Answers
Answer:
0.006342moles
Explanation:
1000ml of NaOH contain 0.151moles
42ml of NaOH contain (42*0.151)/1000 moles
=0.006342moles
Related Questions
Reading the Temperature of Thermometers
Read the temperatures shown to the nearest 0.5°C.
50
40
100
45
90
30
40
80
35
70
30
20
"C
F
C
Answers
Answer:37.0,42.5
Explanation:
It is possible to convert moles to particles by doing what
Answers
If you added 1.9 kJ of heat to 100g of completely solid ethyl alcohol (at its melting temperature) and 100 g of completely solid water (at its melting temperature) which of the statements below would be true:A) the ethyl alcohol would be solid and the water liquidB) both substances would be solid C) both substances would be liquidD)the water would be solid and the ethyl alcohol would be liquid.
Answers
Both substances would be liquid, option C
In using the Haber process in the formation of ammonia, what mass of hydrogen is needed to produce 51.0 grams of ammonia? 3 H₂(g) + N2 (g) → 2 NH3(g).
Answers
The mass of hydrogen needed to produce 51.0 grams of ammonia is ≈ 9.07 grams.
To determine the mass of hydrogen required to produce 51.0 grams of ammonia (NH3) using the Haber process, we need to calculate the stoichiometric ratio between hydrogen and ammonia.
From the balanced chemical equation:
3 H₂(g) + N₂(g) → 2 NH₃(g)
We can see that for every 3 moles of hydrogen (H₂), we obtain 2 moles of ammonia (NH₃).
First, we need to convert the given mass of ammonia (51.0 grams) to moles. The molar mass of NH₃ is 17.03 g/mol.
Number of moles of NH₃ = Mass / Molar mass
= 51.0 g / 17.03 g/mol
≈ 2.995 moles
Next, using the stoichiometric ratio, we can calculate the moles of hydrogen required.
Moles of H₂ = (Moles of NH₃ × Coefficient of H₂) / Coefficient of NH₃
= (2.995 moles × 3) / 2
≈ 4.493 moles
Finally, we can convert the moles of hydrogen to mass using the molar mass of hydrogen (2.02 g/mol).
Mass of H₂ = Moles × Molar mass
= 4.493 moles × 2.02 g/mol
≈ 9.07 grams
Therefore, approximately 9.07 grams of hydrogen is needed to produce 51.0 grams of ammonia in the Haber process.
Know more about the mass of hydrogen here:
https://brainly.com/question/14083730
#SPJ8
I need help with this question, please.Is there anyone available to assist?Thanks
Answers
Answer:
Remove H2, shift left. (first option)
Explanation:
Since the reaction is in equilibrium, when removing H2 (reactant), the reaction will try to restore the equilibrium by forming more H2, thet is, it will move to the left.
Before a new medicine is approved, scientists study the effects the medicine has on different parts of the body. Often, a medicine is tested on mice before it is tested on humans. All the cells in the illustration below came from the same mouse.
Four images of unique looking cells
If all of these cells are mouse cells, why do they look so different from each other?
A. Cells change shape as they get older.
B. Different cells specialize in different functions.
C. Each kind of cell is from a different organ system.
D. Different-shaped cells came from different ancestors.
Answers
Answer:
different cell specialized in different function
Different cells specialize in different functions but they look so different from each other.
What is a cell?The basic and structural component of life is the cell. Cell biology is the study of cells, including their fundamental makeup and each organelle's functions. Cells were initially found by a biologist, Robert Hooke.
Cells comprise all living things. They could consist of several cells or just one (unicellular) (multicellular). The tiniest known cells are mycoplasmas. The foundation of all living things is cells. They give the body structure and transform the food's nutrients into energy.
Complex cells have many parts that each serve a different purpose within an organism. Similar to constructing bricks, they come in a variety of sizes and shapes. Our body is made up of various types of cells.
To learn more about the cell, refer;
https://brainly.com/question/12129097
#SPJ2
When the suns radiant energy for the Earth oceans, it causes water to change state by that rating which form of energy does water vapor have
Answers
Water vapor has latent heat energy, which is absorbed or released during the process of changing states from liquid to gas or gas to liquid.When the sun's radiant energy hits the Earth's oceans, it causes the water molecules to absorb this energy and become more energized.
