How many grams of hydrogen gas are produced if 3.0 moles of magnesium are reacted with excess hydrochloric acid?
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Answer k
Explanation: better luck
Related Questions
Which element is a poor conductor of heat?
A. F
B.K.
C. Fe
D. Ag
Answers
Why was periodic table developed
Answers
Answer:
The periodic table was created to organize the elements and provide physical and chemical properties, also to group with elements like it.
Hope this helps
molecule x contains a sugar and a phosphate group. what is molecule x ?
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Has anyone done this???!!!
Answers
Answer:
top one is anaphase and the middle one is cytokinesis can't see enough of the bottom one to tell
Explanation:
Fission involves the _________________ of an atom into smaller particles, while fusion occurs when smaller particles _________________.
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Answer:
1. Splitting
2. Combine
Explanation:
what challenges arise when nuclear material is removed from a power plant?
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Answer:
it destroy the surrounding area
a gas mixture contains 14.0 g of carbon monoxide gas and 7.0 g of hydrogen gas. the total pressure of the gas mixture is 2.40 atm. what is the partial pressure of each gas in this mixture? partial pressure of carbon monoxide gas partial pressure of hydrogen gas (a) 0.15 atm 2.25 atm (b) 0.30 atm 2.10 atm (c) 0.60 atm 1.80 atm (d) 1.60 atm 0.80 atm
Answers
The partial pressure ofcarbon dioxide is 0.3 atm and partial pressure of hydrogen gas is 2.1 atm. The correct option to this question is B.
If we pretend that these gases are perfect, we obtain CO is equal to 14.0g/(28g/mol) = 0.5 moles.
7.0g/(2 g/mol) equals 3.5 moles of hydrogen in order for the partial pressures to the remaining (2.05 atm) for the H2, and (0.5 / 3.5) * 2.4 = 0.34 atm (for CO).
H2 is in equilibrium with at ordinary temperatures, making it far from an ideal gas, and would therefore have significantly less partial pressure than the solution above indicates. This makes it a poor choice of gases for such a theoretical example.
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During the nitrogen cycle, through which structure are nitrogen compounds first absorbed into the plant?
A. Roots
B. Leaves
C. Flower
D. Steam
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So, the correct answer is: A. Roots
please help. I was hoping someone could explain it , cause I have no idea what I'm doing PLEASE HELP. ASAP!!!!
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The additional information that is required to obtain the enthalpy of neutralization is the density of the solution.
What is the enthalpy?We know that the enthalpy of neutralization is defined as the heat that is evolved when an acid is neutralized by a base under standard conditions. We can be able to obtain the enthalpy of the neutralization of the acid and the base by performance of some simple chemical calculations.
To carry out this calculations we need the all of the pieces of information that have been listed in the question such as the masses of the solution, the temperature of the solution in the initial and final states and so on.
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quzilet what are the carbon cycle processes that control the annual rise and fall or carbon dioxide in the mauna loa (keeling) curve?
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The carbon cycle processes that control the annual rise and fall of carbon dioxide in the Mauna Loa (Keeling) curve are photosynthesis, respiration, and decomposition. The carbon cycle is the process by which carbon dioxide enters and exits the Earth's atmosphere.
Carbon dioxide is a gas that aids in the retention of heat in the Earth's atmosphere, contributing to global warming. Carbon dioxide is consumed by plants during photosynthesis and then released back into the atmosphere through respiration and decomposition.
The carbon cycle can be broken down into four main steps: photosynthesis, respiration, decomposition, and combustion. Photosynthesis is the process by which plants consume carbon dioxide and sunlight to generate glucose, which is used as food. Oxygen is released as a byproduct of photosynthesis.
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5. How many atoms are in 1.3 x 1022 molecules of NO2?
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The sample is made up of neutral atoms. Using the information in the diagram shown, determine the number of protons, neutrons, and electrons found in each atom of your sample
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Explanation:
Atoms are generally made up of three fundamental particles which are the protons, neutrons and electrons.
Protons are the positively charged particles within an atom.
Electrons carry negative charges.
Neutrons do not carry any charges.
When an atom is neutral, the number of protons and electrons within the atom is the same.
A charged atom will have a difference in the number of protons and electrons they contain.
1) How many moles are in 3.24 x 1022 atoms of water?
Answers
Answer:
0.054 moles
Explanation:
It is the rounded off answer.
explain why aqueous solutions of ionic crystals conduct electricity? which particles in this case carries electricity?
