Answer:
Try to go to quizzlet
Explanation:
Answer:
j
Explanation:
What mass of N2 will be needed to produce 31.5 grams of N2O5?
4N2 + 502 --> 2N2O5
a) 158.3 grams
b) 38.64 grams
c) 4.96 grams
d) 16.34 grams
Answer: d) 16.34 grams
Explanation:
To calculate the moles :
[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]
[tex]\text{Moles of} N_2O_5=\frac{31.5g}{108.01g/mol}=0.292moles[/tex]
[tex]4N_2+5O_2\rightarrow 2N_2O_5[/tex]
According to stoichiometry :
As 2 moles of [tex]N_2O_5[/tex] are produced by= 4 moles of [tex]N_2[/tex]
Thus 0.292 moles of [tex]N_2O_5[/tex] are produced by= =[tex]\frac{4}{2}\times 0.292=0.584moles[/tex] of [tex]N_2[/tex]
Mass of [tex]N_2=moles\times {\text {Molar mass}}=0.584moles\times 28g/mol=16.34g[/tex]
Thus 16.34 g of [tex]N_2[/tex] will be needed
Which of Earth’s spheres do humans impact and how?
You will get a free foot if you answer this
Answer:
humans have a huge impact on all spheres. if you negatively impact the spheres, such as burning fossil fuels, it'll pollute the atmosphere.
Explanation:
All four spheres of Earth are susceptible to human influence. Burning fossil fuels can cause pollution to be released into the atmosphere. Garbage accumulated by humans in landfills has an impact on the geosphere. Human waste enters waterways and has an effect on the hydrosphere.
What is geosphere ?Different definitions of the geosphere have conflicting uses. It can be used to refer to the atmosphere, lithosphere, hydrosphere, and cryosphere as a whole. Different mass and/or energy flows can be exchanged between the various geosphere collectives.
Land erosion and soil movement currently result from human activity more frequently than from any natural mechanism. Human-caused air and water pollution has a negative impact on the environment, rivers, and lakes, harming both other animals and people's health.
According to some scientists, humans have their own sphere, the "anthrosphere." But for the purposes of this module, people will also be considered a component of the biosphere.
Thus, Garbage accumulated by humans in landfills has an impact on the geosphere.
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What makes a solution saturated?
Answer:
maximum amount of solute that is capable of being dissolved
Answer: A solution that contains a maximum amount if solute that is capable of being dissolved
Explanation:
A saturated solution is a solution that contains the maximum amount of solute that is capable of being dissolved.
HelapPPPpPPPPpThe three states of matter that may change during a physical change are O atoms, molecules, electrons O color, shape, size O solid, liquid, gas
Answer:
Solid liquid and gas
Explanation:
The net ionic equation for the dissolution of zinc metal in aqueous hydrobromic acid is ________.
Answer:
[tex]Zn(s)+2H^+(aq)\rightarrow Zn^{2+}(aq)+H_2(g)[/tex]
Explanation:
Hello!
In this case, since writing the net ionic equation implies the complete molecular equation, we should start by:
[tex]Zn(s)+2HBr(aq)\rightarrow ZnBr_2(aq)+H_2(g)[/tex]
Next, we represent the ionization of the aqueous species:
[tex]Zn(s)+2H^+(aq)+2Br^-(aq)\rightarrow Zn^{2+}(aq)+2Br^-(aq)+H_2(g)[/tex]
Whereas the spectator ions, those at both reactants and products are cancelled out so the net ionic equation is obtained:
[tex]Zn(s)+2H^+(aq)\rightarrow Zn^{2+}(aq)+H_2(g)[/tex]
Best regards!
Calculate the pHpH of a 0.10 MM solution of HClHCl . Express your answer numerically using two decimal places.
Answer: The pH 0f 0.10 solution of HCl is 1.00
Explanation:
pH or pOH is the measure of acidity or alkalinity of a solution.
pH is calculated by taking negative logarithm of hydrogen ion concentration.
[tex]pH=-\log [H^+][/tex]
[tex]HCl\rightarrow H^++Cl^{-}[/tex]
According to stoichiometry,
1 mole of [tex]HCl[/tex] gives 1 mole of [tex]H^+[/tex]
Thus [tex]0.10[/tex] moles of [tex]HCl[/tex] gives =[tex]\frac{1}{1}\times 0.10=0.10[/tex] moles of [tex]H^+[/tex]
Putting in the values:
[tex]pH=-\log[0.10][/tex]
[tex]pH=1.00[/tex]
Thus pH 0f 0.10 solution of HCl is 1.00
What is the standard cell potential for a voltaic cell using the Pb2 /Pb and Mg2 /Mg half-reactions and which metal is the cathode
Answer:The standard cell potential, E˚cell =2.234 V, Pb metal is the cathode.
Explanation:
The Half cell reactions are
Pb2+(aq) + 2e– > Pb(s) ------E˚ = –0.136 V
Mg2+(aq) + 2e–>Mg(s)------- E˚ = –2.37 V
In a voltaic cell, reduction occurs at the cathode and oxidation occurs at the anode
Mg(s)---->Mg2+(aq) + 2e– ( anodic oxidation)
Pb2+(aq) + 2e----> Pb(s) ( Cathodic reduction)
We can see that Mg has a more negative reduction potential value leading to having a low reduction potential and therefore will occur at the anode since it will be oxidized. On the other hand Pb2+ has a less negative reduction potential and therefore will have a high reduction making it to occur at the cathode and be reduced
Using The standard cell potential, E˚cell = E˚cathode – E˚anode
E˚cell = –0.136 - (–2.37)
E˚cell=2.234 V
Titanium dioxide and zinc oxide are two of the 16 active ingredients approved by the FDA for use in sunscreens. Which compound contains a higher percentage of oxygen by mass
Answer: [tex]TiO_2[/tex] has higher percentage of oxygen by mass.
Explanation:
To calculate the mass percent of element in a given compound, we use the formula:
[tex]\text{Mass percent of oxygen}=\frac{\text{Mass of oxygen}}{\text{mass of compound}}\times 100[/tex]
1. Mass of oxygen in [tex]TiO_2[/tex] = [tex]\frac{32g}{80g}\times 100=40\%[/tex]
2. Mass of oxygen in [tex]ZnO[/tex] = [tex]\frac{16g}{81g}\times 100=19.8\%[/tex]
Thus [tex]TiO_2[/tex] has higher percentage of oxygen by mass.
The compound with the higher percentage of oxygen by mass is titanium dioxide.
Titanium dioxide, TiO2, has a molar mass of 79.866 g/mol and O2 has a molar mass of 32.
Percentage by weight of oxygen in TiO2 = 32/79.866 x 100
= 40.07%
Zinc oxide, ZnO, has a molar mass of 81.38 g/mol
percentage by weight of oxygen in ZnO = 16/81.38 x 100
= 19.66%
Thus, titanium dioxide has a higher percentage by weight of oxygen than zinc oxide.
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Name two elements that have similar properties based on their groupings in the periodic table.
A. Li and O
B. Na and Li
C. B and Cl
D. O and Cl
Answer:
B. Na and Li
Explanation:
Only lithium and Sodium will have similar properties based on their groupings in the periodic table.
The periodic table of elements shows the arrangement of elements based on their atomic number.
As general rule, elements in the same group on the periodic table will have the same chemical propertiesThis is because they have the same number of valence electrons. Valency of an atom determines the chemical properties of such atom.A 60.0 mL sample of nitrogen is warmed from 350 K to 400 K. Find its new volume if the pressure remains constant.
0.0145 ml
52.50 ml
0.0191 ml
68.57 ml
yes
Answer:68.57
Explanation:
what is meant by votalite in chemistry
Answer: This may help you
https://ay.live/BNNBhX
Explanation:
You dissolved a small amount of your product in about 5 mL of distilled water in a test tube. You then added about 1 mL of 6M HCl solution and finally you heated the final solution. What precipitate formed in the test tube?
Answer:
Sulfur
Explanation:
The reaction of the following question is as follows:
Na₂S₂O₃ (aq) + 2HCl(aq) --------------⇒2NaCl (aq) + H₂O(l) + SO₂(aq) + S (s)
Precipitate is sulfur.
What is the relationship between KMT and Sea Level Rise?
Relationship between KMT and Sea Level Rise because sea level rise in KMT with distance of 760nm
KMT is described as the behavior of gases and also it is used to explain macroscopic properties of a gas such a pressure and temperature and sea level rise is an increase in the level of the world oceans due to the effects of global warming and burning fossil fuels is one of the causes of global warming because it releases carbon dioxide and other heat-trapped gasses into the atmosphere so here the relationship between kinetic molecular theory and sea level rise is distance between sea level and KMT is 760nm sea level is rise because gas level is is increases.
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How many protons, neutrons, and electrons does the following atom have?
Answer:
Option C 28 Proton 31 neutron 26 elecrtons
Explanation:
Answered
A student wants to measure the temperature of a solution. The student
takes 10 measurements and determines that the temperature is about 24.6 degrees celsius. If the true temperature is 24.3 degrees celsius, what is the absolute error in the measurement?
Answer:
0.3 or 0.30
Explanation:
The discrepancy between a quantity's measured or inferred value and its actual value is known as the absolute error. The absolute error is insufficient because it provides no information about the significance of the error. The absolute error is -0.3.
