Chemistry » Page 82

Chemistry

Briana Cabrera

0710

A missile is flying at a speed of 125 m/s. If the missile has a

mass of 125 kg, what's its kinetic energy? Keep 4 significant

figures.

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Chemistry

Adalyn Zuniga

After observing a moth that is camouflaged against dark colored bark, a scientist asks a question.?

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Chemistry

Cricket

What is the number of formula units in a 5.53 mol sample of NH4NO3?

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Chemistry

Adriel Cantrell

Salt is added to water. You speed up dissolving by stirring the salt into the water. Then your teacher challenges you to separate the salt from the water. You know that the salt and water have formed a solution and that the salt is distributed throughout the glass of water. What would be the BEST way to separate the salt and the water?

A) Collect the slat as it floats in the water.

B) Heat the solution to boiling and evaporate off the water.

C) Spin the solution at a high speed to separate out the salt.

D) Pour the solution through filter paper to filter out the salt.

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Chemistry

Abagail Lowery

A sample of table sugar (sucrose, C12H22O11) has a mass of 1.202 g.

a.

Calculate the number of moles of C12H22O11 contained in the sample and record in Table 1. Show your work.

b.

Calculate the moles of each element in C12H22O11 and record in Table

1. Show your work.

c.

Calculate the number of atoms of each type in C12H22O11 and record in

Table 1. Show your work.

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Chemistry

Emilia Byrd

The 14 shown in fluorine-14 is called the

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Chemistry

Dixie Mccall

000333 g fluorescein (332.32 g/mol) is dissolved in 225 ml solution of ethanol. the density of ethanol is 0.785 g/ml. what is the concentration of the solution in molarity (m) ? how many ppm? i already

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Chemistry

Kayden Hale

What are 2ways to find volume

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Chemistry

Efrain Pineda

Calculate the hydrogen-ion concentration [H+] for the aqueous solution in which [OH-] is 1 x 10-6 mol/L. Is this solution acidic, basic, or neutral? Show your work to receive full credit.

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Chemistry

Jakobe Good

What is the mass of carbon in 500. g of octane?

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Chemistry

Yasmin Gross

What is the dose for 1 half of a pill

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Chemistry

Yamilet Holmes

Determine which type of property each statement describes by typing "physical" or "chemical" in the blank.

Hydrogen is a colorless, tasteless, and odorless gas.

Hydrogen is very combustible in the presence of oxygen.

Hydrogen is very reactive with most elements.

Hydrogen is the least dense of all elements.

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Chemistry

Yadiel Spencer

Is ice melting in a drink a chemical change?

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Chemistry

Brendon Soto

Calculate the pH of a solution of 0.25M H2SO4

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Chemistry

Walter Salazar

His transmitter is mostly located in diffuse neuronal systems in the CNS, with cell bodies particularly in the raphe nuclei. It appears to play a major role in the expression of mood states, and many antidepressant drugs are thought to increase its functional activity.

a) Acetylcholine

b) acctone

c) acid

d) base

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