Answer:
Boiling point of water increases wben salt is added to the water this propertiy is known as elevation of boiling points
Explanation:
HF is a week acid. What particles would you expect to find in a solution of HF(aq)?
HF, H+ and F- particles
HF particles only
H+ and F- particles
H+ particles only
Answer:
HF, H+ and F- particles
Explanation:
The particles expected to be in an aqueous solution of a weak acid, HF, would be HF, H+ and F- .
A weak acid is one that does not dissociate completely in aqueous solutions. Hence, the dissociated particles are in equilibrium with the solution of the acid itself.
Thus, for weak acid, HF:
HF ⇌ H+ + F-
Choose the BEST answer from the four options A, B, C, or D: Due to which property of LPG are we asked to close the valve of the gas cylinder, in the kitchen in our homes? A. It is inflammable B. It is a liquid C. It has a bad smell D. It is a mixture
Answer:
A
Explanation:
We are usually asked to close the valve of the gas cylinder in our various kitchens at home due to the inflammable property of the Liquified Petroleum Gas.
Without closing the valve, the LPG would diffuse into our homes, and any form of spark would cause an explosion and lead to a fire. Lives and properties could be lost in the process.
The correct option is A.
What is the wavelength of a photon of light with an energy of 5.2 eV? Please answer in nm.
1 eV = 1.60 x 10-19 J
Speed of light -3.0 x 108 m/s
Planck's constant = 6.626 x 10-34 Js
How many atoms of N are in 0.755 mol of N2? ( mole conversion)
The number of atoms N in 0.755 mol of N₂ : 9.09 x 10²³
Further explanationThe mole is the number of particles(molecules, atoms, ions) contained in a substance
1 mol = 6.02.10²³ particles
Can be formulated
N=n x No
N = number of particles
n = mol
No = Avogadro's = 6.02.10²³
moles of N in 0.755 mol N₂ :
[tex]\tt 2\times 0.755=1.51~moles[/tex]
The number of atoms N :
[tex]\tt 1.51\times 6.02\times 10^{23}=9.09\times 10^{23}~atoms[/tex]
Which group contains the most elements?
a. Transition elements
b. Nonmetals
c. Metalloids
d. Metals
Answer:
it is metals, it is the most prominent type of element on the table
ANSWER
C,METALLIODS
SORRY PO KUNG MALI
#CARRYONLEARNING
A destructive change that is not caused by people
A. Climate
B. Natural disaster
C. Severe weather
D. Latitude
Answer:
Natural Disaster
Explanation:
Answer:
B and C
Explanation:
Natural disasters can be very destructive along with severe weather. Both mixed would be quite bad for us.
6. Glucose, C,H,O, is a kind of sugar
molecule. How many atoms are in a
molecule of glucose?
A.6
B. 12
C. 18
D. 24
which molecule in plants cells first captures the radiant energy from sunlight?
A. glucose
B. carbon dixide
C.chlorophyll
D.adenosine triphosphate
Answer:
c tell me if im wrong:)
Explanation:
:)
The molecule in plants cells first captures the radiant energy from sunlight is chlorophyll. The correct option is C.
What is chlorophyll?Chlorophyll, any of the pigments that participate in photosynthesis, the process by which light energy is converted to chemical energy through the synthesis of organic compounds.
Almost all photosynthetic organisms, including green plants, cyanobacteria, and algae, contain chlorophyll.
Chlorophyll is the name given to the green pigment used by plants to produce food during the photosynthesis process.
Chlorophyll is essential for photosynthesis, which allows plants to absorb light energy. Chlorophyll molecules are arranged in and around photosystems embedded in chloroplast thylakoid membranes.
Chlorophyll is the molecule in plant cells that first captures the radiant energy from sunlight.
Thus, the correct option is C.
For more details regarding chlorophyll, visit:
https://brainly.com/question/13500580
#SPJ2
What is the name of the revolutionary book Darwin published?
2) What does aerobic respiration mean?
a) Using oxygen to turn glucose into ATP
b) NOT using oxygen to turn glucose into ATP
c) digestion
d) Working out
Answer:
the answer is d gs5hkdr o
nvm
One proposed cause of warming climates is a drastic increase in carbon found in the air and oceans. Which of the following causes of weathering is also be caused by
increased carbon in the atmosphere?
A. acid rain
B. oxidation
C. exposure to salt water
D. ice formation
Answer:
Acid Rain
Explanation:
Carbon dioxide lowers the pH in the atmosphere, causing it to become more acidic, which can lead to acid rain. This is also why the oceans are becoming more acidic as more carbon dioxide builds up.
why is my family dissapointed in me?
Answer:
literally same im failing almost every class and i just know my dad hates me because of it
Explanation:
Can two elements be used as reactants for a synthesis reactions?
Answer:
Two or more elements or compounds combine to form one product.
Explanation:
Yes, two elements can be utilized as reactants for synthesis reactions.
Both components of something like the equations should have a similar number of particles. A synthesis reaction could sometimes produce upwards of two products, could also yield binary chemicals.Such reactions are also among the primary kinds of chemical processes, along with single/double displacement, as well as combustion processes.
Thus the above response is correct.
Learn more about synthesis reactions here:
https://brainly.com/question/10451730
Which sentence in the picture is true please help me with this
Answer:
C (top to bottom) or the 3rd one
Explanation:
Which of the following statements about glaciers is true?
A. A single alpine glacier covers the island of Greenland.
B. Alpine glaciers are usually larger than continental glaciers.
C. Continental glaciers cover immense areas of land.
D. All of these choices are correct.
Answer:
The correct answer is D.
Glaciers fall into two groups: alpine glaciers and ice sheets. Alpine glaciers form on mountainsides and move downward through valleys. The largest ice sheets, called continental glaciers, spread over vast areas. Today, continental glaciers cover most of Antarctica and the island of Greenland.
Explanation:
Brainliest please?
For the following unbalanced equation: Cu(s) + AgNO₃(aq) ➞ Cu(NO₃)₂(aq) + Ag(s) if 1.50 moles of copper and 3.00 moles of silver nitrate are available to react, how many grams of silver are produced? *
4 points
430 g Ag
324 g Ag
302 g Ag
108 g Ag
Three separate companies produce lye, a strongly basic compound used mainly to produce soap and detergents. Each company uses a slightly
different method but charges the same amount per gram of theoretical yield. The company with the highest efficiency will be the cheapest to
purchase from. You work for Dirt-Be-Gone, a detergent company and must choose which lye company to give a contract to. You purchase one
unit of lye from each company to compare their efficiency.
Company 1: Theoretical yield of 12,000 grams, actually produces 8,476 grams per reaction.
Company 2: Theoretical yield of 9,000 grams, actualy produces 7892 grams per reaction.
Company 3: Theoretical yield of 7,000 grams, actually produces 4885 grams per reaction.
Who will you choose to provide your company with lye?
A. Company 3
B. Company 2
C. All are equal
D. Company 1
I'll choose Company 2 to provide my company with lye
Further explanationGiven
Company 1 : Theoretical yield :12,000 grams, actually 8,476 grams
Company 2 : Theoretical yield :9,000 grams, actually 7892 grams
Company 3 : Theoretical yield :7,000 grams, actually 4885 grams
Required
compare their efficiency and choose the company
Solution
To determine which company to choose, we must calculate how much percent yield each company produces. The greater the yield, the greater the efficiency. The company that has the most efficiency will be selected
% yield can be formulated :
[tex]\tt \%yield=\dfrac{actual}{theoretical}\times 100\%[/tex]
Company 1[tex]\tt \%yield=\dfrac{8476}{12000}\times 100\%=70.63\%[/tex]
Company 2[tex]\tt \%yield=\dfrac{7892}{9000}\times 100\%=87.69\%[/tex]
Company 3[tex]\tt \%yield=\dfrac{4885}{7000}\times 100\%=69.79\%[/tex]
Company 2 has the most efficiency
(will mark brainliest) pls don’t scam - due today! these are my last points please answer
Answer:
A
Explanation:
It's know things
Answer:
Gregor mendel
Explanation:
He is considered by most the father of gentics
PLEASE HELP !!! WILL GIVE BRAINLIEST !!!!
A molecule that has a linear shape has two electron domains around the central atom. How many lone pairs of electrons are present around the central atom? zero one two three
Answer:
zero
Explanation:
help please in picture
Answer:
4 and 6
Explanation:
im not sure tho i dont nw much bout cs
Mr. Costas drank a bottle of beer (500g) containing 5% w / w alcohol, while Mr. George drank two drinks (50g each) vodka containing 40% w / w alcohol.
How much alcohol did each of them consume? Which of the two drank the most alcohol?
Mr George drank more alcohol than Mr Costas
Further explanation:Given
500 g beer , 5% w/w alcohol
100 g vodka, 40% w/w alcohol
Required
Number of alcohol consumed
Solution
Mr Costas drank :
[tex]\tt 5\%\times 500~g=25~g~alcohol[/tex]
Mr George drank :
[tex]\tt 2\times 50\times 40\%=40~g~alcohol[/tex]
Mr George drank more alcohol than Mr Costas
What is the mass of 4.5 moles of nitrogen gas
n = m / M
m = n × M
Nitrogen (N2) - a gas is always with an index 2 if we don't have shown how many molecules are there
m (N2) = 4,5 mol × (2×14.007 g/mol)
m (N2) = 4,5 mol × 28.014 g/mol = 126.063g
if you don't solve with the decimals in class just replace 14.007 with 14
also if you haven't learned abour gasses aways having index 2 then:
m (N2) = 4,5 mol × 14.007 g/mol = 63.0315g
A major component of gasoline is octane. When liquid octane is burned in air it reacts with oxygen gas to produce carbon dioxide gas and water vapor. Calculate the moles of octane needed to produce 2.40 mol of water. Be sure your answer has a unit symbol, if necessary, and round it to 3 significant digits.
Answer:
0.267 mol
Explanation:
The unbalanced equation for the reaction that takes place is:
C₈H₁₈ + O₂ → H₂O + CO₂Once we balance it we're left with:
2C₈H₁₈ + 25O₂ → 18H₂O + 16CO₂Using the stoichiometric ratio of water and octane from the balanced reaction, we can convert mol of water into mol of octane:
2.40 mol H₂O * [tex]\frac{2molC_8H_{18}}{18molH_2O}[/tex] = 0.267 mol C₈H₁₈Thus 0.267 moles of octane are needed to produce 2.40 mol of water.
in what organelle does photosynthesis occur
Answer:
chloroplasts
Explanation:
In plants, photosynthesis takes place in chloroplasts, which contain the chlorophyll. Chloroplasts are surrounded by a double membrane and contain a third inner membrane, called the thylakoid membrane, that forms long folds within the organelle.
Which statements below would be true about burning a piece of wood? Select all that apply.
Someone please help me with this question!!!
Answer: Element 1, 3, and 4
I hope this helps, and stay safe! :)
Answer:
1, 3 and 4
Explanation:
13
Help lol please thanks
Answer:
Mass = 15.13 g
Explanation:
Given data:
Number of atoms of hydrogen = 8.11×10²³
Mass of ammonia formed = ?
Solution:
Chemical equation:
3H₂ + N₂ → 2NH₃
Number of moles of hydrogen:
1 mole contain 6.022× 10²³ atoms
8.11×10²³ atoms × 1 mol / 6.022× 10²³ atoms
1.35 mol
Now we will compare the moles of hydrogen and ammonia:
H₂ : NH₃
3 : 2
1.35 : 2/3×1.35 = 0.89 mol
Mass of ammonia:
Mass = number of moles × molar mass
Mass = 0.89 mol × 17 g/mol
Mass = 15.13 g
4. The temperature of a fixed mass of gas in a rigid container is decreased from 127.00
degrees Celsius to 27.0 degrees Celsius. The initial pressure was 1.5 atm. Which is
closest to the new pressure after cooling?
A) 0.5 atm
B) 1 atm
C) 2 atm
D) 2.5 atm
Can you explain how you got the answer as well ?
Answer:
B) 1 atm
Explanation:
According to Gay-Lussac's law, the pressure of a given amount of gas at constant volume is directly proportional to its temperature (in Kelvin). This is mathematically expressed as:
P₁/T₁ = P₂/T₂
From the problem, we have the following data:
P₁= 1.5 atm
T₁= 127 °C + 273 = 400 K
T₂= 27 °C + 273 = 300 K
Thus, we calculate P₂ - final pressure - as follows:
P₂ = P₁/T₁ x T₂ = (1.5 atm)/(400 K) x 300 K = 1.125 atm
Therefore, the option which is closest to the new pressure after cooling is B) 1 atm
my dad make me cry by cutting onions. he was a good dog.
Answer:
what are talking about
Explanation:
im sry dude. :(((
Explanation:
What two things impact density of ocean water
Answer:
Temperature and salinity
Explanation:
