Answer:
.3
Explanation:
Hellpppp I need help i don’t get this at all please help!!
Answer:
I'm pretty sure it's the second one that it contains fewer oxygen atoms
How to frick a chicken...
Answer:uhhhhh should I be concerned
Explanation:
Answer:
hmmm o_O Maybe you... shouldnt
Help can someone do this for me
Answer:
Magnesium Mg 12 12
Phosphorous P 15 15
Flourine F 9 9
Iron Fe 26 26
Calcium Ca 20 20
Flourine F 9 9
Explanation:
Answer:
Magnesium Mg 12 12
Phosphorous P 15 15
Fluorine F 9 9
Iron Fe 26 26
Calcium Ca 20 20
Fluorine F 9 9
Which sentence most accurately describes electrically charged objects?
A. They are attracted to one other without coming into contact.
B. They are negatively charged objects that are attracted to each other.
C. They attract or repel other charged objects without touching them.
D. They attract other objects after they have been in contact with them.
Answer:
A.
Explanation:
In conclusion, an electrically neutral object is an object that has a balance of protons and electrons. In contrast, a charged object has an imbalance of protons and electrons. ... The type of charge(positive or negative) is determined by whether the protons or the electrons are in excess
Dear God, the person reading this is kind and I’m proud of them . Please help them live life to the fullest and bless her in their chosen field. Now, you’re on the clock.❤❤❤ In 9 minutes something will make you happy. Please share this with 15 people you love. Remember, . If I don’t get this back I’m obviously not a close friend. Now, I have a game for you, it’s been played since 1977. Once you read this, you have to send it to 15 people. Your next 5 days will be like this: Day 1 - you will wake up to the biggest shock of your life. Day 2 - you will cross paths with an old friend you have missed. Day 3 - you will find yourself with a lot of money. Day 4 - your day will be perfect. Day 5 - the person u like the most in your life will spend lots of time with you. If you don’t forward this, your next 5 days will be the exact
Which of the following is a true statement?
Often, fossil remains of a large complex animal are complete.
Often, fossil remains of a small simple animal are complete.
Often, fossil remains of a large complex animal are incomplete.
Often, fossil remains of a small simple animal are incomplete.
Answer:
i think its C
Explanation:
In an experiment, a 88.11 mL sample of unknown silver nitrate solution was treated with 9.753 g of sodium chloride, resulting in 4.576 g of precipitate. Calculate the molarity of the silver nitrate solution
Answer:
[tex]M=0.362M[/tex]
Explanation:
Hello!
In this case, according to the following chemical reaction:
[tex]AgNO_3(aq)+NaCl(aq)\rightarrow AgCl(s)+NaNO_3(aq)[/tex]
It is possible to compute the moles of silver nitrate via stoichiometry that produced 4.576 g of silver chloride as shown below:
[tex]n_{AgNO_3}=4.576gAgCl*\frac{1molAgCl}{143.32gAgCl}*\frac{1molAgNO_3}{1molAgCl}\\\\n_{AgNO_3}=0.03193molAgNO_3[/tex]
Thus, since the molarity is obtained by dividing moles by volume, we obtain:
[tex]M=\frac{0.03193mol}{0.08811L}\\\\M=0.362M[/tex]
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Iron garden tools were left outside over the winter. When found, They appeared dirty with spots of reddish-brown, flaky substance. Was this a physical or chemical change? How do you know?
Answer:
Chemical change
Explanation:
The reddish-brown substance is rust. Rust is a chemical change because rust is a different kind of matter than the iron, oxygen, and water present before the rust formed. The explosion of nitroglycerin is a chemical change because the gases produced are very different kinds of matter from the original substance.
What is a number at the bottom right of an element in a chemical equation called?
Answer:an element in a chemical equation is called a subscript.
Explanation:
it represents the the number of atoms of that element present in the compound. hope this helps have a great day yall
The number at the bottom right of an element in a chemical equation is called a subscript.
Subscripts represent the number of atoms of that particular element in a molecule or formula unit. They indicate the ratio of atoms or ions present in a compound. Subscripts are written in a smaller font size and appear slightly below the element's symbol.
For example:
In the chemical compound water [tex](H_2O)[/tex],the subscript '2' indicates that there are two atoms of hydrogen (H) bonded to one atom of oxygen (O). The subscript specifies the ratio of elements in the compound, indicating that there are two hydrogen atoms for every one oxygen atom in water.
Therefore, the term subscript refers to the number on the right of an element in a chemical equation.
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PLEASE HELP ME! THANK YOU IF YOU DO!!! ^^
Answer:
oceanic formation is the right answer.
Explanation:
this os becoz they slide a past each other and do not rub against each other
5) Calculate the molality of 0.210 mol of KBr dissolved in 0.075kg pure
water?
