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Obama's Last Name is Care!
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How does the addition and subtraction of subatomic particles affect the atom?
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Answer:
Adding or removing neutrons from the nucleus are how isotopes are created. Protons carry a positive electrical charge and they alone determine the charge of the nucleus. Adding or removing protons from the nucleus changes the charge of the nucleus and changes that atom's atomic number.
Explanation:
Answer:
if you add or subtract a proton from the nucleus, you create a new element. If you add or subtract a neutron from the nucleus, you create a new isotope of the same element you started with. In a neutral atom, the number of positively charged protons in the nucleus is equal to the number of orbiting electrons
The water in a garden hose flows at a rate of 10.0 liters per minute. What is the flow rate in gallons per hour? (1gal=3.79L)
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The water in a garden hose flows at a rate of 10.0 liters per minute. Therefore, 158 gal/hr is the flow rate in gallons per hour.
What is flow rate?Flow rate is the amount of liquid that travels in a given length of time. Furthermore, the flow rate is affected by the channel through which the liquid is travelling, the area of the pipe, as well as the velocity of something like the liquid. Furthermore, the formula is. Fluid dynamic rate = pipe or channel area x liquid velocity.
The volume flow value is the rate of liquid (water flow rate formula) passing through every place in an area over time.
1 gal = 3.79 L
60 min = 1 hr
10.0 L/min x 60 min/hr x 1 gal/3.79 L = 158 gal/hr
Therefore, 158 gal/hr is the flow rate in gallons per hour.
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Here is a second order reaction A→ P. If the initial concentration of A 0.0818 M goes down 30.0% in 3.15 minutes, what is the rate constant for the reaction?
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The rate constant of the second-order reaction is 0.111 M^-1 min^-1.
The given data represents a second-order reaction where the rate of the reaction is proportional to the square of the concentration of A.
The integrated form of the second-order reaction is:
1/[A]t = kt + 1/[A]0
where [A]t and [A]0 are the concentrations of reactant A at time t and time zero, respectively, k is the rate constant.
We can use the given information to calculate the rate constant (k) of the reaction for the given half-life (t1/2) of 3.15 minutes:
t1/2 = (1 / k[A]0)
Using the percentage decrease in concentration and the given initial concentration, we can calculate the concentration of A at time t:
[A]t = [A]0 - 0.30[A]0 = 0.57126 M
Substituting the given values, we get:
3.15 min = (1 / k)(0.0818 M) / (0.0818 M - 0.57126 M)
Simplifying the equation above, we can solve for k:
k = 0.111 M^-1 min^-1
Therefore, the rate constant of the second-order reaction is 0.111 M^-1 min^-1.
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Select which three statements best match the key messages in the Nevada State Climate Summary article form NOAA.
Question 1 options:
Temperatures in Nevada have increased about 2°F since the beginning of the 20th century.
Models predict if current consumption rates continue, emission rates will decrease over the next century.
Nevada is one of the driest states in the Unites States and future average annual precipitation rates are uncertain.
Predicted higher temperatures will increase drought intensity and the frequency of wildfires.
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According to the NOAA, the key messages in the Nevada State Climate Summary article form are:
Temperatures in Nevada have increased about 2°F since the beginning of the 20th century.Nevada is one of the driest states in the Unites States and future average annual precipitation rates are uncertain. Predicted higher temperatures will increase drought intensity and the frequency of wildfiresWhat is the NOAA?The National Oceanic and Atmospheric Administration (NOAA) is a federal agency tasked with understandind and predicting changes in climate, weather, ocean, and coasts, as well as disseminating this information to the necessary bodies for action.
According to the NOAA, the key messages in the Nevada State Climate Summary article form are:
Temperatures in Nevada have increased about 2°F since the beginning of the 20th century.Nevada is one of the driest states in the Unites States and future average annual precipitation rates are uncertain. Predicted higher temperatures will increase drought intensity and the frequency of wildfires.Learn more about the NOAA at: https://brainly.com/question/25987206
which is the graph of the function g(x) = f(-x)
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To graph the function g(x) = f(-x), you can start with the graph of f(x) and then reflect it about the y-axis.
What is a graph of the function g(x) = f(-x)?To find the graph of the function g(x) = f(-x), we can start with the graph of the function f(x) and then reflect it about the y-axis.
