Answers
Answer:
Climate
Explanation:
Related Questions
Aqueous hydrochloric acid (HCI) will react with solid sodium hydroxide (NaOH) to produce aqueous sodium chloride (NaCI) and liquid water (H2O).
Suppose 30.g of hydrochloric acid is mixed with 14.3g of sodium hydroxide. Calculate the maximum mass of sodium chloride that could be produced by the chemical reaction.
Answers
Answer:
Explanation:
The balanced chemical equation for the reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH) is:
HCl(aq) + NaOH(s) → NaCl(aq) + H2O(l)
From the balanced equation, we can see that one mole of hydrochloric acid reacts with one mole of sodium hydroxide to produce one mole of sodium chloride and one mole of water.
First, we need to determine which reactant is limiting, i.e., which reactant is completely consumed in the reaction. To do this, we need to compare the number of moles of each reactant, using their respective molar masses:
Molar mass of HCl = 1.008 g/mol (atomic weight of hydrogen) + 35.45 g/mol (atomic weight of chlorine) = 36.46 g/mol
Molar mass of NaOH = 22.99 g/mol (atomic weight of sodium) + 16.00 g/mol (atomic weight of oxygen) + 1.008 g/mol (atomic weight of hydrogen) = 39.99 g/mol
Number of moles of HCl = mass / molar mass = 30.0 g / 36.46 g/mol ≈ 0.823 mol
Number of moles of NaOH = mass / molar mass = 14.3 g / 39.99 g/mol ≈ 0.358 mol
Since the stoichiometric ratio between HCl and NaOH is 1:1, NaOH is the limiting reactant because it has fewer moles than HCl.
Therefore, we can calculate the maximum mass of NaCl that can be produced by the reaction using the number of moles of NaOH:
Number of moles of NaCl produced = number of moles of NaOH used in the reaction = 0.358 mol
Mass of NaCl produced = number of moles of NaCl produced x molar mass of NaCl
Molar mass of NaCl = 22.99 g/mol (atomic weight of sodium) + 35.45 g/mol (atomic weight of chlorine) = 58.44 g/mol
Mass of NaCl produced = 0.358 mol x 58.44 g/mol = 20.9 g
Therefore, the maximum mass of NaCl that can be produced by the reaction is approximately 20.9 g
Consider the following silica gel TLC plate of compounds A, B, and C developed in hexanes:
Consider the following silica gel TLC plate of com
a) Determine the R f values of compounds A, B, and C run on a silica gel TLC plate using hexanes as the solvent
b) Which compound, A, B, or C, is the most polar?
c) What would you expect to happen to the R f values if you used acetone instead of hexanes as the eluting solvent? (Think polarity of solvents)
Answers
The R f values for compounds A, B, and C on a silica gel TLC plate developed in hexanes would be determined by measuring the distance each compound traveled compared to the distance the solvent traveled.
a) There is a 4 cm gap between the origin and the solvent front. The Rf value for spot A is\(\frac{1.5}{4}= 0.375\), because it travelled 1.5 cm. Due to the 3.5 cm movement of Spot B, its Rf is\(\frac{3.5}{4} = 0.875\). Spot C shifted 3 cm, making its Rf \(\frac{3}{4} = 0.75\).
b)Due to its shorter travel distance than the other two compounds, compound A is the most polar. Recall that polar substances adhere to the adsorbent more readily, move less, and have a lower Rf value.
c)Hexanes is less polar than acetone as a solvent. Each of the three compounds would move more quickly if the same method were employed to elute them.The chemicals can be removed from the polar adsorbent more effectively with a more polar eluting solvent. Each compound would have a higher Rf value if acetone were used to elute the TLC plate as opposed to hexanes because each compound travels more quickly.
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what volume litters of oxygen would be ptoduced in the electrolysis which forms 548 litters of hydrogen both gases measured at stp?
Answers
The ideal gas law may be used to determine the volume of oxygen created in the electrolysis that produces 548 litres of hydrogen at STP (Standard Temperature and Pressure). PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature, according to the ideal gas equation.
The pressure is 1 atm, the temperature is 273 K, and the number of moles of hydrogen is 548/22.4 = 24.5 in this example. We may compute the volume of oxygen created by rearranging the ideal gas law: V = nRT/P = 24.5*0.082*273/1 = 483.3 litres.