Answer:
[tex]\boxed {\boxed {\sf 2.8 \ m }}[/tex]
Explanation:
The formula for molality is:
[tex]m=\frac{moles \ of \ solute}{kg \ of \ solvent}[/tex]
There are 0.210 moles of KBr and 0.075 kilograms of pure water.
[tex]moles= 0.210 \ mol \\kilograms = 0.075 \ kg[/tex]
Substitute the values into the formula.
[tex]m= \frac{ 0.210 \ mol }{0.075 \ kg}[/tex]
Divide.
[tex]m= 2.8 \ mol/kg= 2.8 \ m[/tex]
The molality is 2.8 moles per kilogram
In order to construct a Beer's law plot in this experiment, a stock solution of dye must be diluted to multiple different concentrations. Calculate the concentration, in M, of dye when 5.73 mL of 0.443 M Allura Red dye is diluted with 20.26 mL of distilled water. Assume simple dilution only. Note: Do not use scientific notation or units in your response. Sig figs will not be graded in this question, enter your response to four decimal places. Carmen may add or remove digits from your response, your submission will still be graded correctly if this happens.
Answer:
0.0977M is the concentration of the final solution
Explanation:
In a dilution process, to the original solution (Stock solution) you add more solvent in order to decrease its original concentration. To know how many times the solution was diluted you must find the dilution factor (Ratio between the initial and final volume). That is:
Intial Volume: 5.73mL
Final volume: 5.73mL + 20.26mL = 25.99mL
Dilution factor: 25.99mL / 5.73mL = 4.536 → 4.536 times the solution is diluted. The concentration of the diluted solution is:
0.443M / 4.536 =
0.0977M is the concentration of the final solutionThe concentration of the solution is 0.099 M.
We have to use the dilution formula here;
C1V1 = C2V2
Where;
C1 = initial concentration
C2 = final concentration
V1 = initial volume
V2 = final volume
Now;
C2 = C1V1/V2
C2 =0.443 M × 5.73 mL / (5.73 mL + 20.26 mL)
C2 = 0.099 M
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Please, someone, help me to answer the last question Q1: asp? 70points
Answer:
tendría que ser 10.?e :
.0
Calculate the molar concentration of a solution containing 33.8 grams of NaCl in 0.850 liters of water. The molar mass of NaCl is 58.44 g/mol.
Answer:
0.680 M
Explanation:
Step 1: Given data
Mass of NaCl (m): 33.8 gVolume of water: 0.850 L (We will assume this is the volume of the solution as well)Molar mass of NaCl (M): 58.44 g/molStep 2: Calculate the moles of NaCl (solute)
We will use the following expression.
n = m/M
n = 33.8 g/(58.44 g/mol) = 0.578 mol
Step 3: Calculate the molar concentration of NaCl
Molarity is the number of moles of solute divided by the liters of solution.
M = n/V = 0.578 mol/0.850 L = 0.680 M
calculate the modaliti of 2.89 of NaCI dissolved in 0.159 L of water (Given Density of water is 1.00 g/mol)
Answer:
[NaCl] = 0.31 m
Explanation:
Molality is a sort of solute's concentration, that indicates the moles of solute contained in 1kg of solvent.
In this problem:
solute → NaCl
solvent → H₂O
We need the mass of solvent in kg and we have the volume, so let's convert the volume to mass by the use of density.
1 g/mL = mass / 159 mL
(Notice we needed to convert the volume from L to mL)
159 g is the mass of water. We convert to kg
159 g . 1 kg/1000 g = 0.159 kg
We convert the mass of solute to moles → 2.89 g . 1mol/ 58.45 g = 0.049 moles of NaCl
Molality → mol/kg → 0.049 mol /0.159 kg = 0.31 m
what do liquid methane and liquid water have in common
Answer:
methane on the other hand is made of one carbon atom and 4 hydrogen atoms. like water, the bonds are covalent.
Liquid methane and Liquid water are both covalent compounds, thus, they both have covalent bonds in common.
What is methane?Methane is a covalent compound which exists as a gas at room temperature.
Methane is composed of four hydrogen atoms and a carbon atom linked together by covalent bonds.
What is water?Water is a covalent compound which exists as a liquid at room temperature.
Water is composed of two atoms of hydrogen and one atom of oxygen linked together by covalent bonds.
What do liquid methane and Liquid water have in common?Since both liquid water and liquid methane are covalent compounds, they both have covalent bonds in common.
Therefore, liquid methane and liquid water have covalent bonds in common.
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What does literal mean in science please hurry it's due at 11:40!!
Answer:
In computer science, a literal is a notation for representing a fixed value in source code. An anonymous function is a literal for the function type. In contrast to literals, variables or constants are symbols that can take on one of a class of fixed values, the constant being constrained not to change.
Explanation:
Directions: Using the words inside the box, fill in the blanks to complete the thought of the paragraph.
There are six main requirements for a typhoon to form and develop. It needs an abundance of ______(1)_________. The ______(2)_________ must have a temperature of 26.5ºC spanning from the surface up to a depth of at least 50 meters (160 ft.) or more. Another requirement is to have too much water vapour present in air known as _______(3)________. The low vertical wind shear also contributes to the formation of typhoon. It also needs an _________(4)_________ for typhoon development which is 500 km (300 mi) from the equator. The ______(5)_________ causes the powerful wind to spin at this particular region. If any one of these requirements were below average or minimum, a tropical cyclone would not form.
Answer:
There are no options but the answers are:
Unstable atmosphere and vertical motionOcean watersRelative humidityAn existing distance/ pre-existing disturbanceCoriolis forceExplanation:
There are six main requirements for a typhoon to form and develop. It needs an abundance of unstable atmosphere/ vertical motion. The ocean waters must have a temperature of 26.5ºC spanning from the surface up to a depth of at least 50 meters (160 ft.) or more. Another requirement is to have too much water vapor present in air known as relative humidity. The low vertical wind shear also contributes to the formation of typhoon. It also needs an existing distance/pre-existing disturbance for typhoon development which is 500 km (300 mi) from the equator. The Coriolis force causes the powerful wind to spin at this particular region.
If any one of these requirements were below average or minimum, a tropical cyclone would not form.
Is CaO binary or polyatomic?
Answer:
It is going to be binary
Explanation:
Difference between n-propyl and isopropyl radicals.
Answer:
Isopropyl has the specific orientation of being attached to a central carbon atom with two CH3 molecules attached (so in IUPAC naming it can become dimethylethyl), whereas propyl is three carbons all attached in a line branching off the main carbon chain, so it's two CH2 molecules and one CH3 molecule.
Explanation:
n-propane are longer chain hydrocarbon whereas isopropane is branched hydrocarbon. Isopropyl radical is more stable than n-propyl radical.
What are radicals ?Radicals are reaction intermediates containing one unpaired electron. They are highly reactive species . The stability of radicals depends on the structure and reaction condition.
n -propyl radical is CH₃-CH₂-CH₂·
Isopropyl radical is written as CH₃-CH·-CH₃
The isopropyl group contains a branch in the second carbon and its makes the central carbon with secondary structure.
The stability of tertiary radicals is greater than secondary which is greater than primary. Therefore, isopropyl radical is more stable than n -propyl radical.
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what is a jump start that can speed up the decomposition reaction in soda
Answer:
you have to shake the soda up
What would be the wavelength of light that has a frequency of 3 X
10-4 Hz in a vacuum?
Answer:
[tex]\lambda=10^{12}\ m[/tex]
Explanation:
Given that,
The frequency of the light, [tex]f=3\times 10^{-4}\ Hz[/tex]
We need to find the wavelength of the light.
The relation between frequency, wavelength and the speed of light is given by :
[tex]c=f\lambda\\\\\lambda=\dfrac{c}{f}\\\\\lambda=\dfrac{3\times 10^8}{3\times 10^{-4}}\\\\\lambda=10^{12}\ m[/tex]
So, the wavelength of the light is [tex]10^{12}\ m[/tex].
The wavelength of light will be "[tex]10^{12} \ m[/tex]"
Given:
[tex]f = 3\times 10^{-4} \ Hz[/tex][tex]c = 3\times 10^8[/tex]By using the relation,
→ [tex]\lambda = \frac{c}{f}[/tex]
By putting the values, we get
→ [tex]= \frac{3\times 10^8}{3\times 10^{-4}}[/tex]
→ [tex]= 10^{12} \ m[/tex]
Thus the above response is right.
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How do you name ethers in chemistry?
Answer:
Common names of ethers simply give the names of the two alkyl groups bonded to oxygen and add the word ether. The current practice is to list the alkyl groups in alphabetical order (t-butyl methyl ether), but older names often list the alkyl groups in increasing order of size (methyl t-butyl ether).
Explanation:
Hope it is helpful.......
Given a sample of poly[ethylene-stat-(vinyl acetate)] A.Calculate the mean repeat unit molar mass for a sample of poly[ethylene-stat-(vinyl acetate)] that comprises 12.9 wt% vinyl acetate repeat units.B.Given that its number-average molar mass is 39,870 g/mol, calculate the number-average degree of polymerization of the copolymer.
Answer:
a) The mean repeat unit molar mass for PEVA is 30.72 g/mol
b) degree of polymerization of the copolymer is 1300
Explanation:
Given that;
the wt% of copolymer consist of 12.9 wt% of vinyl acetate and 87.1 wt% Ethylene.
