the general formula of the alkanes?

How do nucleic acids function?

How are amino acids, polypeptides, and proteins related?

Polymers of the carbohydrate monomer glucose are used as the major form of energy storage for many plants. What are these glucose polymers called?

Where are the electrons found in an atom? Where are the protons found in an atom?

What is a double replacement reaction? How are they different between single replacement reactions?

What are the resonance structures for #CO_3^2#?

How do you give the six trigonometric function values of 5pi/3?

Prove that #2(log_10 51)=log_10 (1/4)#?

How do you simplify #4x+4(9x2)3#?

Question #b3b8d

Question #4d779

Question #4120e

Question #1c99a

How do you convert #1.75# from radians to degree?

What is the molar mass of iron?

What is the collision theory of chemical reactions?

A lake has a low pH. Is it acidic or basic? Would fish be healthy in this lake?

Which of the following cations is least likely to form: #Sr^(2+)#, #Al^(3+)#, #K^(2+)#? Why?

How do you evaluate sine, cosine, tangent of #pi/4# without using a calculator?

Suppose that $2000 is invested at a rate of 3.7%, compounded semiannually. Assuming that no withdrawals are made, find the amount after 3 years total?

What has more energy: a solid or liquid?

What molecular geometry do you have if you have one lone pair and two bonding electron groups?

Abag contains green marbles and blue marbles, 16 in total. The number of green marbles is 8 less than 2 times the number of blue marbles, How many green marbles are there?

What is the conjugated base in the following acid/base reaction: #CH_3COOH + H_2O rightleftharpoons H_3O^+ + CH_3COO^#?

Question #85b84

How would you arrange the following elements from largest to smallest in atomic radii: S, Al, Ar, Mg, P?

How do you solve #59= 7 4m#?

Once a certain medicine is in the bloodstream, its halflife is 21 hours. How long will it be before an initial 30cc of the medicine has been reduced to 7cc?

How many mols are in 10.269 g of #Al_2(SO_4)_3#?

How do you solve #0.09t  3.6= 1.44#?

In a solid, what is the state of the particles?

How many double bonds are in #SO_2#?

4790 joules of heat are added to 222 grams of water originally at 27.7 C. What is the final temperature of the water?

The Titanic Toy Company has a 4% return rate on its products. How do you write this percent as a fraction in simplest form?

Louise and Frank are each collecting baseball cards. If Louise has three times as many cards as Frank and she has 84, how many cards does Frank have?

How do you solve #2r + 2( 3r  2) = 17#?

What category of organisms can mate and produce fertile offspring?

What source causes the most air pollution?

The sum of two numbers is 32. One of the numbers is 4 less than 5 times the other. How do you find the two numbers?

Question #09342

How many valence electrons does K have?

What do the arrows in a food chain represent?

How do you solve #5\sqrt { 12} + 6\sqrt { 20}#?

How many unpaired electrons are in a magnesium atom?

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