AutoChina Shanghai 2013 also plays host to the world debut of the latest Bespoke Collection from the world’s pinnacle super-luxury marque.
The Alpine Trial Centenary Collection celebrates an extraordinary moment in Rolls-Royce and automotive history. A century ago this June, four Rolls-Royce Silver Ghosts embarked on the Austrian Alpine Trials, the most arduous test of automotive endurance of the time.
In performing without fault over 1820 gruelling miles of near impassable mountain terrain, the Rolls-Royce works team and privateer entrant James Radley helped cement the marque’s reputation for peerless reliability and mechanical excellence, a reputation the company proudly retains today. In doing so establishing the legend of Rolls-Royce as maker of the ‘Best Car in the World’.
This limited edition of Rolls-Royce Ghosts feature exquisitely crafted design cues that pay tribute to these extraordinary motor cars. The exterior paint hue, for example takes close inspiration from Radley’s Silver Ghost, a car that stands side-by-side with the 2013 model in Shanghai.
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Which ecosystem is most resilient to change due to its high diversity?
mountain meadow
stormwater pond
coral reef
arctic tundra
stormwater pond .............
Coral reefs are believed to be the most diverse of any ecosystem. Hence it is most resilient to change due to its high diversity. Thus, option c is correct.
What are coral reefs ?Coral reefs are sometimes referred to as the "rainforests of the sea" due to the richness of life that can be found there. The health of coral reefs is essential for around 25% of the ocean's fish. In the many crevices created by corals, fish and other species find shelter, food, breed, and raise their young.
More than 7,000 different kinds of fish, invertebrates, plants, sea turtles, birds, and marine mammals may be found here. Coral reefs offer chances for recreation, serve as a barrier against erosion and storm damage, and support local economies. They are also a source of fresh medications and food.
More than 500 million people rely on reefs for safety, income, and food. On and around reefs, fishing, diving, and snorkeling generate hundreds of millions of dollars for nearby businesses. Hence, option c is correct.
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on analysis an ammonium salt of an alkanoic acid gave 60.5% C and 6.5% H if 0.309g of the salt yield 0.0313g of Nitrogen determine the empirical formula of the salt [ H = 1, C =12, N = 14, O= 16]
Answer: C7H9NO2
Explanation:
%N = 0.0313/0.309 x 100
= 10.1%
%0 = 100 — (60.5 + 6.5 + 10.1)
= 22.9
C; 60.5/12 H; 6.5/1 N; 10.1/14 O; 22.9/16
C; 5.04/0.72 H; 6.5/0.72 N; 0.72/0.72 O; 1.43/0.72
Empirical formula — C7H9NO2
A 1 mL sample weighs 4 g, the density of the sample is
Which of the following is a redox reaction?
A. CuO + H2SO4 → CuSO4 + H2O
B. 3MnO2 + 4A1 3Mn + 2A120,
C. MgCO, → MgO + CO2
D. Mg(OH)2 + 2HCl → MgCl2 +H20
Answer:
a
Explanation:
the answer to the question is a
Among the following chemical equations, redox reaction is [tex]3 MnO_2+4 Al\rightarrow 3 Mn +2 Al_2O[/tex].
The redox reaction can be defined as a reaction that involves the transfer of electrons between two species. Redox reactions comprise of two parts a reduced part and an oxidized part, which occur simultaneously . The part which is reduced gain electrons and hence there is a increase in oxidation state of the species.
While, the part which is oxidized looses electrons and hence there is a decrease in oxidation state of the species.During redox reactions, there is no net change in the number of electrons . Electrons which are given off in oxidation are used up in reduction.
Therefore, the correct option is B.
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Which statement describes the movement of the medium by a transverse wave?
A. at an obtuse angle to the wave
B. parallel to the wave
C. at a right angle to the wave
D. at an acute angle to the wave
Answer:
A
Explanation:
But I'm not sure just my instinct
The statement that described the movement of the medium via the transverse wave should be that it should be parallel to the wave.
What is a transverse wave?It is the waves in which the motion considered all the points that should be on the wave oscillate along the paths at the right angles with respect to the wave of the direction. An example of this kind of wave should be electromagnetic, etc. Here, the movement should be parallel to the wave.
Hence, the correct option is b.
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what does the picture depict about ecology?