Basis: 100 g of PEVA consist of 12.9 of vinyl acetate and 87.1g of Ethylene.
now we calculate the mole fraction of vinyl acetate Ethylene in the copolymer;
the molecular weights of vinyl acetate and ethylene are 86.09 g/mol and 28.05 g/mol respectively
so
moles of vinyl acetate = wt. of vinyl acetate / molecular weights of vinyl acetate
moles of vinyl acetate = 12.9 g / 86.09 g/mol
moles of vinyl acetate = 0.1498 mol
moles of Ethylene = wt. of Ethylene / molecular weights of Ethylene
moles of Ethylene = 87.1 g / 28.05 d/mol
moles of Ethylene = 3.1052 mol
Total moles = 0.1498 mol + 3.1052 mol = 3.255 mol
Next we calculate the mole percent;
mole percent of vinyl acetate [tex]X_{V}[/tex] = moles of vinyl acetate / total moles
[tex]X_{V}[/tex] = (0.1498 mol / 3.255 mol) × 100
[tex]X_{V}[/tex] = 4.6%
mole percent of Ethylene [tex]X_{E}[/tex] = moles of Ethylene / total moles
[tex]X_{E}[/tex] = (3.1052 mol / 3.255 mol) × 100
[tex]X_{E}[/tex] = 95.397% ≈ 95.4%
we know that, mean repeat unit molar mass for a sample = ∑[tex]X_{i}[/tex][tex]M_{i}[/tex]
where [tex]X_{i}[/tex] is the fraction ratio and [tex]M_{i}[/tex] is the molecular weight
so or the PEVA
mean repeat unit molar mass M = ( [tex]X_{V}[/tex][tex]M_{V}[/tex]) + ( [tex]X_{E}[/tex][tex]M_{E}[/tex])
so we substitute
M = ( 4.6% × 86.09) + ( 95.4% × 28.05 )
M = 3.96014 + 26.7597
M = 30.72 g/mol
Therefore, The mean repeat unit molar mass for PEVA is 30.72 g/mol
b)
Degree of polymerization
[tex]DP_{n}[/tex] = [tex]\frac{M_{n} }{M}[/tex]
where [tex]M_{n}[/tex] is the number average molecular weight ( 39,870 g/mol )
so we substitute
[tex]DP_{n}[/tex] = 39,870 g/mol / 30.72 g/mol
[tex]DP_{n}[/tex] = 1297.85 ≈ 1300 { 3 significance figure }
Therefore, degree of polymerization of the copolymer is 1300
What common instrument is used for hair comparison?
Comparison Microscope
Telescope
O Compound Microscope
Answer:
comparison microscope
Explanation:
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I know it’s a chemical change but can someone explain to me why it’s a physical change please?
Answer:
lol hope i help
Explanation:
why it is necessary to rinse the pipette after washing with water
Answer:Because When you're cleaning your glassware, you use water to rinse it off. If the burette is not completely dry by the time you use it, the remaining traces of water on the inside will make your titrant more dilute and thereby change its concentration.Before a burette is used, it needs to be cleaned. During the cleaning process, usually, water is introduced into the burette. Be the water clean or not, if the burette is then used without rinsing it with the solution that it is going to be filled with, the result of that analytical exercise will not be precise and accurate. The reason is that water residue in the burette would dillute the solution when it's filled in the burette which would make it impossible to determine the exact concentration of the solution moved by the burette. By rinsing and re-rinsing the burette several times with the solution it is going to be filled with, residue water from the cleaning process would be successfully removed from the burette as are other leftover substances from the cleaning process.
hope this helps have a nice night ❤️❤️❤️
Explanation:
PLEASE HELP! Will mark Brainly if correct!
Answer:
6.591
explanation
mass of weight is 1.092 , and mass of weight boat and sample = 7.683
mass of the solid sample= (mass of weight boat and sample) - (weight of the boat) = (1.092-7683) = 6.591 g
hence, the mass of the solid sample is 6.591 g
Which is a property of fluorine(F)? A.it is found as a liquid in nature B.It conducts electricity C.It does not react D.It readily reacts
Answer:
D. It readily reacts.
Explanation:
Fluorine is a member of the halogen group, and has seven valence electrons. This means it is very close to having a stable octet of 8 valence electrons. It has high electronegativity and will easily react with other elements, especially alkali metals, to form compounds.
What is the sum of the coefficients when the equation is balanced with the smallest whole numbers? __BaCl2 + __Fe2(SO4)3 → __FeCl3 + __BaSO4 *?
Explanation:
Hphphphphphphphohoohohhpph
what is renewable and non- renewable energy??
Answer:
Those thing which can be renewed or replaced shortly after it is exhausted at its place of origin is called renewable energy
Those think which cannot be replaced shortly after it is exhausted at its place of origin is called no renewable energy.
Answer:
renewable energy means those who doesn't finish over a long period of time and never finish. but non renewable energy means those who finished one day.