SUU
What explains the key difference between a bomb calorimeter and a coffee cup calorimeter?
A bomb calorimeter is 10 times larger but works the same way
A bomb calorimeter measures heat for liquid products only
A bomb calorimeter has a separate chamber to hold substances and can even measure heat gain or loss for reactions that
do not occur in water.
A bomb calorimeter can measure heat gain or loss in gaseous reactions but is not useful for reactions that occur at high
pressures and temperatures.
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Describing connections in science texts enhances comprehension of complex concepts, demonstrating how individual ideas fit within larger scientific frameworks. Engaging with texts and visualization aids in understanding processes, while reflection and historical context further deepen one's grasp of the subject matter.

Understanding how ideas in science texts are connected is crucial for grasping complex scientific concepts and their applications. These connections form a network of knowledge that illustrates how individual ideas fit within the broader scientific context, aiding in comprehension of how things work and why they change. For example, a concept in biology might be related to certain chemical reactions, which are based on molecular behavior, and further down to atomic interactions.

It is essential for students to engage with science texts to become skilled at interpreting scientific information and to apply it in various settings, such as college and career environments. Visualizing the text content helps in understanding the processes described, thus establishing a clearer picture of the scientific phenomena. Utilizing strategies from other disciplines, like mathematics, assists with the interpretation of symbols, graphics, and charts which are prevalent in science texts.

Reflection on teaching others about scientific topics, understanding the historical development of scientific knowledge, and considering the nuances of the nature of science are beneficial practices mentioned in the texts. These practices reinforce understanding and articulate the connection between scientific ideas and their practical implications.

Answer:

It's not plugged in. A fuse is blown. Oxygen is no longer present because we killed all our trees. The pressure gauge is broken and all your Oxygen is gas because the gauge says you are at 30 atmospheres when you are actually at 1.5. The cooler is outdated and requires CFCs, which are now illegal. The cooler is too small to reduce the temperature of the quantity of oxygen you wish to liquefy. Your liquid oxygen machine is actually a liquid helium machine. The company that sold you your liquid oxygen machine was scamming you and now it looks really complex but in fact if you break it open with a sledgehammer, you will see that the inside is made completely of useless nonbouyant rubber duckies. Operator error.

Explanation:

All are entirely possible and would cause a liquid oxygen machine to be defected.

Possible reasons for the liquid oxygen machine not working include problems with pressure, the cooling system, and valves or pipes.

There could be several reasons why the liquid oxygen machine is not working. One possibility is that there is a problem with the pressure inside the machine. If the pressure is too low or too high, it can prevent the liquid oxygen from being produced.

Another reason could be a fault in the cooling system. Liquid oxygen needs to be kept at very low temperatures in order to remain in its liquid state. If the cooling system is not functioning properly, the liquid oxygen may not be able to be produced.

Lastly, there could be an issue with the valves or pipes that are used to transport the liquid oxygen. If these components are damaged or not properly connected, it can prevent the flow of the liquid oxygen.

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Answer:

B

Explanation:

Answer is B

You welcome

Answer: 2 4 5

Explanation:

Answer: D) The solubility would decrease and some of the lead (II) nitrate would precipitate out.

The identity of the resulting atom after a nuclear reaction, such as decay or fusion, is determined by the number of protons in the nucleus. The atomic number, which defines the element, is the total count of protons. Therefore, the resulting atom's identity is defined by its atomic number post-reaction.

Chemistry fundamentally revolves around the study of matter and the changes it undergoes. A critical component of understanding matter is knowing how to identify different elements. Elements are primarily defined by the number of protons in their atomic nuclei, a value known as the atomic number. When a nuclear reaction occurs, such as radioactive decay, one element can transform into another. To identify the resulting atom, one would determine the new atomic number - the count of protons in its nucleus after the reaction has occurred. This is crucial in nuclear chemistry and physics, as it allows scientists to predict the outcomes of such reactions and understand the changes in elemental identity.

Balancing means there are equal amount of molecules on each side, both reactant and products. This is a method I like to do.

Under, I count how many molecules are in each side.

