Answer:
Silver has to give up one electron.
Explanation:
Silver is a transition element and has a partially filled 4d- orbital having 9 electrons and a 5s orbital having 2 electrons in it. In order to achieve stability, silver must have completely filled d-orbital having a maximum number of 10 electrons in it.
Therefore, one electron from 5s orbital jumps to 4d orbital to make it stable. Now, 5s orbital has only one electron, and it will be easy for silver to lose this electron to attain a stable electronic configuration.
How does large change in temperature or pH affect proteins?
(a) They eliminate all of their essential amino acids
(b) They lose their acid sequence
(c) They come apart or lose their shape
(d) They change their amino acids into fatty acids
Answer:
(c) They come apart or lose their shape
Explanation:
Heat and temperature disrupt the attractions of the groups in the side chains that give the protein its characteristic shape.
(a) and (b) are wrong. The proteins do not lose their amino acids or their sequence.
(d) is wrong. The amino acids do not change into fatty acids.
which electron configuration represents the electrons in an atom of sodium in the ground state at STP
Final answer:
The ground state electron configuration for an atom of sodium at STP is 1s²2s²2p⁶3s¹, or in noble gas shorthand notation, [Ne] 3s¹.
Explanation:
The electron configuration of an atom of sodium (Na) in the ground state at standard temperature and pressure (STP) is represented by 1s²2s²2p⁶3s¹. This notation indicates that sodium has two electrons in the 1s orbital, two electrons in the 2s orbital, six electrons in the 2p orbital, and one valence electron in the 3s orbital. In noble gas configuration, this is abbreviated as [Ne] 3s¹, where [Ne] signifies the electron configuration of neon, the noble gas preceding sodium on the periodic table, and the 3s¹ represents the one valence electron in the third shell.
The ground state electron configuration for an atom of sodium at STP is 1s²2s²2p⁶3s¹, which can also be represented using noble gas notation as [Ne] 3s¹.
Explanation:The electron configuration that represents the electrons in an atom of sodium in the ground state at STP is 1s²2s²2p⁶3s¹. This configuration indicates that sodium has two electrons in the first shell (1s), eight electrons filling the second shell (2s and 2p), and one valence electron in the third shell (3s). To represent this configuration using the noble gas notation, we use the symbol [Ne], which stands for the electron configuration of neon, the noble gas that precedes sodium on the periodic table. Thus, the noble gas configuration for sodium is [Ne] 3s¹.
Given [H3O+] = 1.00 x 10-7M
Is this acidic, basic or neutral?
How do you know?
Answer:
This solution is neutral.
Assumption: the solution is under room temperature, such that [tex]K_w = 10^{-14}[/tex].
Explanation:
For a solution in water,
[tex]\mathrm{[H_3O^{+}] \cdot [OH^{-}]} = \mathnormal{K_w}[/tex].
In other words, if [tex]K_w[/tex] is given, knowing the concentration (in [tex]\rm M[/tex], or equivalently [tex]\rm mol\cdot L^{-1}[/tex]) of either [tex]\rm H_3O^{+}[/tex] or [tex]\rm OH^{-}[/tex] will imply the concentration of the other ion.
Under room temperature,
[tex]K_w \approx 10^{-14}[/tex].
The question states that for this solution,
[tex]\mathrm{[H_3O^{+}]} = \rm 1.00\times 10^{-7}\; M[/tex]
As a result, the concentration of [tex]\rm OH^{-}[/tex] in this solution will be
[tex]\displaystyle \frac{K_w}{\mathrm{[H_3O^{+}]}} = \frac{10^{-14}}{1.00\times 10^{-7}} = 10^{-7}[/tex].
A solution is acidic if [tex]\mathrm{[H_3O^{+}] > [OH^{-}]}[/tex].A solution is basic if [tex]\mathrm{[H_3O^{+}] < [OH^{-}]}[/tex].A solution is neutral if [tex]\mathrm{[H_3O^{+}] = [OH^{-}]}[/tex].In this case, [tex]\rm [H_3O^{+}] = 10^{-7}\; M = [OH^{-}][/tex]. In other words, this solution is neutral.