This leads to the water molecules breaking apart and transforming into water vapor, which is a gaseous state of water. Water vapor has a specific form of energy known as latent heat. This is the energy required to change the physical state of water from a liquid to a gas or from a gas to a liquid. The process of converting water into water vapor requires energy, and this energy is stored in the water vapor in the form of latent heat.
The amount of latent heat absorbed or released by water vapor is dependent on the temperature and pressure conditions. When the water vapor condenses back into liquid form, this latent heat is released into the atmosphere. This process plays a critical role in weather and climate patterns as it drives the movement of heat and moisture throughout the Earth's atmosphere.
In summary, water vapor has latent heat energy, which is absorbed or released during the process of changing states from liquid to gas or gas to liquid. This energy plays a vital role in the Earth's weather patterns and is a critical component of the Earth's energy balance.
For more such questions on heat energy
https://brainly.com/question/934320
#SPJ11
CH3-CH=CH3-CH what is the name of this structure?
Answers
Answer:
if you meant CH3-CH=CH-CH3, the IUPAC name is 2-butene.
can y’all please help with this? :(
Answers
P Ar = 1.5
P Xe = 0.5
P tot = 2 atm
Further explanationDalton's law of partial pressures states that the total pressure of a mixture of gases is equal to the sum of the partial pressures of the component gases
Can be formulated:
P tot = P1 + P2 + P3 ....
The partial pressure is the pressure of each gas in a mixture
3 L Argon , P = 1 atm and 1 L Xe, P=1 atm⇒assume T = 273 K
mol Argon :
\(\tt n_{Ar}=\dfrac{PV}{RT}=\dfrac{1\times 3}{0.082\times 273}=0.134\)
mol Xenon :
\(\tt n_{Xe}=\dfrac{1\times 1}{0.082\times 273}=0.045\)
\(\tt P_{Ar}=\dfrac{nRT}{V}=\dfrac{0.134.0.082.273}{2}=1.5\)
\(\tt P_{Xe}=\dfrac{nRT}{V}=\dfrac{0.045.0.082.273}{2}=0.5\)
P tot = 1.5 + 0.5 = 2 atm
A vehicle travels 2345 meter in 35 second toward the evening sun in the West. What is its speed? A. 47 m/s West
Answers
Explanation:
Speed = 2345 ÷ 35 = 67m/s
How does an atom become a positively charged ion?
Answers
Radar images storms by
Answers
The half reaction with a more positive standard reduction potential will
Answers
The half reaction with a more positive standard reduction potential will proceed spontaneously in a redox reaction
The half reaction with a more positive standard reduction potential will undergo reduction when compared to the half reaction with a more negative standard reduction potential.
Oxidation-reduction reactions, often known as redox reactions, are a set of chemical reactions that involve electron transfer between reactants. In a redox reaction, one reactant is oxidized, losing electrons, while the other reactant is reduced, gaining electrons.
The oxidation half-reaction is the process of losing electrons and increasing the oxidation number, whereas the reduction half-reaction is the process of gaining electrons and decreasing the oxidation number. The total reaction is referred to as the redox reaction.
Half-reaction:Half-reaction refers to the two parts of an oxidation-reduction reaction that happen separately. A half-reaction must always be either an oxidation reaction or a reduction reaction. It also describes the movement of electrons and hydrogen ions in an equation.
Know more about redox reaction here:
https://brainly.com/question/21851295
#SPJ8
Sodium reacts with oxygen to produce sodium oxide.
4Na(s)+O2(g)→2Na2O(s)
How many grams of Na2O are produced when 32.2 g of Na reacts?
Answers
Answer:
32.2 g of Na will produce 43.4 g of Na2O.
Explanation:
The balanced chemical equation for the reaction between sodium and oxygen shows that 4 moles of sodium react with 1 mole of oxygen to produce 2 moles of sodium oxide:
4Na(s) + O2(g) → 2Na2O(s)
To solve this problem, we can use the following steps:
Step 1: Convert the mass of Na given in the problem to moles using the molar mass of Na.
molar mass of Na = 23 g/mol
moles of Na = mass of Na / molar mass of Na
moles of Na = 32.2 g / 23 g/mol
moles of Na = 1.4 mol
Step 2: Use the mole ratio from the balanced chemical equation to determine the moles of Na2O produced.
