Answer:
C. Hydrogen Ions.
Explanation:
The pH level of soils is measured based upon the acidity or basicity level in the soil. The pH scale usually measures between 0-14. 7 is the neutral pH level of soil and a pH level below 7 is considered acidic and above 7 is alkaline.
So, soil with a high amount of hydrogen ions (H+) will be considered acidic. As the amount of hydrogen ions increases in the soil, the pH level of the soil decreases, making it acidic.
Therefore, option C is correct.
Which factor plays the most important role in allowing this reaction to occur?
what is the chemical formula for Sulphate...
Answer:
SO4²
Explanation:
Formula and structure: The sulfate ion formula is SO42- and the molar mass is 96.06 g mol-1. This salt is formed by one sulfate center to which 4 atoms of oxygen are attached, 2 of these atoms are forming S=O.
Answer:
[tex]so _{4} ^{2 - } [/tex]
Explanation:
sulfate is consisting of sulfur element with 4 oxygen as the structure in the pic given and this group is 2- charged
A hydrogen atom absorbs a photon radiation causing an electron to jump from level one to level two. If the photon/radiation has a wavelength of 5.62 x 10^-3 m to calculate the frequency of the radiation absorbed and the energy change of the electron
Answer:
1.
First of all, let's convert the energy of the absorbed photon into Joules:
The energy of the photon can be rewritten as:
where
h is the Planck constant
c is the speed of light
is the wavelength of the photon
Re-arranging the formula, we can solve to find the wavelength of the absorbed photon:
2. 1.24 eV
In this case, when the electron jumps from the n=4 level to the n=3 level, emits a photon with wavelength
So the energy of the emitted photon is given by the formula used previously:
and using
we find
converting into electronvolts,
Explanation:
Find the location of lithium (Li) on the periodic table. What type of ion will
lithium form?
A. An ion with a -7 charge
B. An ion with a -1 charge
C. An ion with a +7 charge
D. An ion with a +1 charge
Answer:
D. An ion with a +1 charge
Explanation:
The location of the lithium on the periodic table is in the first row, it is the third element. The type of ion that lithium form is An ion with a +1 charge. The correct option is D.
What is lithium?Lithium is the third element of the periodic table. Its atomic number is three. It is white with a silvery touch. It is a metal that is highly reactive and flammable. The element, lithium, has the highest binding tendency with other elements.
Lithium contains 3 protons and 3 electrons. When it loses a proton, it contains two ions. It is a metal, so it will donate electrons, therefore it will contain 1 + charge.
Thus, the correct option is D. An ion with a +1 charge. Lithium is the third element and is located in the first row of the periodic table.
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A compound whose empirical formula is NO₂ could have a molecular mass of? 23 g/mol 39 g/mol 92 g/mol 120 g/mol
The molecular formula of a compound gives the actual number of atoms of various elements present in one molecule of the compound. The molecular mass is 92 g/mol. The correct option is C.
What is empirical formula?The empirical formula of a compound can be defined as the formula which gives the simplest whole number ratio of atoms of various elements present in one molecule of the compound.
The molecular formula of a compound is a whole number multiple of its empirical formula.
Molecular formula = n × Empirical formula
The value of 'n' can be obtained from the relation:
n = Molecular mass / Empirical formula mass
Here the value of n = 2. Then,
Molecular mass = n × Empirical formula mass
Empirical formula mass of NO₂ = 45.8 g
2 × 45.8 = 91.6 ≈ 92 g/mol
Thus the correct option is C.
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Convert 1176 mmHg to kPa
Answer:
156.8kPa
Explanation:
The problem here is to convert mmHg to kPa;
We have been given:
1176mmHg and the problem is to convert to kPa;
1000Pa = 1kPa
1 mmHg = 133.322Pa
1176mmHg will give 1176 x 133.322 = 156787.1Pa
To kPa;
156.8kPa
Stephanie the Skydiver has a mass of 48kg, what is the force that she
exerts as she is falling to the ground?
Answer:
470.4N
Explanation:
Given parameters:
Mass of Stephanie = 48kg
Unknown:
Force she exerts while falling to the ground = ?
