Answer:
Sugar (Sucrose), Corn Syrup (Glucose), Molasses (C6H12NNaO3S)
Explanation:
Each of these is a sweetener.
Which of the above electron dot structures is wrong?
Be
B
Al
H
Ne
Answer:
Al
Explanation:
Aluminum (Al) is in the same group as Boron (B) so it should have three electrons or dots around it.
Hope that helps.
Answer:
Structre of Al is wrong
Means Al is right answer of the above question
Explanation:
Because valence shell of aluminum contains three electron not 5 elctrons
Correct structure of Al is given
3. Count the number of hydrogen atoms in 2 molecules of vitamin C (2c6H8O6
What kind of cell has a nonspontaneous voltage?
An electrolytic cell
A dry cell
A wet cell
A voltaic cell
Answer:
dry cell
Explanation:
because it stops when salt distribution becomes equal as bridge is not added
Answer:
a
Explanation:
a p e x :)
Suppose that 3.33 g of acetone at 25.0 °C condenses on the surface of a 44.0-g block of aluminum that is initially at 25 °C. If the heat released during condensation goes only toward heating the metal, what is the final temperature (in °C) of the metal block?
Answer:
68.6 °C
Explanation:
From conservation of energy, the heat lost by acetone, Q = heat gained by aluminum, Q'
Q = Q'
Q = mL where Q = latent heat of vaporization of acetone, m = mass of acetone = 3.33 g and L = specific latent heat of vaporization of acetone = 518 J/g
Q' = m'c(θ₂ - θ₁) where m' = mass of aluminum = 44.0 g, c = specific heat capacity of aluminum = 0.9 J/g°C, θ₁ = initial temperature of aluminum = 25°C and θ₂ = final temperature of aluminum = unknown
So, mL = m'c(θ₂ - θ₁)
θ₂ - θ₁ = mL/m'c
θ₂ = mL/m'c + θ₁
substituting the values of the variables into the equation, we have
θ₂ = 3.33 g × 518 J/g/(44.0 g × 0.9 J/g°C) + 25 °C
θ₂ = 1724.94 J/(39.6 J/°C) + 25 °C
θ₂ = 43.56 °C + 25 °C
θ₂ = 68.56 °C
θ₂ ≅ 68.6 °C
So, the final temperature (in °C) of the metal block is 68.6 °C.
The final temperature of the metal block is 74.97°C
What is the specific heat?The specific heat of a substance is the required quantity of heat needed to raise the temperature of 1 gram of the substance by 1° C.
From the parameters given:
The mass of acetone = 3.33 gThe number of moles of acetone is:
[tex]\mathbf{= 3.33 g \times \dfrac{mol}{58.08 \ mol}}[/tex]
= 0.0573 mol
At standard conditions, the heat of vaporization of acetone is:
[tex]\mathbf{\Delta H = 32.0 \ kJ/mol \times 0.0578 \ mol } \\ \\ \mathbf{\Delta H = 1.8496 \ kJ } \\ \\ \mathbf{ \Delta H = 1.85 \times 10^3 \ J}[/tex]
Given that:
The mass of the metal (m) = 44.0 gThe initial temperature [tex]\mathbf{T_1}[/tex] = 25° CThe final temperature [tex]\mathbf{T_2 = ???}[/tex]The specific heat of the aluminum is = 0.903 J/g° C
The heat energy can be computed as:
q = msΔT
q = 41 g × 0.903 J/g° C × (x - 25°C)
Using the calorimetry principle, heat energy lost by metal = heat energy gained by acetone.
i.e.
[tex]\mathbf{q_{(acetone)} gain = q_{(metal)} lost }[/tex]
[tex]\mathbf{-1.85 \times 10^3 \ J = - 41 g \times 0.903 \ J/g^0 C \times ( x - 25^0 c) }[/tex]
[tex]\mathbf{1.85 \times 10^3 \ J = 41 g \times 0.903 \ J/g^0 C \times ( x - 25^0 c) }[/tex]
[tex]\mathbf{(x - 25 ^0 C) = \dfrac{1.85 \times 10^3 \ J }{ 41 g \times 0.903 \ J/g^0 C}}[/tex]
[tex]\mathbf{(x - 25 ^0 C) = 49.97^0 C}}[/tex]
[tex]\mathbf{x = 49.97^0 C+25 ^0 C}}[/tex]
x = 74.97 °C
Learn more about specific heat here:
https://brainly.com/question/1430612
How many moles are in 1.204x10^24 atoms of a gas?
