What is true about asteroids
Answer:
They are big rocks that fly through space and are made of most commonly chondrite. When they collide, they collide with such force that they create craters on places like the moon.
How many electrons do two ethylene monomers () share to form a covalent bond?
Two electrons are shared between each hydrogen atom and the carbon atom bonded to it, and four electrons are shared between the carbon atoms.
Its 2
Answer:
2 would be the amount to form a covalent bond
how many protons does the bohr model have for helium?
Answer:
2 protons per atom of Helium
Explanation:
The number of proton in a given element is given by its place on the periodic table which is for He 2 protons b/c the atomic number for He is 2.
Other Examples:
Hydrogen (H-1) or Protium has 1 proton b/c its atomic number is 1.
Magnesium (Mg-24) has 24 protons b/c its atomic number is 24.
Lead (Pb-207) has 82 protons b/c its atomic number is 82.
Uranium (U-238) has 92 protons b/c its atomic number is 92.
The periodic table order of arrangement of elements is based upon 'The Periodic Law'. => The chemical and physical properties of the elements is a periodic function of atomic numbers, or number of protons in the nucleus.
What is the name of the cycle in which plants turn carbon dioxide into oxygen that animals can breathe
A. Water Cycle
B. Nitrogen cycle
C. Carbon dioxide-oxygen cycle
D. Rock cycle
Answer:
c
Explanation:
carbon dioxide oxygen cycle is basically photosinthesis
photosinthecis is where carbon dioxiode is turned to oxygen
what is the electron configuration for S-
Answer:
The Electron Configuration for Sulfur(S)= 1s^2 2s^2 2p^6 3s^2 3p^4
Explanation:
Use the sheet attached to help with a future question. (Hint: Follow the red lines). The atomic number will be equal to the number of powers raised.
Answer the following questions about the mechanism for the acid-catalyzed hydration of an alkene:
a. How many transition states are there?
b. How many intermediates are there?
c. Which step in the forward direction has the smallest rate constant?
Answer:
a) there are three transition states
b) there are two intermediates; carbocation and protonated alcohol
c) The first step in the forward direction
Explanation:
The acid-catalysed hydration of alkenes proceeds via a carbocation mechanism.
Three transition states can be identified in this mechanism for the acid-catalyzed hydration of alkenes.
The three transition states are derived from the three steps in the reaction sequence:
1) Protonation of the alkene by hydronium ion
2) Addition of water to the carbocation
3) loss of a proton to yield the alcohol
The first step involves the breaking of a pi bond, hence it is a slow step hence it has the smallest rate constant. The other two steps are fast steps.
Hydrogen gas and solid gold(III) sulfide are reacted. Pure solid gold metal is formed and gaseous hydrogen sulfide is released. Correctly identify the reactants and products:reactants:
a. solid gold, gaseous hydrogen sulfideproducts: hydrogen gas, solid gold(III)
b. sulfidereactants: solid gold, solid gold(III) sulfideproducts: hydrogen gas, gaseous
c. hydrogen sulfidereactants: hydrogen gas, solid gold, gaseousproducts: hydrogen sulfide
d. solid gold(III) sulfidereactants: hydrogen gas, solid gold(III)
e. sulfide products: solid gold, gaseous hydrogen sulfide
The reactants of the reaction will be solid gold (III) sulfide and hydrogen gas, while the products will be pure solid gold and hydrogen sulfide gas.
Chemical reactionsReactants react together during reactions to arrive at products.
In this case, solid gold (III) sulfide and hydrogen gas react according to the following equation:
[tex]Au_2S_3(s) + 3 H_2 (g)-- > 2 Au(s) + 3H_2S(g)[/tex]
Reactants = solid gold (III) sulfide, hydrogen gas
Products: pure solid gold, hydrogen sulfide gas
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HEY I NEED A ANSWER RIGHT NOW IT'S MISSING AND MY TEACHER ARE GRADING THEM NOW YOU WILL BE MARKED BRAINIEST
Answer:
56.6 g Fe2O3
Explanation:
Balanced equation is given by
[tex]\\ \rm\Rrightarrow 4Fe+3O_2\longrightarrow 2Fe_2O_3[/tex]
On both sides
Fe=4O=6Hence balanced
Now
3mols of O_2 produces 2 mol Fe_2O_31 mol O_2 produces 2/3=0.6mol Fe_2O_3Moles of O_2:-
17/32= 0.5molMoles of Fe_2O_3;
0.5(0.6)=0.3molMass of Fe_2O_3:-
Moles (Molar mass)159.7(0.3)=47.91gA solution of a weak acid was tested with the following indicators and the colors noted: Methyl Violet - violet Thymol Blue - yellow Methyl Yellow - yellow Congo Red - orange Bromcresol green - green What is the approximate pH of the solution
pH ranges depending on the solution, for a solution with weak acid pH will be between 4.0-7.0.
What is pH?pH is helps to determine if a solution is acidic or basic in nature.
A pH meter is the instrument that can be used for the measurements.
Methyl orange is used when titrating a strong acid against a weak base.
Therefore, the pH of the solution which is a weak acid will be between 4.0-7.0.
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How many gallons of concentrated sulfuric acid (density of 1.84 g/cm3) are required to have a mass of 184.33 pounds?
Note: 1 kg = 2.204 lb, 1 gallon = 3.79 L.
After series of conversion from one unit to another, the number of gallons was found to be 12 litres
Density, Mass and Volume
Given Data
Density of Sulfuric acid = 1.84 g/cm3Mass of Sulfuric acid = 184.33 PoundsConversion from pounds to Gram
1 kg ---------2.204 lb
x kg ---------184.33 lb
x = 184.33/2.204
x = 83.634 kg
hence the mass in gram = 83.634*1000
mass in gram = 83634 g
Now let us find the volume
We know that density = mass/volume
volume = mass/density
volume = 83634/1.84
volume = 45453.26 cm^3
Convert cm^3 to litres
Volume in litres = 45453.26 /1000
Volume in litres = 45.45 Litres
Convert from Litres to Gallons
1 gallon = 3.79 L
x gallons = 45.45 L
x = 45.45/3.79
x gallons = 11.99 L
Approx = 12 Litres
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Which has the greater density?
A) Air at 20 km altitude
B) Air at sea level
Answer:
Air at sea level
Explanation:
sry If Im wrong
Please calculate your BMI by taking your mass in kilograms divided by your
height in meters squared. Please help me out
Answer:
you find your bmi by dividing your weight in kg by your height in Meters then square it
this is the formula kg/m2
Explanation:
What is the equivalent mass of 2 moles of oxygen
Answer:
32 g
Explanation:
the molar mass of oxygen is 16 g
if it's asking o2 then 64
3. Calculate the average atomic mass for the sample of atoms shown below.
Cu-63
Cu-65
A. 63.50 u
B. 63.75 u
C. 64.25 u
D. 64.50 u
Answer:B:63.75
Explanation:(5/8 x 63)+(3/8 x 65)=(0.625 x 63)+(0.375 x 65)=63.75
Solve the following, Report your answer with correct number of significant figures
23.27-72.058
0.0853+0.05477+0.0002
35/0.0622
3400*0.00800
(43.1+27.250)*(22.514-18.0)
The solution for the arithmetic problems are is mathematically given as
23.27-72.058=-48.79
0.0853+0.05477+0.0002=0.14
35/0.0622=562.7
3400*0.00800=27.2
(43.1+27.250)*(22.514-18.0)=317.56
What is the solution for the arithmetic problems?Question Parameter(s):
23.27-72.058
0.0853+0.05477+0.0002
35/0.0622
3400*0.00800
(43.1+27.250)*(22.514-18.0)
Generally,
23.27-72.058=-48.79
0.0853+0.05477+0.0002=0.14
35/0.0622=562.7
3400*0.00800=27.2
(43.1+27.250)*(22.514-18.0)=317.56
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HELP ASAP!!!!!
Based on what you learned from the Reproduction and Energy article, why do you think this happens? You can review the article again (located in your Digital Resources) to be more sure about your response.
Reproduction is an energy requiring process as new organisms are produced from parents.
What is reproduction?Reproduction is the process by which living organisms produce young ones of their own kind.
Reproduction can either be by;
se-xual reproduction orase_xual reproductionReproduction is an energy consuming process.
Energy is required for cell division and for building up new news in the new organism.
Therefore, during reproduction, energy is required.
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A UNKNOWN metal displaces alumiun from a solution but does not displace sodium. using actvity series, determine unknown metal
Explanation:
k
na→cannot displaceca
mg
al→can displacezn
fe
sn
pb
h
cu
hg
ag
pt
au
the answer is calcium or magnesium
because that metal's activity will be higher than al and
lower than Na. so that the metal will be ca or mg.