Solution:
The force she exerts is her weight;
Weight = mass x acceleration due to gravity
Now insert the parameters ands solve ;
Weight = 48 x 9.8 = 470.4N
Which of the following is a precipitate in the reaction below?
AgNO3 (aq) + NaCl (aq)
AgCl (s) + NaNO3 (aq)
Osodium nitrate
O silver chloride
O sodium chloride
O silver nitrate
Answer:
sodium chloride + silver nitrate = silver chloride
Explanation:
i believe this is correct, hope it helps :)
What is the molar mass of carbon (C)?
The molar mass of carbon (C) is 12.0107 u.
Answer:
Explanation:
The answer is 12.0107 u
Hope it helped you.
Plz mark me brainliest.
Please help
I will give a brainliest
THe correct answer is heat
Answer:
hi
Explanation:
heat
1:Krypton gain or lose electrons
2:Strontium gain or lose electrons
3:Xenon gain or lose electrons
Answer:
Krypton gain
strontium lose
xenon neither gain or lose
Why would one ball accelerate more than the other when pushed with the same amount of force?
Which elements are common to all organisms? Which ones apply??
A.sodium
B.oxygen
C. Sulfur
D. Hydrogen
E. iron
F. phosphorus
Answer:
B D
Explanation:
hope this is right but not entirely sure
Question 6 of 35
Which physical property is most helpful for separating a mixture of salt
dissolved in water?
A. Rate of solution
1
O B. Particle density
ООО
O
C. Boiling point
D. Magnetic attraction
Which feature is one of the defining features of a hurricane?
O funnel cloud
O high pressure
O low pressure
O rapid snowfall
Low pressure is one of the defining features of a hurricane. Therefore, the correct option is option C.
Hurricanes are intense tropical storms with spiralling winds, copious amounts of rain, and storm surges. These storms can pose a variety of issues when they hit land because they often occur over warm ocean waters close to the equator. Hurricanes leave a path of destruction in their wake, wrecking everything in their path from homes and infrastructure to creating severe flooding and landslides. The unpredictable nature of hurricanes is among their most worrisome features. Although modern technology and meteorological techniques have given us improved storm tracking and prediction systems, it is still challenging to correctly anticipate a hurricane's exact route and intensity.
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Can somebody help me please
Answer:
0.1139952 is the answer
Explanation:
what can an increase in energy do to a solid?
Please help me! U will get a 30 points!
Answer:
C
Explanation:
The stem and leaves need sunlight to undergo photosynthesis, they will grow in such a way until they receive some sunlight.
How do we view large areas of earth’s surface?
Answer: Are there options? I think the answer is continents, but I don't really understand the question. Is continents an option?
Explanation:
Which of the following is an example of a chemical change?
A. Boiling water
B. Burning paper
C. Dissolving sugar in water
D. Melting gold
Answer:
b.) burning paper
Explanation:
what is the concentration of a solution which is 2g in 150cm3 in g/dm3
The concentration of a solution : 13.3 g/dm³
Further explanationGiven
mass of solution = 2 g
volume = 150 cm³
Required
The concentration
Solution
The concentration of a substance can be expressed in several quantities such as moles, percent (%) weight/volume,), molarity, molality, parts per million (ppm) or mole fraction. The concentration shows the amount of solute in a unit of the amount of solvent.
Volume conversion : 150 cm³ = 0.15 dm³
the concentration : mass : volume = 2 g : 0.15 dm³ = 13.3 g/dm³
ILL GIVE YOU BRAIN LIEST IF YOU KNOW THE ANSWERS
Answer:B & C
tell me if im wrong
Answer:
Q 3 c it will reduce rate of photosynthesis in plants that live in the bottom of the lake
Q4 d the atom are in same group
This is right answer because these two elements are Lithium and neon Lithium is present in first group and Neon in last or group 18
Explanation:
Plss answer the question in the picture. If you actually answer I will give you brainilest!!!
Answer:
hey :)
your answer is D.
Explanation:
To find density, you must divide mass and volume.
8 divided by 4 is 2
6 divided by 6 is 0
4 divided by 2 is 2
hope i helped any :))
How many atoms are in 6.53 moles of zinc?
