Answer:
elevation
Explanation:
Calculate the amount, in moles, of PO43- present at equilibrium when excess Sr3(PO4)2 is added to 750. mL 1.2 M Sr(NO3)2(aq). Assume no change in volume. For Sr3(PO4)2, Ksp = 1.0×10-31.
Answer:
1.8 × 10⁻¹⁶ mol
Explanation:
(a) Calculate the solubility of the Sr₃(PO₄)₂
Let s = the solubility of Sr₃(PO₄)₂.
The equation for the equilibrium is
Sr₃(PO₄)₂(s) ⇌ 3Sr²⁺(aq) + 2PO₄³⁻(aq); Ksp = 1.0 × 10⁻³¹
1.2 + 3s 2s
[tex]K_{sp} =\text{[Sr$^{2+}$]$^{3}$[PO$_{4}^{3-}$]$^{2}$} = (1.2 + 3s)^{3}\times (2s)^{2} = 1.0 \times 10^{-31}\\\text{Assume } 3s \ll 1.2\\1.2^{3} \times 4s^{2} = 1.0 \times 10^{-31}\\6.91s^{2} = 1.0 \times 10^{-31}\\s^{2} = \dfrac{1.0 \times 10^{-31}}{6.91} = 1.45 \times 10^{-32}\\\\s = \sqrt{ 1.45 \times 10^{-32}} = 1.20 \times 10^{-16} \text{ mol/L}\\[/tex]
(b) Concentration of PO₄³⁻
[PO₄³⁻] = 2s = 2 × 1.20× 10⁻¹⁶ mol·L⁻¹ = 2.41× 10⁻¹⁶ mol·L⁻¹
(c) Moles of PO₄³⁻
Moles = 0.750 L × 2.41 × 10⁻¹⁶ mol·L⁻¹ = 1.8 × 10⁻¹⁶ mol
To calculate the amount of PO4^3- present at equilibrium, we can use the stoichiometry of the reaction and the amount of Sr3(PO4)2 added. Since the reaction has a 1:2 stoichiometry, the amount of PO4^3- is twice the amount of Sr3(PO4)2 added. The amount of Sr3(PO4)2 added can be calculated using the molarity and volume of the Sr(NO3)2 solution.
Explanation:To calculate the amount of PO43- present at equilibrium, we need to use the concept of solubility product constant (Ksp) and the stoichiometry of the reaction.
First, let's write the balanced equation for the reaction:
Sr3(PO4)2(s) → 3Sr2+(aq) + 2PO43-(aq)
According to the stoichiometry of the reaction, 1 mole of Sr3(PO4)2 produces 2 moles of PO43-. Therefore, if we have excess Sr3(PO4)2, all Sr3(PO4)2 will dissolve and the amount of PO43- at equilibrium is equal to twice the amount of Sr3(PO4)2 added.
Since we have 750 mL of 1.2 M Sr(NO3)2, we can calculate the amount of Sr3(PO4)2 added:
750 mL * 1.2 mol/L = 900 mol Sr2+
Therefore, the amount of PO43- present at equilibrium is 2 * 900 mol = 1800 mol.
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I NEED HELP ASAP!!!!
The animal-like parasite plasmodium causes the disease?
PLEASE HURRY
Answer: malaria
Explanation:
Answer:
malaria
Explanation:
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.
Consider the reaction below.
2NH3(e) N218) + 3H218)
What is the most likely effect to the forward reaction if there is an increase in pressure on this reaction?
The reactant surface area increases
The reaction rate decreases.
The reaction is not affected at all.
The reaction stops completely
SOMEONE PLEASE HELP!!! How much energy was required to heat a 5.00g sample of liquid water at 25.0°C to 100°C? (Specific heat of water is 4.184J/g°C).
Answer:
Q = 1569 j
Explanation:
Given data:
Mass of water = 5.00 g
Initial temperature = 25.0°C
Final temperature = 100°C
Cp = 4.184 j/g.°C
Energy needed = ?
Solution:
Specific heat capacity:
It is the amount of heat required to raise the temperature of one gram of substance by one degree.
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
ΔT = 100°C - 25°C
ΔT = 75°C
Q = 5 g× 4.184 j/g.°C×75°C
Q = 1569 j
19. Which atom in a water molecule has the greatest electronegativity?
a. one of the hydrogen atoms
b. both hydrogen atoms
c. the oxygen atom
d. There is no difference in the electronegativities of the atoms in a water molecule.
Answer:
The Oxygen Atom
Explanation:
The oxygen atom in a water molecule has the greatest electronegativity. Therefore, the correct option is option C.
What is electronegativity?The tendency of an atom of a particular chemical element could attract shared electrons while forming a chemical bond is represented by the symbol. The electronegativity of an atom is determined both by its atomic number as well as the distance between its valence electrons and the charged nucleus.