As a result, the volume of oxygen created in the electrolysis at STP that produces 548 litres of hydrogen is 483.3 litres.
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A gas occupies a volume of 1.0 L at 25°C. What volume will the gas occupy at 100°C?
A)
4.0 L
B)
0.80 L
C)
1.3 L
D)
1.0 L
Answers
Answer:
A
Explanation:
1.0 L * 4 = 4L volume that the gas can occupy at 100 degree Celsius
In a titration experiment 43.18 mL of 0.283 M KOH is reacted with H2SO4. The endpoint is reached when 44.62 mL of the acid is mixed with the base. What is the molar concentration of the acid?
Answers
The balanced formula of the reaction described is:
\(2KOH_{(aq)}+H_2SO_{4(aq)}→K_2SO_{4(aq)}+2H_2O_{(l)}\)To find the molar concentration (Molarity) of the solution we will follow the following steps:
1. We find the moles of KOH present in the basic solution using the molarity equation that tells us:
\(Molarity=\frac{MolesSolute}{Lsolution}\)\(\begin{gathered} MolesSolute=Molarity\times Lsolution \\ MolesSolute=0.283M\times0.04318L \\ MolesSolute=0.012molKOH \end{gathered}\)2. From the stoichiometry of the reaction we find the moles of H2SO4 needed to neutralize the moles of KOH. The ratio H2SO4 to KOH is 1/2.
\(\begin{gathered} molH_2SO_4=givenmolKOH\times\frac{1molH_2SO_4}{2molKOH} \\ molH_2SO_4=0.012molKOH\times\frac{1molH_{2}SO_{4}}{2molKOH}=0.006molH_2SO_4 \end{gathered}\)3. We find the molarity of the solution using the molarity formulation from point 1.
\(\begin{gathered} Molarity=\frac{MolesSolute}{Lsolution} \\ Molarity=\frac{0.006molH_2SO_4}{0.04462L}=0.137M \end{gathered}\)Answer: The molarity or molar concentration of the acid solution is 0.137M
Which temperature is warmer 0° F or 0°C
Answers
Answer:
0 degree C
Explanation:
0 degree C = 32 degree F
0 degree F = -17.7778 degree C
Answer:
0 degrees C would be warmer
Explanation:
here is the reaction you performed. what is the mechanism? hint: an anhydride behaves very similarly to an acid chloride. use the curved arrow to show the movement of electrons. include all lone pairs. Water was added to destroy any remaining acetic anhydride. What is the product of water and acetic anhydride?
Answers
The reaction you underwent was anhydride. Anhydride behavior is strikingly similar to that of acid chloride. the motion of electrons, use a curving arrow. consist of all lone pairings. Any leftover acetic anhydride was destroyed by the addition of water. the end result of adding water to acetic anhydride.
What is acetic anhydride?
An anhydride functions very much like an acid chloride. electron movement is depicted by the curved arrow. An anhydride functions very much like an acid chloride. the motion of electrons, use a curving arrow. consist of all lone pairings. In a condensation reaction involving the elimination of a water molecule, acetic anhydride is created from two acetic acid molecules.
D and L-structures phenylalanine's are made up of amino acids, which both have amino groups.
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It is not safe to put an aerosol canister in a campfire, because the pressure Inside the can gets very
high at the temperature rises....it can explode! If you have a 1500 milliliter canister that holds 3 moles
of gas, and the campfire temperature reaches 1500 °C, what is the pressure in atmospheres inside the
canister?

Answers
The pressure inside the canister at a campfire temperature of 1500°C is 0.227 atm
Given that the temperature of the campfire is 1500°C, the volume of the aerosol canister is 1500 milliliters, and the number of moles of gas in the canister is 3 moles.The ideal gas equation is given as PV = nRT, where P is pressure, V is volume, n is the number of moles of gas, R is the ideal gas constant, and T is the absolute temperature of the gas in Kelvin.To convert 1500°C to Kelvin, we use the equation: T(K) = T(°C) + 273T(K) = 1500 + 273T(K) = 1773 KSubstitute the values given in the ideal gas equation:P = (nRT) / VWe are given n, R, V, and T, hence we substitute and solve for P as follows:P = (3 × 0.082 × 1773) / 1500P = 0.227 atm.It is not safe to put an aerosol canister in a campfire because the pressure inside the canister will increase at higher temperatures. If the pressure in the canister continues to increase beyond the safe limit, it can explode. Therefore, always keep aerosol canisters away from sources of high temperatures.