HELP I don't understand anything !!!!!
Answer:
-I dont have a calculator on me but I can explain to you how to do it and you can put it in your calculator
Explanation:
-First you have to balance the equation because its not balanced
4Na+2H2O —-> 4NaOH
-After you balance it you have to add up the grams of H2 gas,
-The mass of each element is measured in grams
- You find how many grams each element it by looking at the periodic table and looking at the number at the bottom, thats called the mass
- Afterward if the element mass you are looking for has a small number as its subscript, that means there is more than one, so you must add them together to get the correct amount of grams it has
1+1=2grams
-After that, you take that and convert it to moles
2grams x 1mole/(6.02^23)grams = (unknown) moles
-And finally you convert that answer from moles to liters
(Unknown) moles x 22.4 Liters / 1 mole = FINAL ANSWER
I hope this was helpful, I tried to break it down the best I could for you <3
The mass of a block is 12 g and the volume is 6 ml. Calculate the density of the block.
Question 2 options:
18 g/ml
72 g/ml
0.5 g/ml
2 g/ml
Answer:
According to mass and volume, block density is 2 g/ml
Explanation:
Density is a measure, usually used in physics and chemistry, that relates the mass and volume of a solid or compound.
In general terms, the density is directly proportional to the mass, and inversely proportional to the volume, so increasing the mass will also increase the density.
The formula used to calculate the density is
ρ = [tex]\frac{m}{V}[/tex]
Therefore, according to the mass and density of the block
ρ = [tex]\frac{12}{6}[/tex] = 2g/ml
Being the density of the block equal to 2 g/ml.
The other options are not possible, because the values given do not correspond to the result of the equation.
What trend does electronegativity follow, going down the periodic table?
Answer: Decreases
Explanation: Electronegativity decreases because the valence electrons are farther from the nucleus.
Describe the composition of humus and why it is an effective organic fertilizer.
Answer:
In classical soil science, humus is the fraction of soil organic matter that is amorphous and without the "cellular cake structure characteristic of plants
Explanation:
anyways were r we going 2 talk?
and wut did i miss?
BALANCING EQUATION
O XCiz(aq) +
O AgNO3(aq)
X(NO3)2(aq) + O Agci(s)
DONE
7:05 PROGRESS: 14%
XE
equation on the wall display.
WE button when you think you
Answer:
i think it would be
Explanation:
What is the unit rate of the better deal? (Number answers only.)
LaTeX: \frac{160\:miles}{5\:gallons}\:or\:\frac{315\:miles}{9\:gallons}160 m i l e s 5 g a l l o n s o r 315 m i l e s 9 g a l l o n s
The better deal has a unit rate of [m] miles per gallon.
You are going to standardize your sodium hydroxide by titrating with potassium hydrogen phthalate. As an example, you dissolve 0.3365 g of potassium hydrogen phthalate, otherwise known as KHP (KHC8H4O4) in water in a 250.0 mL Erlenmeyer flask and then add phenolphthalein indicator. You then titrate with your sodium hydroxide solution, which is in a buret, and you determine that the equivalence point is at 12.44 mL of your sodium hydroxide solution. Determine the molarity of your sodium hydroxide solution. What color will the solution of potassium hydrogen phthalate turn to determine when the equivalence point has been reached
Answer:
0.13 M
Explanation:
The reaction equation is;
NaOH(aq) + KHC8H4O4(aq) ------> KNaC8H4O4(aq) + H2O(l)
Molar mass of KHP = 204.22 g/mol
Amount of KHP= mass/ molar mass = 0.3365 g/204.22 g/mol = 1.65 × 10^-3 moles
n= CV
Where;
C= concentration
V= volume in dm^3
n= number of moles
C= n/V = 1.65 × 10^-3 moles × 1000/250 = 6.6 × 10^-3 M
If 1 mole of KHP reacts with 1 mole of NaOH
1.65 × 10^-3 moles of KHP will react with 1.65 × 10^-3 moles of NaOH
From
n= CV
We have that only 12.44 ml of NaOH reacted
C= n/V = 1.65 × 10^-3 moles × 1000/12.44
C= 0.13 M
At the equivalence point, the KHP solution turned light pink.
How many grams are in 0.55 moles of C6H10S?
Answer:
62.7 gram
Explanation:
Molar mass = (6)(12)+(10)(1)+(1)(32)=114 g/mol
Mass = no of moles × molar mass
= 0.55 × 114 = 62.7 gram
The mass of 0.55 moles of compound C₆H₁₀S is equal to 62.7 g.
What is a mole?A mole is defined as a standard unit that is used to find a huge number of quantities such as atoms, molecules, ions, or other particles. The mass of the 1 mole of any chemical element is equal to the atomic mass of the element and that of any chemical compound is known as molar mass.
The number of entities in 1 mole was found to be equal to 6.023 × 10²³ which is known as Avogadro’s number or Avogadro's constant
Given, the number of moles of the given compound = 0.55 moles
The mass of 1 mole of given compound C₆H₁₀S = 114 g/mol
The mass of 0.350 moles of the given compound = 0.55 × 114 = 62.7 g
Therefore, 62.7 grams is the mass of 0.55 moles of C₆H₁₀S.
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Producer gas has the following composition by volume: O2 . The oxygen fed from the air and the producer gas is 20% in excess of 68.0 1.2507 2CO + O2 2CO2 The oxygen is from the air whose volumetric composition is assumed to be 80% N2 % Density, kg/m3 The gas is burned with oxygen according to the following equation: CO2 3.5 1.9768 the amount required for complete combustion. The combustion is 98% complete. N2 CO 28.0 1.2501 0.5 1.4289 and 20% O2 Carry out total material balance for this process based on 100kg of gas burned.
Answer:
ANSWER: (a) 6.93 m3 (b) 54.286 m3 (c) 20.45% CO2, 1.3496 02, 78.21% N2
Explanation:
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A 35.3g of element m is reacted with nitrogen to produce 43.5g of Compound M3N2, What is the molar mass of the element and the name of the element
Answer:
The molar mass of an element is the mass in grams of one mole (6.02 x 1023 particles) of the element.
Hope it help
Explanation:
good luck
Question 3 of 5
Which two characteristics describe the pair of objects experiencing greater
gravitational force?
2 kg
2 kg
S kg
5 kg
d = 1 m
d = 5 m
D A. More mass
B. Greater distance between them
C. Shorter distance between them
I D. Less mass
SUS
Answer:
A. More mass
C. Shorter distance between them
Explanation:
The two characteristics of a body experiencing greater gravitational force are that they have mass and a shorter distance between them.
This is conformity with Newton's law of universal gravitation.
The law states that "every object attracts one another with a force that is directly proportional to their masses and inversely proportional to the square of the distance between them".
This law implies that the more the mass of two bodies, the more the gravitational force of attraction. And that the shorter the square of the distance between them, the more the attraction.
Answer:
A. More Mass And
C. Shorter Distance Between Them
Explanation:
I Know This Is Already Answered But I'm Ok With It.
The following questions pertain to a 0.50 M solution of HOCl at 25℃. pKa = 7.46 at 25℃. a. Find the concentration of all species present in the solution at equilibrium. b. Find the pH of the solution. c. Identify the strongest base in this system.
Predict the precipitate produced by mixing an Al(NO3)3 solution with a KOH solution. Write the net ionic equation for the reaction.
Molecular equation:
Complete Ionic Equation:
Net Ionic Equation:
Identify spectator ions:
Based on the reactants and products,
The molecular equation of the reaction is: Al(NO3)3 + 3 KOH ---> Al(OH)3 + NaNO3 The complete ionic equation of the reaction is: Al3+ 3NO3- + 3 K+ 3OH- ---> Al(OH)3(s) + 3 Na+ 3 NO3+The net ionic equation of the reaction is:Al3+ 3OH- ---> Al(OH)3(s) The spectator ions are: Na+ and NO3+What is a precipitate?A precipitate is a solid product formed in when two solutions of salts react by double replacement.
The molecular equation of the reaction of Al(NO3)3 solution with a KOH solution is:
Al(NO3)3 + 3 KOH ---> Al(OH)3 + NaNO3
The complete ionic equation of the reaction of Al(NO3)3 solution with a KOH solution is:
Al3+ 3NO3- + 3 K+ 3OH- ---> Al(OH)3(s) + 3 Na+ 3 NO3+
The net ionic equation of the reaction of Al(NO3)3 solution with a KOH solution is:
Al3+ 3OH- ---> Al(OH)3(s) The spectator ions are: Na+ and NO3+Learn more about ionic equation at: https://brainly.com/question/25604204
Dinitrogen oxide has _____.
Answer:
Nitrogen is the answer my good sir.
Explanation: