Answer:
Melting ice causes more warming.
Because they are darker in color, the ocean and land absorb more incoming solar radiation, and then release the heat to the atmosphere. This causes more global warming. In this way, melting ice causes more warming and so more ice melts.
How does stoichiometry work?
Answer:
stochiometry works with measuring quantitative relationships and used to determine the amount of products and reactants that are produced or needed in a reaction
Answer:
Stoichiometry is the calculation of reactants and products in chemical reactions in chemistry. Stoichiometry is founded on the law of conservation of mass where the total mass of the reactants equals.
What is the answer for 250 K = ? °C
Answer:
This is your answer ☺️☺️☺️
Answer:
-23.15
Explanation:
What happens to the average kinetic energy of gas particles as temperature increases?
Answer:
it dies
Explanation:cause its too cold
Is changing the color of the coin from copper to silver a physical or chemical change?
Answer:
physical
Explanation:
The zinc (which was already silver) coated the penny. The NaOH dissolved the zinc. (that was what made the water murky) And small pieces of zinc adhered to the penny (coated) It was a physical change because no NEW color was created.
List the stages of the Flowering Plant Life Cycle starting with the seed
2 points
Stu Dent wants to create a salt water solution. He uses 0.614 moles of salt and 182 milliliters of water. What is the molarity of the solution?
Type your answer...
Answer: The molarity of solution is 3.37 M
Explanation:
Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.
[tex]Molarity=\frac{n\times 1000}{V_s}[/tex]
where,
n = moles of solute = 0.614
[tex]V_s[/tex] = volume of solution in ml = 182 ml
Now put all the given values in the formula of molarity, we get
[tex]Molarity=\frac{0.614\times 1000}{182}=3.37M[/tex]
Therefore, the molarity of solution is 3.37 M
16.1 g of bromine are mixed with 8.42 g of chlorine to give an actual
yield of 21.1 g of bromine monochloride.
The question is complete, the complete question is;
16.1g of bromine are mixed with 8.42g of chlorite to give an actual yield of 21.1g of bromine monochloride.
Answer:
91 %
Explanation:
Br2 + Cl2 ------>2BrCl
Number of moles of Chlorine = 8.42/71 = 0.119 moles
If 1 mole of Cl2 yields 2 moles of BrCl
0.119 moles of Cl2 will yield 0.119 moles * 2/1 = 0.238 moles of BrCl
Number of moles of Br2 reacted = 16.1/160 = 0.1 moles
If 1 mole of Br2 yielded 2 moles of BrCl
0.1 moles of Br2 yields 0.1 * 2/1 = 0.2 moles of BrCl
Bromine is the limiting reactant.
Mass of BrCl produced = 0.2 moles * 115.357 g/mol = 23.07 g
Theoretical yield = 23.07 g
Actual yield = 21.1 g
Percentage yield = Actual yield/Theoretical yield * 100
= 21.1/23.07 * 100 = 91 %
Which of the following best defines base isolation?(1 point)
Base isolation is a technique used by engineers to help prevent damage to buildings by volcanoes. The main structure of the building is separate from the base, which allows lava to pass under the building without causing much damage.
Base isolation is a technique used to prevent large-scale damage from volcanoes. New communities being built are set as far back as possible from the base of a volcano.
Base isolation is a technique used to prevent damage to buildings during tsunamis. The main structure of the building is separate from the base, which allows water to pass beneath buildings without causing much damage.
Base isolation is a technique used by engineers to help prevent damage to buildings by earthquakes. The main structure of the building is separate from the base and sits on a bed of springs.
Base isolation is a technique used by engineers to help prevent damage to buildings by earthquakes. The main structure of the building is separate from the base and sits on a bed of springs.
What is base isolation?Base isolation is a technique developed to prevent or minimise damage to buildings during an earthquake.
A base isolation system is a method of seismic protection where the structure (superstructure) is separated from the base (foundation or substructure). By separating the structure from its base the amount of energy that is transferred to the superstructure during an earthquake is reduced significantly.
Hence, option D is correct.
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What is the electronegativity difference between oxygen and fluorine? What type of bond is this?
Answer:
Veja, por exemplo, que os elementos mais eletronegativos são os que estão no canto superior direito da tabela, isto é, o flúor (4,0) e o oxigênio (3,5), e os menos eletronegativos são os que estão no canto inferior esquerdo, que são o frâncio (0,8) e o césio (0,8).
Explanation:
how does wind energy combined with machines cause a sailboat to move?
marking as brainliest
Answer:
The wind pushes the sails from behind, causing the boat to move forward.
Answer:
Wind energy obtained by the machine is converted into kinetic energy as it functions and thus enabling the boat to move.
Together, the forces of drag, from the water, and the pressure from the wind against the sail itself push the craft forward. Angling too sharply into the wind causes the forces on the boat to become unbalanced, and moves the boat sideways in the water.
