Answer:
Explanation:
Chemical weathering of rocks and minerals is a key factor that mitigates acidic deposition and affects water chemistry. It supplies cations and alkalinity to the surface water, groundwater, ion-exchange complex, and vegetation in the watershed.
Hopefully this will help
Living things are classified as producers or consumers according to
A) Their speed of movement
B) How they obtain food
C) The size of their communities
D) How they reproduce
Answer:
B
Explanation:
Your welcome! Have a great day!
Answer:
b
Explanation:
yw
Calculate the work done when 1.000 mole of a perfect gas expands reversibly from 1.0 L to 10 L at 298.0 K. Then, calculate the amount of work done when the gas expands irreversibly against a constant external pressure of 1.00 atm. Compare the two values and comment.
Answer:
See explanation
Explanation:
For work done at constant temperature;
w = -nRTln(V2/V1)
V1 = 1.0 L
V2 = 10 L
w = -(1 * 8.314 * 298) ln(10/1)
w = -5704.8 J
When the gas expands irreversibly against a constant external pressure;
w = -(PΔV)
w = -(1.00 (10 - 1))
w = - 9 J
During expansion of a gas in which the initial and final limits of volume are given, the constant pressure process produces more work than the isothermal process as we have seen above.
11. Calculate the number of atoms in 2.00g of platinum.
Answer:
Explanation:
All you need to know is the atomic mass of platinum, and Avogadro's number.
2.00g Pt divided by atomic mass gives you the moles of platinum, and multiplying by avogadro's number (6.022 x 10^23) gives you the number of atoms.
Atomic mass of platinum can be found on any periodic table.
Hope this helped.
12.04 × 10²³ number of platinum atoms are present in 2 grams of platinum.
How we calculate no. of atoms?To calculate the no. of atoms in any substance, we have to multiply the no. of moles of that substance by the Avogadro's no.
Value of Avogadro's no. = 6.022 × 10²³
We can calculate the mole by using the below formula:
n = W / M, where,
n = no. of moles
W = given mass = 2.00g
M = molar mass or atomic mass = 195.09 g/mol
n = 2 / 195.08 = 0.0102 mol
Number of atoms in 2.00g of platinum = 2 × 6.022 × 10²³ = 12.04 × 10²³.
Hence, number of atoms that are present in 2.00g of platinum is 12.04 × 10²³.
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Calculate the Molarity of NaOH in the
solution prepared by dissolving its 4 g
in enough water to form 250 ml of the
solution.
Explanation:
naoh=40g/mol
250ml=0.25dm°3
naoh in g/dm°3=16g/dm°3
naoh in mol/dm°3=16g\dm°3
________
40g/mol
=0.4mol,, is the answer
For the formula C4H9Cl , calculate the index of hydrogen deficiency (IHD) and select all the types of unsaturation that might be present in the molecule based on the IHD.
Answer:
IHD = 0; no unsaturation in the formula
Explanation:
The IHD is also known as the degree of unsaturation formula. This formula is commonly used to get an idea of how many unsaturations a molecule has, and in this way, we can get an approach of the type of compound we are treating. For example, if this number is 1, it means that the compound has at least one unsaturation and it could be a double bond or just cyclical compound.
The IHD is calculated using the following expression:
IHD = (a + 1) - (b + x - c)/2 (1)
Where:
a: number of carbon
b: number of hydrogens
c: humber of nitrogens
x: number of halogens.
Now, we have the formula C₄H₉Cl, let's identify a, b, c and x:
a: 4 carbons; b = 9 hydrogens; C = none; X: 1 chlorine
Replacing in (1) we have:
IHD = (4+1) - (9+1)/2
IHD = 5 - (10/2)
IHD = 0So this number is 0, which means that the molecule does not have any kind of unsaturation (Non double bond, multi bond or cyclical).
Hope this helps
What type of mutation occurred?