              Cr2O3+Mg -->Cr + MgO

Cr:              2                    1

O:                     3                            1

Mg:                         1                 1

Let's guess and make the number of oxygens equal on both sides.

              Cr2O3+Mg -->Cr + 3MgO

Cr:             2                    1

O:                      3                           3       EQUAL

Mg:                          1                   3

See what we did there? We multiplied the MgO on the products side by 3 so we can have 3 oxygens. Now let's multiply the Mg on the reactants by three so Mg AND O can be equal.

                Cr2O3+3Mg -->Cr + 3 MgO

Cr:              2                      1

O:                      3                               3        EQUAL

Mg:                         3                        3          EQUAL

Finally, we just need to multiply the loner Cr in the products side by two to make it equal for all elements.

                 Cr2O3+3Mg -->2Cr + 3 MgO

Answer:

Ag = silver

Pb = lead

O = oxygen

Ar= argon

Zn = zinc

Cl = chlorine

N = nitrogen

C = carbon

Explanation:

The symbol with the element name is Ag silver, Pb lead, O oxygen, Ar argon, Zn zinc, Cl chlorine, N nitrogen and C carbon.

Elements are defined as a pure substance made up of only one sort of atom with the same number of protons in its nucleus.

It is also defined as a substance that cannot be broken down further by any chemical reaction.

There are basically three types of elements.

Thus, the symbol with the element name is Ag silver, Pb lead, O oxygen, Ar argon, Zn zinc, Cl chlorine, N nitrogen and C carbon.

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Answer:

Option (b) 0.67 M

Explanation:

The following Data were obtained from the question:

Mole of MgCl2 = 0.5 mole

Volume of solution = 750mL

Molarity of MgCl2 =?

Next, we shall convert the volume given from mL to L. This is illustrated below:

1000mL = 1L

Therefore 750mL = 750/1000 = 0.75L

Now we can obtain the molarity of MgCl2 as follow:

Molarity is defined as the mole of solute per unit litre of the solution i.e

Molarity = mole /Volume

Molarity = 0.5/0.75

Molarity of MgCl2 = 0.67 M

Answer: 8.2

Explanation:

pH of a solution is  - Log [ H+].

pH = - Log [ 6.2 x 10-9 M]

     = 9 - 0.7924

pH =  8.24 approx 8.2

To determine the molecular mass of the acid used in the esterification reaction, additional information about the alcohol involved or the identity of the acid is needed. Without these details, an accurate determination of the acid's molecular mass is impossible.

To find the molecular mass of the acid used in the esterification reaction to create a fat with the molecular mass of 386 g/mol, further information is needed. This would typically include the molecular mass of the alcohol also involved in the reaction, or the identity of the acid or alcohol. The molecular mass of the acid or the alcohol could be deduced from the formula of the reaction itself:

Fat = Acid + Alcohol - Water

However, without knowing the molecular mass of the alcohol or the identity of the acid or alcohol, we cannot accurately determine the molecular mass of the acid alone.

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Answer:

0.721 g/L

Explanation:

Ideal gas equation ->PV= nRT   ; n= mass (m)/ molar mass (M);

densitiy= mass (m)/ volume (V)

PV= (m/M)*RT  -> PVM= mRT   -> PM/RT= m/V   -> PM/RT=d

We need to put in SI units

105 Kpa= 1.04 atm

25°C= 298 K

d= (1.04 atm * 17 g/ mol)/(0.0821 * 298 K) = 0.721 g/L

Answer:

Linoleic acid

Explanation:

Carbonic acid, Sulfuric acid, and Nitric acid are the primary components of acid rain, all resulting from air pollution in the form of sulfur and nitrogen compounds respectively, reacting with water molecules in the atmosphere.

The primary components of acid rain are Carbonic acid, Sulfuric acid, Nitric acid. Acid rain is a result of air pollution, specifically sulfur and nitrogen compounds released from burning fossil fuels, which react with the water molecules in the atmosphere to form acids.

These acids then fall to the ground in the form of precipitation, giving us what we know as 'acid rain'. Sulfuric acid is formed from sulfur dioxide, while nitric acid forms from nitrogen oxides. Carbonic acid is formed by the reaction of carbon dioxide with water.