From the balanced chemical equation, we can see that 4 moles of Na react to produce 2 moles of Na2O.
moles of Na2O = (moles of Na / 4) x 2
moles of Na2O = (1.4 mol / 4) x 2
moles of Na2O = 0.7 mol
Step 3: Convert the moles of Na2O to grams using the molar mass of Na2O.
molar mass of Na2O = 62 g/mol
mass of Na2O = moles of Na2O x molar mass of Na2O
mass of Na2O = 0.7 mol x 62 g/mol
mass of Na2O = 43.4 g
Therefore, 32.2 g of Na will produce 43.4 g of Na2O.
18 Base your answers to the questions on the
information below and on your knowledge of
chemistry.
An operating voltaic cell has
magnesium and silver electrodes. The
cell and the ionic equation representing
the reaction that occurs in the cell are
shown below.
Wire
Mg(s)
electrode
Voltaic Cell
Mg" (aq)
V
Voltmeter
Salt
bridge
Ag (aq)
Ag(s)
electrode
Mg(s) + 2Ag (aq) + Mg(aq) + 2Ag(s)
State the purpose of the salt bridge in this cell.
Answers
The cell's reaction is not disrupted, and the electrons continue to flow between the two half-cells through the wire to produce electricity.
In a voltaic cell, a salt bridge is utilized to maintain the electrical neutrality of the half-cells. A salt bridge is an ionic conductor that allows the movement of cations and anions between the two half-cells without allowing any mixing of the electrolytes.
Its primary function is to prevent the buildup of electric charges on the electrodes, which would result in a sudden stop of the reaction in the cell.What is a salt bridge-A salt bridge is an electrolytic channel that connects the oxidation and reduction half-cells of a voltaic cell to allow ions to flow between them.
The salt bridge is essential to maintain the electrical neutrality of the half-cells and maintain the cell's electrical energy. What is the purpose of the salt bridge in this cell?In the given cell, the salt bridge purpose is to keep the electrical neutrality of the half-cells.
The salt bridge ensures that the cell's two half-cells maintain their neutrality by providing a flow of ions from one half-cell to the other. As a result, the cell's reaction is not disrupted, and the electrons continue to flow between the two half-cells through the wire to produce electricity.
for such more questions on reaction
https://brainly.com/question/26084288
#SPJ8
A Carnot engine takes 2000 j of heat from a reservoir at 500 k, does some work and discards some heat to a reservoir at 350k . how much work does it do, how much heat is discarded, and what is it's efficiency?
Answers
Answer:
Explanation:
The Carnot engine is a theoretical or conceptual heat engine that has a higher efficiency than any practical or theoretical heat engine working between the same temperature range. The theoretical efficiency of a Carnot engine is considered as the highest efficiency and no practical heat engines can operate at that efficiency. A Carnot engine draws heat energy, performs useful work and the leftover energy is released from the working substance. According to the second law of thermodynamics, there must be a temperature gradient between the heat energy drawing point and release point of the heat engine.
Consider the reaction below:
2 CO(g) + O₂(g) ⇌ 2 CO₂(g)
If Kc is 2.24 × 10²² at 1273.0 °C, calculate Kp at the same temperature.
Answers
The Kc is 2.8 * 10^24
What is the Kp?In chemistry, Kp usually refers to the equilibrium constant of a reaction that involves gases. It is defined as the ratio of the partial pressures of the products to the partial pressures of the reactants, each raised to the power of their stoichiometric coefficients.
Kp= Kc (RT)^Δn
Thus;
Kc = Kp/(RT)^Δn
Kc = 2.24 × 10²² /(0.082 * 1546)^-1
Kc = 2.8 * 10^24
Thus the Kc of the reaction when we consider the concentration of the reactants is 2.8 * 10^24
Learn more about Kp:https://brainly.com/question/22074421
#SPJ1
How do Winds Form?
Helps
Answers
There are several factors that can cause differences in air pressure, including temperature, humidity, and the rotation of the Earth. For example, warm air rises and creates an area of low pressure, while cold air sinks and creates an area of high pressure. The greater the difference in temperature between two areas, the greater the difference in air pressure and the stronger the wind.
