Answer:
101.6ml
Explanation:
Using the formula;
CaVa = CbVb
Where;
Ca = concentration of acid (M)
Cb = concentration of base (M)
Va = volume of acid (ml)
Vb = volume of base (ml)
Based on the information as follows:
Ca = 2.5M
Cb = 1.23M
Va = 50ml
Vb = ?
Using CaVa = CbVb
2.5 × 50 = 1.23 × Vb
125 = 1.23Vb
Vb = 125/1.23
Vb = 101.6ml
What is the new concentration? L
M NaCl
Answer:
Explanation:
\we must convert the mass of NaCl in grams into moles. We do this by dividing by the molecular weight of NaCl (58.4 g/mole). Then, we divide the number of moles by the total solution volume to get concentration. The NaCl solution is a 0.1 M solution.
Answer:
0.125
Explanation:
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Answer:
5.C6.DExplanation:
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Plz help plz help me will mark Brainly
Answer:
Greenhouse gases absorb some of the energy and trap it in the lower atmosphere. Less heat radiates into space, and Earth is warmer. Many greenhouse gases occur naturally. Carbon dioxide, methane, water vapor, and nitrous oxide are naturally present in Earth's atmosphere. Since some of the extra energy from a warmer atmosphere radiates back down to the surface, Earth's surface temperature rises.
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Find the % composition for each element in Zinc Chlorate
Answer:
chlorine ~ 30%
zinc ~ 28%
oxygen ~ 41%
Explanation:
Which best describes the conservation of energy as a pendulum swings in the path shown ?
A.The potential energy at point A is greater than the potential energy at point C.
B.The potential energy at point A is equal to the kinetic energy at point C.
C.The potential energy at point A is greater than the kinetic energy at point B.
D.The potential energy at point A is equal to the kinetic energy at point B.
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Approximately what mass of potassium nitrate will eventually precipitate from a supersaturated solution containing 19 grams of the solute in 28 grams of water at 40C°?
A supersaturated solution contains more solute at a given temperature than is needed to form a saturated solution.
Increased temperature usually increases the solubility of solids in liquids.
For example, the solubility of glucose at 25 °C is 91 g/100 mL of water. The solubility at 50 °C is 244 g/100 mL of water.
If we add 100 g of glucose to 100 mL water at 25 °C, 91 g dissolve. Nine grams of solid remain on the bottom. We have a saturated solution.
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Can anyone please help?
Answer:
Earth
Explanation:
Earth is unique in the fact that we have an oxygen-rich atmosphere
what will cause electrons in an atom to love outward from their regular orbit
Answer:
When an electron is hit by a photon of light, it absorbs the quanta of energy the photon was carrying and moves to a higher energy state. So the electron moves to a different orbital where once again its own wavelength is in phase with its self.
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Explanation:
Answer:
In the Bohr atom electrons can be found only in allowed orbits, and these allowed ... that the angular momentum of an electron in orbit, like everything else in the quantum world,
If you have 1.4 grams of silver (Ag), how many moles of silver do you have?
Answer: There are 0.0129 moles of silver present in 1.4 grams of silver (Ag).
Explanation:
Given: Mass of silver = 1.4 g
Number of moles is the mass of substance divided by its molar mass.
As molar mass of silver is 107.86 g/mol. Therefore, moles of silver are calculated as follows.
[tex]No. of moles = \frac{mass}{molar mass}\\= \frac{1.4 g}{107.86 g/mol}\\= 0.0129 mol[/tex]
Thus, we can conclude that there are 0.0129 moles of silver present in 1.4 grams of silver (Ag).
Which of the following particles have the same mass. Proton, Neutron, Electron, None
Answer: proton and neutron
Explanation:
They both have the mass of 1
The ΔHfus for ethanol is 4.60 kJ/mol. If it takes 7500.0 Joules of energy to melt a sample of ethanol, how many grams of ethanol are in the sample? The chemical formula for ethanol is C2H5OH.
Answer:
Explanation:
1 point
To help you with estimating, the individual answers to A, B, C should all
have zero in the one's place. Add those answers up to get the numerical
code. Input that code to move on.*
A) 56 g NH3 can be dissolved in 100 g of water at °C
B) At 50°C, 166 g of KNO, can be dissolved in g of water to make a saturated
solution
C) At 76°C, KCI and HCI have the same solubility. What mass of each could be dissolved in
80 g of water?
Your answer
This is a required question
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Answer:ee
Explanation:
How do we measure the rate of this reaction A + B —> C
Which equation represents a transmutation?
Answer:
A
Explanation:
edge21
What is The metric unit for volume ?
Answer:
milliliters
Explanation:
Is going to be milliliters because in the metric system of measurement,the most common unit of volume are milliliters and liters
pls help Which statement is true about the environment of urban areas?
Urban areas have higher temperatures.
Urban areas have few problems with soil erosion.
Urban areas have more rain infiltration into the soil.
Urban areas have less habitat fragmentation.
The statement that is correct about Urban areas is that they have higher temperatures.
Urban Area is a term to refer to cities. Urban areas are characterized by having a developed infrastructure (wide roads, vehicular bridges, wide platforms, tall buildings, residential areas, industrial areas, among others).
Recent studies affirm that urban areas are warmer than surrounding areas; This phenomenon is because the materials with are built buildings, roads, houses, and others, concentrate the sun's rays, increasing the temperature of cities. In addition, the lack of trees deepens this phenomenon, because the trees contribute to cooling by physicochemical processes such as evapotranspiration.
According to the above, it is possible to affirm that urban areas are hotter than their surrounding area because they lack vegetation, and the materials with which it is built contribute to the increase in temperature.
On the other hand, urban areas are characterized by habitat fragmentation, more problems with soil erosion, and less rain infiltration into the soil.
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Answer:
A) higher temps
Explanation:
other two substances present in breathed out air
Answer:
Gases we Breathe Out
It is the same air that we inhale. ... The amount of inhaled air contains 21% of oxygen and 0.04% of carbon dioxide, while the air we breathe out contains 16.4% of oxygen and 4.4% of carbon dioxide.
Answer:
Inhaled air is by volume 78% nitrogen, 20.95% oxygen and small amounts of other gases including argon, carbon dioxide, neon, helium, and hydrogen. The gas exhaled is 4% to 5% by volume of carbon dioxide, about a 100 fold increase over the inhaled amount.
Which of the following contains the least amount (number) of molecules?
Group of answer choices
5.0 g O2
5.0 g H2O
5.0 g N2
5.0 g CO2
Ionic, metallic, or covalent??? Need now
Answer:
Covalent
Explanation:
What is the freezing point (in °C) of a 0.743 m
aqueous solution of KCI?
Enter your rounded answer with
3 decimal places.
K; for water = 1.86 °C/m
Answer: The freezing point (in °C) of a 0.743 m aqueous solution of KCI is [tex]2.763^{o}C[/tex].
Explanation:
Given: Molality = 0.743 m
[tex]K_{f}[/tex] for water = [tex]1.86^{o}C/m[/tex]
The equation for dissociation of KCl when dissolved in water is as follows.
[tex]KCl \rightarrow K^{+} + Cl^{-}[/tex]
As it is giving 2 ions. Therefore, Van't Hoff factor for it is equal to 2.
Formula used to calculate the freezing point is as follows.
[tex]\Delta T_{f} = i \times K_{f} \times m[/tex]
where,
i = Van't Hoff factor
[tex]K_{f}[/tex] = molal depression constant
m = molality
Substitute the values into above formula as follows.
[tex]\Delta T_{f} = i \times K_{f} \times m\\= 2 \times 1.86^{o}C/m \times 0.743 m\\= 2.763^{o}C[/tex]
Thus, we can conclude that the freezing point (in °C) of a 0.743 m aqueous solution of KCI is [tex]2.763^{o}C[/tex].
You react hydrogen gas with chlorine gas according to the following reaction:
H2(g) * Cl2(g) -> 2HCl(g)
What mass of HCl(g) can be produced from 2.5 * 10^3 g of hydrogen gas with an excess of chlorine gas?
Answer:
91150 g
Explanation:
H₂(g) + Cl₂(g) → 2HCl(g)First we convert 2.5x10³ g of hydrogen gas into moles, using its molar mass:
2.5x10³ g ÷ 2 g/mol = 1250 molThen we convert 1250 moles of H₂ into HCl moles, using the stoichiometric coefficients of the reaction:
1250 mol H₂ * [tex]\frac{2molHCl}{1molH_2}[/tex] = 2500 mol HClFinally we convert 2500 moles of HCl into grams, using its molar mass:
2500 mol HCl * 36.46 g/mol = 91150 gCarbon-14 has a half-life of 5730 years. How much of a 144 g sample of carbon-14 will remain after 100,000 years?
Answer:
0.001 g
Explanation:
From the question given above, the following data were obtained:
Half-life (t½) = 5730 years
Original amount (N₀) = 144 g
Time (t) = 100,000 years
Amount remaining (N) =?
Next, we shall determine the number of half-lives that has elapsed. This can be obtained as follow:
Half-life (t½) = 5730 years
Time (t) = 100,000 years
Number of half-lives (n) =?
n = t / t½
n = 100,000 / 5730
n ≈ 17
Finally, we shall determine the amount remaining. This can be obtained as follow:
Original amount (N₀) = 144 g
Number of half-lives (n) = 17
Amount remaining (N) =?
N = 1/2ⁿ × N₀
N = 1/2¹⁷ × 144
N = 1/131072 × 144
N = 0.000007 × 144
N ≈ 0.001 g
Thus, the amount remaining after 100000 years is 0.001 g
Jasmine travels a lot and collects rocks wherever she goes. She was examining two rocks from her collection, and she noticed that they are different types of rock. How could energy have played a role in the different rock types forming?
A. Energy changes rock on different continents in different ways. Each continent on Earth has different rock that might form liquid rock or small rock pieces when exposed to energy.
B. Energy caused one rock type to form, but not the other. Rock that forms because of energy is a different type of rock than rock that forms without energy.
C. Energy from different sources leads to different types of rock. Energy inside Earth melts rock into liquid rock, but energy from the sun causes rock to weather into small pieces of rock.
D. Energy causes different types of rock to change in different ways. Energy changes igneous rock into liquid rock and changes sedimentary rock into small pieces of rock.
Answer:
C
Explanation:
energy from different sources leads to different types of rocks. energy inside the earth(volcanoes) melts rocks into liquid rock(molten larva) but energy from the sun(heat radiation) causes rock to weather(breakdown) into small pieces of rocks
What is the volume in liters that is needed to create a 2.3 M solution with 3.7 moles of Fe(OH)2? Round your answer to 1 decimal.
Answer:
Explanation:
Não sei desculpa
Consider an electron with charge −e−e and mass mmm orbiting in a circle around a hydrogen nucleus (a single proton) with charge +e+e. In the classical model, the electron orbits around the nucleus, being held in orbit by the electromagnetic interaction between itself and the protons in the nucleus, much like planets orbit around the sun, being held in orbit by their gravitational interaction. When the electron is in a circular orbit, it must meet the condition for circular motion: The magnitude of the net force toward the center, FcFcF_c, is equal to mv2/rmv2/r. Given these two pieces of information, deduce the velocity vvv of the electron as it orbits around the nucleus. Express your answer in terms of eee, mmm, rrr, and ϵ0ϵ0epsilon_0, the permittivity of free space.
Answer:
Explanation:
The net force on electron is electrostatic force between electron and proton in the nucleus .
Fc = [tex]\frac{1}{4\pi\epsilon} \times \frac{e\times e}{r^2}[/tex]
This provides the centripetal force for the circular path of electron around the nucleus .
Centripetal force required = [tex]\frac{m\times v^2}{r}[/tex]
So
[tex]\frac{m\times v^2}{r}=\frac{1}{4\pi\epsilon} \times \frac{e\times e}{r^2}[/tex]
[tex]v^2=\frac{e^2}{4\pi \epsilon m r}[/tex]
[tex]v=(\frac{e^2}{4\pi \epsilon m r})^{\frac{1}{2} }[/tex]
3. If an item of trash is described as highly biodegradable, is that a physical property or
chemical property?.
is this correct im just asking because my little brother not sure for his answer
Determine the type of reaction: AgNO3 + Cu --> Cu(NO3)2 + Ag
Explanation:
Cu + 2 AgNO3 → Cu(NO3)2 + 2 Ag
Cu is oxidized
Ag+ is reduced
Cu is the reducing agent
To solve such this we must know the concept of displacement reaction. The balanced reaction of silver nitrate with copper is of displacement type of reaction.
AgNO[tex]_3[/tex] + Cu [tex]\rightarrow[/tex] Cu(NO[tex]_3[/tex])[tex]_2[/tex] + Ag
What is Balanced equation?Balanced equation is the one in which the total number of atoms of a species on reactant side is equal to the total number of atoms on product side. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, displacement reaction.
The reaction between silver nitrate and copper is example of displacement reaction. Copper displaces silver from silver nitrate. to form copper nitrate.
Therefore, the balanced equation is of displacement type of reaction.
AgNO[tex]_3[/tex] + Cu [tex]\rightarrow[/tex] Cu(NO[tex]_3[/tex])[tex]_2[/tex] + Ag
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An increase in temperature will cause an increase in diffusion rate because Multiple Choice hot molecules get smaller and therefore diffuse faster. the frequency and force of molecular collisions decreases. hot water changes to a solid, so diffusion is easier. hot water is thinner than cold water. the frequency and force of molecular collisions increases.
Answer:
hot water is thinner than cold water.
Explanation:
The rate of diffusion of a substance has a lot to do with the temperature of a body.
Let us take water for instance, cold water has a greater density than hot water. As a result of this, the molecules in cold water are slower when in motion and more sluggish.
On the other hand, the molecules of hot water are quite faster since hot water has a lower density(thinner than cold water).
Thus, an increase in temperature will cause an increase in diffusion rate because hot water is thinner than cold water.
what is the most well known supercontinent?
Answer:
Pangaea
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