According to the tow of conservation of matter, we know that the total number of atoms does not change in a chemical reaction and thus mas is conserved This
is part of a chemical reaction hydrogen plus orygon yobis water Can you complete this moder? Reorganize the reactants in order to complete the productie
of the reaction
Your answer:
Answer:
no sé de eso perdón necesito los puntos
A 508-g sample of sodium bicarbonate (NaHCO3) contains how many moles of sodium bicarbonate (NaHCO3)?
molar mass = (22.99) + (1.01) + (12.01) + 3(16.00)
molar mass = 84.01 g/mol
//
(508g)(1 mol/84.01 g) = 6.0
There are 6.0 moles of sodium bicarbonate
A 508-g sample of sodium bicarbonate (NaHCO3) contains 0.6 moles of sodium bicarbonate (NaHCO3)
What is mass?Mass is defined as a dimensionless quantity representing the amount of matter in a particle or object. The SI unit of mass is kg.
Mole is defined as a standard scientific unit for measuring large quantities of very small entities
Molar mass = 22.99 + 1.01 + 12.01 + 3x16.00
= 84.01 g/mole
Moles of NaHCO3
= 508 g x 1 mole / 84.01
= 6.0 moles
Thus, 508-g sample of sodium bicarbonate (NaHCO3) contains 0.6 moles of sodium bicarbonate (NaHCO3)
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A fat is composed, in part, of long chains of carbon and hydrogen. This fat as a molecular
mass of 847 grams/mole and an empirical formula of C9H170. Determine the molecular
formula.
Answer:
[tex]C_{54}H_{102}O_6[/tex]
Explanation:
Hello!
In this case, since the molar mass of the empirical formula is:
[tex]MM_{empircal}=9*12.01+17*1.01+16.00=141.26g/mol[/tex]
Thus, the ratio of the molecular to the empirical formula is:
[tex]\frac{847g/mol}{141.26g/mol} =6.0[/tex]
Thus, the molecular formula is six times the empirical formula:
[tex]C_{54}H_{102}O_6[/tex]
Best regards!
Which of the following statements best goes with the Law of Conservation of Energy?
all energy conversions are 100% efficient
O all energy from the sun is transferred to organisms directly by the 10% rule
O all of the sun's energy is either transformed into kinetic energy, and eventually heat energy
O all matter cannot be created or destroyed
Answer:
all letter cannot be created or destroyed just transformed
one reaction that produces hydrogen gas can be represented by the unbalanced chemical equation Mg(s)+HCI(aq) -> MgCI(aq)+H2(g). What is the mass of HCI is consumed by the reaction of 3.25 mol of magnesium?
128 g HCl
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableStoichiometry
Reaction Mole RatiosUsing Dimensional AnalysisExplanation:Step 1: Define
[RxN - Unbalanced] Mg (s) + HCl (aq) → MgCl (aq) + H₂ (g)
↓
[RxN - Balanced] 2Mg (s) + 2HCl (aq) → 2MgCl (aq) + H₂ (g)
[Given] 3.25 mol Mg
[Solve] x g HCl
Step 2: Identify Conversions
[RxN] 2 mol Mg → 2 mol HCl
[PT] Molar Mass of H - 1.01 g/mol
[PT] Molar Mass of Cl - 35.45 g/mol
Molar Mass of HCl - 1.01 + 35.45 = 36.46 g/mol
Step 3: Stoich
[S - DA] Set up: [tex]\displaystyle 3.25 \ mol \ Mg(\frac{2 \ mol \ HCl}{2 \ mol \ Mg})(\frac{36.46 \ g \ HCl}{1 \ mol \ HCl})[/tex][S - DA] Multiply/Divide [Cancel out units]: [tex]\displaystyle 127.61 \ g \ HCl[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
127.61 g HCl ≈ 128 g HCl
Can you locate any mountains in the tropical zones?
Answer:
At even lower levels mountain lands grade into other types of landform and vegetation—e.g., tropical or temperate forest, savanna, scrubland, desert, or tundra. The largest and highest area of mountain lands occurs in the Himalaya -Tibet region; the longest nearly continuous mountain range is that along the west coast of the Americas from Alaska in the north to Chile in the south.
eh-
Explanation:
Which of the following is true?
A)If we know that a reaction is an elementary reaction, then we know its rate law.
B)The rate-determining step of a reaction is the rate of the fastest elementary step of its mechanism.
C)Since intermediate compounds can be formed, the chemical equations for the elementary reactions in a multistep mechanism do not always have to add to give the chemical equation of the overall process.
D)In a reaction mechanism, an intermediate is identical to an activated complex.
E)all of these statements are true.
Answer:
If we know that a reaction is an elementary reaction, then we know its rate law.
Explanation:
An elementary reaction is a reaction that takes place in one reactive encounter. This means that the two species interact in a single step to give the products.
If two reactants interact in a single step to yield the products then we can easily deduce the rate law from the reaction equation.
