Answer: 0.5 M
Explanation:
molarity = (moles of solute)/(liters of solution)
To find liters of solution, we can convert the 500 grams of water to liters, which is 0.5 L.The formula mass of NaCl is about 58.44 g/mol, so 13.7 grams is about 13.7/58.44 = 0.234 mol.Hence, the molarity is (0.234)/(0.5) = 0.5 M (to 1 s.f.)
What is the total number of moles of solute in 2.0 liters of 3.0 m naoh
a) 1.0 mole
b) 2.0 moles
c) 3.0 moles
d) 6.0 moles
Answer:
d) 6.0 moles
Explanation:
M = moles of solute/liters of solution
3 0M = x/2.0
2.0L×3 0M = x/2.0L×2.0L
6.0 moles = x
Which chemical equation is unbalanced? c o2 right arrow. co2 sr o2 right arrow. 2sro 6h2 3o2 right arrow. 6h2o h2 h2 o2 right arrow. h2o h2o
The unbalanced equation is one in which the moles of atoms are not equal on both sides of the reaction.
What is a balanced chemical equation?A balanced chemical equation is one in wgich the moles of atoms in the reactants side is equal to the moles of atoms on the product side.
The given equations of reaction is not clearly stated.
Therefore, the unbalanced equation is one in which the moles of atoms are not equal on both sides of the reaction.
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As the temperature increases to the ice cube's equilibrium stage, the average kinetic energy of the molecules….?
increases
decreases
remains the same
increases and then decreases
Answer:
Increase
Explanation:
if the temperature is increasing it will be slowly melting the ice causing it to turn into a liquid which will make the kinetic energy in the molecules increase.
Acids increase the concentration of what in water?.
Answer:
Hydronium (H3O+) ions
Explanation:
Acids increase the concentration of hydronium ions in water and thus lower the pH (make it more acidic)
Answer:
The answer for this question is Hydrogen Ions
What is a chemical equation? What does it tell you?
Answer:
A chemical equation is the symbolic representation of a chemical reaction in the form of symbols and formulas.
what is the important of Noble gases
Answer:
most often helium and argon, the least expensive—are used to provide chemically unreactive environments for such operations as cutting, welding, and refining of metals such as aluminum (atmospheric oxygen and, in some cases, nitrogen or carbon dioxide would react with the hot metal).
hope this helps
Gregory is doing his experiment for the science
fair. The above table shows the data he collected.
Based on the table, what is the best description of
what Gregory wanted to know?
A) Which brand
and amount of fertilizer will work best?
B) Which
brand of fertilizer (A,B or C) works the best?
C)
Which amount of fertilizer will show the most
growth?
D) What level of fertilizer is the most that
can be given before growth decline?
Answer:
A) Which brand and amount of fertilizer will work best?
Explanation:
A) is the best answer because it takes into account all of the variables. The variables seem to be the amount of fertilizer, average plant growth, and brand of fertilizer. The independent variables are amount of fertilizer and fertilizer brand. The dependent variable is the plant growth.
B) is not the best answer because it does not include the amount of fertilizer. Because this variable is changing, it is important to consider.
C) is not the best answer because it does not take the type of fertilizer into account. If the researcher were only concerned with how the amount of fertilizer affects plant growth, it would not be necessary to include 3 different types of fertilizer.
D) is not the best answer because this doesn't explain why the researcher used different types of fertilizer.
35.0g of zinc oxide react with what volume of oxygen at stp given the following reaction: zn + o2 --> zno
The volume of oxygen that would react at STP will be 6.00 L
Stoichiometric calculationFrom the equation of the reaction:
[tex]2Zn + O_2 --- > 2ZnO[/tex]
The mole ratio of [tex]O_2[/tex] to the ZnO produced is 1:2
Mole of 35 g Zn = 35/65.3 = 0.536 moles
Equivalent mole of [tex]O_2[/tex] that will react = 0.536/2 = 0.268 moles
1 mole of gas at STP = 22.4 L
0.268 moles of gas = 0.268 x 22.4 = 6.00 L
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gases are a unique state of matter because the volume of a gas can be compressed or expanded based on the pressure applied. robert boyle studied the changes in the volume of a gas as the pressure changes with a barometer. he found that the pressure is inversely proportional to volume when the mass and temperature remain constant. which equation represents the pressure-volume relationship of boyle's law?
Boyle's law gave the relation between the pressure and the volume of the gas. The equation can be represented as PV = constant (T and n are constant).
What is Boyle's law?Boyle's law gave the inverse relationship between the pressure and the volume of the hypothetical ideal gas when the moles and the temperature are constant. It can be shown as PV = constant.
The volume of the gas can be compressed by increasing the pressure, and the volume of the gas can be expanded by decreasing the pressure of the gas.
Therefore, Boyle's law gave the PV = constant.