The higher the related electronegativity, the more electrons an atom or substituent group attracts. Electronegativity is a simple approach to quantify bond energy as well as the sign and degree of a bond's molecular polarity, that describes a bond all along continuum between covalent through ionic bonding. The oxygen atom in a water molecule has the greatest electronegativity.
Therefore, the correct option is option C.
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What is sound energy? Give two examples.
Answer:
Sound energy is a form of energy that can be heard by humans.
Ex- buzzing bee, balloon popping
Explanation:
The table below describes the temperature of different colors of stars.
Color Temperature
red under 3,500 K
orange-red 3,500 - 5,000 K
white-yellow 5,000 - 6,000 K
blue-white 6,000 - 7,500 K
blue 7,500 - 25,000+ K
If the Sun is white-yellow, which of the following is a reasonable approximation of its temperature?
Answer:
D
Explanation:
5,778K
Answer:red
Explanation:
The stars can be classified in many ways, including by mass, color, and temperature. The color and the temperature of a star are usually related.
Antares is a red supergiant.
At which type of plate boundary will a trench most likely form?
A:
B:
C:
D:
Answer:
A
Explanation:
they pull apart if u see the first one they go like this < > leaving a gap in the middle
In type A of plate boundary, a trench will most likely to form ocean trenches are caused by tectonic activity, which is the movement of the Earth's lithosphere, hence option A is correct.
Oceanic trenches are long, narrow, noticeable topographic depressions on the ocean bottom. They are normally 50 to 100 kilometers broad and 3 to 4 kilometers below the surrounding marine bottom, but can stretch for thousands of km.
Ocean trenches, in particular, are a hallmark of convergent plate boundaries, when two or more tectonic plates collide.
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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.
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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A 70-liter tank of oxygen gas at 27 degree Celcius and 42.0 atm springs a leak overnight. when the tank was found in the morning, the pressure in the tank had dropped to 19.0 atm. If the tank originally held 119.4 moles of oxygen gas, how many moles of gas were left the next morning, assuming the temperature and volume of the rank stayed constant?.
54.03 moles of gas were left the next morning, assuming the temperature and volume of the tank stayed constant.
Explanation:
Status of the oxygen gas at night or initial conditions.
volume of the tank = 70 litre
temperature = 27 degree celsius or 300.15 K
pressure = ?
number of moles of oxygen = 119
R = 0.0821 L atm/mole K
applying gas law
PV = nRT
P = [tex]\frac{0.0821 X 119.4 X 300.15}{70}[/tex]
P = 42 atm
in the morning
volume = 70 litres
temperature = 300.15 K
Pressure = 19 atm
n = ?
R = 0.0821 L atm/mole K
Applying Ideal Gas law,
PV= nRT
putting the values in the formula:
n = [tex]\frac{19 X 70}{0.0821 X 300.15}[/tex]
n = 54.03 moles will be left in the morning.
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:
The average adult human burns 2.00x20^3 kcal per day in energy. What is this rate in kJ per hour?
Answer:
1.61 × 10⁶ kJ
Explanation:
The human burns energy so as to be healthy.
The amount of energy burnt per day by an adult human is 2 × 20³ kcal per day. Since there is 24 hours in a day, the amount of energy burnt per hour is 2 × 20³ × 24 = 48 × 20³ kcal per hour.
The conversion rate of kcal to kJ is 1 kcal = 4.184 kJ. Therefore converting the kcal per hour to kJ per hour gives:
48 × 20³ × 4.184 = 200.882 × 20³ kJ = 1.61 × 10⁶ kJ
Final answer:
Rate in kJ per hour = 34.93 kJ/hTo convert the rate from kcal per day to kJ per hour, you can multiply the average daily energy burn by the conversion factor of 4.184 kJ/kcal and 1 day/24 hours.
Explanation:
To convert kcal to kJ, we can multiply by a conversion factor of 4.184.
Therefore, to find the rate in kJ per hour, we can multiply the average daily energy burn by the conversion factor for both kcal to kJ and hours to days.
The calculation would be:
Rate in kJ per hour = (2.00x10³ kcal/day) x (4.184 kJ/kcal) x (1 day/24 hours)
The rate in kJ per hour = 34.93 kJ/h
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
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.
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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Approximately how many mineral species have scientists identified?
250
5000
1500
60
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.
PLEASE HELP!!! ON A TIMER, WILL MARK BRAINLIEST
Which equation represents the correct net ionic equation for the reaction between Ca(OH)2 and H2SO4?
Upper H superscript plus, plus upper O upper H superscript minus right arrow upper H subscript 2 upper O.
2 upper H superscript plus, plus 2 upper O upper H superscript minus right arrow upper H subscript 2 upper O.
Upper C a superscript 2 plus, plus 2 upper O upper H superscript minus, plus upper S upper O subscript 4 superscript 2 minus right arrow upper C a superscript 2 plus, plus upper S upper O subscript 4 superscript 2 minus, plus 2 upper H subscript 2 upper O.
Upper C a (upper O upper H) subscript 2 plus upper H subscript 2 upper S upper O subscript 4 right arrow upper C a upper S upper O subscript 4 plus 2 upper H subscript 2 upper O.
Answer:
its not 2H+ + 2OH- -> H20
Explanation
answer is A on ed2020
The net ionic equation for the reaction between Ca(OH)2 and H2SO4 is; 2OH^-(aq) + 2H^+(aq) ----->2H2O(l).
What is net ionic equation?The net ionic equations shows the ions that underwent a change in te cause of the reaction. Hence, the net ionic equation would always exclude the spectator ions.
In this case, the net ionic equation is; 2OH^-(aq) + 2H^+(aq) ----->2H2O(l). The calcium and the sulfate ions are spectator ions.
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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
Calculate the energy in joules, 245 Calories = __joules
C
.
245 Calories
Answer:
1025.05
Explanation:
1calories=4.184 joulse
so if multiply 245 by 4.184
The calculation of energy from calories to joules is determined below:
245 Calories = 1029 joules. What is One Joule?One Joule may be defined as the amount of energy that is significantly required to be exerted when a force of one newton is put in an application over a displacement of one meter.
The calorie may be defined as the amount of heat needed at a pressure of 1 atm in order to enhance that temperature of 1 gram of any solution by 1°C.
According to the question,
The total amount of calories = 245.
As per the common calculation or conversion factors,
1 calorie ≅ 4.2 Joules.
∴ 245 calories = 245 × 4.2 = 1029 Joules.
Therefore, according to the calculation, the total amount of energy in 245 Calories is equal to 1029 joules.
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What is the Molarity of the Sulfate ion in a 2M K2SO4 solution?
Answer: The Molarity of the sulphate ion in a 2M [tex]K_2SO_4[/tex] solution is 2M
Explanation:
Molarity is defined as the number of moles of solute dissolved per liter of the solution.
[tex]Molarity=\frac{n\times 1000}{V_s}[/tex]
where,
n= moles of solute
[tex]V_s[/tex] = volume of solution in ml
[tex]K_2SO_4\rightarrow 2K^{+}+SO_4^{2-}[/tex]
Now as 1 mole of [tex]K_2SO_4[/tex] gives = 1 mole of [tex]SO_4^{2-}[/tex]
2 moles of [tex]K_2SO_4[/tex] gives =[tex]\frac{1}{1}\times 2=2[/tex] moles of [tex]SO_4^{2-}[/tex]
Thus Molarity of the sulphate ion in a 2M [tex]K_2SO_4[/tex] solution is 2 M
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!
What information do you need to convert between moles and mass of a substance?
Answer:A substance's molar mass is calculated by multiplying its relative atomic mass by the molar mass constant (1 g/mol). The molar mass constant can be used to convert mass to moles. By multiplying a given mass by the molar mass, the amount of moles of the substance can be calculated.
Explanation:
Answer: molar mass
Explanation:
Mole = mass/molar mass
Mass = molar mass × mole
Sprite has a [H+] = .000045 M. What is its pH?
Final answer:
The pH of Sprite with a [H+] concentration of .000045 M is approximately 4.35, which is calculated using the formula pH = -log([H+]).
Explanation:
To calculate the pH of Sprite, which has a hydrogen ion concentration [H+] = .000045 M, we use the formula pH = -log([H+]). By inserting the given concentration into this formula, we find that pH = -log(.000045). Using a calculator to perform this logarithm results in a pH of approximately 4.35.
This calculation demonstrates the acidic nature of Sprite, as a pH lower than 7 indicates an acidic solution. The understanding of pH is crucial in chemistry to determine the acidity or basicity of a solution.
The letter R indicates round seeds that are dominant over the wrinkled variety, represented by r. Create a Punnett square by selecting the genetic makeup of the parents. You can make the parents both homozygous, both heterozygous, or a combination. Show the possible outcomes of the traits in their offspring.
Answer and Explanation:
Let's just make it easy and have both parents be heterozygous. This means that they each have 1 dominant allele (R) and 1 recessive allele (r). Make a Punnett Square (see attachment).
The possible outcomes are RR (one of it), Rr (two of it), and rr (one of it). That means that phenotypically, 3 of the offspring will be round and 1 will be wrinkled.
Answer:
Rr, RR, rr
Explanation:
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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I have 345 mL of a 1.5 M NaCl solution, if I boil the water until the volume of the solution is 250 mL what will the molarity of the solution be? Round to the nearest whole number
Answer&Explanation:
According to dilution law concentration before dilution is equal to concentration after dilution hence;;
Volume×molarity(before)=volume×molarty(after)
345ml×1.5M=?M×250ml
Cross multiplication
Molarity will be equal to 2.07M
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.