Answer:
286
Explanation:
see ur periodic table
The pressure on 30 milliliters of an ideal gas increases from
760 torr to 1520 torr at constant temperature. The new volume is
V1 = 30 mL
P1 = 760 torr
P2 = 1520 torr
V2 = ?
applying Boyle's Law
P1*V1 = P2*V2
760 torr * 30 mL = 1520 torr * V2
V2 = 760 torr * 30 mL / 1520 torr
( C ) is correct
is CH3CH2COOCH2 an aldehyde structure?
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.
Learn more about base isolation here:
https://brainly.com/question/11337994
#SPJ2
How does the ocean
currents affect weather?
Explanation:
Ocean currents act as conveyer belts of warm and cold water, sending heat toward the polar regions and helping tropical areas cool off, thus influencing both weather and climate.Land areas also absorb some sunlight, and the atmosphere helps to retain heat that would otherwise quickly radiate into space after sunset.The ocean doesn't just store solar radiation; it also helps to distribute heat around the globe. When water molecules are heated, they exchange freely with the air in a process called evaporation. Ocean water is constantly evaporating, increasing the temperature and humidity of the surrounding air to form rain and storms that are then carried by trade winds. In fact, almost all rain that falls on land starts off in the ocean. The tropics are particularly rainy because heat absorption, and thus ocean evaporation, is highest in this area.
11. How many moles of O2 can be produced by letting 12.00 moles of
KCIO3 react?
2KCIO2 → 2KCI + 30,
A. 18 mol 02
B. 36 mol 02
C. 1.5 mol 02
D. 6 mol 02
Answer:
Molarity of the solution = 0.08 M
Further explanation
Molarity is a way to express the concentration of the solution
Molarity shows the number of moles of solute in every 1 liter of solute or mmol in each ml of solution
Where
M = Molarity
n = Number of moles of solute
V = Volume of solution
0.5 lb=226,796 g
MW silver nitrat - AgNO₃ = 169,87 g/mol
mol AgNO₃ :
Molarity :
What is climate and what are the two main factors that affect climate?
Need answers within 5 minutes!
Answer:
climate:the weather conditions prevailing in an area in general or over a long period.
2 main factors: temperature and precipitation
Explanation:
Using the fact that at 0.10 M, the absorbance was 0.357; and at 0.20 M, the absorbance was 0.714, the absorptivity (slope) is
Blank 1
(answer to 2 dec places). Using your absorptivity, if an absorption of 0.250 is measured, the concentration is
Blank 2
M (answer to 2 dec places)
Answer:
The answer is "3.57 and 0.07".
Explanation:
Using the slop formula:
[tex]=\frac{n_2-n_1}{n_2-n_1}\\\\ =\frac{0.714-0.357}{0.20-0.10} \\\\ = ABSORPTIVITY, \ \ a=3.57 \\\\A= a\times b \times c[/tex]
Given:
[tex]A=0.250[/tex]
length path [tex]b=1[/tex]
from calibration it is found that
[tex]a=3.57\\\\consentation \ c=\frac{A}{a\times b} \\\\C=\frac{0.250}{3.57\times 1}[/tex]
[tex]=0.07 \ M[/tex]
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.
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.
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.
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:
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:
What organ is known as the windpipe and the tube takes in air ?
Answer:
The trachea, commonly known as the windpipe, is a tube about 4 inches long and less than an inch in diameter in most people. The trachea begins just under the larynx (voice box) and runs down behind the breastbone (sternum).
Explanation:
The pendulum has the greatest kinetic energy and no potential energy when it is _____.
swinging upward
at the top of the swing
at the bottom of the swing
swinging downward
Answer:
At the top of the swing
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.
How many moles in 0.672L of F2?
Answer:
c
Explanation:
i think if not tell me ok
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:
Please help, i will mark brainliest.
Answer:
It’s the second option ; 2,1,3,2
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.
Find out more information about Natural selection here:
https://brainly.com/question/14485249
PLEASE
Why don't the particles in a solid move past one another?
A. They have no motion and cannot even vibrate in place.
B. They don't have enough energy to overcome the attractions
between them.
C. They bounce off the walls of their container and back into place.
D. They move independently of one another.
Answer:
B. They don't have enough energy to overcome the attractions between them.
Answer:They don't have enough energy to overcome the attractions
between them.
Explanation:
A. They have no motion and cannot even vibrate in place.
B. They don't have enough energy to overcome the attractions
between them.
C. They bounce off the walls of their container and back into place.
D. They move independently of one another.
2NazN + 3MgO -> Mg3N2 + 3Na2O, what is the mole ratio of magnesium oxide to magnesium nitride?
Answer:
3:1 or 3/1
Explanation:
Look at the coefficients then set up ratio. Simplify to the base numbers and you get 3/1 or 3:1. Thus, for every 3 MgO you produce 1 Mg3N2
The balanced chemical equation for the reaction of nitrogen (N2) and hydrogen (H) to form ammonia (NH3) is given below.
N2+ 3H2 + 2NH3
How many grams of hydrogen would be to react with 14.0 g of nitrogen?
Answer:
V= 33.6L
Explanation:
The reaction between hydrogen and nitrogen is
3H2(g) + N2(g) + 2NH3(g)
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
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-.
What happens to the average kinetic energy of gas particles as temperature increases?
Answer:
it dies
Explanation:cause its too cold
Hi! I wanted to know what my grade would be for my test. There are 23 questions in total. 2 of the 23 questions are essay questions that are worth 4 points each. I got two questions wrong that were worth 1 point each. Thank you!!
Answer:
high B or a low A:) Good Luck
Explanation:
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.
Meiosis does PMAT twice! That means there is prophase I and prophase II. There is metaphase I and metaphase II. If the cartoon below has chromosomes in the middle of the cell, how would you know whether it was in metaphase I or metaphase II?
Answer:
- there are homologous chromosomes in the middle of the cell (metaphase I)
- there are sister chromatids in the middle of the cell (metaphase II).
Explanation:
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.
What is the electronegativity difference between sodium and chlorine? What type of bond is this?
Answer:
Sodium chloride is ionically bonded. An electron has transferred from sodium to chlorine. Sodium has an electronegativity of 1.0, and chlorine has an electronegativity of 3.0.
...
The electronegativity difference between sodium and chlorine is 2.23 and the type of bond is ionic bond.
What is electronegativity?The tendency of an atom in a molecule to attract the shared pair of electrons towards itself is known as electronegativity.
Electronegativity is a kind of measure that tells how strongly atoms attract the bonding electrons to them.
Its symbol is a Greek letter that looks like an (X). It is directly proportional to the atom’s attraction for the electrons.
The compounds which form between the elements having a huge difference in the electronegativity are ionic compounds, and also have ionic bonding.
Electronegativity of Sodium = 0.93
Electronegativity of chlorine = 3.16
Difference = 2.23
The type of bond between them is ionic bond.
Therefore, The electronegativity difference between sodium and chlorine is 2.23 and the type of bond is ionic bond.
Learn more about Electronegativity, here:
https://brainly.com/question/17762711
#SPJ2