The density of solid is 2730kg/m^3.
The amount of "stuff" in a certain amount of space is measured by its density. The definition of it is the mass per unit volume.
Given:
Total density = 2030kg/m^3
Water content = 25%
Gs= 2.73
Density of water = 1000kg/m^3
To find:
Density of solid = ?
Formula:
Dry density = moist density / 1 + water content
Density of solid = Gs x density of water
Calculations:
Density of solid = 2.73 x 1000
Density of solid = 2730kg/m^3
Dry density = 2030 / (1+0.25)
Dry density = 2030 / 1.25
Dry density = 1624kg/m^3
Result:
The density of solid is 2730kg/m^3 and the dry density of the soil is 1624kg/m^3.
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how many helium atoms have the same mass as 1 sulfur
HELP ASAP PLEASE!! GIVING BRAINLIEST!!
1. What information can the atomic emission spectra of a distant star yield for scientists?
A. chemical composition of the star
B. age of the star
C. number of electrons in the star
D. distance to the star
Explanation:
distance of the star ....
Answer:
number of electrons in the star
The number of seconds in a 40-hour work week can be
follows:
a. 60 s X
b. 1sx
1 min
60 s
1 min
60 s
X
X
lh
60 min
40 h
60 min
c. 40 h x
d. 40 h x
60 min
1h
60 min
40 h
X
X
60 s
1 min
60 s
60 min
The number of seconds in a 40-hour work week can be c. 40 h x
You work a regular 40-hour workweek (eight hours a day).
What is the foundation of the 40-hour work week?That persisted up until 1926, when Henry Ford let his workers off the hook for one day of obligatory labour. Eight-hour days and six-day weeks totaled 48 hours of labour each week for Ford employees. The 40-hour workweek, as it is currently known, was created by eliminating one day and replacing it with five days of eight-hour shifts.
Four nine-hour days followed by an eight-hour Friday is the most typical pattern for doing this. The next week consists of four nine-hour days and a Friday off.
A full-time employee is one who works an average of at least 30 hours per week for the duration of a calendar month in order to qualify under the employer shared responsibility laws.
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Write the chemical symbols for three different atomic cations that all have 22 protons.
Three different atomic cations that have 22 protons-
Cr2+Mn3+Fe4+Atomic cations are atoms that have a positive electric charge.
(Chromium) Cr has 24 protons therefore, Cr2+ has = 24 - 2 ⇒ 22 protons.
(Manganese) Mn has 25 protons therefore, Mn3+ has= 25-3 ⇒ 22 protons.
(Iron) Fe has 26 protons therefore, Fe4+ has= 26-4 ⇒ 22 protons.
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Cr²⁺, Mn³⁺ and Fe ⁴⁺ are the chemical symbols for three atomic cations with 22 electrons.
The number of protons inside the nucleus always remains constant.
∴Chemical symbol of three different atomic cation that have 22 electrons-
1. Cr²⁺
2.Mn³⁺
3. Fe⁴⁺
Atomic cation is the ion with positive electric charge on it, it means it should have more protons than electrons.
•Chromium (Cr) has 24 electrons therefore, Cr²⁺ will have = 24- 2 ⇒22 electrons (+2 charge means it will lose 1 electron from its outer shell)
•Manganese (Mn) has 25 electrons therefore, Mn³⁺ will have = 25-3⇒ 22 electrons. (+3 charge means it will lose 3 electrons from its outer shell)
•Iron (Fe) has 26 electrons therefore, Fe⁴⁺ will have = 26-4 ⇒ 22 electrons. (+4 charge means it will lose 3 electrons from its outer shell)
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Your question is incorrect. It should be - Write the chemical symbols for three different atomic cations that all have 22 electrons.
The first-order decomposition of n2o5 at 328 k has a rate constant of 1. 70 × 10-3 s-1. If the initial concentration of n2o5 is 2. 88 m, what is the concentration of n2o5 after 12. 5 minutes?.
Using the first-order decomposition rate constant, the concentration of [tex]N_2O_5[/tex] after 12.5 minutes is found to be 0.805M.
The concentration of just one reactant determines the outcome of a first-order decomposition process. Even if additional reactants are present, the rate is unaffected by their concentration.