Original: ATT CAC
Mutated: ATC CAC
substitution (point)
insertion (addition)
deletion
Answer:
Insertions are mutations in which extra base pairs are inserted into a new place in the DNA. Deletions are mutations in which a section of DNA is lost, or deleted..Germline mutations occur in gametes. Somatic mutations occur in other body cells.Chromosomal alterations are mutations that change chromosome structure.Point mutations change a single nucleotide.Frameshift mutations are additions or deletions of nucleotides that cause a shift in the reading frame.Deletion is a type of mutation involving the loss of genetic material. It can be small, involving a single missing DNA base pair, or large, involving a piece of a chromosome.Base substitutions are the simplest type of gene-level mutation, and they involve the swapping of one nucleotide for another during DNA replication. For example, during replication, a thymine nucleotide might be inserted in place of a guanine nucleotide.Silent mutations are base substitutions that result in no change of the amino acid or amino acid functionality when the altered messenger RNA (mRNA) is translated. For example, if the codon AAA is altered to become AAG, the same amino acid – lysine – will be incorporated into the peptide chain..How many grams are in 2.095 x 1023 atoms of sodium?
Answer:
6.02 x 10∧23
Explanation:
there are 1.204 x 10^24 atoms of oxygen. How many moles is this?
Answer:
7.25 x 10^47
Explanation:
1.204 x 10^24 moles*6.022 x 10^23 avogadro's number= 7.25 x 10^
Two atoms of the element join together at ordinary temperature and pressure to generate dioxygen. Therefore, the correct option is option A.
What is oxygen?The chemical substance with symbol O as well as atomic number 8 is oxygen. It is a component of the periodic table's chalcogen group, a strong oxidizing nonmetal, as well as an oxidizing agent which quickly produces oxides for most elements and other compounds. Oxygen is the most prevalent element on Earth, and it is the third-most plentiful element in the universe after hydrogen and helium.
Two atoms of the element join together at ordinary temperature and pressure to generate dioxygen, a colorless as well as fragrant diatomic gas with both the formula O 2. Diatomic oxygen gas now makes up 20.95% of the Greenhouse effect, however this has fluctuated dramatically throughout time. Oxygen oxides represent more than half of both the Earth's crust.
mole = number of atoms/ 6.022×10²³
= 1.204 x 10²⁴/ 6.022×10²³
= 2 mole
Therefore, the correct option is option A.
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What do sodium and magnesium have in common?
Answer:
daddy will help
Explanation:
uhhhhhhhhhhhhhhhhhhh
What kind of solid is diamond (C)?
O A. Ionic solid
O B. Metallic solid
O C. Network solid
D. Molecular solid
Answer:
it will option C because it is formed by carbon chain
Find the mass in 34.4 liters of O2 gas at STP?
Answer:
mass of 1 mole of 34.4liters, O2, STP = 95.039999g
Explanation:
Write the problem as a mathematical expression.
Find the mass in 34.4liters of O2 gas at STP
To find the mass of 1 mole of 34.4liters, O2, STP look up the atomic mass of each element and multiply it by the number of atoms contained in each element in the molecule.
mass of 1 mole of 34.4liters, O2, STP = 2(mass of O) + (mass of S) + (mass of T) + (mass of P)
Fill in the atomic masses from the periodic table.
mass of 1 mole of 34.4liters, O2, STP = 2(16) + (32.06999969) + (0) + (30.96999931)
Simplify the result.
mass of 1 mole of 34.4liters, O2, STP = 95.039999g
hope this helps, good luck :)
also ive got no clue why the spacing looks all funny, sry about that
write short note on
a) steam distillation
b) distillation under pressure
c) fractional distillation
I hope it helps you ❤️❤️❤️❤️
Answer:
Steam distillation is a separation process which purifies isolate temperature-sensitive materials, such as natural aromatic compounds. In steam distillation, dry steam is passed through the plant material. These vapours undergo condensation and collection in receivers.
distillation under pressure is used for the purification of those substance which get decompose on their boiling point. so , a suction pump (vaccum) is fitted with a beaker in order to lower it's pressure, due to which boiling pressure decreases. so that it can be distilled of before reaching to its boiling point.
Fractional distillation is a type of distillation which involves the separation of miscible liquids. The process involves repeated distillations and condensations and the mixture is usually separated into component parts. The separation happens when the mixture is heated at a certain temperature where fractions of the mixture start to vaporize.
Explanation:
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help! help! plz............
1)What is most important of periodicity lest 4
2)why are energies of
various energy levels in hydrogen atomic are negative?
Please help
Write a balanced equation for each chemical reactions. Include appropriate symbols. First reactant formula is given.
Hydrochloric acid (HCl) reacts with Zinc to form hydrogen gas and zinc chloride.
2 HCl +
Acetylene gas (C2H2) burns in a welding torch with oxygen to form carbon dioxide gas and water vapor. 2 C2H2 (g) +
c. Silver nitrate plus calcium chloride (CaCll2) yields silver chloride and calcium nitrate. 2 AgNO3 +
d. Oxygen gas combines with hydrogen gas to produce liquid water. O2 +
e. Hydrogen peroxide decomposes into oxygen gas and water when it contacts blood. 2 H2O2
a. [tex]\mathrm{2HCl_{(aq)} + Zn_{(s)}} \rightarrow \mathrm{H_{2(g)} + ZnCl_{2(aq)}}[/tex]
b. [tex]\mathrm{2C_2H_{2(g)} + 5O_{2(g)}} \rightarrow \mathrm{4CO_{2(g)} + 2H_2O_{(g)}}[/tex]
c. [tex]\mathrm{2AgNO3_{(aq)} + CaCl_{2(aq)}} \rightarrow \mathrm{2AgCl_{(s)} + Ca(NO_3)_{2(aq)}}[/tex]
d. [tex]\mathrm{O_{2(g)}+2H_{2(g)}} \rightarrow \mathrm{2H_2O_{(\ell)}}[/tex]
e. [tex]\mathrm{2H_2O_{2(aq)}} \rightarrow \mathrm{O_{2(g)} + 2H_2O_{(\ell)}}[/tex]
what is a periodic table
Answer: The periodic table is a tabular array of the chemical elements organized by atomic number, from the element with the lowest atomic number, hydrogen, to the element with the highest atomic number, oganesson.
or
The periodic table, also known as the periodic table of elements, is a tabular display of the chemical elements, which are arranged by atomic number, electron configuration, and recurring chemical properties. The structure of the table shows periodic
Answer:
a chart or graph that tells you all the elements.
Explanation:
:)
Please write a essay and pick one prompt and at least half a page long thank you!
1. What are the physical and chemical properties of metals? Describe the carrot sticks of each and what each means.
2. Explain the difference between chemical and physical changes. Give to real-world examples of each.
Why is nitro group called an ambident group?
Answer:
An ambident ("both teeth") group is a group that can attach to another by either of two atoms. A nitro group can bond through either N or O. In organic chemistry, this property gives rise to functional group isomers.
Explanation:
Explanation:
An ambident ("both teeth") group is a group that can attach to another by either of two atoms. A nitro group can bond through either N or O. In organic chemistry, this property gives rise to functional group isomers.
Hope this is fine for you☺️☺️☺️HBrO3
A. All non metals “acid subcategory”
Many scientists think that this single event caused the extinction of most the dinosaurs which led to the rise of mammals which geologic principle is this an example of
A. Geographism
B. Gradualism
C. Catastrophism
D. Uniformitarianism
Answer:
C. Catastrophism
Explanation:
How can a ion become a anion ?
Answer:
Anions. Some atoms have nearly eight electrons in their valence shell and can gain additional valence electrons until they have an octet. When these atoms gain electrons, they acquire a negative charge because they now possess more electrons than protons. Negatively charged ions are called anions.
Explanation:
Can you give me brainliest?
How many grams of hydrogen are produced when 125 g of iron reacts with 125 g of water?
3 Fe + 4H2O ---> Fe3O4 + 4H2
5.95g
13.89g
111.11g
119.10g
xAl(OH)3 + yH2SO4 ⟶ zAl2(SO4)3 + kH2O?