For instance, For the reaction;
2A + B → C
The rate law is
rate = k[A]²[B].
If the reaction is an elementary reaction and the equation of the reaction is balanced, then we can deduce the rate law from the balanced reaction equation.
Describe the process for the separation of water and water soluble matter.
Sive an important difference of each of the following pair.
Solid and liquid
b. Liquid and gas
Solid and gas
d. Melting and freezing
Vapourization and condensation. f. Melting and sublimation.
Filtration and evaporation, 1. Sedimentation and decantation,
Homogeneous and heterogenous mixture
Water insoluble and water soluble matter
Write T for true and F for false statements.
All matters are visible.
Air is a matter.
The tiny particles of matter are called molecule.
தங்கம்
Answer:
Describe the process for the separation of water and water soluble matter.
Sive an important difference of each of the following pair.
Solid and liquid
b. Liquid and gas
Solid and gas
d. Melting and freezing
Vapourization and condensation. f. Melting and sublimation.
Filtration and evaporation, 1. Sedimentation and decantation,
Homogeneous and heterogenous mixture
Water insoluble and water soluble matter
Write T for true and F for false statements.
All matters are visible.
Air is a matter.
The tiny particles of matter are called molecule.
தங்கம்
An allergy medicine is usually stored in a cabinet at room termperature where its molecules move around each other. By
mistake, an intern transferred energy into the medicine. After one hour, the intern found the medicine and noticed that it
was a liquid. How were the molecules moving when the intern found the medicine? Explain why the molecules were
moving this way after the intern transferred energy ito the medicine.
Answer:
hello, can you pleas egive me the answer? i have the same exact question. thank you!
Explanation:
The image shown here is a good illustration of which law?
Answer:
The answer is A.Newton's First law
What would be the structural formula for sodium fluoride? (NaF)
Answer:
Formula and structure: The chemical formula of sodium fluoride is NaF and its molar mass is 41.99 g/mol. It is a simple ionic compound, made of the sodium (Na +) cation and fluoride (F -) anion. The solid salt exists as cubic crystals similar to the crystal structure of sodium chloride (NaCl).
Explanation:
The mass of a dust particle would be measured in?
If potassium reacts so dangerously with water, and people are mostly made of water, why can we eat bananas without blowing up?
Answer:
A banana, like most other lifeforms, is about 70% water, and all the potassium it contains already exists in the form of K+ ions dissolved in water. Which is why bananas do not explode in water, or spontaneously combust.
WRITE A 3-4 SENTENCE SUMMARY ABOUT ATOMS.
Answer:
An atom is the smallest unit of matter that retains all of the chemical properties of an element. Atoms combine to form molecules, which then interact to form solids, gases, or liquids. For example, water is composed of hydrogen and oxygen atoms that have combined to form water molecules.
Explanation:
Answer:
Atom is the smallest particle in the universe. An atom is made up of sub-atomic particles. They are the protons (positively charged particle), electrons (negatively charged particles) and neutrons neutrally charged particles). The lightest atom ever known is Hydrogen atom. An atom is electrically neutral. When a atom looses or gains and electrons it is called an ions.
The three temperate marine climates are?
Marine west coast, humid subtropical, and Mediterranean.
Which is an acceptable Lewis structure for a diatomic nitrogen molecule?
OA NEN
OB.
N
N
O C.
:N
N:
OD.
NEN
OENEN
Answer:
:N:::N:
Explanation: 10 valence electrons betwwen the 2
need an octet
and N needs 5 for a neutral formal charge
An acceptable Lewis structure for a diatomic nitrogen molecule is
:N:::N: .Option C is correct. This is further explained below.
What is Lewis structure for a diatomic nitrogen molecule?Lewis structure for a diatomic nitrogen molecule simply refers to the triple bond exists between two nitrogen atoms in the N2 Lewis structure.
In conclusion, The nitrogen molecule is diatomic, which means it is made up of two atoms of the same element.
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What are simple sugars
Answer:
Simple sugars are a type of carbohydrate.
Explanation:
Carbohydrates are one of the three basic macronutrients — the other two being protein and fat. Simple sugars are found naturally in fruits and milk, or they can be produced commercially and added to foods to sweeten, prevent spoilage, or improve structure and texture.
g When water and perchloric acid (HClO4) are mixed, heat is released. The resulting solution is not an ideal solution, in terms of Raoult’s Law. How should the boiling point and the vapor pressure of a solution of HClO4 in H2O differ from what is expected for an ideal solution? A) boiling point higher than expected, vapor pressure lower than expected B) boiling point higher than expected, vapor pressure higher than expected C) boiling point lower than expected, vapor pressure lower than expected D) boiling point lower than expected, vapor pressure higher than expected E) boiling point and vapor pressure are both the same as expected for an ideal solution
Answer:
A) boiling point higher than expected vapor pressure lower than expected.