The rotation of the Earth also plays a role in wind formation. The Coriolis effect, which is caused by the Earth's rotation, causes winds to curve as they move across the Earth's surface. This effect causes winds to move counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere.
Other factors that can influence winds include the topography of the land, the presence of large bodies of water, and the movement of weather systems. All of these factors work together to create the complex patterns of wind that we observe in the atmosphere.
Which overall chemical equation is obtained by combining these intermediate equations?
Answers
CH4(g) + 2O2(g) → CO2(g) + 2H2O(l),
which is the first answer choice.
In essence, all you’re doing here is swapping water vapor for liquid water.
When using PCR to study DNA, primers attach to the exposed base pairs and begin to form double-stranded DNA. What stage of the process does this MOST accurately describe
Answers
The stage that this most accurately describes while using the PCR is the initiation of DNA synthesis, also known as the denaturation stage.
What occurs in the denaturation stage?In the denaturation stage of Polymerase Chain Reaction (PCR), the double-stranded DNA template is heated to a high temperature to separate the two complementary strands and create single-stranded DNA. The denaturation stage is the first step in the PCR cycle.
In this stage, the heat-stable DNA polymerase denatures the DNA and the primers anneal to the complementary single-stranded template. This marks the beginning of the extension stage, where the DNA polymerase synthesizes new complementary strands along the template DNA.
Learn more on denaturation stage here: https://brainly.com/question/27493294
#SPJ1
A white solid can be purified from lemon juice. This solid tastes sour. When placed into water the solution conducts electricity and has a pH of 3.0. The solution turns litmus paper red. When the white powder is reacted with sodium hydroxide, a different white powder is formed which tastes salty. What kind of substance is the original white powder isolated from lemon juice?
A an acid
B a base
C a salt
D an enzyme
Answers
The kind of substance which the original white powder that is isolated from lemon juice is: A an acid.
What is pH?pH simply refers to an abbreviation for the power of hydrogen ions and it can be defined as a measure of the molar concentration of hydrogen ions in a particular chemical substance or solution.
This ultimately implies that, a pH scale can be used to measure and specify the acidity, neutrality or basicity (alkalinity) of any chemical substance or solution.
On a pH scale, a chemical substance or solution with a pH of 7 is neutral, a chemical substance or solution with a pH below 7 is acidic, and a chemical substance is basic (alkaline) when it's pH is above 7.
In this scenario, this original white powder is an acid because it has a pH of 3.0.
Read more on pH here: https://brainly.com/question/24242819
#SPJ1
Glucose, C6H12O6, is used to prepare intravenous feeding solutions. What volume of 5.0 % W/V glucose solution can be prepared using 125 g of glucose? Show your working.
Please if the answer is correct, ill give brainliest
Answers
250 L of 5.0% w/v glucose solution can be prepared using 125 g of glucose.
We use the below formula to solve our problem,w/v = [ mass of solute (g) / volume of solution (mL) ] × 100
Substitute the values from our problem,5.0 % w/v = [ 125 g / volume of solution (mL) ] × 100
Rearranging the formula, we havevolume of solution (mL) = [ 125 g / 5.0 % w/v ] x 100
Substitute further for w/v,volume of solution (mL) = [ 125 g / (5.0 / 100) ] x 100
Simplify the expression,volume of solution (mL) = [ 125 g / 0.05 ] x 100
Hence, the volume of solution (mL) = 250,000 mL or 250 LSUPER CONFUSED AND NEED HELP, WOULD BE VERY APPRECIATED!!!
2.0 mol of Ca(OH)2 are mixed with 2.0 mol of HCl according to the following equation:
Ca(OH)2+2HCl=CaCl2+2H2O
a. Which chemical is in excess and which is limiting reactant?
b. What is the excess in grams?
c.Theoretically, how many moles of H2O will be produced?
Answers
We need 1 mole of Ca(OH)2 for every 2 moles of HCl since Ca(OH)2 is a need for every 2 moles of HCl. Because HCl is in excess and Ca(OH)2 is the limiting reactant in this reaction, 2.0 moles of H2O should theoretically be created.
If 2 moles of HCl and 2 moles of Ca OH 2 react, what is the limiting agent?The stoichiometric coefficients can be used to calculate the excess reagent. Calcium hydroxide and HCl have stoichiometric coefficients of 1 and 2, respectively. Thus, HCl is the reaction's limiting reagent.
What kind of chemical transformation occurs when Ca 2H2O becomes Ca OH 2?The redox reaction Ca+2H2OCa(OH)2+H2 is an illustration of this.
To know more about limiting reactant visit:-
https://brainly.com/question/14225536
#SPJ1
Why glucose does not give positive result with iodine test but not starch?
Answers
Answer:
This is a physical test. A chemical test for starch is to add iodine solution (yellow/brown) and look for a colour change. In the presence of starch, iodine turns a blue/black colour. ... Benedict's reagent will give a positive test result for glucose but not for starch.
Explanation:
please give me brainlist and follow
Answer:Amylose in starch is responsible for the formation of a deep blue color in the presence of iodine. The iodine molecule slips inside of the amylose coil.
Explanation:This makes a linear triiodide ion complex with is soluble that slips into the coil of the starch causing an intense blue-black colo
Which of these changes is an example of a physical change?
A. electrolysis of water forming hydrogen and oxygen
B. cooking an egg
C. melting ice
D. iron combining with oxygen to form rust
Answers
Answer: C. Melting Ice
Explanation: The rest are chemical changes, the ice is the same substance (water), just changing physical forms, solid --> liquid
The alcohol product contains two different types of hydroxyl groups. Why does the polymer-supported reaction with methanol convert only one of the hydroxyl groups to an ether group but not the other
Answers
Answer:
The other may not be free.
Explanation:
In the polymer-supported reaction with methanol, the reaction will undergo at one hydroxyl group because others may not be free due to bonding with other molecules. The hydroxyl groups could be bonded with the polymer with the help of hydrogen bonding of molecules. The hydroxyl group has to be bonded to only the compatible molecules and free molecules.
We have that this is because of Chemoselective reaction where one functional group reacts before or in the presence of another.
Hydroxyl groups reactionGenerally, A hydroxy is a group with there chemical formula represented as -OH, and are made up of one oxygen atom in a covalent bond with one hydrogen atom.
In polymer supported response of an alcohol with methanol selectively bear response at one hydroxy to the fact the every other hydroxy can also now not be free due to it may additionally linked with the polymer via H-bonding.
Therefore, Chemoselective reaction where one functional group reacts before or in the presence of another.
For more information on Chemical reaction visit
https://brainly.com/question/11231920
On Earth he weighs 720 newtons. List of weights: 655 N; 1,872 N; 792 N; 36 N; and 661 N. What planets does he visit?
Answers
On Earth he weighs 720 newtons. 36N is the weight. Therefore, the correct option is option D among all the given options.
What is weight?The gravitational force of attraction exerted on an item by the presence of a huge second object, including the Earth or Moon. Weight is a result of the fundamental law of gravitation: whatever two things have the same weight.
They attract each other using a force that really is directly related to the sum of their masses as well as inversely related to the square of something like the distance separating them due to their masses.
F = mass ×4/9g
= 720 ×4/9
=36N
Therefore, the correct option is option D.
To know more about weight, here:
https://brainly.com/question/12156778
#SPJ9
Si me sigues te sigo va ❤❤❤❤❤❤❤❤❤❤❣☁❣☁❣☁❣☁❣☁❣☁❣☁❣☁❣☁❣☁❣☁❣☁❣☁❣☁❣☁❣
Answers
Answer:
Hi beautiful howa u hope great
SRPH
What is the solution to log (9x)-log 3 = 3?
Answers
Answer:
\(\frac{1000}{3}\)
Explanation:
Given problem:
log 9x - log 3 = 3
To solve this problem, we need to find the value of x for which when the expression is simplified, we would a solution of 3;
From log rules;
log a - log b = log \(\frac{a}{b}\)
So;
log 9x - log 3 = 3
log( \(\frac{9x}{3}\)) = 3
log 3x = 3
So;
3x = 10³
x = \(\frac{1000}{3}\)
What information would you need to determine the most likely resonance structure for the molecule?
A. The formal charge of each atom
B. The polarity of each covalent bond
C. The Lewis structure of the molecule
D. The bond length of each covalent bond
Answers
Answer:
The Formal Charge of Each Atom
Explanation:
I just took the test!
Answer:
A. The formal charge of each atom
Explanation: