Answer:
0.0032mm
Explanation:
Given dimension:
Measurement = 3.2 x 10⁻³mm
Unknown:
Write in standard notation from scientific notation = ?
Solution:
The standard notation is the way we normally write.
For example; standard notation of 1 million is 1000000
Now;
3.2 x 10⁻³ = [tex]\frac{3.2}{1000}[/tex] = 0.0032mm
3.2x10⁻³ mm in standard notation is 0.0032 mm. The normal or generally accepted manner of representing or expressing anything is referred to as standard notation.
Standard notation refers to the conventional or widely accepted way of representing or expressing something. In mathematics, for example, standard notation refers to the commonly used symbols and formats for writing mathematical expressions, equations, or numbers. The use of standard notation ensures uniformity, ease of understanding, and communication among mathematicians and students. Powers of 10 are used in scientific notation to express extremely large or extremely small quantities. 3.2x10⁻³ mm in standard notation is 0.0032 mm.
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1. How many moles of sulfur are in 40g of sulfur?
Answer:
1 sulfur
Explanation:
1 mole is equal to 1 moles Sulfur, or 32.065 grams
Answer:
[tex]\boxed {\boxed {\sf 1.24727159 \ moles \ of \ sulfur }}[/tex]
Explanation:
To convert from grams to moles, we must use the molar mass found on the Periodic Table of Elements.
1. Molar Mass
This is a sample of sulfur, so look for S on the table.
S: 32.07 g/mol2. Convert from Grams to Moles
Use the molar mass as a ratio.
[tex]\frac { 32.07 \ g \ S}{ 1 \ mol \ S }[/tex]
Multiply by the given number of grams: 40
[tex]40 \ g \ S * \frac { 32.07 \ g \ S}{ 1 \ mol \ S }[/tex]
Flip the fraction so the grams of sulfur will cancel each other out.
[tex]40 \ g \ S * \frac {1 \ mol \ S }{ 32.07 \ g \ S}=40* \frac {1 \ mol \ S }{ 32.07 }[/tex]
[tex]\frac {40 \ mol \ S } { 32.07 } = 1.24727159 \ mol \ S[/tex]
There are 1.24727159 moles of sulfur.
How many atoms make 3.42 moles of zinc (Zn)?
O 2.06 x 1024
65.38
1.76 x 1023
O 6.02 x 1023
Answer:
To obtain one mole of copper atoms (6.02 x 1023 atoms), ... mol Ag? (b) How many atoms of Ag are in 0.0342 mol Ag? 7 ... contain one S atom and two O atoms; calculate its molar mass.
A photon of light has an energy of 1.83 x 10-18). What is the wavelength of this light? Does this light fall in the IR, visible, or UV region of the electromagnetic spectrum?
Answer:
1.09 × 10⁻⁷ m
UV region
Explanation:
Step 1: Given and required data
Energy of the photon of light (E): 1.83 × 10⁻¹⁸ J
Planck's constant (h): 6.63 × 10⁻³⁴ J.s
Speed of light (c): 3.00 × 10⁸ m/s
Step 2: Calculate the wavelength (λ) of this photon of light
We will use the Planck-Einstein's relation.
E = h × c/λ
λ = h × c/E
λ = 6.63 × 10⁻³⁴ J.s × (3.00 × 10⁸ m/s)/1.83 × 10⁻¹⁸ J = 1.09 × 10⁻⁷ m
This wavelenght falls in the UV region of the electromagnetic spectrum.
What is the molarity of a CaCl2 solution containing 150g of CaCl2 in 400 mL?
Answer:
you have a 3.17molal solution: This is 3.17mol CaCl2 dissolved in 1 litre of water. Make this solution.
Molar mass CaCl2 = 110.9848 g/mol
3.17mol = 3.17*110.9848 = 351.822g
Total mass = 1000g H2O + 351.822g CaCl2 = 1,351.822g
Volume of this solution:
Volume = mass / density
Volume = 1,351.822/1.24
Volume = 1,090.2 mL
You have 3.17mol CaCl2 dissolved in 1,090.2 mL solution
Mol CaCl2 dissolved in 1000mL solution = 1000/1090.2*3.17 = 2.91 mol CaCl2
Molarity of CaCl2 solution = 2.91M
Explanation:
do guitar strings deform? and how??
Answer:
yes; and because of how roughly they are played.
Explanation:
Calculate the mass of lead (III) iodide, Pb13, that can be produced by the reaction of 135 g of lead, Pb,
and 338 g of iodine.
1. What is the limiting reactant?
2. How much product is formed?
Answer:
[tex]m_{PbI_3}=383.05gPbI_3[/tex]
Explanation:
Hello!
In this case, since the reaction between lead and iodine is:
[tex]2Pb+3I_2\rightarrow 2PbI_3[/tex]
We can see there is 2:2 and 3:2 mole ratio between each reactant and the product; in such a way, for the limiting reactant we must compute the moles of lead (III) iodide yielded by each reactant first:
[tex]n_{PbI_3}^{by\ Pb}=135gPb*\frac{1molPb}{207.2gPb}*\frac{2molPbI_3}{2molPb} =0.652molPbI_3\\\\n_{PbI_3}^{by\ I_2}=338gI_2*\frac{1molI_2}{253.81gI_2}*\frac{2molPbI_3}{3molI_2} =0.888molPbI_3[/tex]
Thus, the limiting reactant is lead because it yields the fewest moles of product. Next, we compute the mass of lead (III) iodide by multiplying the produced 0.652 moles by its molar mass:
[tex]m_{PbI_3}=0.652molPbI_3*\frac{587.91gPbI_3}{1molPbI_3} \\\\m_{PbI_3}=383.05gPbI_3[/tex]
Best regards!
QUESTION 20
A slice of pizza contains 17 g of fat, 25 g of carbohydrate, and an unknown amount of protein. If the piece of pizza contains a total of 750 kcal,
how many grams of protein does the slice of pizza contain? (The accepted caloric values for foods are 4.0 kcal/g for carbohydrate, 9.0 kcalg
for fat, and 4.0 kcal/g for protein.) Report the answer to 2 significant figures.
429
O Can not be determined from the given information.
O 649
O 749
120 g
Save All Answ
MacBook Pro
Answer:
Explanation:
Let the protein contained in pizza be m gram .
calories contained by 17 g of fat = 17 x 9 kcals = 153 kcals .
calories contained by 25 g of carbohydrate = 25 x 4 kcals = 100 kcals .
calories contained by m g of protein = m x 4 kcals = 4 m kcals .
Total calories of slice of pizza = 153 + 100 + 4m kcals
= 253 + 4m kcals
Given ,
253 + 4m = 750
4m = 497
m = 124.25 g .
120 g ( rounded to two significant figures )
How much electrical energy is required to generate 1.000L of H, at 25°C and 1.00 atm pressure by the electrolysis of water?
The electrical energy required : 0.082 F
Further explanationGiven
1.000L of H₂ at 25°C and 1.00 atm
Required
Electrical energy
Solution
Redox reactions in water electrolysis :
Anode: 2H2O (l) → O2 (g) + 4H⁺ (aq) + 4e
Cathode: 4H2O (l) + 4e → 2H2 (g) + 4OH⁻ (aq)
Reaction: 2H2O → 2H2 (g) + O2 (g)
mol H₂ :
n = PV/RT
n = (1 atm x 1 L)/(0.082 x 298)
n = 0.041
From reaction at cathode : mol ratio of electron and H₂ = 4 : 2, so mol electrons :
= 4/2 x mol H₂
= 2 x 0.041
= 0.082
1 Faraday is the amount of electricity that is passed in the electrolysis cell to obtain 1 mole of electrons.
1 Faraday = 1 mole of electrons = 96500 Coulombs
So the energy required :
0.082 Faraday
Explain the Rules that determine how electrons are arranged around the nuclei of atoms. Use examples to explain the rules/principles.
Viewed simply, electrons are arranged in shells around an atom's nucleus. Electrons closest to the nucleus will have the lowest energy. Electrons further away from the nucleus will have higher energy. ... In a more realistic model, electrons move in atomic orbitals, or subshells.
By definition:
there are 7 energy levelsthere are 4 sub-levelsAufbau's principle is a principle of atomic physics, which explains how electrons are accommodated in their orbits.Example: for hydrogen, its electronic configuration would be: 1s¹.The Electronic Configuration of the elements is the arrangement of all electrons of an element in energy levels and sub-levels (orbitals).
There are 7 energy levels, numbered from 1 to 7, and in which electrons are distributed, logically in order according to their energy level. Electrons with less energy will be spinning at level 1.
Each level is divided into sub-levels. These sub-levels into which each level is divided can be up to 4. These 4 sub-levels are called: s, p, d, f.
In the sub-level s there can only be a maximum of 2 electrons, in sub-level p there can be a maximum of 6 electrons, in the sub-level d 10 electrons and finally in the sub-level f there can be a maximum of 14 electrons.
Aufbau's principle is a principle of atomic physics, which explains how electrons are accommodated in their orbits around the nucleus of the atom. This principle states that the filling of these orbitals occurs in increasing order of energy, that is, from the orbitals of lower energy to those of higher energy.
The simplest of the sub-levels is 1s. If you fill the 1s you can start filling the 2s. After the 2s sub-level is satisfied, the 2p can begin to fill and so on. The order is:
1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁶6s²4f¹⁴5d¹⁰6p⁶7s²5f¹⁴6d¹⁰7p⁶
In this way, taking into account the atomic number Z of the element (which represents the number of protons of the element, and in a neutral atom it also indicates the number of electrons), the electrons that it has in the orbitals will be placed following the previously established.
For example, for hydrogen, whose atomic number is Z = 1, its electronic configuration would be: 1s¹.
Remember that the number 1 that precedes the representative letter of the orbital indicates the level of energy where the electron is located, the letter s indicates the type of orbital where the electron is located, and the exponent 1 indicates the number of electrons that are located in said orbital.
In summary:
there are 7 energy levelsthere are 4 sub-levelsAufbau's principle is a principle of atomic physics, which explains how electrons are accommodated in their orbits.Example: for hydrogen, its electronic configuration would be: 1s¹.Learn more:
https://brainly.com/question/5429660Many tests to distinguish aldehydes and ketones involve the addition of an oxidant. Only __________ can be easily oxidized because there is_________ next to the carbonyl and oxidation does not require _______
Answer:
AldehydesA hydrogen atomOxygenExplanation:
Many tests to distinguish aldehydes and ketones involve the addition of an oxidant. Only aldehydes can be easily oxidized because there is a hydrogen atom next to the carbonyl and oxidation does not require oxygen
what information do you obtain from molecular formula?
Answer:
Molecular formulas describe the exact number and type of atoms in a single molecule of a compound. The constituent elements are represented by their chemical symbols, and the number of atoms of each element present in each molecule is shown as a subscript following that element's symbol.
Explanation:
hope this helped !
Which of these would be affected
immediately, if energy from the Sun were
stopped?
F. the flying birds
G. the ability of wood to burn
H. the chemical reaction that makes ash
J. the growth of trees
Answer:
J. the growth of trees
Explanation:
The growth of trees would be greatly impaired if the energy from the sun were stopped.
Plants generally use the energy from the sun to obtain their nourishment. This same process makes food available in the ecosystem.
Plants are producers of food. The process of photosynthesis allows plants to manufacture food by using sunlight to drive the reaction between carbon dioxide and water to produce glucose and oxygen gas. The glucose is used by plant for nourishment.a client is to receive 2.00g of a drug. The drug comes on a solution that has 500 mg per 5.0 mL. Each vial contains 10 milliliters. How many vials do you need?
Please answer ASAP I’ll give the brainliest!
