Answer:150
Explanation:I think because f=MxA and the mass is 37.5 kg while acceleation is 4 m/s^2 and when you multiply that is gets 150 so F=150 N
one drawback of x-ray scattering experinment.
Answer:
Rutherford passed beams of alpha particles through a thin gold foil to observe the atom and noted how the alpha particles scattered from the foil.
Observations of Rutherford's alpha ray scattering experiment:
1.Most of the α-particles passed straight through the gold foil without any deviation.
2. Some of the α-particles were deflected by the foil by some angles.
3.Interestingly one out of every 12,000 alpha particles appeared to rebound
Conclusion of Rutherford's scattering experiment:
1.Most of the space inside the atom is empty because most of the α-particles passed through the gold foil without getting deflected.
2. Very few particles were deflected from their path, indicating that the positive charge of the atom occupies very little space.
3. A very small fraction of α-particles were deflected by very large angles, indicating that all the positive charge and mass of the gold atom were concentrated in a very small volume within the atom.
How are u ??Hopefully u will satisfy with my answer of ur question..!!Mark on brainleast please..!!Have a nice day ahead dear..!!Deep water currents are formed partly due to the amount of _________________ in the water.
Answer:
Density differences
Explanation:
The water transports cool masses of air and hot air, the transports is driven by the amount of changes of Temperature and Salinity (ThermoHaline)
explain why we see the pattern between predator and prey
Answer:
The food chain starts as prey to a preditor and then when the preditor dies the prey eat the preditor
Explanation:
Just that
A 1.757-g sample of a / alloy was dissolved in acid and diluted to exactly 250.0 mL in a volumetric flask. A 50.00-mL aliquot of the diluted solution was brought to a pH of 10.0 with an / buffer; the subsequent titration involved both cations and required 28.89 mL of 0.06950 M EDTA. A second 50.00-mL aliquot was brought to a pH of 10.0 with an / buffer, which also served to mask the ; 19.07 mL of the EDTA solution were needed to titrate the . Calculate the percent and in the sample.
Answer:
78.14% Pb²⁺ and 21.86% of Cd²⁺
Explanation:
The first titration involves the reaction of both Pb²⁺ and Cd²⁺
In the second titration, as the buffer is HCN/NaCN, the Cd²⁺ precipitates as Cd(CN)₂ and the only ion that reacts is Pb²⁺
In the first titration:
Moles EDTA = Moles Pb²⁺ and Cd²⁺:
28.89mL = 0.02889L * (0.06950moles / L) = 2.008x10⁻³ moles in the aliquot. In the sample:
2.008x10⁻³ moles * (250.0mL / 50.0mL) =
0.01004 moles = Pb²⁺ + Cd²⁺ (1)
In the second titration:
19.07mL = 0.01907L * (0.06950mol / L) = 1.325x10⁻³ moles Pb²⁺ in the aliquot. In the sample:
1.325x10⁻³ moles Pb²⁺ * (250.0mL / 50.0mL) =
6.626x10⁻³ moles Pb²⁺
That means the moles of Cd²⁺ are:
0.01004 moles = Cd²⁺ + 6.626x10⁻³ moles Cd²⁺
3.413x10⁻³ moles Cd²⁺
The mass of each ion is:
Cd²⁺ -Molar mass: 112.411g/mol-:
3.413x10⁻³ moles Cd²⁺ * (112.411g / mol) =
0.384g of Cd²⁺
Pb²⁺ -Molar mass: 207.2g/mol-:
6.626x10⁻³ moles Pb²⁺ * (207.2g / mol) =
1.373g of Pb²⁺
The percent mass of each ion is:
1.373g Pb²⁺ / 1.757g = 78.14% Pb²⁺
And:
0.384g of Cd²⁺ / 1.757g * 100 = 21.86% of Cd²⁺
Tectonic plates interact with each other and can create landforms. TRUE/FALSE
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Answer: True
I hope this helped!
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- Zack Slocum
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Answer:
true
Explanation:
Write the balanced NET IONIC equation for the reaction that occurs when ammonium bromide and sodium hydroxide are combined. This reaction is classified as fill in the blank 6 . A. Strong Acid Strong Base B. Weak Acid Strong Base C. Strong Acid Weak Base D. Weak Acid Weak Base The extent of this reaction is: fill in the blank 7 . A. ... Below 50% B. ... 50% C. ... Above 50% D. ... 100%
Answer:
c
Explanation:
I NEED HELP WITH THIS CHEMISTRY QUESTION PLS
Answer:
Iron, according to:
[tex]2Al(s)+3Fe(NO_3)_2(aq)\rightarrow 3Fe(s)+2Al(NO_3)_3(aq)[/tex]
Explanation:
Hi there!