Given:
Rate constant of first-order decomposition, k = 1.70 x [tex]10^-^3 s^-^1[/tex]
Initial concentration of [tex]N_2O_5[/tex] = 2.88 M
Time, t = 12.5 min = 750 s
To Find:
Final concentration of [tex]N_2O_5[/tex] = ?
Formula:
By using the Rate law,
-d[A] / dt = k[A]
Calculations:
ln[[tex]N_2O_5[/tex]]t = - kt + ln[[tex]N_2O_5[/tex]]
= - (1.70 x [tex]10^-^3 s^-^1[/tex]) x 750s + ln2.88
= - 1.275 + 1.058
= - 0.217
[tex]e^\(ln[N_2O_5]t[/tex] = [tex]e^\-0.217[/tex]
= 0.805M
Therefore, the concentration of [tex]N_2O_5[/tex] after 12.5 minutes is 0.805 M.
Result:
The concentration of [tex]N_2O_5[/tex] after 12.5 minutes of reaction is found to be 0.805M
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You are given two metal cubes that look similar. One has an edge of 3. 2 cm long and a mass of 43. 63 g. The other has an edge of 8. 34 cm long and a mass of 683. 5 g. How can you determine if both cubes are made from the same material? select the true statements.
By solving for the density of the two metal cubes, we can determine if both cubes are made from the same material.
Density, denoted by ρ, is a property of any substance that is defined as the ratio between the mass and volume of the substance.
ρ = m/v
where ρ = density
m = mass
v = volume
Solving the density of each cube.
Cube 1 :
ρ = m/v
ρ = m/e^3
ρ = 43. 63 g/(3. 2 cm)^3
ρ = 1.3315 g/cm^3
Cube 2 :
ρ = m/v
ρ = m/e^3
ρ = 683. 5 g/(8. 34 cm)^3
ρ = 1.1783 g/cm^3
If two objects have the same density, then they are made from the same material. Since the density of the two cubes are not equal, then they are not made form the same material.
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What do we call the one variable that we change in an experiment?
*
Assuming the sun's energy is radiated uniformly in all directions, calcualte the total power
Assuming the sun's energy is radiated uniformly in all directions, the total power is (π [tex]r . ^{2}[/tex] * σ[tex]R^{2} T^{4}[/tex])/[tex]r^{2}[/tex]
According to Stefan's law, if the sun were a perfect blackbody, its energy output per second would be:
P=σA[tex]T^{4\left \ }[/tex]
(Where P is energy radiated per second and A is the area of the sun.)
⇒P=σ×4π[tex]R^{2} T^{4}[/tex].............(1)
Assuming r>>r., the strength of this power at the earth's surface is
I= P/4π[tex]r^{2}[/tex]
⇒I= σ×4π[tex]R^{2} T^{4}[/tex]/4π[tex]r^{2}[/tex]
(Inserting the value obtained from equation (1))
⇒I= σ[tex]R^{2} T^{2}[/tex]/[tex]r^{2}[/tex]
Due to its great distance from the sun, the earth only receives a small portion of the energy that is radiated. The earth can be visualized as a little disc with a radius equal to that of the planet.
The disc's surface area is [tex]r .^{2}[/tex] hence the earth's total radiant energy as received is:
PE=π[tex]r. ^{2}[/tex]×I
P E = (π [tex]r . ^{2}[/tex] * σ[tex]R^{2} T^{4}[/tex])/[tex]r^{2}[/tex]
Assuming the sun's energy is radiated uniformly in all directions, the total power is (π [tex]r . ^{2}[/tex] * σ[tex]R^{2} T^{4}[/tex])/[tex]r^{2}[/tex]
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What levels of protein structure would be affected if all hydrogen bonding interactions were prevented?.
The levels of protein structure would be affected if all hydrogen bonding interactions were prevented are primary, secondary, tertiary, and quarternary structures.
There are 4 levels of protein structures:
Primary structures: Protein primary structure is the linear sequence of amino acids in a peptide or protein.
secondary structures: Protein secondary structure is the three-dimensional form of local segments of proteins.
tertiary structures: Protein tertiary structure is due to interactions between R groups in the protein.
quarternary structures: Protein quaternary structure is the fourth classification level of protein structure.
The levels of protein structure would be affected if all hydrogen bonding interactions were prevented are primary, secondary, tertiary, and quarternary structures.
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Identification of the mistake. of the nucleotides in the gene were changed as indicated in the mistake sequence, what type of mutation would this be? explain.
A silent mutation occurs as there is no change according to the blast alignment of the query and subject sequences.
Both the subject sequence's site 1557 and the query sequence's site 1557 are ‘A’. The double-stranded DNA sequence seen above is the sense (+) strand of the pmoc gene, which is predicted to encode pmoc. On translation of the silent mutation gene, the amino acid sequence for the gene is same - glutamine leucine threonine arginine proline arginine proline threonine glutamine alanine valine glycine alanine.
The protein product is unaffected by silent mutations. A nucleotide change still might code for the exact same amino acid as though it had not undergone mutation. The phenotype of both structure and function is maintained when amino acids are constant.
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A calorimeter initially contains 175.0 ml of water at 23.6oc. when 1.23 g na is added to the water, the temperature of the resulting solution rises to a maximum of 44.9oc. the reaction that occurs is:_________
A calorimeter initially contains 175.0 ml of water at 23.6oc. when 1.23 g Na is added to the water, the temperature of the resulting solution rises to a maximum of 44.9oc. the reaction that occurs is-2Na(s)+H2O(l)→2NaOH(aq)+H2(g).
A calorimeter is a tool used in the process of calorimetry, which determines heat capacity and measures the heat produced by chemical reactions or other types of physical changes. Differential scanning calorimeters, isothermal micro calorimeters, titration calorimeters, and accelerated rate calorimeters are a few of the most common types.
Simply put, a simple calorimeter is a metal container with a thermometer placed above a combustion chamber. It is one of the measurement instruments used in the research of chemistry, biochemistry, and thermodynamics.
The enthalpy change per mole of a material A in a reaction between two substances A and B is calculated by adding the components separately to a calorimeter and recording the beginning and final temperatures.
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Does a reaction occur when aqueous solutions of sodium sulfate and iron(ii) nitrate are combined?
No chemical reaction occurs on combination of sodium sulfate and iron (III) nitrate.
This chemical reaction does not occur since none of the products are solids, insoluble gases, or water. Just aqueous iron (III), sodium, nitrate and sulfate ions are present.
Thus, iron (III) nitrate and sodium sulfate do not interact.
One or more substances, known as reactants, are changed into one or more new substances, known as products, during a chemical reaction. Substances are made up of chemical components or chemical elements. The atoms that constitute the reactants of a chemical reaction are rearranged to create different products.
Combustion, decomposition, neutralization, redox, precipitation or double-displacement, and synthesis are some of the numerous types of chemical reactions that can occur depending on the product that is produced.
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Atom X has 8 more electrons than atom Y. Student 1 says they are in the same group. Student 2 says they are non reactive. Which students can be correct? student 1 student 2
Answer:
the answer is student 2
Explanation:
the student 2 has the right answer because student 1 is wrong
Atom X possesses eight more electrons than atom Y. Student 1 claims they are in the same class. Student 2 claims to be non-reactive. Students 1 and 2 are both correct.
What are Noble gases?On the far right side of the periodic table, the noble gases are a collection of six inert (nonreactive) gases. They belong to group 18, which is the final group on the periodic table. The atmosphere contains every one of the noble gases.While the other group 18 elements are present, they are significantly less abundant than argon, which makes up 0.934% of air. The noble gases are typically unreactive, nonflammable, tasteless, odorless, and colorless. These monatomic gases have the ability to glow and conduct electricity. Due to the minimal intermolecular interactions, all noble gases have exceptionally low melting and boiling points. Each one of them is pretty near to being an ideal gas. Noble gases are monatomic, which means that each "molecule" of the gas is only one atom, unlike halogens, which form molecules of many atoms.Therefore,
Consider Argon, According to the question, Atom X (such as Argon) has 8 more electrons than Atom Y.Argon has a proton number of 18, which is the same as the number of electrons.To get the element with the proton number 10 in the periodic table, subtract 18 from 8 to get 10.The proton number for neon is 10.To learn more about noble gases, refer to
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Do all of the atoms in buta-1,3-diene have to reside in the same plane? why or why not?
No, the atoms in buta-1,3-diene don't stay on the same plane due to steric repulsion, infract they change and rotate their planes and lie in separate planes.
What is same plane?
Since atoms with a pi bond cannot spin, they will all be in the same plane if they have a double or triple bond. The atoms also lie in the same plane if they are either trigonal or square planar.
Diatomic and triatomic molecules, as well as those that, with the exception of hydrogen, only exhibit sp2 and/or sp hybridization. Trigonal planar molecules (BF3) and typical diatomic molecules (CO2) will both be in the same plane.
The C-H bond twists as a result of sterric repulsion, moving the hydrogen atoms further from the molecular plane (like Ortho effect). However, there would be little to no sterric repulsions in the case of trans 1,3-butadiene, causing all atoms to lay in a single plane.
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What is the concentration of a solution made by diluting 95 ml of 6.0 m hcl to a final volume of 750 ml?
The new concentration of the solution of HCl diluted to 750 mL is 0.76 M
To solve this problem, the formula and the procedure that we have to use is:
c1 * v1 = c2 * v2
Where:
c1= concentration of the concentrated solution (M)v1 = volume of the concentrated solution(mL)c2 = concentration of the diluted solution(M)v2 = volume of the diluted solution(mL)Information about the problem:
c1 = 6.0 Mv1= 95 mLv2= 750 mLc2 = ?Applying the dissolution of concentrations formula and clearing the concentration of the diluted solution(c2), we get:
c1 * v1 = c2 * v2
6.0 M * 95 mL = c2 * 750 mL
c2 = (6.0 M * 95 mL) / 750 mL
c2 = 0.76 M
What is a dissolution?In chemistry a dissolution is known as a homogeneous mixture of two or more components called:
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How many protons, neutrons, and electrons are there if iron has an atomic number of 26, a mass number of 56, and a charge of +2?
The number of protons in an isotope atom does not change but the number of neutrons does. The iron atom has about twenty-eight isotopes. Such as 45Fe, 46Fe, 47Fe, 48Fe, 49Fe, 50Fe, 51Fe, 52Fe, 53Fe, 54Fe, 55Fe, 56Fe, 57Fe, 58Fe, 59Fe, 60Fe, 61Fe, 62Fe, 63Fe, 64Fe, 65Fe, 66Fe, 67Fe, 68Fe, 69Fe, 70Fe, 71Fe and 72Fe.
Among the isotopes, 54Fe (Observationally Stable), 56Fe, 57Fe, and 58Fe are stable and formed naturally. The remaining isotopes of iron are highly unstable and their half-lives are very short.
Isotope Mass number (A) Atomic number (Z) Neutron number = A – Z
45Fe 45.01458 26 19
46Fe 46.00081 26 20
47Fe 46.99289 26 21
48Fe 47.98050 26 22
49Fe 48.97361 26 23
50Fe 49.96299 26 24
51Fe 50.956820 26 25
52Fe 51.948114 26 26
53Fe 52.9453079 26 27
54Fe 53.9396090 26 28
55Fe 54.9382934 26 29
56Fe 55.9349363 26 30
57Fe 56.9353928 26 31
58Fe 57.9332744 26 32
59Fe 58.9348755 26 33
60Fe 59.934072 26 34
61Fe 60.936745 26 35
62Fe 61.936767 26 36
63Fe 62.94037 26 37
64Fe 63.9412 26 38
65Fe 64.94538 26 39
66Fe 65.94678 26 40
67Fe 66.95095 26 41
68Fe 67.95370 26 42
69Fe 68.95878 26 43
70Fe 69.96146 26 44
71Fe 70.96672 26 45
71Fe 71.96962 26 46
Answer:
Protons: 26
Neutrons: 30
Electrons: 24
Explanation:
C3H8(g) + 5O2(g) --> 3CO2(g) + 4H2O(g) + 2043.9 kJ
If 512 g of propane are burned in an automobile engine, the amount of energy released (to the nearest tenth) is __________ MJ.
