Answer:
13.33 g/dm³
Explanation:
Concentration (g/dm³)= mass(g) ÷ volume (dm³)
Now you need to convert 150 cm³ to dm³
1000cm³ = 1 dm³
thus, 150 cm3= 150 ÷ 1000
= 15dm³
and you already have mass in grams
so concentration = 2 ÷ 0.15
= 13.33 g/dm³ and there you go.. solved ;)
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:
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)
How many atoms are in 6.3 moles of lead
Answer:
3.79 x 10²⁴atoms
Explanation:
Given parameters:
Number moles of lead = 6.3moles
Unknown:
Number of atoms = ?
Solution:
To solve this problem,
1 mole of a substance contains 6.02 x 10²³ atoms
6.3 mole of Pb will contain 6.3 x 6.02 x 10²³ = 3.79 x 10²⁴atoms
________is the base unit for length in the metric system
Answer:
metric system
Explanation:
In the metric system, the basic unit of length is the meter. A meter is slightly larger than a yardstick, or just over three feet. The basic metric unit of mass is the gram. Finally, the basic metric unit of volume is the liter.
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
24. What type of cloud is in the picture?
cumulus
cirrus
altostratus
stratus
Explanation:
alto cumulus is the pic
Which element is most similar to fluorine in the way it reacts with other elements?
Answer:
The answer is chlorine
Explanation:
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
What are the half-reactions for a galvanic cell with aluminum and gold
electrodes?
Answer:
A
Explanation:
In a galvanic cell, energy is produced by spontaneous chemical processes.
The cathode and anode of this cell will depend on the relative position of the two metals in the electrochemical series.
Aluminium is higher in the electrochemical series so aluminium will be the anode. Silver is lower in the electrochemical series so silver will be the cathode.
Recall that oxidation (electron loss) occurs at the anode while reduction (electron gain) occurs at the cathode.
The half-reactions for the galvanic cell with aluminum and gold electrodes is [tex]\mathbf{Al_{(s)}\to Al^{3+} _{(aq) } + 3e^- \ and \ Au^+_{(aq)} +e^- \to Au_{(s)}}[/tex]
Galvanic cells are electrochemical cells that generate electrical energy by the spontaneous activity in the oxidation-reduction (redox) reaction process.
The position of the metals if they are going to be at the cathode or at the anode relatively depends on the position with which they find themselves in the electrochemical series. The higher metal will be the anode and the lower metal in the electrochemical series will be the cathode.
Since aluminum is higher than gold on the electrochemical series, then:
Aluminum = anode (oxidation of aluminum from solid to aqueous state)Gold = cathode (reduction of gold from aqueous to solid-state)Therefore, the half-reactions for the galvanic cell with aluminum and gold electrodes is [tex]\mathbf{Al_{(s)}\to Al^{3+} _{(aq) } + 3e^- \ and \ Au^+_{(aq)} +e^- \to Au_{(s)}}[/tex]
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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
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 = 11.52The 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]
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.
How many formula units are in 2.58 moles of Caci.?
Answer:
1.55 x 10²⁴ formula units
Explanation:
Given parameters:
Number of moles of CaCl₂ = 2.58moles
Unknown:
Formula units in the compound = ?
Solution:
To solve this problem, we must understand that;
1 mole of a substance contains 6.02 x 10²³ formula units
2.58 moles will contain 2.58 x 6.02 x 10²³ formula units
= 1.55 x 10²⁴ formula units
Here is a model that shows key information about Earth
and the Sun
Direction of
Earth's rotation
Axis
Which statement best explains the pattern of daytime and nighttime on
Earth?
A. The Sun must revolve around Earth once every 24 hours
B. Earth's axis of rotation must tilt back and forth every 12 hours.
C. Earth must complete one rotation on its axis every 24 hours.
D. The Sun's energy must come from a different direction every 12
hours
The statement information about earth and the sun direction of earth's rotation axis best explains the pattern of daytime and night-time on earth is " earth must complete one rotation on its axis every 24 hours".