1. How many moles are in 3.63 x 1023 atoms of Mn?
2. Calculate the molar mass if AlBr3
3. Find the mass of 31.6 moles MnCI2
4. How many moles are in 5.6 L of KNO3?
5. How many moles are in 0.50 grams of CH3OH?
6. How many liters are in 8.20 x 10^14 molecules CsBr?
1. 1 mol=6.02.10²³ particles
[tex]\tt \dfrac{3.63\times 10^{23}}{6.02\times 10^{23}}=0.602~moles[/tex]
2. Molar mass = Total atomic mass of component
AlBr₃ = Ar Al + 3. Ar Br
AlBr₃ = 27 + 3. 80 = 267 g/mol
3. mass = mol x MW
MW MnCl₂ = 55 + 2.35.5=126 g/mol
mass = 31.6 x 126 =3981.6 g
4. at STP, 1 mol =22.4 L, so for 5.6 L :
[tex]\tt \dfrac{5.6}{22.4}=0.25~moles[/tex]
5. moles = mass : MW
MW CH₃OH = 12.1 + 4. 1 + 16.1 =32 g/mol
[tex]\tt moles=\dfrac{0.5}{32}=0.016[/tex]
6. 1 mol = 22.4 L at STP
1 mol = 6.02.10²³ particles
moles for 8.20 x 10¹⁴ molecules
[tex]\tt \dfrac{8.2\times 10^{14}}{6.02\times 10^{23}}=1.36\times 10^{-9}[/tex]
volume :
[tex]\tt 1.36\times 10^{-19}\times 22.4=3.05\times 10^{-8}~L[/tex]
In a solution, there is 1 g of NaCl for every 5 g of water.
What is the ratio of sodium to water?
Answer:
i dont know
Explanation:
sorry
Which would be the first of the two magnetic mentals in the mixture to be Melted? A. Copper B. Iron C. Nickel D. Yin
Answer:D. Tin
Explanation:
Which is least likely to occur after an experiment i conducted to test a hypothesis?
O The data is analyzed to see if it supports or refutes the hypothesis.
O The same experiment is conducted again to see if the data are reliable.
O The hypothesis becomes a theory if the results support it.
O Anew experiment is designed to provide additional data about the hypothesis.
Answer:
The hypothesis becomes a theory if the results support it is answer.
Explanation:
I hope it's helpful!
True or false: In a chemical reaction, atoms of elements cannot be present in the products if they were not present in the reactants.
A
True
B
False
Answer:
A
Explanation: Your answer is A true
Plate boundaries are places where which of these are known to occur?
a.volcanoes
b. earthquakes
c. trenches
d.mountains
e. all of the above
Answer:
all of the above
Explanation:
Which has the larger first ionization energy—magnesium or phosphorus?
a
Phosphorus has the greater first ionization energy.
b
Magnesium and phosphorus have equal first ionization energies.
c
Magnesium, but not phosphorus, has a measurable first ionization energy.
d
Magnesium has the greater first ionization energy.
Answer:
The correct option is a
Explanation:
First ionization energy is the minimum amount of energy required to remove the most loosely bound electron (valence electron) from the outermost shell of a gaseous or neutral atom. Since it takes more amount of energy to remove more electrons, it (ionization energy) generally increases across the period and decreases down a group because the closer the outermost shell is to the nucleus, the more difficult/energy required to remove electrons in that shell.
Since magnesium and phosphorus are on the same period (period 3), it can be deduced from the explanation above that phosphorus has a greater first ionization energy than magnesium because phosphorus (5 valence electrons) has more electrons in it's outermost shell than magnesium (2 valence electrons).
how does the mass and size of an atom compare to the mass and size of the nucleus
Answer:
Explanation:
The nucleus of an atom is about 10-15 m in size; this means it is about 10-5 (or 1/100,000) of the size of the whole atom. ... (10-15 m is typical for the smaller nuclei; larger ones go up to about 10 times that.) Mass. Although it is very small, the nucleus is massive compared to the rest of the atom.