In this case, according to the law of conservation of mass, which states that matter cannot be neither created nor destroyed, it is possible for us to figure out the missing element in the reaction by taking into account this is a single displacement reaction in which Al goes with NO3 to produce the Al(NO3)3, and therefore the other element would be iron (Fe) as can be seen on the following chemical reaction:
[tex]2Al(s)+3Fe(NO_3)_2(aq)\rightarrow 3Fe(s)+2Al(NO_3)_3(aq)[/tex]
Best regards!
a sample of 0.0084 mol of HCl is dissolved in water to make a 1500 mL solution. calculate the molar it’s of the HCl solution, The H3O, and the pH
Answer:
pH = 2.25
Explanation:
pH is a measurement in chemistry defined as the -log [H₃O⁺]. Molarity [], is defined as the ratio between moles of solute (HCl) and the liters of solution
To solve this question we must find the molarity of the H₃O⁺ knowing: [HCl] = [H₃O⁺]
[HCl]:
0.0084moles / 1.500L
= 0.0056M = [HCl] = [H₃O⁺]
pH = -log [H₃O⁺] = -log [0.0056M]
pH = 2.25A solution prepared by dissolving 0.0084 moles of HCl in 1500 mL of solution has a molar concentration of HCl of 5.6 × 10⁻³ M, a molar concentration of H₃O⁺ of 5.6 × 10⁻³ M and a pH of 2.3.
A solution is prepared by dissolving 0.0084 moles of HCl in 1500 mL of solution. The molarity of HCl is:
[tex][HCl] = \frac{0.0084mol}{1.5L} = 5.6 \times 10^{-3} M[/tex]
HCl is a strong acid according to the following equation.
HCl(aq) + H₂O(l) ⇒ Cl⁻(aq) + H₃O⁺(aq)
Thus, the concentration of H₃O⁺ will be equal to the initial concentration of HCl, 5.6 × 10⁻³ M.
Finally, we will calculate the pH of the solution using its definition.
[tex]pH = -log [H_3O^{+} ] = -log (5.6 \times 10^{-3} ) = 2.3[/tex]
A solution prepared by dissolving 0.0084 moles of HCl in 1500 mL of solution has a molar concentration of HCl of 5.6 × 10⁻³ M, a molar concentration of H₃O⁺ of 5.6 × 10⁻³ M and a pH of 2.3.
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what is the freezing point of glucose?
Answer:
In Fahrenheit it is 294.8°F and in Celsius it is 146°C.
A solution has a pH of 9.5. Is the solution an acid or a base?
Answer:
The solution is Basic
The oceanic crust is mostly associated with the —————.
A. Thermosphere
B. Hydrosphere
C. Asthenosphere
D. Volcanoesphere
E. Atmosphere
How does increasing and decreasing the temperature affect the kinetic energy of molecules? How does this impact heat
transfer?
Answer: As the temperature of a molecular system increases, the kinetic energy of molecules also increase. Also as the temperature of a molecular system decreases, the kinetic energy of the molecules will also decrease.
Explanation:
James Clerk Maxwell developed the kinetic-molecular theory (KMT) of gases. In this theoey, five assumptions concerning an ideal gas was made. One of the them was that," the average kinetic energy of the gas molecules is proportional to the temperature of the gas". This simply means that a s the temperature of a molecular system increases, the kinetic energy of molecules also increase. Also as the temperature of a molecular system decreases, the kinetic energy of the molecules will also decrease.
Also another scientist known as Rudolf Clausius incorporated energy into the kinetic theory. He proposed that heat is a form of energy that affects the temperature of matter by changing the motion of molecules in matter.
Heat is defined as the flow of energy which is caused by difference in temperature.
In conclusion, when the temperature of a system is increased, the collision of the molecules with one another and the walls of their container increases as more molecules gain more heat energy at higher temperature. While as the temperature of the system decreases, the collision of the molecules will also decrease as molecules lose heat energy at lower temperature.
Answer:
Temperature increases the average kinetic energy of the atoms as well as molecules increases because when the temperature increases the collision between the atom and molecules increases and particles may collide with one another.
because it may associate with the thermal energy when thermal energy increases because of the motion of the gas particle and may initiate the kinetic energy of the gas.
when the temperature goes increasing the movement of the particle is at a very high rate, especially in gas and then solids, and especially this must be increased when the endothermic reaction is involved this must proceed such a reaction that the temperature results in to increase in the average kinetic energy.
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What is the frequency of light (in per seconds) that has a wavelength of 670 nm?