Which of the following describes a compound? (Hint: Carbon and oxygen bo
A.
a piece of pure carbon, containing only carbon atoms
B.
oxygen gas surrounding a solid piece of carbon
c.
a substance made of two oxygen atoms for each carbon atom
carbon and oxygen atoms mixed without being bonded together
A compound is a substance formed when two or more different elements bond together chemically. In the options provided, 'a substance made of two oxygen atoms for each carbon atom' describes a compound, specifically carbon dioxide (CO2).
Explanation:In chemistry, a compound is a substance formed when two or more different elements are bonded together. For the options provided in your question, the choice 'a substance made of two oxygen atoms for each carbon atom' most accurately describes a compound. This describes the compound carbon dioxide (CO2), where each molecule includes one carbon atom bonded to two oxygen atoms. Remember, a substance that consists of two or more elements that are chemically combined is regarded as a compound.
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what is the binding energy of a nucleus that has a mass defect of 5.81*10-^29 kg
A 5.23*10-^12 J
B 3.15* 10^12 J
C 1.57*10-3 J
D 9.44*10^20 J
Answer:
Choice A: Approximately [tex]5.23 \times 10^{-29}[/tex] joules.
Explanation:
Apply the famous mass-energy equivalence equation to find the energy that correspond to the [tex]\rm 5.81\times 10^{-29}[/tex] kilograms of mass.
[tex]E = m \cdot c^{2}[/tex],
where
[tex]E[/tex] stands for energy, [tex]m[/tex] stands for mass, and[tex]c[/tex] is the speed of light in vacuum.The speed of light in vacuum is a constant. However, finding the right units for this value can simplify the calculations a lot. What should be the unit of [tex]c[/tex]?
The mass given is in the appropriate SI unit:
Mass is in kilograms.
Thus, proceed with the speed of light in SI units. The SI unit for speed is meters per second. For the speed of light, [tex]c \approx \rm 3.00\times 10^{8}\;m\cdot s^{-1}[/tex].
Apply the mass-energy equivalence:
[tex]\begin{aligned} E &= m \cdot c^{2} \\ &= \rm 5.81\times 10^{-29}\; kg \times {\left(3.00\times 10^{8}\; m\cdot s^{-1}\right)}^{2}\\ &\approx \rm 5.23\times 10^{-12}\;kg\cdot m^{2}\cdot s^{-2} \end{aligned}[/tex].
The unit of energy is not in joules. Don't be alerted. Consider the definition of a joule of energy. One joule is the work done on an object when a force of one newton acts on the object in the direction of the force through the distance of one meter. (English Wikipedia.)
[tex]\rm 1\; J = 1\; N \times 1\; m[/tex].
However, a force of one newton is defined as the force required to accelerated an object with a mass of one kilogram (not gram) at a rate of one meter per second squared. (English Wikipedia.)
[tex]\begin{aligned}\rm 1\; J &= \rm 1\; N \times 1\; m\\ & = \rm \left(1\; kg\times 1\; m\cdot s^{-2}\right)\times 1\; m\\ &= \rm 1\; kg \cdot m^{2}\cdot s^{-2}\end{aligned}[/tex].
In other words, the mass defect here is also [tex]\rm 5.23\times 10^{-12}\; J[/tex].
Answer: 5.23*10^-12 j
Explanation:
An industrial chemist is studying a sample of an
unknown metal. Describe two ways he could
change the metal physically and two ways he could change the metal chemically to try to identify
ANSWER!!!
Heat the metal until it melts (physical change).
Attempt to react the metal with oxygen (chemical change).
Stretch the metal into a wire (physical change).
Attempt to react the metal with acid (chemical change).
Answer:
the above
Explanation:
heat the metal until it melts
react it with o2
stretch it
react it with acid
Answer:alloy
Explanation:
He can use alloy to change the metal.An alloy is the mixture of two or more metal.
2Cu(NO3)2=2CuO+4NO2+O2
What would you observe when copper(II) nitrate is heated?
Upon heating copper(II) nitrate, black-colored copper(II) oxide forms as a solid residue; brown fumes of nitrogen dioxide are released, and oxygen gas is also evolved.
When copper(II) nitrate is heated, you would observe the compound decomposing into copper(II) oxide (CuO), nitrogen dioxide (NO₂), and oxygen (O₂). Copper(II) oxide is a solid with a black color and would be visible as a residue. Nitrogen dioxide is a gas with a characteristic brown color, which would be noticeable as brown fumes evolving from the reaction mixture.
Additionally, you might see the release of oxygen gas, though it is colorless and would not be visibly noticeable without testing for its presence (such as by introducing a glowing splint, which would re-ignite in the presence of oxygen).
If a reactant was removed, did the new equilibrium system shift to make more reactants or more products?
Answer:
The new equilibrium system shift to make more reactants.
Explanation:
Le Châtelier's principle states that when there is an dynamic equilibrium, and this equilibrium is disturbed by an external factor, the equilibrium will be shifted in the direction that can cancel the effect of the external factor to reattain the equilibrium.Removing reactant:
Removing reactant will decrease the concentration of the reactants side, so the reaction will be shifted to the left side to suppress the decrease in the concentration of reactants.so, removing some of the reactants will shift the system to make more reactants.
What happens in a reaction if it is at chemical equilibrium?
a.there are no reactants in the system.
b. all of the products are used up.
c. the amount of the reactant is constantly decreasing.
d. the rate of the forward reaction equals the rate of the reverse reaction.
Answer: The answer is D
Explanation:
In a chemical equilibrium, the forward and reverse reactions occur at equal rates, and the concentrations of products and reactants remain constant. A catalyst speeds up the rate of a chemical reaction, but has no effect upon the equilibrium position for that reaction.
In a chemical reaction at equilibrium, the rate of the forward reaction equals the rate of the reverse reaction. This results in constant concentrations of the reactants and products, even though individual molecules continue to react.
Explanation:The question is dealing with the concept of chemical equilibrium in chemistry. First, let's understand that this condition refers to a state where the concentrations of the reactants and products remain constant over time. Specifically, the correct option is 'd'. the rate of the forward reaction equals the rate of the reverse reaction'. This means that for a reaction at equilibrium, while there may still be reactants and products present, and reactions are still happening, they are occurring at the same rate in both directions. Therefore, there is no net change in the concentrations of the reactants or products, even though individual molecules are continually reacting. This does not mean that there are no reactants left in the system (a), all the products are getting used up (b), or that the amount of the reactant is constantly decreasing (c). It strictly implies that the forward and reverse reactions have the same rate.
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How many liters of oxygen gas, at standard temperature and pressure, will react with 35.8 grams of iron metal? 4 Fe (s) + 3 O2 (g) 2 Fe2O3 (s)
Answer:
Depending on the definition of "standard" conditions, the volume of O₂ required here will be either
43.1 L if the STP volume is 22.4 L/mol, or43.7 L if the STP volume is 22.7 L/mol.Explanation:
Relative atomic mass data from a modern periodic table:
Fe: 55.845.How many moles of iron Fe in that 35.8 gram of iron metal?
[tex]M(\mathrm{Fe}) = \rm 55.845\; g\cdot mol^{-1}[/tex].
[tex]\displaystyle n = \frac{m}{M} = \rm \frac{35.8\; g}{55.845\; g\cdot mol^{-1}} = 0.641060\; mol[/tex].
How many moles of oxygen gas will be required?
Consider the ratio between the coefficient of Fe and that of [tex]\mathrm{O_2}[/tex] in the equation:
[tex]\displaystyle \frac{n(\mathrm{O_2})}{n(\mathrm{Fe})} = \frac{3}{1} = 3[/tex].
As a result,
[tex]\displaystyle n(\mathrm{O_2}) = n(\mathrm{Fe}) \cdot \frac{n(\mathrm{O_2})}{n(\mathrm{Fe})} = \rm 0.641060\; mol \times 3 = 1.92318\; mol[/tex].
What's the volume of that [tex]\rm 1.92318\; mol[/tex] of oxygen gas under STP?
One mole of an ideal gas occupies a volume 22.4 Liters under STP (or 22.7 liters in certain textbooks.) The volume of an ideal gas is directly related to the number of moles of particles in this gas. Assume that oxygen acts like an ideal gas under STP. As a result, 1.92318 moles of oxygen will occupy a volume of either
[tex]\rm 1.92318\; mol \times 22.4\; L\cdot mol^{-1} = 43.1\; L[/tex] or
[tex]\rm 1.92318\; mol \times 22.7\; L\cdot mol^{-1} = 43.7\; L[/tex].
how much energy is required to vaporize 2 kg of copper?
A 4730 kj
B 207kj
C 9460 kj
D 414kj
The Answer is 9460 kJ (C)
The other answer is cap
Determine the empirical formula for succinic acid that is composed of 40.60% carbon, 5.18% hydrogen, and 54.22% oxygen.
Answer:
C₂H₂O₃
Explanation:
The empirical formula of a compound is derived bu finding the whole ratios of the constituent elements.
In succinic acid, the ratios of carbon to hydrogen to oxygen is calculated as follows:
% mass
Carbon- 40.60
Hydrogen - 5.18
Oxygen - 54.22
RAM
Carbon -12
Oxygen - 15.994
Hydrogen -1.008
No of moles elements in the compound
Carbon = 40.60/12=3.3833
Oxygen = 54.22/15.994= 3.39
Hydrogen= 5.18/1.008 = 5.1389
Mole ratios of the individual elements we divide by the smallest value of the number of moles.
Carbon: Hydrogen : Oxygen
3.3833/3.3833:3.39/3.3833:5.1389/3.3833
=1:1:1.5
We can multiply the value by 2 to get the whole number ratio.
=2:2:3
The empirical formula will be:
C₂H₂O₃
A distance of 2 kilometers is equal
Answer:
1.24274 miles; 3.2186818249471 kilometer; 3218.6818249471002673 meters; 321868.18249471002491 centimeters; 3218681.8249471001327 millimeters; 3218681824.9471006393 micrometers; 3218681824947.1000977 nanometers; 2.18722240048120917 yards; 6.56166720144 feet; 7.87400064173235 inches; 1.079911535 nautical mile.
Answer:
2000 meters
Explanation:
because 2 kilometers equals 2000 meters
What is the molar mass of Na2SO4?
Answer:
142 g / mol
Explanation:
Molar mass of Na=23
S=32
O=16
Total Molar mass: 23*2+32+16*4
=142g / mol
A student completes a titration by adding 12.0 milliliters of NaOH(aq) of unknown concentration to 16.0 milliliters of 0.15 M HCl(aq). What is the molar concentration of the NaOH(aq)?
1)5.0 M
2)0.20 M
3)0.11 M
4)1.1 M
12×C(NaOH)=16×0.15
C(NaOH)=(16×0.15)÷12=0.2
Answer: 2) 0.20M
The pH of a solution is measured as 5.9. What is the hydrogen ion concentration of the solution?
A solution with a pH of 5.9 has a hydrogen ion concentration of approximately 1.26 x 10^-6 M. The pH scale is inversely related to hydrogen ion concentration - lower pH values correlate with higher hydrogen ion concentrations.
Explanation:The pH of a solution is directly related to its hydrogen ion concentration ([H+]). Since pH is the negative base-10 logarithm of the [H+], a solution with a pH of 5.9 will have a hydrogen ion concentration of 10^-5.9 M (Molar), or approximately 1.26 x 10^-6 M. This is because each unit decrease in pH value results in a ten-fold increase in [H+], so a lower pH would mean a higher [H+]. Similarly, a higher pH indicates a lower hydrogen ion concentration as the solution becomes more basic or alkaline.
It's worth mentioning that a pH value of 7 is considered neutral, such as in pure water. Values below 7 are acidic (greater concentration of [H+]) and values above 7 are basic or alkaline (lesser concentration of [H+]).
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A person is standing on the steps at the shallow end of the pool. What wave property explains why his/her feet appear closer to the surface then they really are? reflection interference diffraction refraction
Answer:
Diffraction
Explanation:
When light enters water at an angle, it is bent downward by diffraction. However, our brain sees the underwater image as if it were on a straight line.
Thus, the bottom of the pool appears to be shallower than it actually is.
A is wrong. If all the light were reflected from the surface, we wouldn't be able to see the person's feet.
B is wrong. if all the light rays interfered with each other, we wouldn't be able to see anything.
D is wrong. Refraction is the bending of light as it passes the edge of an object.
Answer:
refraction
Explanation:
Identify the Lewis acid in this balanced equation:
Ag+ + 2NH3 -> Ag(NH3)2+
A. Ag+
B. NH3
C. Ag(NH3)2+
Lewis acid is a chemical species that is able to accept an electron pair. In this case the silver ion Ag[tex]^{+}[/tex] is a lewis acid because it accepts a lone pair electrons form the ammonia :NH[tex]_{3}[/tex]
Answer:
Your answer is Ag+ have a good day
Explanation:
What is the compound name for the formula [Ru(en)2Cl2]2+ and [Co(en)Cl2Br]-
Answer:2C12
Explanation:because if u divide the the equation by 2 u well get the same answer you can multiply but that will take longer with the invisible zeros and stuff like that but the answer is 2c12 and on the real FSA u can pull out ur phone and cheat just make sure the teacher is not watching just playing with you DONT DO THAT YOU WILL GET IN SERIOUS TROBLE KIDS DO NOT DO THIS KN THE REAL DAY OF THE FSA PLEASE DONT DO IT YOU WILL GET IN SERIOUS TROUBLE WELL THATS IT FOR TODAY SO HAVE A GREAT DAY THIS IS TO PUT PRESSURE ON YOU
part of molten rock at mid-ocean ridges
Answer:
Magma
Explanation:
Magma is part of molten rock at mid-ocean ridges.
Hope this helps!
A gas has an empirical formula CH4. 0.16g of the gas occupies a volume of 240cm^3 What is the molecular formula of the gas???.
Help me anyone who know!!!
Explanation and answer:
The molar volume of a gas is 22.4 L at 0 deg. C.
So the molar mass of the gas is, by proportion,
0.16 g * (22400 mL)/(240 mL) = 14.93 g
The molar mass of (CH4)n = 12+4(1) = 16.
So n = 15.93/16 = 1, or the molecular formula is CH4.
Note: The temperature at which the volume was observed was not given. If 240 cm^3 was observed at 20 deg.C, then the volume at 0 deg.C would be
V=240*(273+0)/(273+20) = 223.6
The molar mass = 0.16*22400/(223.6) = 16.03
which gives n = 16/16.03 = 1 again, but more accurately.
Which of the following will cause an increase in the acceleration of an object? increase force decrease force increase mass decrease mass
Answer:
Mass and distance affect the gravitational attraction between objects.
Explanation:
Answer:
Its Mass
Explanation:
nitrogen us a component of all
Answer:
amino acids and urea
Explanation:
Amino acids are the building blocks of all proteins. Proteins comprise not only structural components such as muscle, tissue and organs, but also enzymes and hormones essential for the functioning of all living things. Urea is a byproduct of protein digestion.
How many grams of oxygen gas are contained in a 15 L sample at 1.02 atm and 28oC?
Answer:
[tex]\boxed{\text{20 g}}[/tex]
Explanation:
We can use the Ideal Gas Law to solve this problem
pV = nRT
Data:
p = 1.02 atm
V = 15 L
T = 28 °C
Calculations:
(a) Convert temperature to kelvins
T = (28 + 273.15) K = 301.15 K
(b) Calculate the number of moles
[tex]\text{1.02 atm} \times\text{15 L} = n \times \text{0.082 06 L}\cdot\text{atm}\cdot\text{K}^{-1}\text{mol}^{-1}\times \text{301.15 K}\\\\15.3 = n \times \text{24.71 mol}^{-1}\\\\n = \dfrac{15.3}{\text{24.71 mol}^{-1}} = \text{0.619 mol}[/tex]
(c) Calculate the mass
[tex]\text{Molar mass} = \dfrac{\text{mass}}{\text{moles}}\\\\M = \dfrac{m}{n}\\\\\text{32.00 g}\cdot \text{mol}^{-1} = \dfrac{m}{\text{0.619 mol}}\\\\m = 32.00 \times 0.619 \text{ g} = \textbf{20 g}\\\\\text{The mass of oxygen is } \boxed{\textbf{20 g}}[/tex]
Is the concentration of 25 cm3 solution same as 250 cm3 solution?