Gaseous ethane CH3CH3 reacts with gaseous oxygen gas O2 to produce gaseous carbon dioxide CO2 and gaseous water H2O. What is the theoretical yield of carbon dioxide formed from the reaction of 1.8g of ethane and 4.6g of oxygen gas?
Answer:
mass of CO₂ produced = 5.06 g of CO₂
Explanation:
Equation of the reaction: 2CH₃CH₃ + 5O₂ ---> 4CO₂ + 6H₂O
From the equation of the reaction, 2 moles of gaseous ethane reacts with 5 moles of oxygen gas to produce 6 moles of water.
molar mass of ethane = 30 g/mol
molar mass of oxygen gas = 32 g/mol
number of moles of ethane present in 1.8 g = 1.8/30 = 0.06 moles
number of moles of oxygen gas present in 4.6 g = 4.6/32 = 0.14375 moles
mole ratio of oxygen gas to ethane = 2.4 : 1
Therefore, oxygen is the limiting reactant
0.14375 moles of oxygen will react with 0.06 moles of ethane to produce 4/5 * 0.14375 moles of CO₂ = 0.115 moles of CO₂
molar mass of CO₂ = 44 g/mol
mass of CO₂ produced = 0.1725 * 44
mass of CO₂ produced = 5.06 g of CO₂
is CH3CH2COOCH2 an aldehyde structure?
At what temperature is breathing rate the highest? *
10 c
15 c
20 c
25 c
Answer:
Depends on what you're doing, you could be running and it goes higher, temperature isn't too much of a difference.
Explanation:
1. A green rat snake that lives in the grass and a brown rat snake that lives
in the desert is a form of
A. Human genetic modification
B. Selective breeding
C. Natural selection
D. Artificial breeding
Answer:
It is an example of natural selection (option c)
Natural selection is demonstrated by a green rat snake living within that grass as well as a brown rat snake living throughout the desert.
Natural selection:The process throughout which communities of sentient creatures adapt but instead transform is known as natural selection. Persons within a demographic are inherently varied, which means they are all unique under certain manner.
This variance indicates that certain people have qualities that are more adapted to their surroundings over others.
Thus "Option C" is correct.
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Which of the following general trends are true for the atomic mass of elements in the periodic table?
1. The atomic mass is usually a decimal number.
II. The atomic mass is always smaller than the atomic number.
III. The atomic mass increases from top to bottom down a group.
IV. The atomic mass increases from left to right across a period.
HELP PLEASE THERE IS NO PICTURE PLZ JUST LEAVE THE ANSWER!!
Answer:
D. the atomic mass increases from left to right
Explanation:
When bonds are (broken/formed) there is a positive energy change.
Answer: Hello i am confused are you asking a question?
Explanation:
What is the partial pressure of hydrogen gas in a mixture of hydrogen Nitrogen, and helium if the total pressure is 700 partial pressure is 155 mmHg, and the partial pressure of nitrogen is 265 mmHg?
Describe the effect of resonance on the amount of rotation that can occur in the main chain of your tripeptide (phenylalanine, alanine, and tyrosine), which affects protein folding.
Answer:
use research.
Explanation:
Why are fossil fuels considered to be a nonrenewable resources? Please help
Answer:
They're considered nonrenewable because they take millions of years to develop. They can't be renewed as fast as we're taking them.
Is neon an atom or ion
I can't leave till I answer please help!!
Answer:
The answer is 2 all you do is divide the 6.02 and 3.01 and you get 2
If a cluster of stars is all the same color, what could that mean?
Answer:
Cluster HR Diagrams: Since all the stars in a cluster formed at the same time, they are all the same age. A very young cluster will have a HR diagram with a cluster of T-Tauri stars evolving towards the main sequence. ... Each star is plotted by its color and magnitude on the HR diagram.
Which of the following is TRUE about a physical change to a substance?
A.
The atoms in a substance will divide.
B.
The mass of a substance will increase.
C.
New substances will likely be formed.
D.
The substance will have the same chemical properties.
Answer:
D.
The substance will have the same chemical properties.
Explanation:
Physical changes do not alter the chemical composition of a substance, so the chemical properties will not change.
Who coined the term "ridgeology"?
Answer:
David R. Ashbaugh
Explanation:
David R. Ashbaugh is a Canadian police officer known for his extensive research on the friction ridge identification, introducing for the first time the use of the term ridgeology in forensic identification and the ACE-V methodology.
BRAINLIEST! A reaction is set up between magnesium and hydrochloric acid. After 30 seconds, the magnesium had decreased in mass by 45g. What was the rate of this reaction?
Answer:
Acidic oxides, or acid anhydride, are oxides that react with water to form an acid, or with a base to form a salt. They are oxides of either nonmetals or of metals in high oxidation states.
Explanation:
CAn someone help me with this?