What is sun?The sun was composed of incredibly hot gases, as well as then it heats as well as illuminates the entire solar system.
What is earth?The earth was referred to as a "one-of-a-kind" planet since that is the only one on the planet with ideal circumstances for life.
Day though night are caused by the Earth's diurnal revolution. From west to east, the earth rotates on its axis for around 24 hours. As a result, the sun appears to rotate from east to west, resulting in sunset and sunrise. except for polar is, which remains stationary in the north polar sky along the earth's axis, all those other stars move from east to west.
Therefore, the correct answer will be C.
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Answer:
THE ANSWER IS (C.)
Explanation:
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
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
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Describe the relationship between an enzyme, substrate, and active site.
pleaseee help haha im timed
Answer: aerobic respiration converts about 40% of the available energy of glucose into ATP!!!
Number 2 & 3 please !!<3
Answer:just for the ponits
Explanation:ima be a jenna
3. Count the number of hydrogen atoms in 2 molecules of vitamin C (2c6H8O6
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
Complete the three words. The oxidation state tells you how many electrons an atom has g....................... , l......................... , or s......................... , in forming a compound.
Answer:Gained, Lost , Shared
Explanation:
The oxidation state tells you how many electrons an atom has GAINED.................. , LOST....................... , or SHARED........................ , in forming a compound.
Oxidation state is defined as the the total number of electrons that an atom gains or loses when forming a chemical bond with another atom.
----To form an ionic bond for example in NaCl, Na, with 11 electrons and one valence electron in its outermost shell donates or lose that valence electron to Chlorine with 17 electron and 7 in its outermost shell. Therefore Sodium, Na acquires the +1 oxidaton state to become stable and Chlorine acquires the -1 oxidation state to become stable forming the NaCl compound.
To form a covalent compound, There must be sharing of electrons between atoms.For example, in PCl3, The phosphorous atom with atomic number 15 shares its three unpaired electrons with the single valence electrons of three chlorine atoms. making the four molecules to attain stability with Phosphorous having +3 and the chlorine atoms having -1 oxidation states
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!
A student decides to dissolve crackers in their soup as fast as possible. They must first increase the surface area of the crackers. How could this be done? a.Break the crackers into pieces b.Pile the crackers on top of each other c.Wrap the crackers in plastic to keep them fresh d.Put crackers in the bottom of the bowl
Answer: The correct option is A ( Break the crackers into pieces.)
Explanation:
The rate of reaction between two substances can be affected by the following factors:
--> surface area of reacting substances
--> concentration
--> reaction mechanism
--> temperature
--> the presence of a catalyst and
--> pressure ( if gaseous)
Reagents in solution tend to react faster than reagents in solid form. This is because molecules are freer to move about and collide more effectively in solutions. For example, a lump of zinc will not react as fast as powdered zinc with dilute hydrochloric acid to produce hydrogen. This is the same with the reaction between the crackers and soup. To increase the reaction of the substances, the crackers needs to be broken into pieces(thus,increased surface area)
Much 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:
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Why do scientists use the scientific method?
Answer:
I think that the first one is right(A)
the first stage of an blank is when clouds form; this is the cumulus stage
Answer:
thunderstorm
Explanation: The cumulus stage is the first stage in a thunderstorm and it involves clouds forming. We see the cloud that will become a thunderstorm as it is starting to form and grow. This is due to the rising levels of thermal energy.
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.
how glass tube filed with acidified potassium dichromate detect drunken driver
Answer:
See explanation
Explanation:
The reaction between alcohol and acidified potassium dichromate is a redox reaction. This reaction can be used to detect a drunken driver.
Alcohols can be oxidized to aldehydes, ketones and carboxylic acids depending on the structure of the alcohol. Primary alcohols yield adehydes and carboxylic acids while secondary alcohols are oxidized to ketones.
The colour of the acidified potassium dichromate turns from orange to green when exposed to alcohols from the breath of a drunken driver.