Answer:
Explanation:
Molecular reaction
Zn + Cu( NO₃ )₂ = Zn( NO₃ )₂ + Cu
Complete reaction
Zn + Cu⁺² + 2 NO₃⁻ = 2 Zn⁺² + 2 NO₃⁻ + Cu
net ionic reaction
Zn + Cu⁺² = Zn⁺² + Cu
6. A gas occupies a volume of 125.0 mL at 10.0C. At what temperature would the volume be 50.0 mL?
Answer:
V1= 125.0mL 125.0mL/10.0C=50.0mL/T2
T1= 10.0C T2=(125.0mL/10.0C) X 50.0mL
V2= 50.0mL T2= 625L
T2=?
Explanation:
I'm pretty sure about this It took me a while to get it but I already took the test
Which is a product of nuclear fusion?
A a nucleus that has a greater mass number than the starting materials
B two nuclei that are roughly half the mass of the starting materials
C a nucleus that has the same atomic number as the starting materials
D two nuclei that have greater atomic numbers than the starting materials
Answer:
A. a nucleus that has a greater mass number than the starting materials
Explanation:
The statement is "a nucleus that has a greater mass number than the starting materials."
What is nuclear fusion?Nuclear fusion occurs when two or more atomic nuclei unite to generate one or more new atomic nuclei and subatomic particles.
Two light nuclei fuse to form a single heavy nucleus in a fusion reaction. Because the overall mass of the resulting single nucleus is smaller than the mass of the two initial nuclei, the process releases energy.
Hence, the correct option is A
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how many electrons are in as3-
When you say that
something is hard to lift, are you talking about
weight or mass?
Answer:
Weight
Explanation:
WHen talking about weight you’re referring to the force exerted to lift if, but when you’re talking about mass it’s just how much it weighs but not how much it takes to lift it.
HELP ASAP PLEASE :)))
When working with a gas, it is important to know its?
A. volume, shape, mass
B. temperature, pressure, volume
C. pressure and mass
D. temperature, pressure, mass
A student completed the lab but found that the total amount of material recovered weighed more than the original sample. What is the error?
Answer:
Throughout the description section elsewhere here, the interpretation as per the particular circumstance is defined.
Explanation:
Sources of error become basically factors of measurement uncertainty. If the cumulative volume of retrieved material weighed almost as much as the initial sample, and therefore procedural cause of error is still much most probable.Lost compound will be:
= [tex]454-122[/tex]
= [tex]332[/tex]
Percentage of the lost compound will be:
= [tex]\frac{332}{454}\times 100[/tex]
= [tex]73.13 \ percent[/tex]
What is the mass number of an atom with 17 protons, 17 electrons,and 18 nuetrons?
Answer:
35
Explanation:
the formula is: mass number = protons + neutrons
so 17+18=35
At what pressure would a 0.175 mole sample of gas at 22.0°C have a volume of 2175
mL?
Answer:
[tex]P=1.95atm[/tex]
Explanation:
Hello!
In this case, since we are asked to compute the pressure of 0.175 moles of the given gas at 22.0 °C occupying a volume of 2175 mL, we can use the ideal gas equation as shown below:
[tex]PV=nRT[/tex]
Whereas our unknown is P and we solve for it as shown below:
[tex]P=\frac{nRT}{V}\\ \\P=\frac{0.175mol*0.082\frac{atm*L}{mol*K}*(22.0+273.15)K}{2175mL*\frac{1L}{1000mL} }\\ \\P=1.95atm[/tex]
Take into account that based on the given R units, the temperature must be in Kelvins and the volume in liters.
Best regards!
f a gas has an initial volume of 10L at a temperature of 350K and it is then heated to 680K, what is the new volume?
Answer:
V1 = 10 L
V2 = x L
T1 = 350 K
T2 = 680 K
And you are looking for the second Volume
the image shows the work and the answer is going to be 19.4 L or just 19 L
Hence, 19.4 L is the new volume of gas when the initial volume of 10L at a temperature of 350K and is then heated to 680K.
What is the ideal gas equation?The ideal gas law (PV = nRT) relates the macroscopic properties of ideal gases.
An ideal gas is a gas in which the particles (a) do not attract or repel one another and (b) take up no space (have no volume).
Given data:
[tex]V_1[/tex] = 10 L
[tex]V_2[/tex] =?