If the graph of f(x) is symmetric with respect to the y-axis, meaning it is unchanged when reflected, then g(x) = f(-x) will have the same graph as f(x).
However, if the graph of f(x) is not symmetric with respect to the y-axis, then g(x) = f(-x) will be a reflection of f(x) about the y-axis.
In either case, the resulting graph of g(x) = f(-x) will be symmetric with respect to the y-axis.
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For the following reaction at equilibrium (400 °C), describe the effect on the equilibrium amount of Cl2(g) if additional O2(g) is added to the mixture at constant volume?
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The addition of \(O_2(g)\) will shift the equilibrium towards the right side of the reaction and will consume \(Cl_2(g)\).
For the given reaction at equilibrium (400 °C), the effect on the equilibrium amount of \(Cl_2(g)\) if additional \(O_2(g)\)) is added to the mixture at constant volume can be determined by the Le Chatelier's principle.Le Chatelier's principle states that if a system in equilibrium is subjected to a stress, the system adjusts itself in such a way that it counteracts the stress and a new equilibrium is established.The given reaction is:\(Cl_2(g)\) + \(O_2(g)\) ⇌ 2ClO(g)When additional \(O_2\) is added to the mixture at constant volume, the concentration of O2(g) increases. According to Le Chatelier's principle, the system will adjust itself to counteract this increase in concentration by decreasing the concentration of \(O_2(g)\). This can be achieved by consuming \(O_2(g)\) to produce more ClO(g).The reaction shifts to the right to counteract the increase in concentration of \(O_2(g)\). As a result, the equilibrium amount of \(Cl_2(g)\) decreases, and the equilibrium amount of ClO(g) increases. Therefore, the addition of \(O_2(g)\) will shift the equilibrium towards the right side of the reaction and will consume \(Cl_2(g)\).Hence, the effect of adding \(O_2\) to the mixture will decrease the amount of \(Cl_2(g)\) at equilibrium while increasing the amount of ClO(g).Summary: If additional \(O_2\) is added to the mixture at constant volume, the concentration of \(O_2(g)\) increases. According to Le Chatelier's principle, the system will adjust itself to counteract this increase in concentration by consuming \(O_2(g)\) to produce more ClO(g). As a result, the equilibrium amount of \(Cl_2(g)\) decreases, and the equilibrium amount of ClO(g) increases. Therefore, the addition of \(O_2(g)\) will shift the equilibrium towards the right side of the reaction and will consume \(Cl_2(g)\).For more questions on equilibrium
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how to find moles, when given molar mass
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To find moles when given the molar mass, you can use the concept of molar mass as a conversion factor.Molar mass represents the mass of one mole of a substance, expressed in grams per mole (g/mol).
To calculate moles, divide the given mass of the substance by its molar mass. The equation is:
moles = mass / molar mass
For example, if you have 56 grams of carbon dioxide (CO2) and want to find the number of moles, you need to know the molar mass of CO2, which is approximately 44 g/mol. Using the equation above:
moles = 56 g / 44 g/mol
moles ≈ 1.27 mol
Therefore, there are approximately 1.27 moles of carbon dioxide in 56 grams.
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A reaction between liquid reactants takes place at 28.0 degree celcuis in a sealed, evacuated vessel with a measured volume of 15.0L. Measurements show that the reaction produced 10.0g of dinitrogen difluoride gas.
Calculate the pressure of dinitrogen difluoride gas in the reaction vessel after the reaction. You may ignore the volume of the liquid reactants. Round your answer to 2 significant digits.
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The pressure of N2F2 will be 1.64 atm.
Given data:
Mass of N2F2 = 66 grams
Molar mass of N2F2 = 66 g/mol
Temperature = 28°C = 273 +28 = 301 Kelvin
volume = 15 L.
Gas constant = 0.08206 L*atm/K* mol
Number of moles can be determined by using the formula:
Number of moles = mass of N2F2 / Molar mass of N2F2
Number of moles = 66 g/ 66 g/mol = 1 moles.
Volume can be determined by using the formula:
P*V = n×R×T
where, P is pressure, V is volume, T is temperature.
P = (n×R×T)/ V
P = 1 * 0.08206 * 301 )/15 = 1.6466 atm.
The pressure of the sulfur tetrafluoride gas is 1.64 atm.