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3 Apply Use context clues to write your own definitions for the words definite and occupy.
Example sentence
Solid is the state of matter that has a definite shape and volume.
definite:
__________
Example sentence
A larger container will allow a gas to occupy more space.
occupy:
__________
Answer:
Explanation:
own definitions for the words definite and occupy.
Example sentence
Solid is the state of matter that has a definite shape and volume.
definite:
__________
Example sentence
A larger container will allow a gas to occupy more space.
occupy:
Just look at pic please it has the question and answers
[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]
Let's balance the given equation ~
[tex]\qquad \sf \dashrightarrow \:S_8 + O_2 \rightarrow SO_3[/tex]
[tex] \textsf{Step 1 - balance Sulphur (S) on both sides} [/tex]
[tex] \textsf{[ By multiplying} [/tex] [tex] \sf{SO_3} [/tex] [tex] \textsf{by 8 on product side ]} [/tex]
[tex]\qquad \sf \dashrightarrow \:S_8 + O_2 \rightarrow 8 \: SO_3[/tex]
[tex] \textsf{Step 2 - balance Oxygen (O) on both sides} [/tex]
[tex] \textsf{[ By multiplying} [/tex] [tex] \sf{O_2} [/tex] [tex] \textsf{by 12 on reactant side ]} [/tex]
[tex]\qquad \sf \dashrightarrow \:S_8 +12 \: O_2 \rightarrow 8 \: SO_3[/tex]
So, we can infer that the Correct choice is D
If 6.3 moles of O2 and 8.15 moles of N2 are placed in a 65.1 L tank at a
temperature of 348 C, what will the pressure of O2?
Answer:
Partial pressure of O2 = 4.93 atm
Explanation:
PV = n RT R = .082057 L-atm/mol-K
n = 6.3 + 8.15 = 14.45 moles
348 C = 621.15 K
P (65.1) = 14.45 ( .082057)(621.15) = 11.31 atm
Now the fraction of pressure from Oxygen is
6.3 / (6.3+8.15) * 11.31 = 4.93 atm
On Earth, carbon is essential to life. Where did Earth get its carbon?
Answer: Most of Earth's carbon was inherited directly from the interstellar medium, it is the material that exists in space between stars in a galaxy.
Explanation: All of the carbon and oxygen in all living things are made in the nuclear fusion reactors that we call stars. The early stars are massive and short-lived. They consume hydrogen, helium, and lithium and produce heavier elements.
Hope this helps!
define the term organic farming
Answer:
is agriculture that makes healthy food,healthy soil,healthy plants and healthy environments a priority,along with crop productivity
witchh organsim primary cosumers
Answer:
Primary consumers are herbivores, feeding on plants
Explanation:
:)
Primary consumers are at the second trophic level of the food pyramid. This means that they eat producers. An example of a primary consumer would be a grasshopper eating grass. Primary consumers get eaten by secondary consumers, such as a rabbit who eats grass, and the rabbit gets eaten by a fox.
what is an atom?Please help
Answer:
It's the basic unit of an element.
something that makes up everything that has mass
Explanation:
Analyze your results.
a. Calculate the solution concentration for each of the HCl samples. The first one has been done for you.
b. As the concentration of the HCl solution increased, did the speed of the reaction increase or decrease?
Upload your data and responses to the questions in the Analysis and Conclusions section.
WRITER
c. Therefore, as the concentration of a reactant increases, does the rate of the reaction increase or decrease?
d. Do your predictions previous to this investigation agree with your results?
e. Make a general rule about the effects of concentration of reactants on reaction rates.
#b
According to Le C ha.te llors principle of we increase concentration of reactants or products equilibrium shifts.
Yes increases#c
Rate of reaction also increases#e
Stated in b
Solve and balance H2+Cl2
H2 + Cl2 → 2 HCl - Equation Balanced
Explanation:
Two elements H2and Cl2 combine to from a single compound, HCl. Hence, it is a combination reaction As two elements combine to from a compound, it is an element - element combination.
I hope it'll help you...
Which are the products in the equation ch3sh 4o2 → co2 so2 2h2o? check all that apply. ch3sh o2 co2 so2 h2o
The products in the equation would be [tex]CO_2[/tex], [tex]SO_2[/tex], and [tex]H_2O[/tex].
Chemical equationsFrom the equation of the reaction:
[tex]CH_3SH + 4O_2 --- > CO_2 + SO_2 +2H_2O[/tex]
The products are [tex]CO_2[/tex], [tex]SO_2[/tex], and [tex]H_2O[/tex].
This is because, for every chemical equation, the reactants are always at the back of arrows while products are at the front of arrows. In other words, reactants are usually on the left-hand side while products are on the right-hand side.
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ANSWER ASAP PLEASE I NEED HELP!