Answer:
I think D. sorry if I'm wrong:)
Acetic acid (ch3cooh) and trifluoroacetic acid (cf3cooh) are shown by these particulate models. the ka for trifluoroacetic acid is 104 times greater than acetic acid. use the models to account for the differences in magnitude for the ka constant. the green atoms are fluorine, the red atoms are oxygen, the black atoms are carbon, and the white atoms are hydrogen.
Answer:
See explanation
Explanation:
If we look at the models, we will see that the three fluorine atoms in CF3COOH are attached to the carbon that is next to the -COOH group.
As a result of the electron withdrawing effect of the three fluorine atoms, CF3COOH is much more acidic (104 times more acidic) than CH3COOH. This is reflected in the value of the Ka for each acid.
This electron withdrawing effect of the three fluorine atoms also stabilizes CF3COO- much more than CH3COO-.
A 334 mL sample of hydrogen was collected over water at 23C on day when the atmospheric pressure was 756 mm Hg.The vapor pressure of water under these conditions is 17.54 mm Hg. What volume, in liters, will the dry hydrogen ( No water vapor) occupy at STP?
Answer:
0.299 L
Explanation:
We'll begin by calculating the pressure of dry gas. This can be obtained as follow:
Measured pressure = 756 mm Hg
Water vapor pressure = 17.54 mm Hg
Pressure of dry gas =?
Pressure of dry gas = (Measured pressure) – (Water vapor pressure)
Pressure of dry gas = 738.46 mmHg
Finally, we shall determine the volume occupied at STP. This can be obtained as follow:
Initial volume (V₁) = 334 mL = 334 / 1000 = 0.334 L
Initial pressure (P₁) = 738.46 mmHg
Initial temperature (T₁) = 23 °C = 23 °C + 273 = 296 K
Final pressure (P₂) = 760 mmHg
Final temperature (T₂) = 273 K
Final volume (V₂)
P₁V₁/T₁ = P₂V₂/T₂
738.46 × 0.334 / 296 = 760 × V₂/273
Cross multiply
296 × 760 × V₂ = 738.46 × 0.334 × 273
224960 × V₂ = 67334.2597
Divide both side by 224960
V₂ = 67334.2597 / 224960
V₂ = 0.299 L
Thus, the volume of the dry gas st STP is 0.299 L.
10. Lead nitrate solution mixed with sodium sulfate solution forms lead sulfate as a
precipitate.
Pb(NO3)2+ Na2SO4-
PbSO4+ 2NaNO3
In an experiment, the theoretical yield of lead sulfate for this reaction was 2.85 g.
In the experiment only 2.53 g of lead sulfate is obtained.
Calculate the percentage yield of lead sulfate in this experiment. * IT
Answer:
88%.
Explanation:
The percentage yield of lead sulfate in this experiment is 88% if 2.53 is divided by 2.85 and multiply by 100. The percentage yield can be calculated when the experimental yield is divided by theoretical yield and then multiply by 100. The percentage yield tells us about the actual yield that is gained in the end of experiment which is lower than theoretical yield.
A student wants to make 50-mL of a 0.6 mg/L solution of acetic acid. She will be making the solution by diluting a stock with a concentration of 2.0 mg/L. Put the steps for her dilution in order. 4. Cap the flask and invert several times to mix. 2. Fill the volumetric flask with deionized water until the meniscus touches the mark. 6. Swirl the flask to mix the contents. 1. Obtain a 50-mL volumetric flask. 3. Use a pipet to add the appropriate volume of stock solution to the flask. 2. Add approximately 10 mL of deionized water to the empty flask.
Answer:
The steps in order are;
1. Obtain a 50-mL volumetric flask
2. Add approximately 10 mL of deionized water to the empty flask
3. Use a pipet to add the appropriate volume of stock solution to the flask
4. Cap the flask and invert several times to mix
5. Fill the volumetric flask with deionized water until the meniscus touches the mark
6. Swirl the flask to mix the contents
The volume of the acetic acid to be added to the solution is 15 mL
Explanation:
The given steps are;
4. Cap the flask and invert several times to mix
5. Fill the volumetric flask with deionized water until the meniscus touches the mark
6. Swirl the flask to mix the contents
1. Obtain a 50-mL volumetric flask
3. Use a pipet to add the appropriate volume of stock solution to the flask
2. Add approximately 10 mL of deionized water to the empty flask
The given parameters are;
The volume of the volumetric flask = 50-mL
The concentration of the final solution of acetic acid = 0.6 mg/L
The concentration of the stock solution = 2.0 mg/L
Let 'x' represent the volume of the stock solution added, we have;
2.0 mg/L·x + (50 - x)×0 = 0.6 mg/L × 50-mL
x = 0.6 mg/L × 50-mL/(2.0 mg/L) = 15 mL
The volume of the stock solution to be added, x = 15 mL