Please help!
1.999 mol gas
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Using Dimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Explanation:Step 1: Define
1.204 × 10²⁴ atoms gas
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
Set up: [tex]\displaystyle 1.204 \cdot 10^{24} \ atoms \ gas(\frac{1 \ mol \ gas}{6.022 \cdot 10^{23} \ atoms \ gas})[/tex]Multiply/Divide: [tex]\displaystyle 1.99934 \ moles \ gas[/tex]Step 4: Check
Follow sig fig rules and round. We are given 4 sig figs.
1.99934 mol gas ≈ 1.999 mol gas
how does a diaphragm help in viewing the specimen in a microscope
Answer:
Diaphragm controls the amount of light reaching the specimen. It is located above the condenser and below the stage. Most high quality microscopes include an Abbe condenser with an iris diaphragm. Combined, they control both the focus and quantity of light applied to the specimen.
What isotope of carbon is radioactive:
A) Carbon-12
B) Carbon-13
C) Carbon-14
D) Carbon-13 and Carbon-14
The chemical equation below shows the photosynthesis reaction.
6CO2 + 6H2O → C6H12O6 + 6O2
A reaction uses 528 g of CO2. How many grams of water are used in this reaction?
Answer:
12
Explanation:
The abnormally high boiling point of HF as compared to HCl is primarily due to intermolecular forces of attraction called
A) network bonds
B) electrovalent forces
C) hydrogen bonds
D) van der Waals forces
Answer:
C) hydrogen bonds
Explanation:
The abnormally high boiling point of HF compared to HCl is primarily due to the intermolecular forces called hydrogen bonds.
Hydrogen bonds are intermolecular forces of attraction between polar molecules in which a hydrogen atom is directly joined to a highly electronegative atom (oxygen, nitrogen or fluorine).
Hydrogen bonds are very strong force of attraction compared to dipole - dipole attraction that holds the HCl together.
A 10.0 g sample of a hydrate was heated until all the water was driven off. The mass of the anhydrous product remaining was 8.00 grams. What is the percent of water in the hydrate?
Answer:
20%
Explanation:
10.0 = 100%
8.00 = 80%
100-80= 20
How the calculation of the [OH-], pH and % ionization for 0.619 M ammonia (NH3) NH3 + H2O (liq) rightwards harpoon over leftwards harpoon NH4+ + OH- Kb = 1.8 x 10-5
Answer:
[OH⁻] = 3.34x10⁻³M; Percent ionization = 0.54%; pH = 11.52
Explanation:
Kb of the reaction:
NH3 + H2O(l) ⇄ NH4+ + OH-
Is:
Kb = 1.8x10⁻⁵ = [NH₄⁺] [OH⁻] / [NH₃]
As all NH₄⁺ and OH⁻ comes from the same source we can write:
[NH₄⁺] = [OH⁻] = X
And as [NH₃] = 0.619M
1.8x10⁻⁵ = [X] [X] / [0.619M]
1.11x10⁻⁵ = X²
3.34x10⁻³ = X = [NH₄⁺] = [OH⁻]
[OH⁻] = 3.34x10⁻³M% ionization:
[NH₄⁺] / [NH₃] * 100 = 3.34x10⁻³M / 0.619M * 100 = 0.54%
pH:
As pOH = -log [OH-]
pOH = 2.48
pH = 14 - pOH
pH = 11.52Much of the thermal energy within the Earth comes from atoms that decay. What is another major source of thermal energy within the
Earth?
A. gravitational energy left over from the formation of the Earth
B. thermal energy from the decay of dead plants and animals
c. thermal energy trapped by clouds and water vapor in the atmosphere
D. thermal energy absorbed by the Sun at the Earth's crust
Geothermal energy is heat produced by the Earth itself. It is a resource that may be gathered for human use and is renewable.