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Answer:
Ionic compounds conduct electricity when molten (liquid) or in aqueous solution (dissolved in water), because their ions are free to move from place to place. Ionic compounds cannot conduct electricity when solid, as their ions are held in fixed positions and cannot move.
Explanation:
The freezing point of pure water is 0.0 °C. In the previous step, you calculated that the freezing point changes by 1.09 °C. What is the new freezing point of the solution? FP = [?] °C Hint: Remember significant figures are based on place value when adding or subtracting.
Answers
The new freezing point of the solution is 1.09 °C.
Based on the given information, the freezing point of pure water is 0.0 °C, and the freezing point changes by 1.09 °C. To find the new freezing point of the solution, we need to add the change in freezing point to the freezing point of pure water.
0.0 °C + 1.09 °C = 1.09 °C
Therefore, the new freezing point of the solution is 1.09 °C.
When performing calculations with significant figures, it's important to consider the rule for addition and subtraction. According to this rule, the result should be rounded to the least number of decimal places among the values being added or subtracted. In this case, both the freezing point of pure water (0.0 °C) and the change in freezing point (1.09 °C) have one decimal place. Thus, the final answer is also rounded to one decimal place, resulting in a new freezing point of 1.1 °C.
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A wave has a frequency of 35 Hz and a wavelength of 15 meters, what is the speed of the wave?
Answers
Answer:
1174.392 mph
Explanation:
.....................
Use the periodic to fill in the numbers in the electron configurations shown below.
B: 1s2 2sA2pB
A =
2
B =
1
Na: 1s22sC2pD3sE
C =
D =
E =
Answers
Answer:
B: 1s²2s²2p¹
Na: 1s²2s²2p⁶3s¹
Explanation:
A = 2
B = 1
C = 2
D = 6
E = 1
Imagine that one tree outside your home looks unhealthy, although all the other trees seem healthy and strong. Describe how you could apply scientific thinking to the situation to determine why only one tree looks unhealthy. Write your answer down bellow Did you: include an asking question based on your observation about trees? Include details about what kind of data you would collect answer you question? Include a plan about how you would use the data collected to answer you question? Order the steps of your scientific investigation in a logical in order Question from Calvert Learning
Answers
Answer:
Hypothesis---experiments----results----conclusion.
Explanation:
First we make a hypothesis means a statement about why the tree looks unhealthy. In this segment of scientific method we have to test the hypothesis through experimentation. After that we have to take the readings of various parts of the tree and analyze the data to find out the problem. In the next step, we have to made the results on the basis of the data that is obtained. In the last we have to write the conclusion of the analysis and see the hypothesis.
During a lab experiment performed at STP conditions, you prepare HCl by reacting 100. ml of Cl2 gas with an excess of H2 gas.
How many ml of a solution of Ba(OH)2 0.230M do you need to neutralize all the HCl produced?
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Answer: 19.4 mL Ba(OH)2
Explanation:
H2(g) + Cl2(g) --> 2HCl(aq) (make sure this equation is balanced first)
At STP, 1 mol gas = 22.4 L gas. Use this conversion factor to convert the 100. mL of Cl2 to moles.
0.100 L Cl2 • (1 mol / 22.4 L) = 0.00446 mol Cl2
Use the mole ratio of 2 mol HCl for every 1 mol Cl2 to find moles of HCl produced.
0.00446 mol Cl2 • (2 mol HCl / 1 mol Cl2) = 0.00892 mol HCl
HCl is a strong acid and Ba(OH)2 is a strong base so both will completely ionize to release H+ and OH- respectively. You need 0.00892 mol OH- to neutralize all of the HCl. Note that one mole of Ba(OH)2 contains 2 moles of OH-.
0.00892 mol OH- • (1 mol Ba(OH)2 / 2 mol OH-) • (1 L Ba(OH)2 / 0.230 M Ba(OH)2) = 0.0194 L = 19.4 mL Ba(OH)2
HELP ME!!!! (1 point)
When Neils Bohr observed that unique wavelengths of light and color were released when different gases were exposed to electrical current, this led him to develop a new model of the atom that reflected what he had discovered about the location of the electrons in an atom. Which statement is most consistent with his proposed model of the atom based on these findings?
a. Electrons were able to move freely throughout the nucleus
b. Electrons were bound tightly inside the nucleus of the atom
c. Electrons were in orbits of both fixed size and energy
d. Electrons were scattered randomly throughout the atom
PERSONAL REQUEST (optional): When you place the answer please include an explanation that shows how the answer connects to the overall question. Thank you! :)
Answers
Electrons were in orbits of both fixed size and energy.