Answer:
The nucleus of an atom is about 10-15 m in size; this means it is about 10-5 (or 1/100,000) of the size of the whole atom. ... (10-15 m is typical for the smaller nuclei; larger ones go up to about 10 times that.) Mass. Although it is very small, the nucleus is massive compared to the rest of the atom.
Explanation:
determine the mass of 840 cm3 of oxygen gas, O2 at rtp
Answer:
Mass = 0.96 g
Explanation:
Given data:
Volume of oxygen = 840cm³
Temperature = at room = 25°C
Pressure = at room = 1 atm
Mass of oxygen = ?
Solution:
Volume of oxygen = 840 cm³ × 1 L /1000 cm³ = 0.84 L
Temperature = 25 +273.15k = 298.15 K
Formula:
PV = nRT
n = PV/RT
R = 0.0821 atm.L/mol.K
n = 1 atm × 0.84 L / 0.0821 atm.L/mol.K × 298.15 K
n = 0.84 atm.L / 24.48 atm.L/mol
n = 0.03 mol
Mass of oxygen:
Mass = number of moles × molar mass
Mass = 0.03 mol × 32 g/mol
Mass = 0.96 g
11. What is deceleration also called?
negative velocity
negative acceleration
negative speed
positive stopping
Explanation:
it is negative acceleration
Answer:
negative acceleration
Explanation:
HELP ASAP PLEASEEEEE!!!!! (serious answers only or i’ll report)
Mg(s)+2HCl(aq)—>MgCl2(aq) + H2(g)
what is the order of the reaction between magnesium and hydrochloric acid, with respect to magnesium?
Answer:
1st order
Explanation:
because magnesium has a coefficient of 1, it is first order
hydrochloric acid has a coefficient of 2, so it is second order
overall the reaction is third order (1+2)
A living thing must respond to the environment, has needs, grows, must be 1 point
able to reproduce, breathes/respirates, and is made of one or more cells. *
True
False
PLZ HURRY GIVING 35 POINTS
Do you think the amount of the liquid changes how acidic or basic it is? Explain your thinking.
I'll give brailiest.
Answer:
yes, the cells in the liguid is all congrating together.
Explanation:
Science Experiment : What can you fit in your mouth?
Answer:
u got a me off guard and thought sum else, lol but um a marble?
Explanation:
A 1% solution of Ivermectin contains how many mcg per mL?
Ivermectin is present at doses of 10 mg per mL, which is adequate to treat 110 lb (50 kg) of body weight (maximum 10 mL per injection site.).
What is Ivermectin ?
Antiparasitic medication ivermectin is used. It was first used in veterinary medicine to prevent and treat heartworm and acariasis after being discovered in 1975.
A steroid is not ivermectin. Drugs called steroids behave similarly to cortisol and work to reduce edoema in the body. Prednisolone, betamethasone, and other typical steroids are listed below. Ivermectin, on the other hand, is an anthelmintic medication.
Barbiturates (such as phenobarbital and butalbital), benzodiazepines (such as clonazepam and lorazepam), sodium oxybate (GHB), and valproic acid are a few of the medications that may interact with this medication.
Thus, Ivermectin is present at doses of 10 mg per mL, which is adequate to treat 110 lb (50 kg) of body weight (maximum 10 mL per injection site.)
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a piece of tin foil has a volume of 0.645 ml to the 3rd if a piece measures 10.0 mm by 12.5 m what is the thickness of the foil
Explanation:
Fundamentally the aluminum foil is a rectangular prism. It has a length, a width, and a thickness.
The volume of a rectangular prism is expressed as
[tex]V = l * w * h[/tex]
If we know the volume and two of the three dimensions, we can rearrange the equation to solve for the thickness.
[tex]h = V/(l*w)[/tex]
But we should also be sure to confirm our units.
A liter is defined as 1000 cm^3. Therefore a mL is equal to 1 cm^3.
You should convert the units of measure given in the problem statement such that the units are aligned. For example, 10.0mm will be 1 cm and 12.5m will be 1250 cm. This will give you a height in cm.
