*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆**☆*――*☆*――*☆*――*☆
Answer: True
I hope this helped!
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- Zack Slocum
*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆**☆*――*☆*――*☆*――*☆
Answer:
true
Explanation:
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].
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
Please help!!!!!!!!!!!!!!
Answer:
my guy we need to read lesson cuz int know what any of that mean
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:
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].
15 The Following statement describes which body system? It also produces blood cells, and stores calcium. It regulates endocrine as well. This specific system uses all bones & joints in your body. A. The Lymphatic System B.The Muscular System C.The Reproductive System D.The Skeletal System
If I contain 2 moles of gas in a container with a volume of 30 liters and at a temperature of 337 K, what is the pressure inside the container?
Answer:
1.84
Explanation: just input the value into the formula pv=nrt
p*30=2*0.08206*337 then divide both sides by 30 and get 1.84
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.
The oceanic crust is mostly associated with the —————.
A. Thermosphere
B. Hydrosphere
C. Asthenosphere
D. Volcanoesphere
E. Atmosphere
c) If 21.0 g of potassium reacts with 62.5 g of barium nitride, what mass of potassium nitride will be produced?
Explanation:
21.0 g of potassium reacts with 62.5 g of barium nitride, what mass of potassium nitride will be produced
number of atoms per unit cell in face centred cube is
Answer: 4 atoms is the answer. I hope it helped you.
Explanation:
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⁺
5.50 L of a 0.190 M CaCl2M CaCl2 solution
How do you find Grams?
Answer:
115.891
Explanation:
Molarity is equal to moles/liters so to get moles we multiply molarity by liters, after this we multiply the moles by the total atomic weight of the compound to get grams
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.
Learn more: https://brainly.com/question/14950262
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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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.
During the reaction of 2,4-dinitrofluorobenzene with methoxide in methanol it was observed that it occurs at a significantly higher rate than the same reaction of 3,4-dinitrofluorobenzene. Explain the observation with a detailed mechanism and convincing structural arguments.
Answer:
Explanation:
your not so smart
What is the molarity of a solution made by adding :1.565 moles of PbN03 to 500 mL
Answer:
This question is a bit vague. We're not told if 500ml is the volume of the solution and additional info is not given to calculate the volume of pbNo3 being added.
If you solve with 500ml as the volume of solution ... You'll have the answer below.
Molarity=moles of solutes/Volume of solvent(in litres)
moles of solute given=1.565moles
Volume = 500ml. There's 1000ml to a litre. Dividing by 1000ml to convert to Litres... You have 0.5L
Molarity = 1.565/0.5
=3.13M
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)
PLSSS HELP ASAP!!!!!!!!
Answer:
i-dk but A seems most logical to me
Explanation:
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).
A solution has a pH of 9.5. Is the solution an acid or a base?
Answer:
The solution is Basic
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!
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
What can be different between products and reactants in a balanced equation?
a) The total mass of products and reactants
b) The total moles of each element present in the reactants and in the products.
c) The number of molecules in the reactants and in the products
Answer:
b) The total moles of each element present in the reactants and in the products.
Explanation:
Hello there!
In this case, since the law of conservation of mass is used to realize that the mass, atoms and molecules of all the species involved in a chemical reaction must be the same at both reactants and products, we can see that a and c stand for those that must be equal; thus, we infer that the moles can be different as they stand for the amount of substance which is related to the mass via molar masses. Therefore, the answer would be b) The total moles of each element present in the reactants and in the products.
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Help help help :/
Please
True or False:
The geocentric model of the solar system is correct.
Answer:
True
Explanation:
Which of the following is TRUE about most gases?
1) They expand to completely fill their container.
2) They cannot be compressed.
3) All of their particles are the same size.
4) They have a fixed volume.
5) Their particles are very close together.
Explanation:
I think it is the first option
Answer:
1) They expand to completely fill their container. :)
Explanation:
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 =
Submit
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.