Answer:
[tex]f=4.47\times 10^{14}\ Hz[/tex]
Explanation:
Given that,
The wavelength of light, [tex]\lambda=670\ nm=670\times 10^{-9}\ m[/tex]
We need to find the frequency of the light. The relation between the frequency and wavelength is given by :
[tex]v=f\lambda[/tex]
The speed of light is equal to c.
So,
[tex]f=\dfrac{c}{\lambda}\\\\f=\dfrac{3\times 10^8}{670\times 10^{-9}}\\\\f=4.47\times 10^{14}\ Hz[/tex]
So, the frequency of light is equal to [tex]4.47\times 10^{14}\ Hz[/tex].
Balance the following skeleton reaction in acidic solution (if the coefficient is 1, put 1; if the coefficient is 0, put O) and identify the oxidizing and reducing agents. For the oxidizing and reducing agent, enter numbers and +/- directly for superscripts and subscripts.
(eg. enter HCO3- for HCO3-, Cu2+ for Cu2+)
Cr2012-(aq) + Zn(s) — Zn2+(aq) + Cr3+(aq)
Cr20-2-(aq) + Zn(s) + H+(aq) +
H20(1) —> Zn2+(aq) + Cr3+(aq) +
H+(aq) + H2O(1) (acidic)
Oxidizing agent:
Reducing agent:
Answer:
jdjdjsjdjkxjejf
Explanation:
djdjsjsdkdkdk
Compounds consist of two or more elements. Which of the following properties must each of the elements in a compound
have?
A. solubility
B. conductivity
c. high density
D. chemical reactivity
explain the importance of changing states of matter
As a result, when a substance absorbs enough energy then its atoms or molecules move around. And, when increase in this energy takes place then atoms tend to collide frequently with each other. Hence, it causes change in state of a substance. Therefore, changes in matter are important for the conservation of energy
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Please help!!!!!!!!!!!!!!
Answer:
my guy we need to read lesson cuz int know what any of that mean
Explanation:
A _________________ is the path of energy transfer from producer to consumers.
Someone please help
Answer: Food chain
Explanation: none
how many types of hybridization does carbon undergo?
Answer:
For carbon the most important forms of hybridization are the sp2- and sp3- hybridization. Besides these structures there are more possiblities to mix dif- ferent molecular orbitals to a hybrid orbital. An important one is the sp- hybridization, where one s- and one p-orbital are mixed together.
Part
A certain gas is present in a 110 L cylinder at 2.0 atm pressure. If the pressure is increased to 4.0 atm, the volume of the gas
decreases to 5.5 L. Find the two constants k. the initial value of k, and kr, the final value of k, to verify whether the gas obeys Boyle's
law.
Express your answers to two significant figures separated by a comma.
View Available Hint(s)
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k ke =
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Answer:
See explanation
Explanation:
Recall that from Boyle's law;
Volume is inversely proportional to pressure at constant temperature
V α 1/P
V = k/P
k = PV
Hence, for Boyle's law, PV = constant
In the first case;
P = 2.0 atm , V= 110 L
PV = 110 * 2.0 = 220
In the second case;
P = 4.0 atm , V= 5.5 L
PV = 4.0 * 5.5 = 22
Since PV is not constant in both cases, the gas does not obey Boyle's law.
If the Sun suddenly lost all of its gravity, which statement would best describe how the planets would move?
a
The planets would stop moving.
b
The planets would all collide into each other.
c
The planets would travel in a straight line.
d
The planets would continue moving in a circular path.
Answer:
It's B
Explanation:
It's the sun's gravitational pull that keeps our planets revolving around it and as soon as it's gone it's a high chance of it being a pinball machine and everything colliding into each other.
The phenomenon that causes air masses and water to bend or curve is the ______________.
PLZ I NEED HELP ILL GIVE BRAINLIEST
Answer:
The Coriolis effect
Explanation:
The Coriolis effect is the effect that makes tornados, water spouts, and are often seen in storms. They make water curve and rotate as well as the wind And current.
Large cities in the U.S. often formed near the ocean.
What benefit does the ocean provide for people in nearby large cities?
Answer:
a means of work
Explanation:
since its near oceans they are closer to the fish
Which of these statements BEST describes a possible environmental
consequence in constructing a large-scale wind farm to generate
electricity?
A Wind farms alter the regional climate.
B. Wind farms can disrupt migrating wildlife.
C. Wind farms use a renewable energy source.
D. Wind farms generate direct current electricity.
Answer:
Option B. is correct
Explanation:
Wind turbines collect the kinetic energy of wind using the turbine blades. The blades turn an electric generator as they are connected to a drive shaft, which in turn produces electricity.
These turbine blades can disrupt flying wildlife including bats and birds.
So,
wind farms can disrupt migrating wildlife.
Option B. is correct.
True or False:
The geocentric model of the solar system is correct.
Answer:
True
Explanation:
Describing Radiation Detection Instruments
Describe the nature and variety of instruments used to detect radiation.
Answer:A Geiger counter is an instrument used for detecting and measuring ionizing radiation. Also known as a Geiger–Müller counter (or Geiger–Muller counter), it is widely used in applications such as radiation dosimetry, radiological protection, experimental physics, and the nuclear industry.
Answer:
Geiger counter
scintillation counter
dosimeter
film badge
detection of ionizing radiation
detection of radiation in the environment
determination of the concentration of radio isotopes in the body
film sensitive to radiation
Explanation:
on edg
Use the information to answer the following question.
A machinist creates a solid steel part for a wind turbine. The part has a volume of 1,015 cubic centimeters. Steel can be purchased for $0.29 per kilogram and has a density of 7.95 g/cm3.
If the machinist makes 500 of these parts, what is the total cost of the steel?
A.
$2.34
B.
$1,152.75
C.
$2,340.08
D.
$1,170.84
Answer: D
Explanation:
A chemist must prepare 0.200 L of aqueous silver nitrate working solution. He'll do this by pouring out some aqueous silver nitrate stock solution into a graduated cylinder and diluting it with distilled water. Calculate the volume in of the silver nitrate stock solution that the chemist should pour out. Be sure your answer has the correct number of significant digits.
A chemist must prepare 0.200 L of 1.00 M aqueous silver nitrate working solution. He'll do this by pouring out 1.82 mol/L aqueous silver nitrate stock solution into a graduated cylinder and diluting it with distilled water. How many mL of the silver nitrate stock solution should the chemist pour out?
Answer: 0.110 L
Explanation:
According to the dilution law,
[tex]M_1V_1=M_2V_2[/tex]
where,
[tex]M_1[/tex] = molarity of stock silver nitrate solution = 1.82 M
[tex]V_1[/tex] = volume of stock silver nitrate solution = ?
[tex]M_1[/tex] = molarity of diluted silver nitrate solution = 1.00 M
[tex]V_1[/tex] = volume of diluted silver nitrate solution = 0.200 L
Putting in the values we get:
[tex]1.82M\times V_1=1.00M\times 0.200L[/tex]
[tex]V_1=0.110L[/tex]
Therefore, volume of silver nitrate stock solution required is 0.110 L
How much energy is required to raise the temperature of 10.6 grams of gaseous neon from
20.0 °C to 37.9 °C ?
Answer:
Approximately [tex]1.95 \times 10^{2}\; \rm J[/tex].
Explanation:
Look up the specific heat of gaseous neon:
[tex]c = 1.03 \; \rm J \cdot g^{-1} \cdot K^{-1}[/tex].
Calculate the required temperature change:
[tex]\Delta T = (37.9 - 20.0)\; \rm K = 17.9\; \rm K[/tex].
Let [tex]m[/tex] denote the mass of a sample of specific heat [tex]C[/tex]. Energy required to raise the temperature of this sample by [tex]\Delta T[/tex]:
[tex]Q = c \cdot m \cdot \Delta T[/tex].
For the neon gas in this question:
[tex]c = 1.03\; \rm J \cdot g^{-1}\cdot K^{-1}[/tex].[tex]m = 10.6\; \rm g[/tex].[tex]\Delta T = (37.9 - 20.0)\; \rm K = 17.9\; \rm K[/tex].Calculate the energy associated with this temperature change:
[tex]\begin{aligned}Q &= c \cdot m \cdot \Delta T \\ &= 1.03\; \rm J \cdot g^{-1}\cdot K^{-1} \times 10.6\; \rm g \times 17.9\; \rm K \\ &\approx 1.95 \times 10^{2}\; \rm J\end{aligned}[/tex].
5
How many J of energy are needed to raise the temperature of 18.3 g of
water from 11.88°C to 49.32°C?*
2540 J
1740 J
2870 J
3570 J
Q = mcΔT, where Q is the heat energy, m is the mass, c is the specific heat, and ΔT is the change in temperature (T₂-T₁). The specific heat of water is 4.184 J/g °C. We are given the mass of water (m = 18.3 g), the final temperature (T₂ = 49.32 °C), and the initial temperature (T₁ = 11.88 °C). The change in temperature, ΔT, equals 49.32 °C - 11.88 °C = 37.44 °C. With all these values at hand, we can solve for the amount of energy needed, Q:
Q = (18.3 g)(4.184 J/g °C)(37.44 °C) = 2866.7 J ≈ 2870 J (three sig figs).