Answer:
2Al(OH)3 + 3 H2SO4 = Al2(SO4)3 + 6H2O
Explanation:
What are the names of the stable forms of oxygen?
Answer:
18 O, 17 O, and 16 O
Explanation:
three naturally stable isotopes
The stable forms of oxygen are molecular oxygen ([tex]O_{2}[/tex]) and ozone ([tex]O_{3}[/tex]). Molecular oxygen is the most common form in the Earth's atmosphere, while ozone is found in the ozone layer of the atmosphere and has a different molecular structure than [tex]O_{2}[/tex].
The most stable type of oxygen in the Earth's atmosphere is [tex]O_{2}[/tex], sometimes referred to as molecular oxygen or dioxygen. It is made up of two oxygen atoms joined by a link.
Another stable form of oxygen is [tex]O_{3}[/tex], also referred to as ozone. It is a molecule made up of three linked oxygen atoms. The ozone layer in the stratosphere of the Earth contains ozone, which is essential for protecting life on the planet by absorbing damaging ultraviolet (UV) radiation from the Sun.
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after an extinction why do plants have to recover first?
Answer:
They are the first life there is and ever was. In order for any animals to live, the need nutrients, and plants have nutrients. they are the beginning of the food chain and also produce the right chemicals for the animals to survive
The temperature in mark’s town is 30 degrees Fahrenheit. The temperature in Vikki’s town is 82 degrees Fahrenheit. In both towns, the relative humidity is 90 percent. Is the amount of water vapor in the air the same in both towns?
Answer:
sorry don't know the answer but i really need the points sorry
Explanation:
Answer the following questions using the results of the following Unknown Solution Analysis:
Flame test: red flame Solutions reactions:
ammonium carbonate - white precipitate (ppt.) ammonium phosphate - white ppt. ammonium sulfate - white ppt. Halide test: purple hexane layer
a) What is the complete chemical name of the unknown ionic compound? (0.5 pt).
b) What is its correct chemical formula? (0.5 pt.)
Answer:
(a). strontium iodide.
(b). SrI2.
Explanation:
This question wants to test our knowledge on qualitative part of chemistry practical.
The first part is flame test which is a physical test. The flame test that was done on the com gave red flame.
Deduction: This confirms the presence of Strontium and Calcium.
The next thing is the chemical tests.
(1). Unknown + ammonium carbonate: gives white precipitate (ppt.).
Deduction: presence of Calcium and Strontium ions
(2). Unknown + Ammonium phosphate - white ppt.
Deduction: presence of Calcium and Strontium ions.
(3). Unknown sample + ammonium sulfate - white ppt.
Deduction: presence of Strontium ion confirmed.
(3). Halide test: purple hexane layer.
Deduction: shows the presence of Iodine.
Therefore, the final conclusion can be made as;
(a). The name of the chemical compound is strontium iodide.
(b). The chemical formula for the compound is SrI2.
Please put them in order for 15 points
Answer:
I forgot that but I think boron is first d ff\
Explanation:
What is the mass of 4.5 moles of sodium fluoride?
The partial pressure of F2 in a mixture of gases where the total pressure is 1.0 atm, is 0.33 atm. What is the partial pressure of the other gases in the container?
Answer:
Partial Pressure Formula
The total pressure of a mixture of gases can be defined as the sum of the pressures of each individual gas: Ptotal=P1+P2+… +Pn. + P n . The partial pressure of an individual gas is equal to the total pressure multiplied by the mole fraction of that gas.
Explanation:
Step 1: 2A⟶B+C slow Step 2: B+C⟶E fast Overall: 2A⟶E Determine the rate law for the overall reaction, where the overall rate constant is represented as .
Answer:
R=k[A]^2Explanation:
Steps mention in question are as follow.
Step 1: 2A <----> B ( fast)
Step 2: B + C ----> D (slow)
Overall: 2A + C ----> D
The slowest step is as follows
2A <----> B
Since the rate law is written as concentrations of reactants raised to power their stoichiometric coefficient multiplied by rate constant. Thus, rate law for this reaction can be written as follow.