CHEMISTRY HIGH SCHOOL

What volume of carbon dioxide is produced when 0.489 mol of calcium carbonate reacts completely according to the following reaction at 0°C and 1 atm? calcium carbonate ( s ) calcium oxide ( s ) + carbon dioxide ( g )

Answers

Answer 1

Answer:

Answer:

11.0L of carbon dioxide is produced

Explanation:

Balanced equation: $CaCO_(3)(s)\rightarrow CaO(s)+CO_(2)(g)$

According to balanced equation, 1 mol of $CaCO_(3)$ produces 1 mol of $CO_(2)$

So, 0.489 mol of $CaCO_(3)$ produces 0.489 mol of $CO_(2)$

Let's assume $CO_(2)$ behaves ideally.

So, $P_{CO_(2)}V_{CO_(2)}=n_{CO_(2)}RT$

where P is pressure, V is volume , n is number of moles, R is gas constant and T is temperature in kelvin

Plug-in all the values in the above equation-

$(1atm)* V_{CO_(2)}=(0.489mol)* (0.0821L.atm.mol^(-1).K^(-1))* (273K)$

or, $V_{CO_(2)}=11.0L$

So, 11.0L of carbon dioxide is produced

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What is the volume, in milliliters, of 6.52 g of acetone?
Your sense of touch is based in your _____. bones muscles skin tissues
Which element, represented by X, reacts with fluorine to produce the compound XF2?
Uncontrolled hypertension can lead toA. heart attack. B. stroke. C. kidney damage. D. all of the above.
Which of the following could be a correct measurement using the full precision available for this balance?24.0 g 24.00 g 24 g 24.0000 g

Beth has a one-day-old baby daughter. When Beth puts her finger in the baby’s hand, the baby grasps her finger. Which statement best describes why the baby grasps Beth’s finger?A.) The baby’s reflex to grab is an innate behavior.
B.) The baby’s visual memory recognizes Beth’s finger.
C.) The baby is a day old and has learned to reach for Beth.
D.) The baby’s homeostatic response is to touch objects that are warm

Answers

The statement which statement best describes why the baby grasps Beth’s finger is that it is a reflex to grab is an innate behavior.

What is reflex?

In biology, a reflex, or reflex action, is an involuntary, unplanned sequence or action and nearly instantaneous response to a stimulus.

The simplest reflex is initiated by a stimulus, which activates an afferent nerve. The signal is then passed to a response neuron, which generates a response.

Reflexes are found with varying levels of complexity in organisms with a nervous system. A reflex occurs via neural pathways in the nervous system called reflex arcs. A stimulus initiates a neural signal, which is carried to a synapse. The signal is then transferred across the synapse to a motor neuron, which evokes a target response. These neural signals do not always travel to the brain,so many reflexes are an automatic response to a stimulus that does not receive or need conscious thought.

Learn more about reflex,here:

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Answer:

The baby`s reflex to grab is an innate behavior.

It`s not B because if the baby is 1 day old it`s not going to 'remember'.

It`s not C because it hasn`t really 'learned' anything.

It`s not D because babies can`t sense heat like a snake or something. -_-

Hope that helps

I also love the pfp

50 grams of acetic acid C2H4O2 are dissolved in 200 g of water. Calculate the weight % and mole fraction of the acetic acid in the solution

Answers

$50g$ $of$ $C_2H_4O_2$ $in$ $200g$ $H_2O$

so:

$(50)/(200+50)+100\%= (50*100)/(250)\%=20\%$

$MW of acid = 2*C+4*H+2*O = 2*12+4*1+2*16=$

$=24+4+32=60g/mol$

so:

$(50g)/(60g/mol)\approx0.83moles$

it means that

in $50g$ of acid there is $\approx0.83$ moles of acid

$MW of H_2O = 2*H+O=2*1+16=2+16=18g/mol$

so:

$(200g)/(18g/mol)\approx11.11moles$

it means that:

in $200g$ of water there is $\approx11.11$ moles of water

therefore:

$(0.83mol)/(11.11mol+0.83mol)= (0.83mol)/(11.94mol)=0.069$

So your answers are:

$20\%$

and the mole fraction is:

$0.069$

PLEASE FASTER THIS IS DUE DATE, create an hypothesis for the increase in CO2 levels and the affect on crop plants

Answers

Answer:

The increase in CO2 will affect crop plants by causing in increase in global warming and therefore, will stunt plant growth and cause excessive heat to kill the plants.