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Answer:

  58.443 g/mol

Explanation:

The molar mass of NaCl is the sum of the molar masses of the individual atoms:

  Na: 22.989770 g/mol

  Cl: 35.453 g/mol

The total molar mass is ...

  NaCl: 58.443 g/mol

__

The molar mass does not depend on whether the material is in solution or in any other form.

Answer:

Scientists believe that comets are the debris left from the solar nebula which condensed to form the Sun and planets in our solar system. Most comets are thought to originate in a huge cloud called the Oort Cloud. ... Comets follow a regular orbit around the Sun.

Hope this helps! :)

Explanation:

Answer:

In fact, if the estimated total mass of all asteroids was gathered into a single object, this object would be less than 1,500 kilometers across, less than half the diameter of our Moon. Kirkwood gaps: If you plot the radius of the orbits of the asteroids you do not get a smooth `bell-curve' shape.

Explanation:

Answer:

a, d, f

Explanation:

ΔHrxn = ΔH(CCl4) -ΔH(CH4) = - 106.7 -(-74.8) = - 31.9 kJ/mol

Answer:

The charge of an electron is negative.

The charge of a proton is positive.

A neutron does not have a charge.

Answer:

Negative

Explanation:

PROtons have POSITIVE charges, electrons have negative charges

Explanation:

A is a series circuit

B is parallel circuit

Answer:

A. series circuit

B. parallel circuit

Answer:

b,c,d

Explanation:

on edg

Answer:

B, C, and D

Explanation:

i just did it on edge

Answer:

1) total, 2) potential, 3) zero, 4) inversely.

Explanation:

1) The total energy in a mechanical system is determined by adding the potential and kinetic energy together.

2) The initial potential energy is equal to zero because the starting point is set at zero height to make things easier.

3) In the example, the final kinetic energy is determined to be zero because at the peak height, the ball instantaneously stops.

4) In this system, potential and kinetic energy are inversely proportional.

The system has an energy that can be conserved in the system, and when work is performed, the energy has been converted to working energy.

The following sentences can be completed as:

Total energy = Potential energy + Kinetic energy

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Answer:

CH4<HClO2<HClO<H2O<HCl

Explanation:

In ranking the compounds on the basis of increasing positive charge of hydrogen, we must consider the relative oxidation numbers of the various elements in the compounds.

Methane contains a nonpolar covalent bond, HClO2 contains a chlorine atom in +3 oxidation state, HClO contains a chlorine atom in +1 oxidation state. The more the positive charge on the halogen atom the lesser the magnitude of positive charge on the hydrogen atom. Between water and HCl, chlorine is more electro negative hence HCl will contain a more positively charged hydrogen atom than water.

The idea here is that a reaction's percent yield tells you how many moles of a product will actually be produced by a chemical reaction for every  

100

moles of this product that could theoretically be produced by the reaction.

In your case, the reaction is said to have a percent yield of  

30

%

. This means that for every  

100

moles of a product that the reaction could produce, you will only get  

30

moles.

The composition of a galaxy is typically observed through the distribution of stars, gas, and dark matter, with galaxies containing significant amounts of low-mass stars contributing to a high mass-to-light ratio. The universe, on the other hand, is largely composed of regular matter, dark matter, and dark energy, with dark components forming 95% of its makeup and influencing the large-scale structure. Cosmologically, the universe is homogeneous and isotropic, though galaxies group into complex structures like clusters and superclusters.

The composition of a galaxy compared to the composition of the universe is a fascinating aspect of cosmology, which is the study of the character and evolution of the universe. Within the universe, matter is distributed across approximately 10¹¹ galaxies, which form together in structures such as clusters and superclusters. The Milky Way Galaxy, as a part of the Local Group, is one of these galaxies, containing more stars and being slightly larger than the average galaxy.

While we see significant clouds of gas, stars, and a mysterious component known as dark matter in galaxies, the universe's largest composition includes regular matter, dark matter, and dark energy. Regular matter, which is familiar to us on Earth, only comprises around 5% of the universe, with most of it consisting of hydrogen and helium. Dark matter and dark energy make up the remaining 95%, and they have an immense impact on the universe's structure, but remain undetectable in Earth-bound laboratories.

Galaxies, as enormous collections of stars, gas, and other materials, have a mass-to-light ratio generally greater than 1, indicative of more mass being present than the light we can see. This is primarily due to the preponderance of low-mass stars in galaxies which contribute significantly to the overall mass without adding much light. In contrast, the Universe's composition is largely uniform and isotropic following the cosmological principle, differing primarily in its large-scale structure shaped by the distribution of dark matter and energy.

Answer:

The dissociation of copper sulfate into ions is an exothermic chemical reaction that releases heat into the surroundings.

Explanation:

Some of the potential energy stored in the solid sample of anhydrous copper sulfate is released as heat as the sample dissolves and dissociates into ions in the water. This is due to the large lattice energy of the crystalline copper sulfate.

hope this helps

Answer

C

Explanation:

If the athlete can run 9 kilometers in one hour, and thirty minutes is half an hour, then you divided the distance the athlete can run(9 kilometers) by 2, getting 4.5 kilometers in 30 minutes. Hope this helped.

Answer:

Water moving across the earth in streams and rivers pushes along soil and breaks down pieces of rock in a process called erosion. The moving water carries away rock and soil from some areas and deposits them in other areas, creating new landforms or changing the course of a stream or river.

Explanation:

Answer:

Water shapes Earth’s surface by wearing away soil and rock and through the movement of glaciers. Weathering through the action of water and frost or ice also changes the shape of Earth’s surface.

Explanation:

Answer:

Explanation:

1)This reaction is an acid base reaction. Baking soda is made up of sodium bicarbonate has it's PH above 7,while the Buttermilk contains some fatty acids with it's PH below 7, neutralization would occur when mixed together, and the pH of the mixture must be close to 7 which is neutral pH.

2) PH of 7(Neutral PH)

3)Self-raising flour has baking powder as one of its constituents. It also cotains cream of tartar, bicarbonate soda as well as calcium aluminium phosphate, the carbon dioxide from Bicarbonate of soda is released when reaction with acid takes place, then the Cream of tartar turns to tartaric acid when it is mosturized , then the reaction between them will produce bubbles of carbon dioxide in the cake, causing the cake to rise.

4)It makes a good household cleaner because it react with organic chemicals such as oil or grease then break them down like without attacking the metals that is attached to them.Bases contain particles called hydroxide ions. The higher the amount of hydroxide ions present in a base , the stronger it is.

5) The harsh acid or bike in the stomach creates a burning sensation in the back of your throat which irritate the food pipe line. Ifthe acid reflux is severe, it's reffered to as gastroesophageal reflux

Nina fell off her skateboard because the rough patch of pavement increased friction significantly, making the skateboard come to an abrupt halt. This principle is attributable to the physics of forces and friction.

What happened to Nina was due to the principle of physics, particularly in relation to forces and friction. When she encountered the rough patch of pavement, her skateboard wheel and the pavement started interacting. The irregularities on the rough pavement significantly increased friction, opposing the motion of the skateboard.

Normally, when Nina is skateboarding on smooth pavement, the wheel's contact with the ground is relatively small, thus minimizing friction. However, on rough terrain, the increased friction force can exceed the forward momentum and cause the skateboard to stop suddenly, resulting in Nina falling.

It is similar to how a ball rolling on a smooth surface will eventually stop due to frictional forces. In this case, the rough patch of pavement acted like a sudden increase in friction, arresting the skateboard's motion unexpectedly. It's also akin to a bullet being stopped by a board; the board exerts a force strong enough to overcome the bullet's kinetic energy.

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Answer: 7.41 L of O2

Explanation:

2H2O2(l) ----> 2H2O(l) + O2(g)

22.5 g H2O2  x __1 mol__ x __1 mol O2__ x __22.4 L__ = 7.41 L of O2

                            34.016 g       2 mol H2O2       1 mol O2