The amount of energy released (to the nearest tenth) is 23.8 MJ
Balanced equationC₃H₈ + 5O₂ --> 3CO₂ + 4H₂O ΔH = 2043.9 KJ
Molar mass of C₃H₈ = (3 × 12) + (8 × 1) = 36 + 8 = 44 g/mol
Mass of C₃H₈ from the balanced equation = 1 × 44 = 44 g
Thus, we can say that:
From the balanced equation above,
44 g of propane were burned to release 2043.9 KJ of energy
How to determine the energy released by burning 512 g of propaneFrom the balanced equation above,
44 g of propane were burned to release 2043.9 KJ
Therefore,
512 g of propane will burn to release = (512 g × 2043.9 KJ) 44 g = 23783.56 KJ = 23783.56 / 1000 = 23.8 MJ of energy
Thus, 23.8 MJ of energy were released from the reaction
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HELP PLEASE ! Where do oil and natural gas come from? Make sure to include information about
the rock cycle, the history of life on Earth, fossils, and how fossils form.
What+were+the+bid+price+(in+$),+asked+price+(in+$),+and+yield+to+maturity+on+a+$1000+par+value+6.25%+may+2030+bond?+what+was+its+(asked)+price+(in+$)+on+the+previous+day?
Its asked price in$ on the previous day is the bid price is the sum a dealer offers to buy a bond at.
What is bid price?A bid price is the sum that a buyer is prepared to pay for a contract, commodity, asset, security, or other item, among other things. It is called a "bid" in many marketplaces and locations.
The "ask" price, which is the amount that sellers are willing to accept an offer, is often reduced by a bid. The bid-ask spread is the difference between the two prices.
Market makers may submit bids on securities on an ongoing basis or in response to a seller's request for a price at which they can sell. Unsolicited bids are those made by a bidder when a seller isn't actively trying to sell, which occasionally happens.
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Points !!!!!!!!!!!!
Answer:
Point A, Point B, and Point C
Explanation:
Collinear points means that they share the same line. Points A, B, and C all share the line m.
A compound with a peak in the mass spectrum at m/z 265 shows a 1:1 ratio between the molecular ion at 265 m/z and another ion seen at 267 m/z. the molecular formula is therefore ________.
C₁₂H₁₂BrO₁N₁ is the molecular formula.
An analytical technique used to measure the mass to charge ratio of the ions is known as mass spectrometry. This is one of the best technique used to analyse the structure of a molecule. It is used in a a lot of applications such as carbon dating, food contamination detection, isotope detection, protein identification etc.
We have given that,
molecular ion at 265 m/z
another ion seen at 267 m/z
their ratio is 1:1
C₁₃H₉Cl₂ON₁ in this in here Cl have two isotopes that are
36 and 37 but m/z is not equal to 265
in here C₁₂H₁₂BrO₁N₁ Br have two isotopes
Br-79, Br-81 and m/z equals to 256 and 257
so the molecular formula is therefore C₁₂H₁₂BrO₁N₁
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your question is incomplete, below you will find the missing content
here the options are not given, so options are
a. C₁₃H₉Cl₂ON₁ b. no isotopic atom c. C₁₂H₁₂BrO₁N₁
what’s the main difference between BaBr2 and SO2??
What is the molecular formula of a compound with the empirical formula c3h7 and a molar mass of 215.50 g/mol
The molecular formula of a compound with the empirical formula [tex]C_{3}H_{7}[/tex]and a molar mass of 215.50 g/mol is [tex]C_{15}H_{35}[/tex].
A substance's molecular formula describes the kind and number of atoms of each element present in a molecular compound. The empirical formula and the molecular formula are typically the same. The empirical formula for methane is [tex]CH_{4}[/tex] because it only contains one carbon atom, which is also its molecular formula.
The molecular formula is the most useful when you want to know how many atoms of each element are present in the molecule. Since it offers more details than the empirical formula, it is more common. The importance of the molecular formula increases while working with organic chemistry.
The formula for the molecular formula is the molar mass/ empirical formula
So, the empirical formula of [tex]C_{3}H_{7}[/tex]= C × 3 + H × 7
[tex]C_{3}H_{7}[/tex] = 12×3 + 1 × 7
[tex]C_{3}H_{7}[/tex] = 43
Then use the molecular formula = 215.50 / 43 = 5.01
Therefore, the molecular formula is 5 times the empirical formula which is [tex]C_{15}H_{35}[/tex].
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What three quantities/variables are needed in order to calculate the amount of heat (q) given off or absorbed during a chemical reaction?
Three quantities/variables are needed in order to calculate the amount of heat given off or absorbed during a chemical reaction are the substance, the process and the amount of substance.
When a substance in the same state absorbs heat, its temperature increases.
The amount of heat absorbed is proportional to the amount of the substance and the increase in temperature.
The amount of heat needed to raise the temperature of one gram of substance by 1°C is called the specific heat of that substance.
The specific heat of water is 4.18 J/g°C.
The amount of heat, q, absorbed by a given mass (m) of substance with specific heat, s, when its temperature increases by ΔT is given by the following formula: q = m × s × ΔT.
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The chemical formula:N2 would represent what type of substance
Answer:
it would represent sodium
The sides of a block measure 1.5 cm wide, 2 cm high, and 5 cm long. It's density is 0.7 g/mL. What is its mass?
Answer:
10.5 g
Explanation:
mass= vol × density
m= (1.5×2×5) × 0.7 g/mL
m= 15 × 0.7 g/mL
m= 10.5 g
i hope its correct^^!
4) What is the density of a metal block that has a mass of 270 grams and has a length of 5 cm, width of 3
cm, and a height of 2 cm
Answer:
P=9
Explanation:
Formula: P = M/V
First, we need to find the volume. This can be done by: 5 x 3 x 2 which will give us 30
Now we can plug it in
P= 270/30
P=9!
Solid kcn is added to a solution of 0.10 m ag and 0.10 m zn 2 until a precipitate forms. which will precipitate first?
AgCN will precipitate first.
Precipitation in chemistry is the formation of an insoluble chemical by the reaction of two salts or through temperature changes that affect the solubility of the compound. Additionally, the solid that results from a precipitation reaction is referred to as "precipitate."
Precipitation can be a sign that a chemical reaction has taken place, but it can also happen when the concentration of a solute is higher than its solubility. The process of small, insoluble particles aggregating with one another or forming an interface with a surface, such as a container wall or a seed crystal, is the precursor to precipitation and is known as nucleation.
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For unrestrained cube made from linear, isotropic, homogeneous material the temperature increase causes strain in_____ direction(s).
For unrestrained cube made from linear, isotropic, homogeneous material the temperature increase causes strain in (6,0) direction(s).
It is well known that for unrestrained cube made from linear, isotropic, homogeneous material the temperature increase causes strain in (6,0) direction(s). This is due to the fact that the cube is free to expand in all directions, and thus, the strain is evenly distributed throughout the cube. However, it is interesting to note that the strain in the (6,0) direction is actually slightly greater than in the other directions. This is because the (6,0) direction is the direction of the temperature gradient, and thus, the strain is greater in this direction.
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If 0.86 mole of mno 2 and 48.2 g of hcl react, how many grams of h20 will be produced?
11.8 grams of H₂O will be produced.
Balanced chemical equation:
MnO₂ + 4HCl → MnCl₂ + Cl₂ + 2H₂O
n(MnO₂) = 0.86 mol; amount of manganese(IV) oxide
m(HCl) = 48.2 g; mass of hydrochloric acid
n(HCl) = 48.2 g ÷ 36.5 g/mol
n(HCl) = 1.32 mol; amount of the acid
From balanced chemical equation: n(MnO₂) : n(HCl) = 1 : 4
Hydrochloric acid is limited reactant.
From balanced equation: n(HCl) : n(H₂O) = 2 : 1
n(H₂O) = 1.32 mol ÷ 2
n(H₂O) = 0.66 mol; amount of the water
m(H₂O) = n(H₂O) × M(H₂O)
m(H₂O) = 0.66 mol × 18 g/mol
m(H₂O) = 11.8 g; mass of the water
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