Explanation:

Hope this helps! xoxo

Match the landform to its description.caldera
made of pieces of lava
volcanic soil
material fills in valleys
cinder cone
bowl-shaped depression
shield volcano
wide summit, gentle slope
lava plateau
rich in nutrients

Answers

Answer:

cinder cone: made of pieces of lava

shield volcano: wide summit, gentle slope

volcanic soil: rich in nutrients

caldera: bowl shaped depression

lava plateau: material fills in valleys

Explanation:

it’s right

Answer:

Caldera, Bowl-Shaped depression

Shield volcano, Wide summit, Gentle slope

Lava plateau, Material fills in valleys

Volcanic soil, Rich nutrients

Cinder Cone, Made of pieces of lava

Explanation:

Got it right on edge

Write a balanced nuclear reaction for the following:234/91 Pa → 4/2 He+

When balancing the nuclear reaction, explain the following:
How does the Law of Conservation of Matter dictate what the daughter nuclide is?
How do we calculate the atomic mass and atomic number for the daughter nuclide?
Where do we look up what the new daughter nuclide element is?

Answers

Balanced nuclear reaction: 234/91 Pa → 4/2 He + 230/89 Ac.
1) number of protons and neutrons on both side of nuclear reaction must be the same. There are 91 protons (atomic number) and 143 neutrons (mass number - atomic number, 234 - 91 = 143 or (4-2) + (230 - 89) = 143)) on both side of reaction.
2) alphadecay is radioactive decay in whichan atomic nucleus emitsan alpha particle (heliumnucleus) and transforms into an atom with an atomicnumber that is reduced by two and mass number that is reduced by four, so atomic mass of new element is 89 (91 - 2) and mass number is 230 (234 - 4 = 230).
3) look at atomic number, element with atomic number 89 is actinium.

Final answer:

The balanced nuclear reaction is 234/91 Pa -> 4/2 He + 230/89 Ac. You calculate the atomic mass and atomic number of the daughter nuclide by subtracting the atomic mass and atomic number of the alpha particle from the parent nuclide. Then, refer to the periodic table to identify the element with the corresponding atomic number.

Explanation:

The process described in the question is a typical alpha decay nuclear process. In this reaction, a Protactinium-234 nuclide emits an alpha particle (which is a Helium nucleus) to produce a new nuclide, the daughter nuclide.

According to the Law of Conservation of Matter, the sum of the mass and atomic numbers (protons + neutrons) of the reactants must equal the sum of the mass and atomic numbers of the products. This means we can calculate the atomic number and atomic mass of the daughter nuclide. The atomic mass would be the difference: 234 - 4 = 230. The atomic number would be the difference: 91 - 2 = 89.

After that, you can identify the new element by its atomic number, 89, from a periodic table, which shows it to be Actinium (89/230 Ac).

So, the balanced nuclear reaction is: 234/91 Pa -> 4/2 He + 230/89 Ac

Learn more about Balancing Nuclear Reactions here:

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If an atom has an electron configuration of 2.8.2, what will it be most likely to bond with? A. One fluorine atom B. Two chlorine atoms C. None of these D. One arsenic atom

Answers

Answer:

B. Two chlorine atoms

Explanation:

This electronic configuration shows that the given atom is magnesium.

Electronic configuration of magnesium:

Mg¹² = 1s² 2s² 2p⁶ 3s²

There are two valance electrons of magnesium that's why it would react with two atoms of chlorine. Chlorine is present in seventeen group. It has seven valance electrons. It required just one electron to get complete octet. While magnesium needed to lose two electrons to get complete octet. That's why two chlorine atoms bonded with one magnesium atom. Thus both would get complete octet.

Mg + Cl₂ → MgCl₂

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When a chemical reaction is in equilibrium, a. the reaction is proceeding at its maximum rate. b. there is no net change in the amount of substrates or products. c. the reaction has stopped. d. there are equivalent amounts of substrates and products.