One mole of zinc contains 6.02 × 10²³ Zn atoms or formula units. Hence,6.53 moles of Zn contains 3.9 × 10²⁴ Zn atoms.
What is one mole ?One mole of a substance is its amount containing 6.02 × 10²³ atoms or molecules. This number is called Avogadro number. One mole of every elements contains Avogadro number of atoms.
Similarly one mole of every compound contains 6.02 × 10²³ molecules. The mass of one mole of compound is called its molar mass.
Zn is 30th element in periodic table. Zn is a transition metal. One mole of Zn contains 6.02 × 10²³ Zn atoms . Hence number of atoms of 6.53 moles is:
6.53 × 6.02 × 10²³ = 3.9 × 10²³ .
Hence, there will be 3.9 × 10²⁴ Zn atoms in 6.53 moles.
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Which statement accurately represents the properties of these moles.. help ASAP, teacher didn’t teach me this
Answer:
1 mole of O₂ has more mass compared to 1 mole of Na
Explanation:
1 mole oxygen atom and 1 mole of Na atom has the same number of particles.
A mole of any substance has the Avogadro number of particles which is
6.02 x 10²³
Mass of a substance = number of moles x molar mass
Molar mass of O₂ = 2(16) = 32g/mol
Molar mass of Na = 23g/mol
Mass of O₂ = 1 x 32 = 32g
Mass of Na = 1 x 23 = 23g
So, 1 mole of O₂ has more mass compared to 1 mole of Na
what is the empirical formula 63.0 g Rb and 5.90 g O.
Answer:
Explanation:
1st convert given data into % per 100wt...
Total system mass = 63.0g + 5.90g = 68.9g
%Rb = 63.0g/68.9g x 100% = 91.4% per 100wt
%O = 5.9g / 68.9g x 100% = 8.6%
Then follow the following sequence of calculations...
% => grams => moles => mole ratio => reduce to smallest whole no ratio => empirical ratio => empirical formula
%Rb = 91.4% => 91.4g/ 85.5g·mol⁻¹ =>1.069mole
%O = 8.6% => 8.6g/16g·mol⁻¹ => 0.5375mole
Rb:O => 1.069 : 0.5375
Reduce by dividing by the smaller mole value
1.069/0.5375 : 0.5375/0.5375 => 2 : 1 <=> empirical ratio
∴ Empirical Formula => Rb₂O
After attending his cousin's birthday party in his backyard, Michael forgot his balloon outside when he went to bed. Overnight, the temperature dropped significantly. When Michael saw the same balloon the next morning, it looked different. Why did this happen?
Answer:
See explanation
Explanation:
You see, we must cast our minds back to Charles' law. Charles' law gives the relationship between the volume of a gas and temperature of the gas.
Now, Micheal left the balloon outside at a particular temperature and volume the previous night. Overnight, the temperature dropped significantly and so must the volume of the gas in the balloon!
Remember that Charles' law states that, the volume of a given mass of gas is directly proportional to its absolute temperature at constant pressure. Since the pressure was held constant, the drop in the volume of gas in the balloon can be accounted for by the drop in temperature overnight.
What does it mean for energy to be conserved
Answer: It means that the energy is being stored or preserved to be used at a later time.
Your question was a little vague, so if this isn't the answer you were looking for, just let me know and I'll fix it.
Hope this helps! Good luck! :D
whats the unit for mass
Answer:
The unit for mass is the kilogram (Kg).
Explanation:
Hope this helped!! <3 good luckk!!
Why can Solids Support Objects Easier Than Fluids
Answer:
because the particles in solids are more close together and strong so they would support it better than fluid because fluid particles are spread out
Explanation:
Have A Wonderful Day !!
Due to properties of solid substances, they support objects easier than liquid.
Solids can support objects easier than fluids because in solid, particles are present on fix place as compared to liquid which is not fix and can move from one place to another. In Solid substances, particles are fix so they provides better support to the objects which are placed on them.
While on the other hand, in liquid substances particles are mobile so they are not considered better supporter for objects so we can conclude that due to properties of solid substances, they support objects easier than liquid.
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