An important component of scientific calculations is measurement. Results from measurements that are entirely correct are incredibly unusual. Small mistakes are frequent while monitoring various metrics. Different kinds of errors result in variations in measurement. Mathematical equations can be used to express all faults.
The difference between a quantity's measured value and actual value is used to compute the absolute error. The absolute error is written as, if the measured value is x and the actual value is x₀.
∆x = x₀- x
∆x = 24.3 - 24.6
∆x = -0.3
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Can gravity be considered a force even though the objects are not in contact?
Answer:
Gravity as well as electrostatic and magnetic attraction and repulsion provide real life examples of forces being exerted by one object on another without them being in contact with each other.
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Drag the text elements below into the gray boxes to create an equation that calculates the mass of CH, required to create 24.0 g of H₂O.
The mass of CH₄ required to create 24.0 g of H₂O is 10.67 g
Balanced equationCH₄ + 2O₂ -> CO₂ + 2H₂O
The following were obtained from the balanced equation:
Molar mass of CH₄ = 12 + (1 × 4) = 16 g/mol Mass of CH₄ from the balanced equation = 1 × 16 = 16 gMolar mass of H₂O = (2 × 1) + 16 = 18 g/mol Mass of H₂O from the balanced equation = 2 × 18 = 36 gFrom the balanced equation above,
36 g of H₂O were produced from 16 g of CH₄
How to determine the mass of CH₄ requiredFrom the balanced equation above,
36 g of H₂O were produced from 16 g of CH₄
Therefore,
24 g of H₂O will be produced from = (24 × 16) / 36 = 10.67 g of CH₄
Thus, 10.67 g of CH₄ is needed for the reaction
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Complete question:
See attached photo
Anyone knows the answer?
Answer:
No I do not but did you know that you can save 15 or more on car insurance by switching to geico?
Explanation:
The magnet on the right is moved toward the suspended magnet on the left.
Which statement describes the interactions of the magnets in terms of their magnetic fields
When the magnet on the right is moved toward the suspended magnet on the left, a repulsive force between the two magnets causes the suspended magnet to swing to the left; option B
What are magnets?Magnets are materials which exhibit magnetism or produces a magnetic field.
Magnets attract other objects to themselves and these objects are said to be magnetic.
Magnetic objects include metals such as iron.
A magnet has two ends called poles. The poles of a magnet are the North and South pole.
Magnetic lines of forces begin at the North pole whereas magnetic lines of forces end in at the south Pole.
The law of magnetism states that like poles of a magnet repel each other while unlike poles attract.
Considering the given magnets;
the magnet on the right is moved toward the suspended magnet on the left causing the suspended magnet to move to the left means that the end of the magnets repel each other.
This implies that the ends are two similar ends of the magnets.
In conclusion, unlike ends of a magnet attract whereas unlike ends repel.
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Note that the complete question is given below:
The magnet on the right is moved toward the suspended magnet on the left.
Which statement describes the interactions of the magnets in terms of their magnetic fields?
A. A repulsive force between the two magnets causes the suspended magnet to swing to the left.
B. A repulsive force between the two magnets causes the suspended magnet to oscillate like a pendulum.
C. An attractive force between the two magnets causes the suspended magnet to swing to the right.
D. An attractive force between the two magnets cause the suspended magnet to oscillate like a pendulum.
Why is Hydrogen-2 a heavier isotope than Hydrogen-1?
A. Hydrogen-2 has one more proton
B. Hydrogen-2 has one more neutron
Answer:
It is A. hydrogen -2 has one more proton
I need help with this question
Answer:
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Explanation:
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If a sample originally had 410 atoms of carbon-14, how many atoms will remain after 16,110 years?
Answer:
58.4 atoms
Explanation:
To find the remaining amount of atoms, you need to use the half-life formula:
[tex]A = A_0*(\frac{1}{2})^{\frac{t}{h}[/tex]
In this formula,
-----> A = remaining amount (atoms)
-----> A₀ = initial amount (atoms)
-----> t = time passed (years)
-----> h = half-life (years)
The half-life is the amount of time that needs to pass for the initial amount of a substance to decay by 50% (or 1/2). According to the graph, 50% of the initial substance is left after 5,730 years.
A = ? atoms t = 16,110 years
A₀ = 410 atoms h = 5,730 years
[tex]A = A_0*(\frac{1}{2})^{\frac{t}{h}[/tex] <----- Half-life formula
[tex]A = 410*(\frac{1}{2})^{\frac{16,110}{5,730}[/tex] <----- Insert values
[tex]A = 410*(\frac{1}{2})^{2.81[/tex] <----- Divide 16,110 by 5,730
[tex]A = 410*0.142[/tex] <----- Raise [tex]\frac{1}{2}[/tex] to 2.81
[tex]A = 58.4[/tex] <-----Multiply 410 and 0.142
I need answers to all of them
Answer:
Compound 1: Carbon Dioxide (CO_2)
Compound 2: Water (H_2 O)
Compound 3: Potassium Nitrate (KNO_3)
Compound 4: I am unsure
Compound 5: Calcium Sulfate
Explanation:
Calculate the density (in g/mL) of an object that has a mass of 3.81 g and a volume of
14.3 mL.
Answer:
Density = M/V
so 3.81/14.3 .266g/ml
Explanation:
What would be the new pressure if a 400 mL gas sample at 380 mm Hg is expanded to 800 mL with no change in temperature
Answer:
25 atm or 190mmHg
Explanation:
Since Temperature is constant we dont need to worry about it so.
P1V1=P2V2
Rewritten as (P1xV1)/V2 Always use liters in gas laws
I Prefer atm so ill convert to that to use in the equation.
(.5atmx.4L)/.8L =.25 atm or 190mmHg
(You can convert mmHg to atm by dividing by 760)
Assign an oxidation number to each element in the reaction
The question is incomplete, the complete question is;
Assign an oxidation number to each element in the reaction.
CO(g) + 2H2(g) → CH3OH(g)
In CO, the oxidation number of C is _, and that of O is _.
In H2, the oxidation number of H is _.
In CH3OH, the oxidation number of C is _, that of O is _, and that of H is _.
Answer:
See explanation
Explanation:
If we look at the reaction, in CO, C is +2 while O is -2. Remember that the sum of all the oxidation numbers in a compound must be zero.
The oxidation number of atoms in a diatomic molecule is zero hence in H2, H is zero.
We already know the oxidation states of oxygen and hydrogen in CH3OH to be -2 and +1 respectively. Carbon is;
x + 4(1) + (-2) = 0
x + 2 =0
x = -2
Hence in CH3OH, carbon has an oxidation state of -2.
On the periodic table, Nitrogen has 7 what?
Answer:
[tex]\boxed {\boxed {\sf 7 \ protons}}[/tex]
Explanation:
On the Periodic Table, Nitrogen is:
A nonmetalIn group 15 and period 2 With an atomic mass of 14.007 amu With the atomic number 7In elements, their atomic number is also equal to the number of protons. As the number of protons in an atom change, so does the identity of the atom.
Since nitrogen has an atomic number of 7, it must always have 7 protons
CHEMISTRY PLEASE HELP ITS MY FINAL
Answer:
1. Periodic Table
2. Periods
3. Groups
4. Metals
5. Non - Metals
6. Metalloids
7. Alkaline Metals
8. Transition Metals
Explanation:
i hope this was right. Tell me if it was wrong.
Answer:
1. Periodic table
2. Periods
3. Groups
4. Metals
5. Nonmetals
6. Metalloids
7. Representative elements
8. Transitition metals
Explanation:
Note for the 7th blank: it's either representative elements or main group elements. I'm not sure what terminology is on your vocab list, so keep that in mind. Good luck on your final!
Do the following math operation and report your answer to the
correct number of significant digits.
10.000-9.768/5.78
The following math operation and report your answer to the
correct number of significant digits is. 4.013×10^-2
now we have given 10.000-9.768/5.78,
we have to find correct significant digits
10.000-9.768 ÷5.78
=0.232÷5.78
=0.04013, it has 4 significant figure
we have to write in significant digit
so 0.04013 = 4.013×10^-2
Instead of expressing the magnitude of a measured number, significant figures or digits do so. The last digit, whose value is only roughly known, and the number of precisely known digits together make up the important figures, according to scientific tradition.The laws of arithmetic, addition, subtraction, multiplication, and division, are used to calculate any measurement because the significant figures represent numbers. Because any measurement is calculated by compounding two or more variables, these calculated results may have been measured with varying degrees of accuracy and are inevitably flawed.To know more about significant digit
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Zinc (Zn) can be described as a bluish-white metal that is brittle at room
temperature, conducts heat and electricity, and burns in air.
Which of the following is a chemical property of zinc?
A. Zinc is brittle at room temperature.
B. Zinc burns in air.
C. Zinc is bluish-white.
D. Zinc conducts heat
Answer:
B. Zinc burns in the air.
Explanation:
A chemical property of an element is known as the property of that specific element that is apparent or visible when the element has gone through a chemical reaction with other substances or elements under investigation.
In this case, the correct answer is option B which is " Zinc burns in the air" because it shows zinc to react chemically with air which then changes its properties.
The others are just physical properties of zinc