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Describe the energy transformations in each:1. When the flashlight is turned on, a flow of electrons is created by the batteries. The electricity passes through the incandescent lightbulb, causing the tungsten filament in the lightbulb to heat up. When the metal is hot enough, photons of light are emitted.
Answers
First, it is the chemical energy because of the batteries, then this energy is transforming to electrical because of the flowing of electrons. Before this, the electrical energy is going to be light energy for the light bulb and finally, we have the heat energy of the light bulb. The order is:
\(\text{Chemical}\to electricity\to light\to heat.\)BRAINLIEST + 20 POINTS
What will occur if two reactant molecules collide but do not have the right alignment?
Answers
Answer:
Contents Home Courses University of California Davis UCD Chem 2C: General Chemistry III UCD Chem 2C: Larsen Text Unit 4: Chemical Kinetics Expand/collapse global location
4.7: Collision Theory
Last updatedSep 3, 2020
4.6: Using Graphs to Determine (Integrated) Rate Laws
4.8: Temperature and Rate
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Learning Objectives
Molecules must collide in order to react.
In order to effectively initiate a reaction, collisions must be sufficiently energetic (kinetic energy) to break chemical bonds; this energy is known as the activation energy.
As the temperature rises, molecules move faster and collide more vigorously, greatly increasing the likelihood of bond breakage upon collision.
Collision theory explains why different reactions occur at different rates, and suggests ways to change the rate of a reaction. Collision theory states that for a chemical reaction to occur, the reacting particles must collide with one another. The rate of the reaction depends on the frequency of collisions. The theory also tells us that reacting particles often collide without reacting. For collisions to be successful, reacting particles must (1) collide with (2) sufficient energy, and (3) with the proper orientation.
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Answer:
It cannot collide as all molecules don't touch each other but if it does i don't know sorry
Explanation:
10. Although lidocaine is marketed as its hydrochloride salt, it doesn’t exhibit the same level of physiological activity as the free amine. The free amine is more lipophilic and diffuses across a neuron cell membrane more rapidly than the ionic salt, resulting in a more rapid onset of anesthesia. Therefore, sodium bicarbonate (NaHCO3) is added to a solution of lidocaine prior to injection. How does the addition of sodium bicarbonate promote a faster anesthetic effect?
Answers
Answer:
Bicarbonate neutralizes the acidity of Lidocaine and hence reduce the pain
Explanation:
Alkalinization by addition of sodium bicarbonate causes buffering of local anesthetics and hence produce faster anesthetic effect such as pain control, pain reduction while injecting the patient and faster onset of local anesthetics.
Lidocaine along with epinephrine results into acidic compound wit respect to subcutaneous tissue. Hence, when bicarbonate is added, it neutralizes the acidity of Lidocaine and hence decrease the pain.
Neha and Reha are playing see-saw. Neha is sitting 60 cm away from the fulcrum and Reha is sitting 40 cm away from the fulcrum. Calculate the effort that Reha should apply to lift Neha. The weight of Neha is 360 N.
Answers
Answer:
Reha should apply 540 N to lift Neha.
Explanation:
L = 360 N
LD = 60 m
E =?
ED = 40m
NOW
L * LD = E * ED
360 *60 = E*40
21600/40 = E
540 N = E
H2SO, is an example of which of the following?
A) Element
B) Compound
C)Noble Gas
D)Mixture
Answers
Answer:
The answer is B.
Explanation:
Its a chemical compound
A scientist studies an element that has seven electrons in its outer shell, is fairly toxic, and is highly reactive. To which group of the periodic table does this element belong
Answers
Answer:17
Explanation:cause i took the test
Answer: Haleybear1006 is right the answer is 17
Explanation: i took the test
The evidence of quantized energy states in atoms comes from
1. photoelectric effect
2. rainbows from prisms
3. oil drop experiment
4. diffraction
5. bright line or emission spectra 6. gold foil experiment
Answers
The evidence for quantized energy states in atoms stems primarily from the photoelectric effect, bright line spectra, and diffraction phenomena. Options 1,4 and 5 are correct.
The evidence of quantized energy states in atoms comes from several experimental observations, which collectively provide a comprehensive understanding of atomic structure and the behavior of electrons within atoms.
One of the key pieces of evidence is the observation of the photoelectric effect (1). When light shines on a metal surface, electrons are ejected from the surface. The observation that electrons are only ejected if the light has a minimum frequency, regardless of its intensity, supports the idea that energy is quantized in discrete packets known as photons.
Another crucial observation is the presence of bright line or emission spectra (5). When atoms are excited, they emit light at specific wavelengths that correspond to distinct energy transitions. These discrete emission lines indicate that electrons can only exist in specific energy levels within an atom, and they transition between these levels by absorbing or emitting photons of precise energy.
The phenomenon of diffraction (4) also provides evidence for quantized energy states. Diffraction occurs when light passes through a narrow slit or encounters a periodic structure. The resulting pattern indicates that light behaves as waves with specific wavelengths. This suggests that the energy of light is quantized and can only exist in certain discrete values.
While rainbows from prisms (2) and the oil drop experiment (3) are not directly related to quantized energy states in atoms, they are important experiments in their own right. Rainbows result from the dispersion of white light into its component colors due to different wavelengths of light bending at different angles. The oil drop experiment explores the behavior of charged oil droplets in an electric field, providing insights into charge quantization.
Lastly, the gold foil experiment, also known as the Rutherford scattering experiment, is significant but not directly related to quantized energy states. It demonstrated that the atom has a small, dense, positively charged nucleus by observing the deflection of alpha particles fired at a thin gold foil.
These experimental observations support the fundamental concept that energy levels in atoms are discrete and that electrons occupy specific energy states within an atom. Options 1,4 and 5 are correct.
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Why do we need to identify matter?
Answers
Answer:
It's important for scientists to know the properties of matter because all things are made up of matter. Each type of matter has different physical characteristics and scientists need to know and understand these characteristics to make calculations. ... The main phases of matter are solid, liquid, and gas
Explanation:
^^
g What is the minimum speed needed by a ground-state hydrogen atom for its kinetic energy to be enough to ionize the atom in a collision
Answers
Let u be velocity of hydrogen atom before collision and V the ve locity of two atoms moving together after collision By principal of conservation of momentum , we have
\(Mu + M \times 0 = 2VM\)
\(V = \frac{u}{2} \\ \)
The loss in kinetic energy Δϵ due to collision is
\(Δϵ= \frac{1}{2}Mu {}^{2} − \frac{1}{2} (2M)V {}^{2} \\ \)
\(As, V = \frac{u}{2} \: we \: have \: Δϵ= \frac{1}{2}Mu {}^{2} − \frac{1}{2} (2M)( \frac{u}{2}) {}^{2} \\ \)
\( = \frac{1}{2} Mu {}^{2} - \frac{1}{4}Mu { }^{2} = \frac{1}{4} Mu {}^{2} \\ \)
Rest answer is in the pic
The __________________variable is the one factor you manipulate or change in the experiment
Answers
The dependent is what you are measuring. The independent is the one thing you are altering so you can carry out your experiment.
How many moles in 5 grams?
Answers
Answer:
The molar mass of atoms of an element is given by the standard relative atomic mass of the element multiplied by the molar mass constant
Explanation:
what mass of water is formed when 2 moles of hydrogen react with 1 mole of oxygen to form water?A. 2 gB. 18.01C. 36.02 D. 9 g
Answers
Answer
C. 36.02
Explanation
Given:
Moles of hydrogen that reacts = 2 mol
Moles of oxygen that reacts = 1 mol
What to find:
The mass of water formed when the moles of hydrogen and oxygen above react.
Solution:
The first step is to write a balanced chemical equation for the reaction to know the mole ratio of H to O
\(2H_2+O_2\rightarrow2H_2O\)The mole ratio of hydrogen to water in the balanced equation is 2:2
The next step is to calculate the mole of water produced from the given moles of H and O using the mole ratio.
\(\begin{gathered} 2mol\text{ }H_2=2mol\text{ }H_2O \\ \\ 2mol\text{ }H_2=x \\ \\ x=\frac{2mol\text{ }H_2}{2mol\text{ }H_2}\times2mol\text{ }H_2O \\ \\ x=2mol\text{ }H_2O \end{gathered}\)The final step is to convert the 2 moles of water produced to mass in grams using the molar mass of water and mole formula.
The molar mass of water = 18.01g/mol
\(\begin{gathered} Moles=\frac{Mass}{Molar\text{ }mass} \\ \\ Mass=Moles\times Molar\text{ }mass \\ \\ Mass=2mol\times18.01g\text{/}mol \\ \\ Mass=36.02\text{ }g \end{gathered}\)Hence, the mass of water formed is 36.02 g.
The answer is C. 36.02
Using appropriate chemical equation distinguish between cation and anion hydrolysis
Answers
Answer:
HCO3- (aq) + H2O (I) <--> H2CO3 (aq) + OH- (aq)
Explanation:
The equation to distinguish between cation and anion hydrolysis is given below :
HCO3- (aq) + H2O (I) <--> H2CO3 (aq) + OH- (aq)
The important thing to remember is their origin. The anions can react with water and can produce hydroxide ions while hydroxide ions make a solution basic.
How much heat is added if 0.5137g of water increases in temperature by 0.871 degrees C?
Answers
Answer:
1.87 J
Explanation:
q = c x m x (T2-T1)
c- specific heat of water (4.186 j/g.C)
q = 4.186 x 0.5137 x 0.871 = 1.87 J
It is possible to convert moles to particles by doing what
Answers
if the dissolution of borax in water is spontaneous, is the change in enthalpy positive or negative - or are both signs possible?
Answers
Specific heat capacity of a substance is the amount of heat required to raise the temperature by one degree Celsius of one gram of a substance. Therefore, the change in enthalpy will be negative.
What is Enthalpy?Enthalpy term is basically used in thermodynamics to show the overall energy that a matter have. Mathematically, Enthalpy is directly proportional to specific heat capacity of a substances.
Mathematically,
Enthalpy=mass of solution× specific heat capacity of solution ×Change in temperature.
Any reaction which is spontaneous, then the enthalpy related to this type of reaction is always negative that is reaction is always exothermic.
Therefore, the change in enthalpy will be negative.
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Identify the type of reaction and predict the product: Calcium + water -->
Answers
Answer:
Exothermic Reaction
Product = Calcium hydroxide + hydrogen
Explanation:
Calculate the molarity of 0.650 mol of Na2 in 1.50 L of solution.
Molarity:
Answers
Answer: the molarity of 0.650 mol of Na2 in 1.50 L of solution is 0.433 M.
Explanation: the molarity of 0.650 mol of Na2 in 1.50 L of solution is 0.433 M.
Johnson, Taniya
A student travels on a trail by bicycle 20 miles in 2 hours. What is the average speed of the student?
Answers
Answer:
i think its 10 miles per hour
Under what conditions is n2o3 No gas + n02 gas
spontaneous?
Answers
The reaction is spontaneous under conditions of low pressure and high temperature
What is a spontaneous reaction?We can say that a reaction is spontaneous when we know that the reaction is able to go on on its own. This implies that there is a mnimum energy that is required for the reaction to proceed.
The reaction is thus a sort of a self propagating system that goes on freely of its own accord.. We can see that what is going on here is the decomposition of the nitrogen V oxide gas as shown.
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Fill in the blanks below using the following words to model the flow of energy from the sun to a human:
cow, grass, human, sun
Grass uses energy form the_______ to grow. A_______ then eat the grass. When a _______ eat a hamburger, energy is again passed up the food chain.
Answers
Answer:
sun, cow, human
Explanation:
grass uses energy from the sun to grow. a cow then eat the grass. when a human eats a hamburger, energy is again passed up the food chain.
A balloon at 30.0°C has a volume of 222 mL. If the temperature is increased to 64.1°C and the pressure remains constant, what will the new volume be, in mL?
Answers
Answer:
Explanation:
I forgot