Answer:
(0.93 (mol / L)) * 1.85 L = 1.7205 moles
(0.93 (mol / L)) * 0.225 L = 0.20925 moles
(612.2 grams) / (0.36 mL) = 1700 555.56 kg / m^3
Explanation:
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n2+3H2=2NH3 finds equilibrium concentrates of N2-0.1M, H2=0.05M and NH3=0.001M what’s the Equilibrium constant Kc?
please i need it Lab: Calorimetry and Specific Heat
Answer:
step3:
aluminum- 11.98
copper-12.14
iron- 12.31
lead- 12.46
step5: 12.46, 52.31, 39.85
step7: 100, 22.4, 27.1, 4.7, 72.9
step5: 12.26, 52.49, 40.13
step7: 100, 22.7, 24.6, 1.9, 75.4
step5: 12.42, 52.66, 40.24
step7: 100, 22.5, 24.9, 2.4,75.1
step5: 12.34, 51.99, 39.65
step7: 100, 22.6, 23.3, 0.7, 76.7
step8: 0.90,0.35,0.44,0.12
Below are pictures of a coastline and a river. Which of the following changes to the Earth's surface can be caused by wind and water
Answer: tsunami no cap
Explanation:
What results from the sharing of electron pairs between two atoms?
Answer:
the electrical attraction between large numbers of cations and anions. Results from the sharing of electron pairs between two atoms. ... A covalent bond in which the bonded atoms have an unequal attraction for the shared electrons.
Explanation:
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The balanced equation :
2HCl + Zn ⇒ ZnCl₂ + H₂
Further explanationGiven
Reaction(unbalanced)
HCl + Zn ⇒ ZnCl₂ + H₂
Required
Balanced equation
Solution
Give a cofficient(the most complex compound=1)
aHCl + bZn ⇒ ZnCl₂ + cH₂
Make an equation
Zn, left = b, right = 1⇒b=1
Cl, left = a, right = 2⇒a=2
H, left = a, right = 2c⇒2c=a⇒2c=2⇒c=1
The equation becomes :
2HCl + Zn ⇒ ZnCl₂ + H₂
Balance the following equation: AlCl3+Mg-> MgCl2+Al
Answer:
Aluminum Chloride+Magnesium=Magnesium Chloride+Aluminum
helpo pls rnn only have 5 min
The percent
composition of an
unknown substance is
75.42 % Carbon, 6.63
% Hydrogen, 8.38 %
Nitrogen, and 9.57 %
Oxygen. If its molar
mass is 668.0 g/mole
what is its molecular
formula?
Answer:
mass of the empirical formula is 259.64 g/mol. = 519 g/mol
Explanation:
The molecular formula is Hg2C4H6O4. One of the most deadly poisons, strychnine, has a formula weight of 334 g/mol and the composition 75.42% C, 6.63% H, 8.38% N; the rest is oxygen.
Four molecules of solid sodium react with one molecule of oxygen gas to yield 2 molecules of solid Sodium oxide.
Answer:
reaction?
Explanation:
4na + o2 → 2na2o
According to the following reaction, how many grams of sulfur trioxide will be formed upon the complete reaction of 31.6 grams of oxygen gas with excess sulfur dioxide? 2SO2 (g) + O2 (g) 2SO3 (g)
Which of the following conclusions can be drawn from the curves in the
energy diagram?
A. The reaction represented by curve B has a larger equilibrium
constant than curve A.
B. The molecules represented in curve A have higher kinetic energy
than curve B.
C. The reaction represented by curve B will go faster than the curve A
reaction.
D. The reaction represented by curve A requires less added energy
than curve B
Answer:
The answer is C
Explanation:
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The conclusion that can be drawn from the curves in the energy diagram is the reaction represented by curve B will go faster than curve A reaction. The correct option is C.
What is an energy diagram?An energy diagram is one that shows the transfer of energy or the use of energy. The change in the energy in a chemical reaction is shown by the energy diagram. It is also called a reaction progress curve.
The curve of an energy diagram is shown here, a person is bicycling here, and curve A is higher than curve B. So more amount of energy will be needed for bicycling in curve A, and less amount of energy is needed for curve B.
Thus, the correct option is C, the reaction represented by curve B will go faster than the curve A reaction.
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Determine what ions are present when the following dissociates or ionizes in water. Include states of
matter.
KNO3
Cation:
Anion:
Cation is [tex]K[/tex] and anion is [tex]NO3[/tex] in the dissociates or ionizes in water.
What is molecule?A molecule is a group of two or more atoms held together by attractive forces known as chemical bonds; depending on context, the term may or may not include ions which satisfy this criterion.In quantum physics, organic chemistry, and biochemistry, the distinction from ions is dropped and molecule is often used when referring to polyatomic ions.
The simplest forces between atoms are those which arise as a result of electron transfer. A simple example is that of say sodium fluoride. The sodium atom has a nuclear charge of +11, with 2 electrons in the K shell, 8 in the L shell and 1 in the M shell. The fluorine atom has a nuclear charge of 9 with 2 electrons in the K shell and 7 in the L shell.
The pair of electrons are know as bonding pairs and the stable balance of attractive and repulsive forces between atoms.The covalent compounds do not contain electricity.The covalent compounds are having lower enthalpies of vaporization and fusion.The covalent compounds are easily catches fire and are more flammable than ionic compounds.
Therefore,Cation is [tex]K[/tex] and anion is [tex]NO3[/tex] in the dissociates or ionizes in water.
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pt: What type of reaction has occurred in the following equation?
2 Na,PO, + 3 CaCl, 6 NaCl + Caz(PO.)2
Answer:
Double replacement or double decomposition
Explanation:
In the reaction below, a double replacement or double decomposition has occurred.
2Na₃PO₄ + 3CaCl₂ → 6NaCl + Ca₃(PO₄)₂
This reaction occurs mainly between two ionic substances.
The reaction involves an actual exchange of partners to form new compounds. For example;
AB + CD → AD + CB
One of the following conditions below serves as the driving force for double replacement reactions:
Formation of an insoluble compound or precipitate. Formation of water or any other non-ionizing compound Liberation of a gaseous product.
All the following process lead to a decrease in salinity of seawater except for A. melting of sea Ice B. Precipitation C. runoff D. evaporation
What are the monomers of nucleus acids
Answer:
The term nucleic acid is the overall name for DNA and RNA.
Explanation:
They are composed of nucleotides, which are the monomers made of three components: a 5-carbon sugar, a phosphate group and a nitrogenous base.
Answer:
Nucleotide
Explanation:
HELP!
True or false: When there are zero lone pairs on the central atom, the shape is
symmetrical (assuming all of the bonds are the same).
A cup of water contains 13.9 moles of water. How many molecules of water are in the cup.
Answer:
The density of water is 1 gram per cc, so 1 mole of water takes 18cc of volume. 1 cup is approximately 250ml (i.e. 250cc) - so 1 cup will contain approximately 13.89 moles of water, which will contain approximately 8.36 x 1024 molecules of water.
Explanation:
1 mole of water requires 18cc of volume due to the density of water, which is 1 gram per cc. Since a cup contains roughly 250ml of liquid, it will likely contain 13.89 moles of water, or 8.36 × 10²⁴ molecules.
What is density ?
The mass of a substance per unit of volume is its density. Density is most frequently represented by the symbol, however the Latin letter D may also be used. The formula for density is mass divided by volume:
Because it enables us to predict which compounds will float and which will sink in a liquid, density is a crucial notion. As long as an object's density is lower than the liquid's density, it will often float.
One of an object's most significant and practicable physical characteristics is density. Densities are frequently used to distinguish between pure materials, as well as to describe and infer the composition of various types of mixes.
Thus, 1 mole of water requires 18cc of volume due to the density of water, 8.36 × 10²⁴ molecules of water are in the cup.
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queous hydrochloric acid HCl will react with solid sodium hydroxide NaOH to produce aqueous sodium chloride NaCl and liquid water H2O. Suppose 6.93 g of hydrochloric acid is mixed with 2.4 g of sodium hydroxide. Calculate the maximum mass of water that could be produced by the chemical reaction. Round your answer to 2 significant digits. g
Answer:
Explanation:
NaOH + HCl = NaCl + H₂O
1 mole 1 mole 1 mole
6.93 g of HCl = 6.93 / 36.5 mole = .19 mole
2.4 g of NaOH = 2.4 /40 mole of NaOH = .06 mole
.06 mole of NaOH is less than .19 mole of HCl so
limiting reagent is NaOH
.06 mole of NaOH will react with .06 mole of HCl to give .06 mole of water .
water formed by given mass of reactants
= .06 moles of water
= .06 x 18 gram of water
= 1.08 g of water .
= 1.1 g of water .
Explain why the surface of the tire melts.
Answer:
Why Heat Causes Tires to Expand and Blow Out
Explanation:
The air pressure in tires increases as the temperature goes up. ... Such a big difference it can cause a tire to pop. Even if it doesn't give out, over-inflation can cause a tire to prematurely wear and interfere with braking.
H2PO2- is polar.
True
False
Answer:
False
H2N2 is used in organic synthesis. This compound can exist as two distinct species, one that is polar and one that is nonpolar; but the H-H bond is said to be nonpolar.
I WILL GIVE BRAINLTIST THING OR WHATEVER IT'S CALLED
Which of the following objects would have the greatest gravitational attraction between them if they were set 3.0 km apart?
A .20kg object and a 200kg object
A 10kg object and a 100kg object
A 30kg object and a 200,000kg object
A 400,000 kg object and a 100,000,000kg object
Answer:
A 400,000 kg object and a 100,000,000kg object
Explanation:
The objects with the most mass between them will have the greatest gravitational attraction.
This is why the last option is the right choice.
The reason for this is based on the Newton's law of universal gravitation which states that:
"the gravitational force of attraction between two bodies is directly proportional to the product of their masses and inversely proportional to the square of the distance between them".
So, the more the mass, the greater the gravitational attraction between two bodies.
Calculate the volume of a box, in cubic centimeters, which is 423 cm long, 12 cm wide, and 25 cm high. Report your answer with correct significant figures in cubic centimeters.
Answer:
130,000 cubic centimeters
Explanation:
The volume of a box is its length multiplied by its width multiplied by its height (lwh). 423 times 12 times 25 is 126,900. When multiplying, the number of significant figures is the same as the number with the least number of significant figures. The correct number of significant figures in this example is 2, so 126,900 would need to round up to 130,000 in order to have 2 significant figures.
The volume of an object is given by length * width * height
In order to obtain the volume of a box, in cubic centimeters, we need to note the following parameters;
length = 423 cm
width = 12 cm
height = 25 cm
Volume = length * width * height
Volume = 423 cm * 12 cm * 25 cm
Volume = 127000 cubic centimeters.
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HELP ILL MARK U AS BRAINLIEST PLSSSSS
Planet Average Orbital Speed
Mercury 47.87 km/s
Venus 35.02 km/s
Earth ? km/s
Mars 24.077 km/s
Jupiter 13.07 km/s
Saturn 9.69 km/s
Uranus 6.81 km/s
Neptune 5.43 km/s
The table above shows the average orbital speed of each planet. The planets are listed in order of increasing distance from the Sun, with Mercury being the nearest and Neptune the farthest.
How does the Earth compare in orbital speed to the other planets?
A.
The Earth moves faster than the planets that are farther from the Sun.
B.
The Earth moves at the same speed as all the other planets
C.
The Earth moves at a slower speed than all the other planets.
D.
The Earth moves faster than the planets that are closer to the Sun.
