bread, rice, pasta, potatoes, vegetables, fruit, sugar, yogurt, milk, fish, meat, cheese, peanut butter, butter, salad dressing, avocado, and olive oil.
Answer:
Protein, fat, vitamins and oil.
Explanation:
Hope this helps :)
The Hall-He'oult process is expensive and consumes large amounts of
energy to produce __
O
Aluminum
Iron ore
O Gold
Silver
What is the answer
How many valence electrons does bromine have
7 valence electrons
Explanation:
Answer:
7
Explanation:
because it is in group 17 so you would use the 2nd digit and that would be 7!
Approximately how many mineral species have scientists identified?
250
5000
1500
60
A 250g sample of water with an initial temperature of 98.8oC loses 1794 cal of heat. What is the final temperature of the water?
Answer:
91.62 C
Explanation:
Q = ( m ) ( Csh ) ( T2 - T1 )
T2 = T1 + ( Q ) / ( m ) ( Csh )
T2 = 98.8 C + ( - 7500 J ) / ( 250 g ) ( 4.186 J/g - C )
T2 = 91.6 C
The final temperature of the water is approximately [tex]\(91.624 \, ^\circ \text{C}\).[/tex]
To calculate the final temperature of the water, we'll use the heat transfer equation:
Q = [tex]mc\Delta T[/tex]
Given values:
m = 250g (mass of water)
c = [tex]1 \, \text{cal/g}^\circ \text{C}\)[/tex] specific heat capacity of water)
Q = -1794 cal (negative because heat is lost)
Now, we'll rearrange the formula to solve for [tex]\(\Delta T\)[/tex] :
[tex]\[\Delta T = \frac{Q}{mc}\][/tex]
Substitute the values:
[tex]\[\Delta T = \frac{-1794 \, \text{cal}}{(250 \, \text{g})(1 \, \text{cal/g}^\circ \text{C})}\][/tex]
Now, calculate [tex]\(\Delta T\)[/tex]:
[tex]\[\Delta T \approx -7.176 \, ^\circ \text{C}\][/tex]
The negative sign indicates a decrease in temperature, which makes sense since heat was lost.
Now, find the final temperature [tex](\(T_{\text{final}}\))[/tex] :
[tex]\[T_{\text{final}} = T_{\text{initial}} + \Delta T\][/tex]
[tex]\[T_{\text{final}} = 98.8 \, ^\circ \text{C} - 7.176 \, ^\circ \text{C}\][/tex]
[tex]\[T_{\text{final}} \approx 91.624 \, ^\circ \text{C}\][/tex]
So, the final temperature of the water is approximately [tex]\(91.624 \, ^\circ \text{C}\)[/tex].
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If you visited a virtual Newton’s Cradle website or played with the real device, you might have noticed that after a few swings, the balls slow down. The height they reach gets shorter and shorter until they finally stop moving. If energy is transformed from one type to the other and transferred between the different balls in the device, why does the motion in Newton’s Cradle finally stop? (Hint: Think about something you decided to ignore earlier in the reading.)
Final answer:
The motion in Newton's Cradle stops due to friction and air resistance, which convert the system's kinetic and potential energy into thermal energy, eventually causing the balls to stop swinging.
Explanation:
The motion of Newton's Cradle ultimately stops because of the effects of friction and air resistance, which are forms of dissipative forces. These forces act to gradually convert the kinetic energy and potential energy of the swinging balls into thermal energy, which is dissipated into the environment. While kinetic energy is transferred from one ball to the next in the cradle, a small amount of energy is lost with each collision and swing due to these forces, ultimately causing the balls to come to a rest.
In the idealized physics examples, such as a perfectly elastic collision where no kinetic energy is lost, the motion would continue indefinitely. However, in the real world, due to non-conservative forces like friction and air resistance, kinetic energy is not perfectly conserved in collisions and is instead transformed into other forms of energy, such as heat. This gradual loss of energy to the surroundings is why the height the balls reach in Newton's Cradle decreases over time, and they eventually stop moving.
If a student needs to make exactly 2.5 liters of
a 1.25 M solution of acetic acid from the 12.0
M stock solution in the chemistry closet, what
must the student do?
How many grams of CaBr2 would be needed to create 450. mL of a 2.00 M
solution? Round off your answer to the nearest gram. Record your answer in the
grid below.
Answer:
Mass of CaBr₂ = 179.9 g
Explanation:
Given data:
Volume of CaBr₂ solution = 450.0 mL (450/1000 = 0.45 L)
Molarity of solution = 2.00 M
Mass of CaBr₂ = ?
Solution:
Formula:
Molarity = number of moles / volume of solution in L
Now we will put the values.
2.00 M = number of moles / 0.45 L
Number of moles = 2 M × 0.45 L
Number of moles = 0.9 mol ( M = mol/L)
Mass of CaBr₂:
Mass of CaBr₂ = number of moles × molar mass
Mass of CaBr₂ = 0.9 mol × 199.89 g/mol
Mass of CaBr₂ = 179.9 g
To prepare 450 mL of a 2.00 M CaBr2 solution, one would need 180 grams of CaBr2, calculated using the molarity formula and the molar mass of CaBr2.
Explanation:To calculate the amount of CaBr2 needed to make a 2.00 M solution, we can use the formula: mass = molarity × volume × molar mass. The student wants a volume of 450 mL (0.450 L) of a 2.00 M CaBr2 solution. First, we need to find the molar mass of CaBr2 by adding the atomic masses of one calcium (Ca) atom and two bromine (Br) atoms. The atomic mass of Ca is approximately 40.08 g/mol, and the atomic mass of Br is approximately 79.90 g/mol. So, the molar mass of CaBr2 is 40.08 g/mol + (2 × 79.90 g/mol) = 199.88 g/mol.
Using the formula we have: mass = 2.00 M × 0.450 L × 199.88 g/mol = 179.892 g. Rounding off, we need 180 grams of CaBr2 to create 450 mL of a 2.00 M solution.
Every summer, Mary spent sunny days out in the sun. She never wore a hat or sunscreen. When she became a teenager, Mary started lying in a tanning bed before summer arrived. By the time Mary was 25 years old, she had begun to get small sores on her arms and shoulders.
It is very likely that Mary will end up with some form of
A)
HIV/AIDS.
B)
skin cancer.
C)
bacterial infection.
D)
Parkinson's disease.
Final answer:
Given her prolonged and unprotected exposure to UV light from the sun and tanning beds, it is very likely that Mary will develop some form of skin cancer. Sunburns and the use of tanning beds significantly increase the risk of skin cancer by damaging the DNA in skin cells and causing abnormal cell growth.
Explanation:
The story of Mary's repeated and unprotected exposure to the sun and her use of tanning beds highlights a significant health concern. Given the information, it is very likely that Mary will end up with some form of skin cancer. Ultraviolet (UV) light from the sun and tanning beds can damage the DNA in skin cells, leading to abnormal cell growth and potentially cancerous tumors. Skin cancer is classified into various types, including melanoma, basal cell carcinoma, and squamous cell carcinoma, with varying degrees of severity and treatment modalities. Mary's small sores on her arms and shoulders could be early signs of skin cancer, emphasizing the importance of protective measures against UV radiation, such as wearing sunscreen with a high SPF, wearing protective clothing, and avoiding excessive sun exposure and the use of tanning beds.
Options like HIV/AIDS, bacterial infection, and Parkinson's disease are unrelated to the described behavior and symptoms. Skin cancer is directly linked to the conditions described in Mary's case, making it the most likely outcome of her prolonged and unprotected exposure to UV radiation.
This chart shows the experimental design of four students who are all observing what kind of bird seed birds tend to eat
more often
Student 1 Student 2 Student 3 Student 4
- Performed the - Repeated the - Repeated the - Repeated the
experiment experiment 5 experiment 2 experiment 5
once
times
times
mes
- Used the same - Used the same - Used the same - Used the same
area. same time area, different area, different area. same time
of day, and time of day, and time of day, and of day, and
same amount of different amount different amount same amount of
seeds
of seeds of seeds
seeds
Which student is the most likely to have reproducible results?
Student 1
Student 2
Student 3
Student 4
Answer:
student 2 i took the quiz
Explanation:
Which particle is a neutron most equal to in mass? A. a molecule B. an atom C. a proton D. an electron
The neutron is most equal to a proton in mass.
The mass of a neutron is 1.67492749804 × 10−27 kg, while the mass of a proton is 1.67262189832 × 10−27 kg. This means that the neutron is only about 0.1% heavier than the proton.
Electrons are much lighter than neutrons and protons, with a mass of 9.1093837015 × 10−31 kg. This means that the neutron is about 1,836 times heavier than the electron.
Atoms and molecules vary widely in mass, so it is impossible to say definitively which one is most equal to a neutron in mass. However, a typical atom, such as carbon, is about 12 times heavier than a neutron, while a typical molecule, such as water, is about 18 times heavier than a neutron.
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Identifying Processes of the Carbon Cycle
Quick
Check
How do consumers obtain the carbon that they need for their life processes?
They breathe it in from the surrounding air.
They break down the plants and animals they eat.
They absorb it from the surrounding soil.
They absorb it from water through their pores.
Answer:
They break down the plants and animals they eat.
Explanation:
Consumers are the organisms which feed on plants and animals for obtaining energy. The carbon which is present in plant body in the form of glucose which is made in the process of photosynthesis. When these plants are eaten by consumers, the carbon which present in plants are transferred into the animal's body. This carbon is removed from the body of consumer in the process of cellular respiration and again goes to the atmosphere.
The reaction 2NO (g) → N2 (g) + O2 (g) has a ΔH =−180.5 kJ .
How much heat will be required to produce 44.8 L of NO by the reverse reaction?
180.5 kJ
301 kJ
322.3 kJ
644 kJ
Answer: the answer is 180.5 i am 100% i just did the test
The heat that should be required to produce 44.8 L of NO by the reverse reaction is 180.5 J.
What is heat?The heat energy should be converted from one body to the another due to which there should be the difference in the temperature. In the case when two bodies should be at the different temperature so here the energy should be transferred i.e. the heat should be flows i.e from the hotter body to the colder.
hence, The heat that should be required to produce 44.8 L of NO by the reverse reaction is 180.5 J.
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what is the chemical formula for glucose
Answer:
C6H12O6
Explanation:
This means that there are 6 carbon atoms, 12 hydrogen atoms and 6 oxygen atoms
Answer:
C6H12O6
Explanation:
Glucose is a aldohexose. It is a simple sugar with six carbon atoms. It is a monosaccharide. Molecular formula of glucose is C6 H12 O6.
When an acid solution exactly neutralizes a base
solution, which acid-base combination always
produces a mixture with a pH less than 7?
Select one
-a weak acid and a weak base
- a strong acid and a strong base
-a weak acid and a strong base
-a strong acid and a veak base
Answer:a weak acid and a weak base
Explanation:
PLEASE HELP ASAP!!!!!
What do the periods (horizontal rows) and groups (vertical columns) of the periodic table indicate to us about the elements that are categorized within them?
Answer:
Periods indicate that a new period at a new principal energy level which is filled with electrons. Groups indicate that the elements share similar properties because their shells are filled with the same number of valence electons.
Explanation:
We see that starting at period 2 Li has a +1 charge , He has +2 charge, B has +3 charge, C has the potential to have a +4 charge or -4 charge (because it can gain or loose electrons) and N has a -3 charge, etc. Groups however, have similar properties and every element in a 1A - 8A has the same number of valence electrons. All except the noble gases in which He only needs 2 electrons to be in a perfect state. This is its octet as it would be a completely different element if it had more than 2 electrons in its shell. An example of the groups sharing similar properties is if we were to look at group 1A. In group 1A we find H, Na, K, etc. These are all highly unstable elements when alone (not in a compound) and they are very reactive. If you were to put Na for instance in water, it would light up and you'd see a flame sitting on top of the water. A scientist could do that with the rest of the elements in the group and they would see this increasing in reactivity as you go down the periods. Francium isn't visible long enough to be able to see this happen though. It's more of that kind of element that scientists prove that it exists, but not a very common element to get to learn much about.
Final answer:
Periods indicate electron shells, while groups represent elements with similar chemical properties.
Explanation:
The periods in the periodic table, which are the horizontal rows, indicate the energy levels or electron shells of the elements within them. As you move across a period from left to right, the number of protons and electrons in the elements increases by one, leading to periodic changes in properties.
The groups in the periodic table, which are the vertical columns, represent elements with similar chemical properties. Elements within the same group have the same number of electrons in their outermost shell, leading to similar reactivity and chemical behavior.
Even though the neighborhood shown by the green star was not next to any of these fires, how was the neighborhood affected by them?
A)
The heat generated by these fires made the temperatures in the surrounding areas increase.
B)
The smoke produced by these fires were carried by strong winds and made the air hard to breathe.
C)
The chemicals that were released by these fires cleared out the air and improved overall visibility.
D)
The air around the neighborhood was cooled due to the fire sucking the heat out of the surrounding air.
Answer:
B
Explanation:
B is the only possible answer that makes much sence, smoke is very toxic and it makes it hard to breath and is bad for your lungs
Which sweet tea would you expect to taste the sweetest? *
Answer:
8M IM NOT SURE SO. IF YOU CAN GET A CLEARED PICTURE OF IT WOULD REALLY HELP
The sweetest tea would be the one that contains the highest amount of sugar. The sweetness of a drink is determined by sugar content. Hence, a sweet tea with larger sugar amount will taste sweeter.
Explanation:The sweetness of tea is determined by the amount of sugar that it contains. So among different sweet teas, the one with the highest amount of sugar will taste the sweetest. For instance, if Tea A contains 20grams of sugar per serving and Tea B contains 30grams of sugar per serving, then Tea B would taste sweeter than Tea A, because it contains more sugar.
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The pressure of a sample of helium in a 1.00-L container is 0.988 atm. What is the new pressure if the sample is placed in a 2.00-L container?
Answer : The new pressure if the sample placed in a 2.00-L container is, 0.494 atm.
Explanation :
Boyle's Law : It is defined as the pressure of the gas is inversely proportional to the volume of the gas at constant temperature and number of moles.
[tex]P\propto \frac{1}{V}[/tex]
or,
[tex]P_1V_1=P_2V_2[/tex]
where,
[tex]P_1[/tex] = initial pressure = 0.988 atm
[tex]P_2[/tex] = final pressure = ?
[tex]V_1[/tex] = initial volume = 1.00 L
[tex]V_2[/tex] = final volume = 2.00 L
Now put all the given values in the above equation, we get:
[tex]0.988atm\times 1.00L=P_2\times 2.00L[/tex]
[tex]P_2=0.494atm[/tex]
Thus, the new pressure if the sample placed in a 2.00-L container is, 0.494 atm.
The new pressure if the sample is placed in a 2.00-L container is 0.494 atm.
Boyle's Law:It means the pressure of the gas should be inversely proportional with respect to the volume of the gas at the same temperature also the no of moles.
P1V1 = P2V2
Here
P1 = initial pressure = 0.988 atm
P2 = final pressure = ?
V1 = initial volume = 1.00 L
V2 = final volume = 2.00 L
So,
the new pressure should be
0.988 * 1.00L = P2 * 2.00l
So, P2 is 0.494 atm
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How many milliliters of a 0.205 M solution of glucose, C6H12O6, are required to obtain 150.1 g of glucose?
Answer:
4050 mL
Explanation:
Given data:
Mass of glucose = 150.1 g
Molarity of solution = 0.205 M
Volume of solution = ?
Solution:
Molarity = number of moles of solute / L of solution.
Now we will calculate the moles of sugar first.
Number of moles = mass/ molar mass
Number of moles = 150.1 g/ 180.156 g/mol
Number of moles = 0.83 mol
Now we will determine the volume:
Molarity = number of moles of solute / L of solution.
0.205 M = 0.83 mol / L of solution.
L of solution = 0.83 mol / 0.205 M
L of solution = 4.05 L
L to mL conversion:
4.05 L × 1000 mL / 1 L = 4050 mL
how many moles of water as a gas can be formed 2.45 L
Answer:
0.11mole
Explanation:
Let us assume that the condition is at standard temperature and pressure(STP);
Given parameters:
Volume of water = 2.45L
Unknown:
Number of moles found in this volume of water = ?
Solution;
At STP;
Number of moles = [tex]\frac{volume of gas}{22.4}[/tex]
Input the parameters and solve;
Number of moles of water = [tex]\frac{2.45}{22.4}[/tex] = 0.11mole
The number of moles of water found is 0.11mole
QUESTION 25
How many H20 molecules are in 24 g H20?
Answer:
8.03x10^23 molecules.
Explanation:
A background knowledge of Avogadro's hypothesis shows that 1 mole of any substance contains 6.02x10^23 molecules
From the above hypothesis which is know today as Avogadro's law, 1 mole of H2O also contains 6.02x10^23 molecules.
1 mole of H2O = (2x1) + 16 = 2 + 16 = 18g.
Now, we can find the number of molecules contained in 24g of H2O as follow:
18g of H2O contains 6.02x10^23 molecules.
Therefore, 24g of H2O will contain = (24x6.02x10^23)/18 = 8.03x10^23 molecules.
From the calculations made above,
24g of H2O contains 8.03x10^23 molecules.
Important: How much energy would be required to vaporize 45.0 grams of water?
Explanation:
The answer is 116 kJ . c - water's specific heat - 4.184 J/g⋅∘C . Then, you must provide enough heat to get all the water from liquid to steam.
calculate the amount of miles of HCI is needed to make 500.0 mL of a 0.200M solution
Answer: 0.4 moles
Explanation:
Given that:
Amount of moles of HCI = Z (let unknown value be Z)
Volume of HCl = 500.0 mL
Convert 500.0 mL to liters
If 1000ml = 1L
500.0 mL = (500.0 mL/1000mL) = 0.5L
Molarity of HCl solution = 0.200M
Recall that molarity of a solution is obtained by dividing the amount of moles by volume in liters
i.e Molarity = Amount in moles/volume
0.200M = Z x 0.5L
Z = 0.200M / 0.5L
Z = 0.4 moles
Thus, 0.4 moles of HCl is needed to make the solution
One major problem with wind and solar energy is that they are conditional. Explain how hydroelectric pumped storage could be used to eliminate this obstacle?
please help me!
Answer:
The wind energy and solar energy have their own benefits when producing electricity but one of their major drawbacks is that both these energy form depends on the environmental conditions and cannot be stored.
On the other hand, in hydroelectric pumped storage, water is stored in the form of gravitational potential energy. If not enough water is there to produce electricity, then this stored water can be run over turbines to produce electricity. Hence, this is one benefit of hydroelectric pumped storage over wind and solar energy.
Answer:
These pumps allow the energy to be saved for future use, whenever the load increases.
Explanation:
Pumped-storage hydropower (PSH) is a type of hydroelectric energy storage. It is a configuration of two water reservoirs at different elevations that can generate power (discharge) as water moves down through a turbine; this draws power as it pumps water (recharge) to the upper reservoir.
PSH capabilities can be characterized as open-loop—where there is an ongoing hydrologic connection to a natural body of water—or closed-loop, where the reservoirs are not connected to an outside body of water.
Compounds are _____substances.
neutral
charged
ionized
non-neutral
Answer:
Neutral
Explanation:
Ionic compounds are electrically neutral because they form ionic bonds between positively and negatively charged atoms.
Answer:
neutral
Explanation:
just built different
PLEASE HELP!CHEMISTRY QUESTION
On Venus the atmospheric pressure is 2700 mmHg and nitrogen gas makes up 3.0 % of the atmosphere. What is the partial pressure of nitrogen on Venus? mmHG
Answer: The partial pressure of nitrogen on Venus is 81 mmHg
Explanation:
To calculate the partial pressure of the gas, we use the equation given by Raoult's law, which is:
[tex]p_{A}=p_T\times \chi_{A}[/tex]
where,
[tex]p_A[/tex] = partial pressure of nitrogen gas = ?
[tex]p_T[/tex] = total pressure = 2700 mmHg
[tex]\chi_A[/tex] = mole fraction of nitrogen gas = 3.0 % = 0.03
Putting values in above equation, we get:
[tex]p_{N_2}=2700mmHg\times 0.03\\\\p_{N_2}=81mmHg[/tex]
Hence, the partial pressure of nitrogen on Venus is 81 mmHg
Thermal conductors____.
A. have high conductivity
B. have low conductivity
C. are often metals
D. have low latent heat
E. have lgh of air pocket
c) are often metals
liquids are fairly good thermal conductors while gases and things like wood and plastic foam are poor conductors of heat.
Thermal conductors have high thermal conductivity and are usually metals because they have free electrons that are efficient at transferring heat. Latent heat is not a direct measure of thermal conductivity. Thus, it can be stated that thermal conductors have high conductivity (option A).
Thermal conductors are materials that have a high ability to transfer heat through them. Among the multiple-choice options provided, the correct answers that accurately define thermal conductors are:
A. have high conductivity - Thermal conductors have high thermal conductivity, meaning they can efficiently transfer heat.
C. are often metals - Most metals, such as copper and aluminum, are good examples of thermal conductors due to the presence of free electrons which facilitate the transfer of heat.
In the context of the options provided related to latent heat, the most appropriate option is A (have high conductivity) which is a characteristic of a thermal conductor. Latent heat primarily concerns the heat absorbed or released during phase changes, not thermal conductivity.
When we speak about materials' thermal properties, we often refer to conductors and insulators. Good electrical conductors, which are typically metals, are also known to be good heat conductors due to the free movement of electrons that transport thermal energy.
What do lightning and stars have in common?
1 Both contain all three states of matter
2 Both have a fixed volume and shape
3 Both have no electrical charge
4 Both are made of plasma
Answer:
stars and lightning are both made of plasma.
Lightning and stars both consist of plasma, the 'fourth state of matter' that includes a significant number of electrically charged particles. Stars are essentially balls of glowing plasma, while lightning is a rapid discharge of energy that forms plasma.
Explanation:Lightning and stars both have something important in common - they are made of plasma. Plasma is often referred to as the 'fourth state of matter,' distinct from solid, liquid, or gas. It is an ionized gas, which means it contains a significant number of electrically charged particles—positive ions and negative electrons.
Stars, including our sun, are essentially massive balls of glowing plasma. On the other hand, lightning is a dramatic natural phenomenon generated when electrical charges separate within a cloud and cause a rapid discharge of energy, also forming plasma. This results in a bright flash of light and an accompanying shock wave that we hear as thunder. Thus, the primary similarity between lightning and stars is their plasma composition.
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Which best describes nuclear fusion?
A. It produces heavier elements.
B. It creates abundant radioactive material.
C. It causes the collision of alpha particles.
D. It transforms energy into mass.
Answer:
The answer is C. It causes the collision of alpha particles.
Explanation:
Nuclear fusion is a process that produces heavier elements by combining lighter elements.
Explanation:Nuclear fusion is a process in which two or more atomic nuclei come together to form a single, more massive nucleus, releasing a large amount of energy in the process. The answer to the question is It produces heavier elements. During nuclear fusion, lighter elements combine to form heavier elements. This process is responsible for the energy emitted by the sun and other stars. It does not create abundant radioactive material as nuclear fusion reactions do not produce long-lived radioactive waste like nuclear fission reactions. It does not cause the collision of alpha particles, as alpha particles are involved in nuclear decay processes. It also does not transform energy into mass, as mass is directly involved in nuclear reactions.
Hence the answer is Option A.
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If a substance has a half life of 45 days, how much of the original substance would be left after 90 days?
After 90 days, two half-lives of a substance with a 45-day half-life will have passed, resulting in one-fourth or 25% of the original amount remaining.
If a substance has a half-life of 45 days, after 90 days, there would have been two half-lives that passed. During each half-life, half of the remaining substance decays. So after the first 45 days, you would be left with one-half of the initial amount, and after another 45 days (which totals 90 days), you would be left with half of that amount. This means after 90 days, one-fourth of the original substance would be left.
To calculate this, you can use the equation for exponential decay:
Final amount = Initial amount × [tex]1/2^{number of half lives}[/tex]
In this case, the number of half-lives is 90 days divided by the half-life of the substance, which is 45 days:
Number of half-lives = 90 days / 45 days per half-life = 2 half-lives
Therefore, the remaining amount of the substance would be:
Final amount = Initial amount ×(1/2)² = Initial amount ×1/4
This results in the correct answer that after 90 days, you'd have 25% or one-fourth of the original amount of the substance remaining.