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What occurs in photosynthesis reaction
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Answer and Explanation:
Photosynthesis reaction involves two reactants, carbon dioxide and water. These two reactants yield two products, namely, oxygen and glucose.
whats the strongest smell because the bodies in my basement is stinking really bad and i dont want people to find out can you recommend the best fabreeze or something like that
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Answer:
ooooooooooppppppppppppppppppppppppp
Explanation:
KCl + CaNO3 net ionic equation
Answers
KCl → k+ + Cl. The ensuing aggregate of ions is identical in each pre-and publish-blend unit of compounds. both comprise Na+, Cl-, okay+, and Br- ions, and no insoluble compounds can result from any mixture of those ions.
The three rules for writing net ionic equations are simply pretty trustworthy. only do not forget to break apart the (aq) substances. best split strong electrolytes.
Delete any ions that seem on both sides of the equation. when an aqueous solution of potassium chloride KCl, while combined with silver nitrate AgNO3 answers insoluble AgCl forms as a white substance. this is an example of a double displacement reaction. due to the fact potassium ion and silver ions displace collectively in the product formation.
The net ionic equation is a chemical equation for a response that lists best those species collaborating inside the reaction. The internet ionic equation is generally utilized in acid-base neutralization reactions, double displacement reactions, and redox reactions.
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6. How many moles are in 8.30 x 1023 molecules of CO₂?
a.
b.
C.
d.
1.37
2.8
55.5
100
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calculate the number of moles for the quanity 8.06 x 1021 atoms of Pt
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The number of moles for the quanity 8.06 x\(10_{21\) atoms of Pt is approximately 2.61 grams.
To calculate the number of moles for a given quantity of atoms, we can use Avogadro's number and the molar mass of the element. Avogadro's number is 6.022 x 10²³ atoms/mol.
In this case, you have 8.06 x 10²¹ atoms of Pt. To find the number of moles, divide this quantity by Avogadro's number:
8.06 x 10²¹ atoms Pt / 6.022 x 10²³ atoms/mol = 0.0134 mol Pt
So, there are approximately 0.0134 moles of Pt in 8.06 x 10²¹ atoms of Pt.
The molar mass of Pt (platinum) is 195.08 g/mol. To convert the number of moles to grams, multiply the number of moles by the molar mass:
0.0134 mol Pt x 195.08 g/mol = 2.61 g Pt
Therefore, there are approximately 2.61 grams of Pt in 8.06 x10²¹ atoms of Pt.
In summary, the number of moles for the quantity 8.06 x 10²¹ atoms of Pt is approximately 0.0134 moles. This is equivalent to approximately 2.61 grams of Pt. Remember to use Avogadro's number and the molar mass to perform these calculations accurately.
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Determine the molecular formula for a compound that has a molecular mass of 52.0 g/mole
and and is composed of 92.31% carbon and 7.69% hydrogen.
Answers
Answer:
C4H4
Explanation:
92.31% of 52.0 g/mol is 48.0012 g/mol
7.69% of 52.0 g/mol is is 3.9988 g/mol
Carbon has a gram-formula mass of about 12, which goes into 48.0012 about 4 times, so there should be 4 atoms of Carbon
Hydrogen has a gram-formula mass of about 1, which goes into 3.9988 about 4 times, so there should also be 4 atoms of hydrogen
Your lab partner did not take careful notes during today's chemistry experiment. You see these numbers written without labels: 37.3 grams, 40 grams, 93.3% before asking your partner, you decide to predict which number is the predicted yield, the actual yield, and the percent yield. Justify your answer. Make a list of the factors that will increase the reaction rate of a chemical reaction.
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Based on the given information, it is not possible to accurately predict which number is the predicted yield, the actual yield, and the percent yield without additional information or context. The percent yield is calculated by comparing the actual yield to the predicted yield, which are both typically measured in grams or moles.
The list of the factors that will increase the reaction rate of a chemical reaction are
Increasing the temperature Increasing the concentration of reactants Increasing the surface area of the reactants: What is chemical reaction?The Factors that can increase the reaction rate of a chemical reaction include:
Increasing the temperature: as temperature increases, the kinetic energy of the reactant particles increases, making it more likely for them to collide and react. Increasing the concentration of reactants: as the concentration of reactants increases, the number of reactant particles in a given space increases, making it more likely for them to collide and react.Lastly, Increasing the surface area of the reactants: as the surface area of the reactants increases, the number of reactant particles in contact with each other increases, making it more likely for them to collide and react.
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As part of an investigation of the population of foxes on Sunday Gill island a scientist graphed the number of foxes presented on the island over a Spam of 15 years as shown below the study began with the earlier 0 and run until the start of year 15 According to the graph during the witch year the event reduced the carrying capacity of the area
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The carrying capacity of the area was reduced in the year 10 according to the graph that shows the number of foxes on the island over a span of 15 years.
The graph shows a population of foxes over a span of 15 years. The y-axis represents the number of foxes on the island, while the x-axis represents time. The study began with the earlier 0 and ran until the start of year 15. According to the graph, the carrying capacity of the area was reduced in the year 10.
In the graph, it is shown that the population of foxes on Sunday Gill island had a significant increase from year 0 to year 3. After year 3, the fox population started to decrease and then remained fairly constant until year 10. After year 10, the population of foxes on the island started to decline more rapidly until the end of the study in year 15
This decline in the population of foxes on the island is most likely due to the reduction in carrying capacity of the area. Carrying capacity refers to the maximum number of individuals that an environment can sustain. When the carrying capacity of an environment is reached, it means that the environment can no longer provide the necessary resources to sustain the population.
There are various factors that can cause a reduction in carrying capacity, such as environmental degradation, competition for resources, or a natural disaster. In this case, it is not clear what caused the reduction in carrying capacity in year 10, but it is likely that it was due to some environmental factor that impacted the availability of resources for the fox population.
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water has low ____ _____
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Water has low viscosity and low surface tension.
Viscosity refers to the resistance of a fluid to flow, and water has a relatively low viscosity compared to many other liquids. This property is important for many applications, including the movement of water through pipes and the flow of water in rivers and streams.
Surface tension, on the other hand, is the measure of the cohesive force between molecules at the surface of a liquid. Water has a relatively low surface tension compared to some other liquids, which makes it easier for objects to penetrate its surface. This property is also responsible for the formation of droplets and the behavior of water striders and other water-dwelling insects.
Overall, these properties contribute to the unique characteristics of water and its importance in many natural and industrial processes.
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What is the role of light in photosynthesis?
Group of answer choices
Light provides the energy needed to convert water and carbon dioxide into sugar and oxygen.
Light does not play a role in photosynthesis.
Light splits into hydrogen and oxygen. The oxygen becomes waste but the hydrogen reacts with the light to produce glucose.
Light is absorbed by the plant and combines with water to make glucose.
Answers
Answer:
d
d
Explanation:d
How much heat energy, in kilojoules, is required to convert 72.0 g
of ice at − 18.0 C to water at 25.0 C?
Answers
The amount of heat energy required required to convert 72.0 g
of ice at − 18° C to water at 25° C is 31.9 kJ.
To calculate the amount of heat energy required to convert 72.0 g of ice at −18.0°C to water at 25.0°C, we need to consider two separate processes: first, the energy required to melt the ice (i.e., to convert it from a solid to a liquid), and second, the energy required to heat the liquid water from its initial temperature of 0°C to its final temperature of 25°C.
The energy required to melt the ice can be calculated using the formula:
\(Q1 = m × ΔH_fus\)
where Q1 is the heat energy required (in joules), m is the mass of the ice (72.0 g), and\(ΔH_fus\)is the heat of fusion of water (334 J/g).
Q1 = 72.0 g × 334 J/g = 24,048 J = 24.05 kJ
The energy required to heat the liquid water from 0°C to 25°C can be calculated using the formula:
\(Q2 = m × C × ΔT\)
where Q2 is the heat energy required (in joules), m is the mass of the water (also 72.0 g), C is the specific heat capacity of water (4.184 J/g°C), and ΔT is the change in temperature (25°C - 0°C = 25°C).
Q2 = 72.0 g × 4.184 J/g°C × 25°C = 7,845.6 J = 7.85 kJ
Therefore, the total heat energy required to convert 72.0 g of ice at −18.0°C to water at 25.0°C is:
\(Q_total = Q1 + Q2\) = 24.05 kJ + 7.85 kJ = 31.9 kJ
Therefore, the amount of heat energy required is 31.9 kJ.
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Please I need help thank you
Answers
Answer:
its sodium hydroxide
Explanation:
Balance the equation: __MgCl2 + __Cr2O3 --> __MgO + __CrCl3
Answers
We start by counting the number of atoms of each element on each side of the reaction.
Now we balance the reaction by trial and error, starting with chlorine. We have 2 chlorine atoms in the reactants and 3 clear atoms in the products, so to balance we cross the coefficients placing 3 on the reactant side and two on the product side in the respective molecules:
\(3Mg_{}Cl_2+Cr_2O_3\rightarrow MgO+2CrCl_3\)Now we continue with the oxygens, we have 3 oxygens on the reactant side and 1 on the products, so we put the coefficient 3 on the products side in front of the respective molecule:
\(3Mg_{}Cl_2+Cr_2O_3\rightarrow3MgO+2CrCl_3\)We now have the balanced equation. We have 3 Mg atoms, 6 Cl atoms, 2 Cr atoms, and 3 O atoms on each side of the reaction.
What is the total number of nitrogen atoms in two mol of NH4NO3?
Answers
Answer:
the answer is B if one mol contains of NH4NO3 contains 6.02X 10^23
People living in some countries have a difficult time obtaining foods that are high in vitamin A. Which advantage of genetic technologies would these people most benefit from? O higher tolerance of crops to temperature changes O decreased crop resistance to disease O lowered cost of food production O increased nutritional value of crops hurry up asap
Answers
Answer:
the answer i believe is increased nutritional value of crops
Explanation:
Answer: increased nutritional value of crops
Explanation:) edge 2022
Write the balanced molecular chemical equation for the reaction in aqueous solution for sodium hydroxide and tin (IV) acetate. If no reaction occurs, simply write only NR.
Be sure to include the proper phases for all species within the reaction.
Answers
The balanced molecular chemical equation for the reaction in aqueous solution for sodium hydroxide and tin (IV) acetate is 4 NaOH (aq) + Sn (CH\(_3\)COO) (aq) → Sn (OH)(s) + 4 CH\(_3\)COONa (aq) .
An equation per a chemical reaction is said to be balanced if both the reactants plus the products have the same number of atoms and total charge for each component of the reaction. In other words, each component of the reaction have an equal balance of mass and charge. The balanced molecular chemical equation for the reaction in aqueous solution for sodium hydroxide and tin (IV) acetate is 4 NaOH (aq) + Sn (CH\(_3\)COO) (aq) → Sn (OH)(s) + 4 CH\(_3\)COONa (aq) .
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Would phosphoric acid or succinic acid be a better buffer at ph5?
Answers
Answer:
Explanation:
For the pH value of a buffer solution , the Henderson formula given is as follows
pH = pKa + log [ A⁻] / [AH ]
Now let us discuss about the phosphoric and succinic acid . The phosphoric acid has a pKa value of 2.3 and for succinic acid , the pKa value is 4.2 . The pKa value of succinic acid is more close to 5 . So to achieve pH value of 5 , succinic acid is a better alternative . The value of [ A⁻] / [AH ] is kept almost equal to 1 to increase the buffer capacity .
Describe the motion of particles of a gas according to kinetic energy
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How does Perth’s water cycle work?
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4. Calculate the number of moles in each of the following quantities:
b. 1.06 x 1023 atoms of tungsten
Answers
The number of mole in 1.06×10²³ atoms of tungsten is 0.176 mole
How do i determine the number of mole?The following data were obtained from the question:
Number of atoms = 1.06×10²³ atomsNumber of mole =?The number of mole that contains 1.06×10²³ atoms of tungsten can be obtained as illustrated below:
From Avogadro's hypothesis,
6.022×10²³ atoms = 1 mole of substance
Thus, we can say that
6.022×10²³ atoms = 1 mole of tungsten
Therefore,
1.06×10²³ atoms = (1.06×10²³ atoms × 1 mole) / 6.022×10²³ atoms
1.06×10²³ atoms = 0.176 mole of tungsten
Thus, we can conclude from the above calculation that the number of mole is 0.176 mole
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why it is wrong to use the term 'Pure Air' in Science?
Answers
Explanation:
Air is a combination of other gases, dust particles, pollens, spores etc. This means that air is a heterogeneous mixture where particles are unevenly distributed.
Air is not considered as a pure substance because there is not one element present in air. A substance which contains only one type of element is called a pure substance.
Therefore, it is wrong to use the term 'Pure Air' in Science.