The earth moves faster than the planets that have farther from the sun
Answer:
The Earth moves faster than the planets that are farther from the Sun.
Explanation:
Based on the data in the table, orbital speed decreases as distance from the Sun increases. Each planet, including Earth, moves slower than the planets that are closer to the Sun but faster than the planets that are farther from the Sun. Earth's average orbital speed (29.78 km/s) fits this pattern.
100 Points! PLZ HELP
Which statement best describes the model below?
Answer:
Option D
Explanation:
Because we know the relationship between no of moles and volume
Volume is directly proportional to no of molesSo if moles is increased volume would be increased too .Option D
What is the actual yield of a reaction?
A. The calculated amount of product
B. The fractional amount of product
C. The predicted amount of product
D. The measured amount of product
Solid iron(III) oxide (Fe,O3) reacts with hydrogen gas (H) to form iron and
water.
Salanced Equation: 1 Fe,0+ 3 H2 → 2 Fe + 3 H,0
. How many grams of iron are produced when 450 grams of iron(ill) oxide are
reacted?
8. How many grams of water will be produced when 0.0155 moles of hydrogen
gas react completely with iron(III) oxide?
Which belongs in each place
Answer:
1. Oxygen Nitrogen
2. silicon Nitrogen
3. Carbon dioxide
Not sure about the 2nd one
Explanation:
prove me wrong
Help me pls ASAP thank you
answer is a very easy your welcome
A recipe for spaghetti souce requires 2.5 cups of tomato sauce. If only metric measures are available, how many milliliters of tomato sauce are needed?(1qt = 4 cups, 1q = 946 mL)
Answer:
591.25ml
Explanation:
4 cups=946ml
0.5cups=946÷8=118.25ml
2.5cups=118.25ml*5=591.25ml
Isobutyl propionate is the substance that provides the flavour for rum extract. Combustion of a 1.152 g sample of C-H-O compound yields 2.726 g CO2 and 1.116 g H2O. What is the E.F of the compound?
Answer:
C₇H₁₄O₂
Explanation:
From the question given above, the following data were obtained:
Mass of compound = 1.152 g
Mass of CO₂ = 2.726 g
Mass of H₂O = 1.116 g
Empirical formula =?
Next, we shall determine the mass of carbon, hydrogen and oxygen present in the compound. This can be obtained as follow:
For carbon (C):
Mass of CO₂ = 2.726 g
Molar mass of CO₂ = 12 + (2×16)
= 12 + 32
= 44 g/mol
Mass of C = 12/44 × 2.726
Mass of C = 0.743 g
For hydrogen (H):
Mass of H₂O = 1.116 g
Molar mass of H₂O = (2×1) + 16
= 2 + 16
= 18 g/mol
Mass of H = 2/18 × 1.116
Mass of H = 0.124 g
For oxygen (O):
Mass of compound = 1.152 g
Mass of C = 0.743 g
Mass of H = 0.124 g
Mass of O =?
Mass of O = (Mass of compound) – (Mass of C) + (Mass of H)
Mass of O = 1.152 – (0.743 + 0.124)
Mass of O = 1.152 – 0.867
Mass of O = 0.285 g
Finally, we shall determine the empirical formula for the compound as follow:
C = 0.743 g
H = 0.124 g
O = 0.285 g
Divide by their molar mass
C = 0.743 / 12 = 0.062
H = 0.124 / 1 = 0.124
O = 0.285 / 16 = 0.018
Divide by the smallest
C = 0.062 / 0.018 = 3.44
H = 0.124 / 0.018 = 7
O = 0.018 / 0.018 = 1
Multiply by 2 to express in whole number.
C = 3.44 × 2 = 7
H = 7 × 2 = 14
O = 1 × 2 = 2
Empirical formula => C₇H₁₄O₂
When matter is heated, particles within the matter will.
A. speed up.
B. produce sounds.
C. change into different types of particles. D change colors.