Answer:
it can be
Explanation:
because the concentration of a solution will not affect the volume of it
3. Describe a possible danger that can occur if you put food, soda, coffee, pencil erasers, etc. in your mouth while conducting your chemistry experiments.
Answer:
It is possible for the object/food to have been infected/contaminated
Explanation:
If you where to be eating while doing chemistry, it is possible that some of the things you are experimenting with might have gotten on some of the things around, or come off your hands onto the thing.
Answer:
While performing chemistry experiments one should not eat food while performing the experiments as harmful chemicals can be ingested into mouth along with the food.
There are various types of chemical and substances present in lab which might be harmful for person performing experiment.
One can also get disturbed and might spill chemicals on himself which can be harmful.
Which contains more soda a 2 liter bottle or a 2 quart bottle
Answer:
the 2 liter contains more soda
why does stirring increase the speed of a solute dissolving in water
Answer:
When you stir a solute, more surface area of the substance is exposed to the solvent.
Explanation:
The higher the surface area in relation to volume is, the faster a solute will dissolve.
Hope it helps
Answer:
Try it and see. My guess is that stirring would increase the rate of dissolution.
Explanation:
So get 2 beakers, fil them up with 10 g salt, and add 100 mL water. Put a magnetic follower in one of the beakers, place it on a stirrer and let it rip. Measure the time, and see if the unstirred beaker still has solute on the bottom.
How much heat is released when 15.0 g of water vapor is condensed and then cooled from 100.0 C to -32.0 C?
Show work please ❤️
Answer:
46.85kJ
Explanation:
The specific latent heat of vaporization of water is =2.3 x 10⁶ J kg-1.
The specific heat capacity of water = 4.2×10³J/kgK
The latent heat of fusion of water= 3.36×10⁵ J/kg
The specific heat capacity of ice=2.108×10³ J/kgK
The heat of lost due to cooling of ice is calculated as follows by adding the heat lost during condensation of water vapor to the heat lost during cooling the water to freezing point plus the heat lost during freezing plus the heat lost during cooling the ice to -32.0°C
=MLv+MCΔT(water)+MLf+MCΔT(ice) where Lv=latent heat of vaporization of water , and Lf is the latent heat of fusion ice.
=(0.015kg×2.3 x 10⁶ J/kg)+(0.015kg×4.2×10³J/kgK×100K)+(0.015kg×3.36×10⁵ J/kg)+(0.015kg× 2.108×10³ J/kgK)×32K
=34500J+6300J+5040J+1011.84J
=46851.84J
=46.85kJ
Which of the following gases is the best choice for inflating a balloon that must remain inflated for a long period of time?
hydrogen
argon
neon
oxygen
Answer:
argon
Explanation:
argon inhibits evaporation, and prevents corrosion
Argon is the best gas to use for inflating a balloon that must remain inflated for a long period of time because it doesn't escape from the balloon as quickly as hydrogen or helium and it is safer compared to oxygen and hydrogen.
Explanation:Of the gases listed, argon is the best choice for inflating a balloon that needs to stay inflated for a long period of time. Helium is commonly used for inflating balloons because it is light and can make the balloon float, but it also diffuses through the balloon material quite fast causing the balloon to deflate over time. Argon, a noble gas, does not readily react with other substances and is heavier than air, thus it doesn't escape from balloon as quickly as helium or hydrogen, causing the balloon to remain inflated for longer. Oxygen, is not a feasible choice due to its reactive nature. Finally, Hydrogen is lighter than air, but it is highly flammable and when mixed with even a little oxygen, can become explosive.
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