The correct option is (D) Thermal energy absorbed by the Sun at the Earth's crust
The friction and gravitational attraction that were produced when Earth was formed more than 4 billion years ago provide a modest amount of the core's heat. The continual production of heat on Earth, however, is mostly caused by the decay of radioactive isotopes like potassium-40 and thorium-232. From the surface to the core, the temperature of Earth increases with depth. The geothermal gradient is the term used to describe this progressive temperature variation. Rock that has partially melted is known as magma, which is gas- and bubble-filled. The lower crust and mantle both contain magma, which occasionally bubbles to the surface as lava.Nearby rocks and subsurface aquifers are heated by magma. Geysers, hot springs, steam vents, undersea hydrothermal vents, and mud pots are among ways that hot water can be emitted.They are all powered by geothermal energy. Their heat may be captured and used directly for heating, or their steam can be used to generate electricity.Learn more about the Geothermal energy with the help of the given link:
https://brainly.com/question/1061324
#SPJ1
The role of an organism in its habitat
A. host
B. prey
C. niche
D. adaptation
Answer:
C. Niche
Explanation:
The role of an organism in it's habitat is it's niche.
Which element is most similar to fluorine in the way it reacts with other elements?
Answer:
The answer is chlorine
Explanation:
What is the percentage composition for H2O in this compound Al(OH)3.2H2O?
a
50.55%
b
40.05%
c
32.73 %
d
65.09%
Answer:
32.73%
Explanation:
To solve this problem, first find the molar mass of Al(OH)₃.2H₂O
Atomic mass of Al = 27g/mol
O = 16g/mol
H = 1g/mol
Molar mass = 27 + 3(16 + 1) + 2(2(1) + 16)
= 27 + 51 + 36
= 114g/mol
Percentage composition = [tex]\frac{36}{114}[/tex] x 100 = 32.73%
Due to the lower pressure on top of Mt. Everest, water can
boil before the temperature gets to 100°C. If pure water
begins to boil at 70°C on Mt. Everest, what is this
temperature in kelvins?
Select one:
a.273 K
b.163 K
c.343 K
d.373 K
I need help working these
Answer:
1) 7.80 X 10^22[tex]\frac{1}{6.02*10^{23} }[/tex] = .13
2) 5.6 [tex]\frac{6.02*10^{23} }{1}[/tex] = 3.4 X 10^24
3)3.81 [tex]\frac{1}{74.55}[/tex] X [tex]\frac{6.02*10^{23} }{1}[/tex] = 3.08 X 10^22
4) 399.91 [tex]\frac{4.05*10^{23} }{6.02*10^{23} }[/tex] = 269
5)4.32 [tex]\frac{1}{18.01}[/tex] X [tex]\frac{22.4}{1}[/tex] = 5.37
Explanation:
For 2 the correct answer is 3.4 instead of 3.2. The 3.4 is rounded from 3.37. Sadly I couldn't figure out the bonus.
A. Airplanes typically fly at an altitude of about 10,000 meters. At this altitude the atmospheric pressure is significantly less than it is at sea-level. Because of this, airplane cabins must be pressurized so that the people on board can continue to get enough oxygen. If a typical 747 has a volume of 28,000 m3 and is filled with air at 101.3 kPa on the ground, what is the new volume of air inside when the cabin is pressurized to 75 kPa once it is in flight? b. Twinkies are made up of 68% air. If you buy a Twinkie in the airport and take it with you on a plane ride, how would its size change during the flight?
Answer:
The new volume of the air inside when the cabin is pressurized to 75 kPa is 37818.[tex]\overline 6[/tex] m³
Explanation:
The given 747 airplane parameters are;
The volume of air in the airplane, V₁ = 28,000 m³
The pressure of the air on the ground, P₁ = 101.3 kPa
The pressure of the air once it is in flight, P₂ = 75 kPa
Let V₂ represent the new volume of the air inside when the cabin is pressurized to 75 kPa
Boyle's Law states that the pressure of a given mass of air is inversely proportional to its volume at constant temperature
Therefore, by Boyle's law, we have;
P ∝ 1/V and P₁·V₁ = P₂·V₂
Which gives;
V₂ = P₁·V₁/P₂
Substituting the known values, we get;
V₂ = 101.3 kPa × 28,000 m³/(75 kPa) = 37818.[tex]\overline 6[/tex] m³
The new volume of the air inside when the cabin is pressurized to 75 kPa = V₂ = 37818.[tex]\overline 6[/tex] m³.
Why do scientists use the scientific method?
Answer:
I think that the first one is right(A)
define pH ?
do it fast , okay
Answer:
pH is a measure of how acidic/basic water is. The range goes from 0 to 14, with 7 being neutral.
13. What is the charge of an aluminum ion that has 13 protons and 10 electrons?
Answer:
+ 3
Ex planation:
Al3+ indicates an ion of aluminum having a charge of + 3. I.e., since an aluminum atom normally has 13 protons and 13 electrons, this ion has 10 electrons (-10 charge) and 13 protons (+ 13 charge) giving it a charge of + 3 (-10 + 13 = +3).
hope this helps!
The expression 1223 ÷ r can be used to find how many batches Tyra can make with the sugar she has. If r is 23 cup, how many batches of cookies can Tyra make?
Answer:
Tyra can make 53 batches
Explanation:
Given
[tex]Batches = \frac{1223}{r}[/tex]
Required
Find the number of batches when r = 23
To do this, we simply substitute 23 for r in [tex]Batches = \frac{1223}{r}[/tex]
So, we have:
[tex]Batches = \frac{1223}{23}[/tex]
[tex]Batches = 53.17[/tex]
Approximate:
[tex]Batches = 53[/tex]
A closed container is the best way to measure the volume of a
A. gas
B. liquid
C. solid
D. Both A and B are correct.
Answer:
A closed container is the best way to measure the volume of a liquid
PLS HELP THIS IS DUE TODAY!!
Answer:
I think it would be Yellow
number of atoms in 10090 g Ne (PLEASE HELP!!)
Answer:
3012.51×10²³ atoms of Ne
Explanation:
Given data:
Mass of Ne = 10090 g
Number of atoms = ?
Solution;
Formula:
Number of moles = mass/ molar mass
Molar mass of Ne = 20.17 g/mol
Number of moles = 10090 g/ 20.17 g/mol
Number of moles = 500.25 mol
Number of atoms:
1 mole contain 6.022×10²³ atoms
500.25 mol × 6.022×10²³ atoms / 1 mol
3012.51×10²³ atoms
Bertie instructs his butler, Jeeves, to make him 40g of calcium oxide (CaO). How much CaCO3 does Jeeves need to find?
Answer:
The amount of CaCO₃ Jeeves needs to find is approximately 71.392 grams
Explanation:
The given parameters are;
The mass of the CaO required = 40 g
The chemical reaction for the production of CaO from CaCO₃ is given as follows;
CaCO₃(s) → CaO(s) + CO₂(g)
Therefore, 1 mole of CaCO₃ produces 1 mole of CaO and 1 mole of CO₂,
The molar mass of CaO = 56.0774 g/mol
Number of moles, n = Mass/(Molar mass)
The number of moles of CaO = 40 g/(56.0774 g/mol) ≈ 0.7133 moles of CaO
Therefore, given that 1 mole of CaO is produced from 1 mole of CaCO₃ 0.7133 moles of CaO will be produced from 0.7133 moles of CaCO₃
The molar mass of CaCO₃ = 100.0869 g/mol
Mass = The number of moles × The molar mass
∴ The mass of CaCO₃ Jeeves needs to find = 0.7133 moles × 100.0869 g/mol ≈ 71.392 g
The mass of CaCO₃ Jeeves needs to find ≈ 71.392 grams.
A sample of methane gas collcted t a pressure of 0.0884 atm and a temperature of 6.00 C is found to occupy a volume of 26.5 L. How many moles of CH4 gas are in the sample? ____ mol
Answer:
0.1mole
Explanation:
Given parameters:
Pressure = 0.0884atm
Temperature = 6°C = 6 + 273 = 279K
Volume occupied = 26.5L
Unknown:
Number of moles = ?
Solution:
To solve this problem, we are going to use the ideal gas equation:
PV = nRT
P is the pressure
V is the volume
n is the number of moles
R is the gas constant = 0.082atmLmol⁻¹k⁻¹
T is the temperature.
Insert the parameters and solve for n;
0.084 x 26.5 = n x 0.082 x 279
n = 0.1mole
how many moles are represented by 3.01x10^23 helium atoms
a. 1 mole
b. 0.50 moles
c. 0.75 moles
d. 5 moles
Answer:
b. 0.50 moles
Explanation:
To solve this problem we use Avogadro's number (6.023x10²³ atoms/mol).
By dividing the number of atoms (or molecules) by that number, we can calculate how many moles they represent.
3.01x10²³ atoms ÷ 6.023x10²³ atoms/mol = 0.50 molesSo the answer is option b. 0.50 moles.
Number 2 & 3 please !!<3
Answer:just for the ponits
Explanation:ima be a jenna
1.which electromagnetic wave has the; longest wavelength, lowest speed, highest frequency, and greatest energy ?
2. Which visible light wave has the; longest wavelength, lowest speed, highest frequency, and greatest energy?
(Please Help I would gladly appreciate it 100 points will be given)