Explanation:
When water is introduced with heat it vaporize at a temperature of 100 degree centigrade. When hydrochloric acid is added to the water its boiling point of water increases slightly. The difference in the boiling point is due to the presence of heavier molecules in acid.
analyze how animals benefit from the process of photosynthesis in plants
Answer:
Animals benefit from photosynthesis, because they consume the plants and therefore the sugars stored in the plants from the process of photosynthesis for energy
Explanation:
In an experiment, 20cm^3 of 0.2dm^3 NaOH reacted with 32.0cm^3 of H2SO4 solution. Calculate the concentration of the H2SO4 in a) mol dm^-3 and b) g dm^-3
Answer:
A. 0.0625 moldm¯³
B. 6.125 gdm¯³
Explanation:
We'll begin by writing the balanced equation balance equation for the reaction. This is illustrated below:
2NaOH + H₂SO₄ —> Na₂SO₄ + 2H₂O
From the balanced equation above,
The mole ratio of the acid, H₂SO₄ (nₐ) = 1
The mole ratio of the base, NaOH (n₆) = 2
A. Determination of the concentration of the acid in moldm¯³.
Volume of base, NaOH (V₆) = 20 cm³
Concentration of base, NaOH (C₆) = 0.2 moldm¯³
Volume of acid, H₂SO₄ (Vₐ) = 32 cm³
The mole ratio of the acid, H₂SO₄ (nₐ) = 1
The mole ratio of the base, NaOH (n₆) = 2
Concentration of acid, H₂SO₄ (Cₐ) =?
CₐVₐ / C₆V₆ = nₐ / n₆
Cₐ × 32 / 0.2 × 20 = 1 / 2
Cₐ × 32 / 4 = 1 / 2
Cross multiply
Cₐ × 32 × 2 = 4 × 1
Cₐ × 64 = 4
Divide both side by 64
Cₐ = 4 / 64
Cₐ = 0.0625 moldm¯³
Therefore, concentration of the acid in moldm¯³ is 0.0625 moldm¯³
B. Determination of the concentration of the acid in gdm¯³.
Concentration (moldm¯³) = 0.0625 moldm¯³
Concentration (gdm¯³) =?
Next, we shall determine the molar mass of the acid, H₂SO₄. This can be obtained as follow:
Molar mass of H₂SO₄ = (2×1) + 32 + (4×16)
= 2 + 32 + 98
= 98 g/mol
Finally, we shall determine the concentration of the acid in gdm¯³. This can be obtained as follow:
Concentration (moldm¯³) = 0.0625 moldm¯³
Molar mass of H₂SO₄ = 98 g/mol
Concentration (gdm¯³) =?
Conc. (moldm¯³) = conc. (gdm¯³) / Molar mass
0.0625 = Conc. (gdm¯³) / 98
Cross multiply
Conc. (gdm¯³) = 0.0625 × 98
Conc. (gdm¯³) = 6.125 gdm¯³
Thus, the concentration of the acid in gdm¯³ is 6.125 gdm¯³
What is geberal formula for alkane?
Answer:
CnH2n+2
Explanation:
Alkane have double and two atoms of hydrogen than carbon atoms
Like C4H10
n = 4
CnH2n+2
C4H2×4+2
C4H10
How can weak acids and weak bases cause pH stress to cells?
a. Weak bases will only cause pH stress at low pH.
b. If a cell has transporters that are not well regulated, weak acids or weak bases can accumulate inside the cells and cause stress.
c. Only weak acids can cause stress by diffusing across a membrane at low pH.
d. At certain pH levels, both weak acids or weak bases will be uncharged, and thus are small uncharged molecules that can diffuse across a membrane and cause pH stress inside the cell. e. Weak acids and weak bases do not cause stress.
Answer:
b
Explanation:
If a cell has transporters that are not well regulated, weak acids or weak bases can accumulate inside the cells and cause stress.
When two substances combine to form a mixture, the properties of the substances change. True False
Answer:
Tell students that sometimes when two (or more) substances are mixed together, a change occurs and another substance (or substances) is created. This is called a chemical reaction. Gas may form, heat may be produced, and color may change. These types of changes indicate that a chemical reaction has occurred.
what is the purpose of sand bath in preparation of ethane
Answer:
The sand bath spreads the heat out so that the flask is heated evenly. This reduces the chance of the flask breaking and ensures that there are no hot spots in the reaction mixture which could lead to excessive charring,
Explanation: