Answer:
A positive charge of +1
Explanation:
The charge carried by atom depends on the number of protons and electrons present. The neutrons are not charged hence they do not contribute to the net charge of the specie.
The specie mentioned in the question has six protons and five electrons. Hence it has an excess of one positive charge hence a net charge of +1.
ANSWER:
ABCDFGHIJKLMNOPQRSTXYZ
Brifly explain the chemical reaction and state one example (in word equation). i: Neutralization reaction
Answer:
Neutralization refers to aa chemical reaction where an acid and a base react with each other quantitatively.
Example:
Hydrochloric acid + Sodium hydroxide → Sodium chloride + Water ( word equation)
Explanation:
Though we haven't been asked to write down chemical equation, it is good to know.
Here is the equation:
HCl(aq) + NaOH(aq) → NaCl (aq)+ H2O (l)
Which statement describes a step in the formation of an ionic bond?
Answer:
Which statement describes a step in the formation of an ionic bond? An attraction occurs between two ions that have the same charge.
Explanation:
Write the balanced NET ionic equation for the reaction when AICI3 and Na₂S are mixed in aqueous solution. If no reaction occurs, simply write only NR. Be sure to include the proper phases for all species within the reaction.
Answer:
2AlCl3(aq) + 3Na2S(aq) = Al2S3(aq) + 6NaCl(aq)
Explanation:
First, you have to write down a complete equation as shown below:
AlCl3 + Na2S → Al2S3 + NaCl.
When you at the above equation is not balanced.
To balance the equation, we have to identify the number of products and reactants.
Al: 1a + 0b = 2c + 0d, we have 2 Al
Cl: 3a + 0b = 0c + 1d, we have 3Cl
Na: 0a + 2b = 0c + 1d, we have 2Na
S: 0a + 1b = 3c + 0d, we have 3S
Then we simplify to obtain the lowest whole integer value:
a = 2 (AlCl3)
b = 3 (Na2S)
c = 1 (Al2S3)
d = 6 (NaCl)
Substitute the values to our first equation giving us,
2AlCl3 + 3Na2S = Al2S3 + 6NaCl,
We then include the states. Since the reaction is in aqueous solution, we insert (aq)
2AlCl3(aq) + 3Na2S(aq) = Al2S3(aq) + 6NaCl(aq)
Since there is an equal number of each element in the reactants and products of 2AlCl3(aq) + 3Na2S(aq) = Al2S3(aq) + 6NaCl(aq), the equation is balanced.
Thus our required equation is
2AlCl3(aq) + 3Na2S(aq) = Al2S3(aq) + 6NaCl(aq)
(a) 1.42 light-years to miles (a light-year is an astronomical measure of distance—the distance traveled by light in a year, or 365 days; the speed of light is 3.00 × 108 m/s).
The value in mile is 8.35 * 10^12 miles.
What is conversion?It is often important to be able to convert values from one unit to another. This has always helped to make mathematical and physical computations much easier.
The conversion factor is often used to convert from one unit to another. It serves as bridge that would enable us to be able to convert quantities. The conversion factor has to be dimensionally correct.
Let us now convert 1.42 light-years to miles;
1.42 light years * 3.00 × 108 m/1 s * 1 mi/1609 m * 3600 s/1 hr * 24 hrs/1 day * 365 days/1 year
= 8.35 * 10^12 miles
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Hello- is anyone available to help me?
If the concentration inside the cell is 5% and the concentration outside the cell is 6%, this solution will be hypertonic.
If the concentration inside the cell is 3% and the concentration outside the cell is 1%, this solution will be hypotonic.
What is hypertonic solution?Hypertonic solution is a solution that contains more dissolved particles (such as salt and other electrolytes) than is found in normal cells and blood.
A solution will be hypertonic to a cell if the outside concentration is higher than that inside the cell, and the solutes cannot cross the membrane.
What is hypotonic solution?Hypotonic solution is a solution that contains fewer dissolved particles (such as salt and other electrolytes) than is found in normal cells and blood.
A solution will be hypotonic to a cell if the outside concentration is lower than that inside the cell, and the solutes can cross the membrane.
Thus, if the concentration inside the cell is 5% and the concentration outside the cell is 6%, this solution will be hypertonic.
if the concentration inside the cell is 3% and the concentration outside the cell is 1%, this solution will be hypotonic.
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I don't know what this is they havent taught it yet or I didnt pay attention
Answer:
2-1
Explanation:
=1
TRUE or FALSE: As temperature increases, the speed of sound decreases.
Answer:
TRUE
Explanation:
Answer:
True
Explanation:
because high energy molecules carry the sound more quickly
What qualities do you think are important for a scientist to have? Give an example of how one of these qualities is shown in your own approach to your schoolwork. Answer in two to three paragraphs. (10 points) Think about what a scientist does in order to obtain reliable information. Do you do any of these things?
Important qualities for scientists to have are curiosity, patience, creativity, persistence, communication, and intelligence.
Hard effort, intelligence, and the ability to effectively manage your time and tasks are, in my opinion, some crucial characteristics for a scientist to possess. Being a scientist will need you to spend a lot of time in a lab or out in nature. It takes skill to meticulously record vital and fascinating information. Additionally, you'll need to be diligent because it's crucial for scientists to put in a lot of effort and produce reliable results.
I believe that hard work is a quality that comes through in my academic performance. I always give my tasks my best effort. I make a consistent effort to get ahead and complete my task on schedule. I have to work less as I work harder. I keep myself busy, which causes me to become less busy.
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The pressure exerted by 0.25mol of carbon monoxide in 10dm3 flask is 120kPa. Calculate the temperature in the flask in kelvin.
The temperature in the flask in kelvin is 577.3 K.
What is the relationship between volume, temperature, moles and pressure of a gas?The relationship between volume, temperature, moles and pressure of a gas is given by the ideal gas equation written below:
PV = nRTwhere;
P is pressureV is volumen is number of moles of the gasR is molar gas constantT is temperatureFor the gas:
P = 120 kPa
n = 0.25 moles
V = 10 dm³
R = R = 8.314 dm³.kPa/mol.K
T = ?
T = PV/nR
T = 120 * 10/8.314 * 0.25
T = 577.3 K
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Pls help.
Carbohydrates are made up of carbon, hydrogen, and another element.
What is that element?
A. helium
B. potassium
C. copper
D. oxygen
HOW DOES WALTER WHITE SLEEP AT NIGHT
Answer:
Since Walter can alter time and space he doesn't have the kind of place to take a nap or buy a cap for his dog zap
Explanation:
Answer:
Breaking Bad
Explanation:
walt
Type a response
*REQ
How many protons are in the nucleus of an atom with an atomic number of 15?
Type a response
You have responded to 0 of 4 questions.
Submit
Answer:
15
Explanation:
the proton and atomic number are the same hence it remains 15
How many atoms are in 5.00 moles of Mn?
Answer:
3.01 x 10²⁴ atoms Mn
Explanation:
To find the number of manganese (Mn) atoms, you need multiply the given mole value by Avogadro's Number. Avogadro's number is a ratio which represents the number of atoms per every 1 mole. It is important to arrange the ratio in a way that allows for the cancellation of units (moles should be in the denominator to cancel the units of the given value). The final answer should have 3 sig figs like the given value (5.00 = 3 sig figs).
Avogadro's Number:
6.022 x 10²³ atoms = 1 mole
5.00 moles Mn 6.022 x 10²³ atoms
------------------------- x -------------------------------- = 3.01 x 10²⁴ atoms Mn
1 mole
write a complete ionic equation for the following molecular equation. 2 K3PO4
+ 3 FeBr2
-
6 KBr
+ Fe3(PO4)2
A chemical equation known as an ionic equation expresses the electrolytes in an aqueous solution as dissociated ions. The net ionic equation will be:
3 Fe²⁺(aq)+2PO₄³⁻(aq)⇒Fe₃(PO₄)₂ (s).
What is an Ionic equation?Chemical equations known as ionic equations solely display the ions involved in a chemical reaction. Or, the ions that combine in a solution to react and create new compounds. Those ions that don't take part are referred to as spectator ions.
Ionic equations are used to simplify chemical equations by getting rid of species that aren't changing. This is highly helpful, especially when dealing with redox processes, which are challenging enough without the interference of spectator ions.
According to the question,
PO₄³⁻ phosphate of Na⁺, K⁺, Li⁺, NH₄⁺ group 1 and NH₄⁺ Soluble.
Other than that are insoluble so, Fe₃(PO₄)₂ is soluble.
Molecular equation is :
2k₃PO₄(aq)+3FeBr₂(aq)⇒6 KBr(aq)+Fe₃(PO₄)₂ (s)
So, complete ionic equation will be :
6 K⁺(aq)+2PO₄³⁻(aq)+3Fe²⁺(aq)+6Br⁻(aq)⇒6K⁺(aq)+6Br⁻(aq)+Fe₃(PO₄)₂ (s)
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How do you convert 134 kJ to Cal
Ayo who can answer this with one hundred ayo's you a real one if you can cuh
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4. Consider Limitations Students were given the following sets of items and asked, for each set, to identify which item had greater thermal energy. For which set would this task be most difficult? Explain. Set 1: 5 g of iron at 45°C and 10 g of iron at 45 °C Set 2: 10 g of water at 30°C and 10 g of water at 50°℃ Set 3: 32 g of copper at 50°C and 32 g of nickel at 50°C
Set 1 is difficult.
The formula for thermal energy is given as:
Q = mcΔT
Where m is the mass of the item, c is specific heat capacity and ΔT is the change in temperature when the item is heated.
For Set 1:
5 g of iron at 45°C and 10 g of iron at 45 °C
In this case, the mass of iron is different at the same temperature. Since there is no change in temperature hence the metal is not heated. Another reason is that the mass of iron is different in this case. Hence, this set will be difficult to find thermal energy.
Set 2:
10 g of water at 30°C and 10 g of water at 50° C
The mass of water at both temperatures is the same, and the water is heated from 30°C to 50° C The thermal energy can be easily calculated using the formula Q = mcΔT.
Set 3:
2 g of copper at 50°C and 32 g of nickel at 50°C
The mass of copper remains unchanged, also the temperature doesn't change. Since copper is not heated and the temperature remains constant. Hence the thermal energy will be zero.
Therefore, Set 1 will be the most difficult to find the thermal energy.
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Plutonium-238 undergoes alpha decay as shown:
238 PuX+He
94
Enter the appropriate values for A and Z and the chemical
symbol for X.
A:
Z:
X:
0
Alpha decay of Plutonium-238 into Uranium-234. Therefore, A = 234, Z = 92, X = U
A radioactive process known as "alpha decay" releases a particle made up of two protons and two neutrons when an unstable nucleus transforms to another element. The helium nucleus that is being expelled is known as an alpha particle. Positive charge and a substantial mass characterize alpha particles.
An atomic nucleus emits an alpha particle (the helium nucleus), which causes it to change or "decay" into another atomic nucleus with a mass number that is decreased by four and the atomic number is reduced by two. This process is known as alpha decay or α-decay.
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The half-life of radioactive chromium-51 is 28 days. If a sample of chromium-51 has a mass of 12.0 μg , calculate the number of days it will take for the mass to be reduced to 3.00 μg .
It takes a total of 56 days for the mass of the chromium-51 to be reduced from 12.0 μg to 3.00 μg.
What is the half life?The half life of a radioactive sample refers to the time taken for only half of the radioactive substance that is originally present to decay. Now we know that radioactivity has to do with the spontaneous disintegration of a substance. This implies that the amount of the substance would continue to decreases as the time goes on.
Having said this, let us consider the question as we have it above. We all know that; the half-life of radioactive chromium-51 is 28 days then the sample of chromium-51 has a mass of 12.0 μg. We are to now obtain the number of days it will take for the mass to be reduced to 3.00 μg .
Hence;
t1/2 = 28 days
N = 3.00 μg
No = 12.0 μg
t = ?
Using;
N/No = (1/2)^t/t1/2
3/12 = (1/2)^t/28
1/4 = (1/2)^t/28
(1/2)^2 = (1/2)^t/28
2 = t/28
t = 56 days
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Name and Title:
Include your name, instructor's name, date, and name of lab.
Objective(s):
In your own words, what was the purpose of this lab?
Hypothesis:
In this section, please include the if/then statements you developed during your lab activity. These statements reflect your predicted outcomes for the experiment.
If predators are increased, then the cricket frog population will (increase/decrease/stay the same) over the span of five years.
If pollution is increased, then the cricket frog population will (increase/decrease/stay the same) over the span of five years.
If the amount of food available is increased, then the cricket frog population will (increase/decrease/stay the same) over the span of five years.
Procedure:
The procedures are listed in your virtual lab. You do not need to repeat them here. Please be sure to identify the test variable (independent variable), outcome variable (dependent variable), and control group for this experiment.
Reminder: The test variable is the item that is changing in this investigation. The outcome variable is the item that you are measuring in this investigation. The control group is the group in the experiment where the factors being tested are not applied. It allows scientists to set a baseline to compare the experimental groups that do have factors applied to them.
Test variable (independent variable):
Outcome variable (dependent variable):
Control group:
Data:
Record your data from each trial in the data chart below:
Type of Factor Beginning Frog Count Simulation 1 (Low) Simulation 2 (High)
Predators (alligators)
Pollution
Food (mosquitoes)
Graphs
Use the graphs you printed from the data chart in the virtual lab and analyze the data. Make a note of any trends that you discover.
Predators (alligators):
Pollution:
Food (mosquitoes):
Conclusion:
Your conclusion will include a summary and an interpretation of the lab results. Please write in complete sentences.
Which limiting factor(s) in this lab simulation are biotic?
Which limiting factor(s) in this lab simulation are abiotic?
Which limiting factor impacted the cricket frog population the most? Use evidence to support your answer.
Which limiting factor impacted the cricket frog population the least? Use evidence to support your answer.
Mosquitoes can carry and transmit disease to animals and humans. Explain how the cricket frog plays an important role in limiting the spread of mosquito-borne illnesses like West Nile virus and malaria.
Predict the long-term effects of these limiting factors on the cricket frog population in the pond ecosystem.
1)The limiting factor in this lab simulation are biotic is Predator and Food.
2)The limiting factor in the lab simulation are abiotic is Pollution.
3)The limiting factor impacted the cricket frog population the most is Predator.
4)The limiting factor impacted the cricket frog population least is pollution.
1)The predator and Food are the biotic limiting factor in this simulation because predator can eat the population of cricket frog and will reduce the population of cricket frog. animals eaten by food is biotic.
2) Pollution in the lab simulation is abiotic factor because it is non living things.
3) The limiting factor impacted the cricket frog population most is predator because for the predator , the cricket frog were the good source of food.
4) Pollution is the limiting factor which affect the cricket frog population because their growth was not much affected by pollution.
5) The cricket frog plays an important role in limiting the spread of mosquito - borne illness like west Nile virus and Malaria because cricket frog consumes mosquitoes and decrease the population of contaminated mosquitoes.
6) The long term effects of these limiting factors on the cricket frog population in the pond eco system is that if the predators increases the population of cricket frog decreases and if the food sources decreases (mosquitoes) then cricket frog die and population decreases and vice - versa.
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List the ways in which lightning can be produced.
Convert a length of 22.0 m to inches
Answer:
866.142 inches
Explanation:
By formula
How much water is in this cylinder?
Answer:
It's about 13 mL, read it where the lowest point is,
Explanation:
Can I have brainliest? It would help me out, if not thanks anyways! Hope this helped and have a nice day :)
Answer:
About 12.7mL
Explanation:
You always have to count the dip portion of the liquid. It's okay if the number is an estimate. There won't be an exact answer. My chemistry teacher says to not round the answer. Hope this helps!
The old, depressed house moaned as the wind blew.
Alliteration
Allusion
Assonance
Hyperbole
Metaphor
Onomatopoeia
Oxymoron
Personification
Simile
An metal rod weighing 123 g with a temperature of 100.°C is placed in 75 mL of water at 25.0 °C. If the final
temperature of the metal and water is 29.0 °C, what is the specific heat capacity of the metal? (Assume that
the density of water is 1.0 g/mL and specific heat capacity of water is 4.184 J/g°C.)
O 0.23 J/gºC
O 0.14 J/gºC
O 3.6 J/gºC
O 1.6 J/gºC
The specific heat capacity of the metal rod weighing 123g is 0.14 J/gºC (option B).
How to calculate specific heat capacity?The specific heat capacity of a metal substance can be calculated using the following formula:
Q = mc∆T
Where;
Q = heat absorbed or releasedm = mass of substancec = specific heat capacity∆T = change in temperatureHowever, in a calorimeter, the metal and water relationship is given as follows:
Q (water) = - Q (metal)
mc∆T (water) = - mc∆T (metal)
Mass of water = density × volume
Mass of water = 1g/mL × 75mL = 75g
75 × 4.184 × {29°C - 25°C} = - {123 × c × (29 - 100)}
1255.2 = 8733c
c = 1255.2/8733
c = 0.144J/g°C
Therefore, the specific heat capacity of the metal rod weighing 123g is 0.14 J/gºC.
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how many significant figures are in 6.044
Answer: 4
Explanation: There are 4 sig figs because 6 and 4 are always considered significant. And a 0 is considered a sig fig if it's between two numbers besides 0 or if it's after a decimal point.
The initial temperature of 100.0 mL of water was 25 oC. The water was then heated to 89 oC. How much heat (in J) was required for this temperature change?
The amount of heat (in J) required for the temperature change is 26752 J.
What is the amount of heat required to raise the temperature of water from 25°C to 89°C?The amount of heat required to raise the temperature of water from 25°C to 89°C is calculated as follows:
Heat required = mass * specific heat capacity * temperature changeMass of water = volume * density
density of water = 1 g/mL
volume of water = 100 mL
mass of water = 100 mL * 1 g/mL
mass of water = 100 g
heat capacity of water = 4.18 J/g°C
Temperature change = 89 - 25 = 64 °C
Heat required = 100 * 4.18 * 64
Heat required = 26752 J
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PLEASE ANSWER I REALLY NEED IT ITS DUE IN AN HOUR FOR A CROSSWORD
(what) include Filtration,Chromatography, and Distillation.
Filtration simply refers to a method of septation technique which is used to separate insoluble solid from liquid.
For example, the suspension of chalk dust in water can be bestseparated using filtration.
Chromatography is a method of separation technique used to separate the mixture of complex substances such as coloured pigments or components. It can also be used to separate substances which are colourless.Distillation is used to separate mixtures of different miscible liquids.All these explained above are various types of separation techniques in chemistry.
Insoluble solids are solids which cannot dissolve in water.
Miscible liquids are liquid which combine together to form a single liquid.
What is separation technique?Separation technique refers to the process of separating the components of mixtures.
So therefore, filtration simply refers to a method of septation technique which is used to separate insoluble solid from liquid.
Complete question:
Explain what is meant by filtration, chromatography and distillation.
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How many atoms of hydrogen are in 1.255 grams of aluminum hydroxide?
The number of atoms of hydrogen present in 1.255 g of aluminum hydroxide, Al(OH)₃ is 2.89×10²² atoms
How to determine the mole of 1.255 g of Al(OH)₃Mass of Al(OH)₃ = 1.225 gMolar mass of Al(OH)₃ = 27 + 3(16 + 1) = 78 g/molMole of Al(OH)₃ =?Mole = mass / molar mass
Mole of Al(OH)₃ = 1.255 / 78
Mole of Al(OH)₃ = 0.016 mole
How to determine the mole of hydrogen1 mole of Al(OH)₃ contains 3 moles of H.
Therefore,
0.016 mole of Al(OH)₃ will contain = 0.016 × 3 = 0.048 mole of H
How to determine the number of atoms in 0.048 mole of hydrogenFrom Avogadro's hypothesis
1 mole of hydrogen = 6.02×10²³ atoms
Therefore,
0.048 mole of hydrogen = (0.048 mole × 6.02×10²³ atoms) / 1 mole
0.048 mole of hydrogen = 2.89×10²² atoms
Thus, we can conclude that 2.89×10²² atoms of hydrogen are present in 1.255 g of Al(OH)₃
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If 0.459 g of an unknown sugar is dissolved in 100.0 mL of water its osmotic pressure is found to be 0.0824 atm.. If the temperature of the solution was 298 K, what is the molar mass of the sugar (in g/mol)? Give your answer to three sig figs
If 0.459 g of an unknown sugar is dissolved in 100.0 mL of water its osmotic pressure is found to be 0.0824 atm. The molar mass of the sugar (in g/mol) is \M = 3.0067.
What is molar mass?"Molar mass of many compounds can be calculated by dividing the mass of the compound by the number of moles of the compound."
Given, that the mass of unknown sugar= 0.459 g
Volume of water = 100.0 mL
Osmotic pressure to be 0.0824 atm
The temperature of the solution = 298 K
Calculating the moles
PV = nRt
R = 8.314, constant
0.0824 X 100.0 = n x 8.314 x 298
8.24 = n x 2477.57
n = 300.67
Now, calculating the molar mass
Molar mass = n / V
300.67 / 100.0
M = 3.0067
Thus, the molar mass of the sugar is 3.0067
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