The main features of Niels Bohr's proposed atomic model are listed below.
In an atom, a positively charged nucleus is surrounded by negatively charged electrons. These electrons travel along distinct circular trajectories called orbits or shells.According to this atomic model, each of the circular routes, which have set energy levels, is referred to as an orbital shell.The integers n=1, 2, 3,... indicate the energy levels of electrons in various orbits and are referred to as quantum numbers. These numbers correspond to the shells K, L, M, and N for the integers 1, 2, and 3, respectively. Since it is nearest to the nucleus and has the lowest energy level of an electron (n=1), it is sometimes referred to as the ground state.An electron can go to a higher energy orbital shell by receiving energy (or photons), and it can move to a lower energy level or orbital shell by losing energy.To learn more about Niels Bohr's refer the link:
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Science and technology are different, yet related, fields of study. Which action is best classified as science?
A.
making a prosthetic leg to help a person walk
B.
building houses that can withstand strong earthquakes
C.
designing a faster type of computer
D.
analyzing cells of a newly discovered species
Answers
Answer:
Option D
Explanation:
analyzing cells is something I'm doing in science class right now!
Hope this helped, have a nice day! :)
Answer:
Science and technology are different, yet related, fields of study. Which action is best classified as science?
Explanation:
If it rains, then practice is cancelled that day.
It rains on Thursday. What can you conclude?
Answers
Answer:
I can conclude practice was cancelled on Thursday
Explanation:
Since the sentence says "If it rains, practice is cancelled that day" since its raining on Thursday, practice is cancelled for Thursday
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A glycosidic bond is a bond between the anomeric carbon of a carbohydrate and any other biological molecule
a. true
b. false
Answers
The statement "a glycosidic bond is a bond between the anomeric carbon of a carbohydrate and any other biological molecule" is true.A glycosidic bond is a type of covalent bond that forms between the anomeric carbon of a carbohydrate molecule and another molecule, such as another carbohydrate, a protein, or a lipid.
The anomeric carbon is the carbon atom in a carbohydrate molecule that was involved in the formation of the carbonyl group (C=O) during the cyclization of the sugar. The anomeric carbon can exist in two different configurations, alpha or beta, depending on the orientation of the hydroxyl group (-OH) attached to it. When the anomeric carbon reacts with another molecule, such as an alcohol or amine group of another carbohydrate, a glycosidic bond is formed.
Glycosidic bonds are important in the formation of complex carbohydrates, such as starch, glycogen, and cellulose, as well as in the synthesis of glycoproteins and glycolipids. The type of glycosidic bond formed between two carbohydrates can have significant implications for their biological function and the properties of the resulting molecule.
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11. Carbon tetrachloride is a solvent which is used as a refrigerant and also as a cleaning agent.
CH4 + 4Cl₂ ⇒ CCl4 + 4HCI
Use the balanced chemical equation above to calculate how many grams of carbon tetrachloride
(CCl4) can be produced from reacting 709.0 grams of chlorine (Cl₂).
Molar Mass Cl₂ = 70.906 g/mol
Molar Mass CCl4 = 153.823 g/mol
a. 3.845 g
b. 61.53 g
384.5 g
6153 g
c.3845 g
d.6153 g
Answers
Answer:
3846g of Carbon tetrachloride is in the chemical equation.
Explanation:
The Balanced equation is :
CH4 + 4CL2 -> CCL4 + 4HCL
By observing the equation There are 4 moles of chlorine react to produce 1 mole of carbon tetrachloride.so, should use the mole ratio to tell the moles of carbon tetrachloride produced, and convert the moles of CCL to grams.Molar Mass of CL2 is 70.906 g/molMolar Mass of CCL4 is 153.823 g/molThe mass of CL2 is 709.0 gramsConverting grams to moles ;
Moles of CL2 = Mass / Molar mass
Molles of CL2 = 709.0g/70.906g/mol => 10 moles
Moles of CCL4 = Moles of CL2 / 4
Moles of CCL4 = 10 moles/ 4 => 2.5 moles
Converting moles of CCL4 to grams:
Mass of CCL4 = Moles of CCL4 x Molar mass of CCL4
Mass of CCL4 = 2.5 moles x 153.823 g/mol => 384.5575 grams
Therefore 384.6 grams of carbon tetrachloride can be produced from reacting 709.0 grams of chlorine.
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Which organelle is much bigger in a plant cell than an animal cell?
A:
Chloroplast
B: Vacuole
C: Cell wall
D: Cell membrane
Please help me ASAP
Answers
Answer:
Plant and animal cells differ in that plants have a large central vacuole, while animals have smaller vacuoles. Plant cells also have cell walls and plastids, while animal cells do not.
Answer:
B. Vacuole
Explanation:
The vacuole holds large amounts of water or food.
If a wave of red light has a wavelength of 6.7 x 10-7 m, will the frequency of the red wave be high or low?
Answers
Answer:
Its high
Explanation:
Becuase if u times it what do u get
How might a collision between Neptune and Halley's Comet
affect Neptune's orbit?
Answers
Answer:
It will mess up the orbit around the sun
Explanation:
The impact of Halley's Comet with Neptune may force the asteroid to descend into Neptune's orbit, which may divert somewhat from its original path.
The collision of two heavenly bodies results in a powerful impact.
This collision might prevent Halley's Comet from continuing on its path and eventually colliding with Neptune.
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when planning this synthesis, the next logical step is to identify the carbon atoms of the original starting material. on the structure provided, mark the carbon atoms that most likely came from acetylene.
Answers
In order to identify the carbon atoms that most likely came from acetylene in the synthesis process, we need to understand a bit more about the properties of acetylene and its reactions.
Acetylene is a hydrocarbon with the chemical formula C2H2, meaning it is composed of two carbon atoms and two hydrogen atoms. When acetylene undergoes a reaction known as hydroboration-oxidation, it can be transformed into a variety of organic compounds, including alcohols and aldehydes.
In order to determine which carbon atoms in the starting material most likely came from acetylene, we would need to know more about the specific synthesis process being used. However, it's possible that the carbon atoms that came from acetylene would be the ones directly attached to the carbon-carbon triple bond in the molecule.
Without more information, it's difficult to say for sure which specific carbon atoms in the starting material came from acetylene. However, by understanding the properties and reactions of acetylene, we can make some educated guesses about which atoms might be involved in the synthesis process.
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For each pair of carbene/alkylidene complexes shown below identify the one that should have the stronger M-C bond. Give a brief explanation for your answer (i) [(CO)5V-C(OMe)(NMe2)]- (ii) Cp2BrTa-CH2 (iii) Cp(PMe3):Re-cBu2 (iv) [Cp(dppe)Fe-CPh2] vs Cp(PMe3)-Re-СМег vs Cp(CO)(PEt3)Ru-CH2l vs Cp(CO)2(PPh3)W-C(OMe2l vs CpO)Nb-CH2 IV
Answers
The given carbene alkylidene complexes [(CO)5V-C(OMe)(NMe2)]-, Cp2BrTa-CH2, Cp(PMe3):Re-cBu2, [Cp(dppe)Fe-CPh2], Cp(PMe3)-Re-СМег, Cp(CO)(PEt3)Ru-CH2, Cp(CO)2(PPh3)W-C(OMe2).
Tantalum has an oxidation state of +4 which indicates that it can provide more electrons to the C atom compared to the metals having higher oxidation states.
Ta-C bond is stronger than other complexes. Hence, Cp2BrTa-CH2 has the stronger M-C bond. Cp2BrTa-CH2 is a metallocene where Ta tantalum is present in a lower oxidation state of +4 which is favorable for stronger M-C bond in comparison to other carbene/alkylidene complexes.
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biuret test shows the presence of choose... . a positive biuret test appears as choose... . a negative biuret test appears as
Answers
Biuret test shows the presence of proteins, a positive biuret test appears as violet or purple color, and a negative test appears as light blue color or remain colorless.
The Biuret test is a biochemical assay used to detect the presence of proteins. When performing the Biuret test, a solution containing the protein of interest is mixed with a solution containing copper sulfate and sodium hydroxide. If proteins are present in the solution being tested, a color change occurs, indicating a positive result.
A positive Biuret test appears as a violet or purple color. This color change is due to the formation of a complex between the copper ions in the copper sulfate solution and the peptide bonds in the proteins. The complex absorbs light in the visible spectrum, particularly in the violet region, resulting in the observed color change.
On the other hand, a negative Biuret test appears as a light blue color or remains colorless. This indicates the absence of proteins in the tested solution. In the absence of proteins, the copper ions in the copper sulfate solution do not form the complex with peptide bonds, resulting in no significant color change.
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