[tex]T_1[/tex] = 350 K
[tex]T_2[/tex]= 680 K
Now using equation:
[tex]\frac{V_1}{T_1} = \frac{V_2}{T_2}[/tex]
[tex]\frac{10 L}{350 K} = \frac{V_2}{680 K}\\[/tex]
[tex]V_2[/tex] = 19.4 L
Hence, 19.4 L is the new volume of gas when the initial volume of 10L at a temperature of 350K and is then heated to 680K.
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1. Fog is an example of aerosols true or false
Answer:
true?
Explanation:
Bornite is which type of ore?
O iron ore
O bauxite ore
Ouraninite ore
O copper ore
Answer:
O copper ore
Explanation:
Answer:
a rock that contains enough of a metal to be worthwhile to extract
Explanation:
A 3.458 g sample of KHP, a monoprotic acid, requires 45.71 mL of a KOH solution to reach the endpoint. What is the concentration of the KOH solution
Answer:
0.3704M is the concentration of KOH
Explanation:
The reaction of the monoprotic acid, KHP, with KOH is:
KHP + KOH → H₂O + K₂P
An acid reacts with a base to produce water and a salt
The molar mass of KHP is 204.22g/mol, that means in 3.458g of KHP you have:
3.458g * (1mol / 204.22g) = 0.01693 moles KHP.
At the endpoint:
Moles KHP = Moles KOH. That means moles KOH Are 0.01693 moles. These moles are in 45.71mL = 0.04571L, the molar concentration is:
0.01693 moles KOH / 0.04571L =
0.3704M is the concentration of KOHThe concentration of the KOH solution needed for the reaction is 0.370 M.
We'll begin by calculating the number of mole in 3.458 g of KHP. This can be obtained as follow:
NOTE:KHP => Potassium hydrogen phthalate
Mass of KHP = 3.458 g
Molar mass of KHP = 204.22 g/mol
Mole of KHP =?Mole = mass / molar mass
Mole of KHP = 3.458 / 204.22
Mole of KHP = 0.0169 mole Next, we shall determine the number of mole of KOH needed to react with 0.0169 mole of KHP. This can be obtained as follow:KHP + KOH → H₂O + K₂P
From the balanced equation above,
1 mole of KHP reacted with 1 mole of KOH.
Therefore,
0.0169 mole of KHP will also react with 0.0169 mole of KOH to the end point.
Finally, we shall determine concentration of the KOH solution. This can be obtained as follow:Mole of KOH = 0.0169 mole
Volume = 45.71 mL = 45.71 / 1000 = 0.04571 L
Concentration of KOH =?Concentration = mole / Volume
Concentration of KOH = 0.0169 / 0.04571
Concentration of KOH = 0.370 MTherefore, the concentration of the KOH solution needed for the reaction is 0.370 M
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Please solve the Problems below and round to the correct sig figs:
1. 0.961 - 0.07
2. 0.961 - 0.0700
3. 540.0 X 2.02
4. 540 x 2.02
Answer:
1. 0.891
2. 0.891
3. 1,090.8
4. 1,090.8
Explanation:
The inertia of a bowling ball is the inertia of a golf ball.
less than
equal to
greater than
The inertia of a bowling ball is greater than the inertia of a golf ball.
Further explanationIn Newton's first law, it is stated that if the resultant force acts on an object of magnitude is zero, it can be formulated:
[tex]\large{\boxed{\bold{\sum F=0}}[/tex]
then the object tends to defend itself from its state.
or can be stated:
An object at rest stays at rest and an object in motion stays in motion unless acted upon by an unbalanced force.
So for objects in a state of movement, objects tend to move forever. Likewise, for objects in a state of rest, they tend to remain forever. The tendency of objects like this is called inertia
The size of inertia is proportional to mass, the greater the mass of the object, the greater the inertia of the object.
Objects that have more mass will have more ability to maintain their state
So a larger bowling ball mass will have greater inertia than a golf ball
Answer:
greater than
Explanation:
I did this assignment
time equals distance divided by
Compare the density of nitrogen gas to the density of argon gas when both gases are at 298 K and 101.3 kPa.
Answer:
Ar = 1.63g/L; N₂ = 1.14g/L. The density of Argon is higher than density of nitrogen because molar mass of argon > Molar mass nitrogen
Explanation:
It is possible to obtain the density of a gas using the formula:
ρ = PM / RT
Where ρ is density in g/L
P is pressure of the gas (101.3kPa)
M is molar mass of the gas (Ar: 39.9g/mol; N₂: 28g/mol)
R is gas constant (8.314kPaL/Kmol)
And T is temperature (298K)
Thus, density of Ar and N₂ is:
Ar = 101.3kPa*39.9g/mol / 8.314kPaL/Kmol*298K
Ar = 1.63g/L
N₂ = 101.3kPa*28g/mol / 8.314kPaL/Kmol*298K
N₂ = 1.14g/L
As general rule, under the same conditions, the gas with the higher molar mass will be the gas with higher density.
The argon gas will have greater density when compared to nitrogen gas in the given condition.
The given parameters;
temperature of the gases, T = 298 Kpressure of the gases, P = 101.3 kPaThe ideal gas law can be used to determine the density of the gases;
[tex]PV = nRT\\\\PV = \frac{m}{M} RT\\\\PM = \frac{m}{V} RT\\\\PM = \rho RT\\\\\rho = \frac{PM}{RT}[/tex]
where;
M is the molar mass of the gasesR is ideal gas constantThe molar mass of nitrogen gas is given as;
M = 14 g/mol
The molar mass of argon gas is given as;
M = 40 g/mol
From the formula given above, we can conclude that the gas with greater molar mass will have greater density, in this case the argon gas will have greater density when compared to nitrogen gas in the same condition.
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Are the cells in your body right now the same exact cells you was born with true or false
Answer:
False
Explanation:
Cells are constantly dying and being reproduced.
Answer:
False.
Explanation:
Your cells are in a constant state of dieing and being replaced by new cells. As a result, very few of the cells in your body now are the exact same cells that you had 20 years ago. Your cells are constantly dying, but they're being replaced with new, fresh cells. ... The average age of a cell is 7 years… but that doesn't mean that every cell is replaced in 7 years. Some cells, in fact, never get replaced at all, remaining with us from birth until death.
i have to turn in this for a test tomorrow!!! i really need it by tomorrow this question is 60 points :) and if you answer it i’m gonna like all of you questions you have answered! p.s click the picture to see it all of the questions are there
Answer:
2. chloroplast
3. cell wall
4. vacuole
5. mitochondrion
6. nucleus
7. lysosome
8. cytoplasm
Explanation:
5 measures in keeping the salon clean and in a safe state
Answer:
Measures in Keeping the Salon Clean and Safe1. All beauty salons must be well-lighted and well-ventilated and must be in good sanitary condition.
2. The salon premises must be free from rodents, vermin, flies or other similar insects.
3. All salon establishments must be provided with continuous running hot and cold water.
4. The curtains and floor coverings in the salon must be washable and kept clean.
5. All hair, used cotton or other waste materials must be removed from the floor immediately, and deposited in a closed container. Get rid of them from the salon premises at frequent intervals.
6. The rest rooms must be well-sanitized and be provided with individual towels.
7. Each beautician must wear a washable uniform while working on clients.
The salon is a place meant for the treatment of hair. Measures have to be taken to ensure that it is kept clean and safe at all times.
The measures that have to be taken in keeping the salon clean and safe are:
The floor must be swept clean at all timesEquipment used must be clean and sterilizedHairdressers and beauticians must wash their hands always before attending to peopleProper ventilation must be maintained at all timesAntiseptic should be used on any wounded skinLearn more here: https://brainly.com/question/18718321
Li2SO4 can u break it up pls
g It turns out that (5) 157Gd really, really, REALLY likes capturing a neutron, emitting a gamma. Write the reaction (A a
Answer:
157 64 Gd + 1 0 n -----> 158 64 Gd + γ
Explanation:
In a nuclear reaction, both mass and charge are conserved. If we look at the equation above, we will notice that this principle was followed.
Gama rays has no mass and charge because it is an electromagnetic wave. The relative atomic mass of the isotope of Gd formed in the reaction is 158 Gd. The atomic number remains the same.
Convection is transferring thermal energy by
electromagnetic waves
touching/ physical contact
circulation of fluids
none of the above
WHICH IS CORRECT
Answer:
Circulation of fluids
Explanation:
Convection is transferring thermal energy by circulation of fluids
Convection is heat transfer by the movement of currents within a fluid. During convection, heated particles of fluid begin to flow. When a liquid or gas is heated, the particles move faster and spread apart. As a result, the particles of the heated fluid occupy more space.
Determine the mass of 7.20 moles of iron??
Answer:
[tex]m_{Fe}=4.02x10^{2}gFe[/tex]
Explanation:
Hello!
In this case, since the mole-mass relationships allows us to compute the moles or mass of a sample given the mass or moles via the atomic (elements) or molar mass (compounds). For iron, whose atomic mass is 55.847 g/mol, we can compute the mass o 7.20 moles as shown below:
[tex]m_{Fe}=7.20molFe*\frac{55.847gFe}{1molFe}\\\\m_{Fe}=4.02x10^{2}gFe[/tex]
As you can see we write 1 mol Fe on bottom in order to cancel the given moles out.
Best regards!
What are tides
A. Movements of the Earths water through ocean.
B. The daily rise and fall of the Earth’s water along the shore.
C. The cycling of water through the environment.
Answer: B
Explanation:
Select the correct set of quantum numbers (n, l, ml) for the third electron removed in the formation of a cation for iron, Fe3+.
Answer:
The third electron to be removed has to be in;
n = 3
l = 2
ml = -2, -1, 0, 1, 2
Explanation:
There are four basic quantum numbers;
i) principal quantum number (n)
ii) Azimuthal, Obital or Subsidiary quantum number (l)
iii) Magnetic quantum number (ml)
iv) Spin quantum number (ms)
The electronic configuration of Fe3+ is:
1s2 2s2 2p6 3s2 3p6 3d5
The third electron to be removed has to be in;
n = 3
l = 2
ml = -2, -1, 0, 1, 2
The third electron removed in the formation of a Fe³⁺ has the quantum numbers:
n: 3l: 2ml: -2Iron has an atomic number of 26, so it has the following electron configuration:
[tex]Fe: [Ar] 4s^{2} 3d^{6}[/tex]
To form cations, it first loses the electrons from the outermost shell (4s). The electron configuration of Fe²⁺ is:
[tex]Fe^{2+} : [Ar] 4s^{0} 3d^{6}[/tex]
Then, it will lose an electron from the highest energy level (3d) to form Fe³⁺.
[tex]Fe^{3+} : [Ar] 4s^{0} 3d^{5}[/tex]
The third electron lost from Fe to form Fe³⁺ was in 3d⁶.
The principal quantum number (n) coincides with the energy level: 3.The azimuthal quantum number (l) corresponding to the sublevel d is 2.The magnetic quantum number (ml) goes from -l to +l. Once each orbital has at least 1 electron (5 electrons), the second electron goes to the orbital with ml = -2.The third electron removed in the formation of a Fe³⁺ has the quantum numbers:
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A volume of 500.0 mL500.0 mL of 0.140 M0.140 M NaOHNaOH is added to 585 mL585 mL of 0.200 M0.200 M weak acid (Ka=4.71×10−5).(Ka=4.71×10−5). What is the pHpH of the resulting buffer?
Answer:
pH = 4.50
Explanation:
A weak acid HX reacts with NaOH as follows:
HX + NaOH → H2O + NaX
Initial moles of HX are:
0.585L * (0.200mol / L) = 0.117 moles of HX
The moles of NaOH are moles of NaX that are produced, that means:
0.500L * (0.140mol / L) = 0.07 moles of NaOH = 0.070 moles of NaX produced.
And moles of HX that still in solution are:
0.117 moles - 0.070 moles = 0.047 moles of HX
To find the pH of this buffer (Mixture of a weak acid, HX with its conjugate base, NaX) we use H-H equation:
pH = pKa + log [NaX] / [HX]
Where pKa is -log Ka = 4.327
And [] could be taken as moles of each species.
Replacing:
pH = 4.327 + log [0.070] / [0.047]
pH = 4.50
is it true that a gas takes up the shape of the container
What is the function of ROM
Answer:
Read only memory (ROM) is non-volatile primary storage. It keeps its contents when the computer is turned off. ROM can be read from but not written to. ROM can be read from but not written to, hence the term read only.
Explanation:
How many grams of a 15.6% sugar solution contain 40.0 g of sugar?
Which is a chemical property of trasistion elements?
A) brightly colored
B) denser than alkali metals
C) great ductility
D) reacts little with oxygen
Answer:
Maybe D? B?
Explanation:
Sorry if I made u get it wrong