Answer:
If I remember correctly it should be B because it went from Cu^2 to Cu^0
Explanation:
What is the half-life of an isotope if after 14 days you have 31.25 g remaining from a
250.0 g sample?
Answer:
4 2/3 days
Explanation:
31.25 = 250 ( 1/2)^n solve for n
31.25/250 = 1/2 ^n log both sides to find n = 3 half lives
14 days = 3 half lives
14/3 = 4 2/3 day half life
What are some reasonable safety precautions for conducting field investigations
in polar climates?
Answer:
warm clothing hiking sticks safter gear. food water. the basics
Describe the steps, in detail, of creating a water compass. Please remember to write in complete sentences.
Fill in the blanks to create the lesson question, which is the broad question about gases that Boyle’s law answers. You will explore this question in the lab experiment.
Lesson Question: What is the effect of on the volume of a gas?
A. pressure
B. the number of moles
C. temperature
D. molecular structure
E. The mass of the Gas
Hypothesis: If the pressure on a gas is increased, then its volume will ..
A. Decrease
B. increase
C. Stay the same
D. fluctuate randomly
because the gas molecules will ...
A. scatter at random
B. Break apart
C. change into solid form
D. be pushed closer together
E. be pushed farther apart
Answer:
The kinetic energy would decrease with increase1. How is a bicycle race like a chemical reaction? The Tour de France is one of the most famous bicycle races in the world. It is held from mid-July to early August every year. During the race, cyclists travel almost 4000 kilometers. At one stage of the race, riders must cross steep mountains with heights of 1900 meters or more. The riders need extra energy to ride through these steep mountains.
During the riding of the steep mountain, the body needs more energy because going up consume more energy and oxygen due to additional effect of gravity on your momentum.
What is the effect of cycling?Cycling is a good exercise as swimming, while cycling, happy hormones are released like dopamine and serotonin.
The primary forces that work while cycling are gravity, friction, rolling resistance, and air resistance.
Thus, During the riding of the steep mountain, the bod needs more energy because going up consume more energy and oxygen due to additional effect of gravity on your momentum.
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Water has a specific heat of 4.184 J/goC. Copper metal has a specific heat of 0.385 J/goC. What can be said about the amount of heat needed to raise both substances 1 degree Celsius. (In other words, which one will take more heat to raise 1 degree.)
It can be said that water will take more heat to raise its temperature by 1°C than copper. Details about specific heat can be found below.
What is specific heat capacity?Specific heat capacity of a substance can be defined as the amount of heat (J) absorbed per unit mass (kg) of the material when its temperature increases 1 K or 1 °C.
According to this question, water has a specific heat of 4.184 J/g°C while Copper metal has a specific heat of 0.385 J/g°C. This shows that water has a higher specific heat.
Therefore, it can be said that water will take more heat to raise its temperature by 1°C than copper metal.
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A nuclide of phosphorus 3015P decays into a nuclide of silicon 3014Si. In order to satisfy charge conservation and lepton number conservation the other products must be __________.
In order to satisfy charge conservation and lepton number conservation the other products must be neutron.
What is conservation of mass?
The principle of conservation of mass states that, the sum of the initial mass of reactants must be equal to final mass of the products.
[tex]_{15}^{30}P\ --- > \ _{14}^{30} Si \ + \ ^{0}_{1} n[/tex]
The balanced reaction of radioactive decay of phosphorous shows conservation of mass.
Thus, in order to satisfy charge conservation and lepton number conservation the other products must be neutron.
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What kind of intermolecular forces act between a chloromethane molecule and a chloroacetylene molecule
Dipole to Dipole force
Explanation:
A dipole to dipole forces exists between these molecules
If a substance cannot be separated by physical means or chemical means, it is ___________.
Question 4 options:
an element
a solution
a molecule
a compound
An element is a pure substance that cannot be separated into simpler substances by chemical or physical means
Answer:
It is an element.
Explanation:
chemical element, also called element, any substance that cannot be decomposed into simpler substances by ordinary chemical processes. Elements are the fundamental materials of which all matter is composed.
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How do models help scientists predict the polarity of molecules? Explain your answer using what you know about molecular structure and provide an example of a molecule that contains polar bonds, but is nonpolar.
Answer:
Explanation:
Models help scientists predict the polarity of molecules because the bond polarity should be determined that lies between the molecule atoms.
Models help scientists predict the polarity of molecules because the bond polarity should be determined that lies between the molecule atoms.
You can use the difference in electronegativity of two atoms to predict whether they make polar, nonpolar or ionic bonds. Water is a well-known example of a polar molecule.
The information with respect to the atom is as follows:
The bond that lies between the same atoms i.e. same elements should always be neutral.The bond that lies between the atoms of the different elements should always be inequivalent electrically as one atom should be positively charged and the other one should be negatively charged.How do you determine the polarity of a solution?Simply mix the liquid with an equal part of water and allow the mixture to sit undisturbed. Examine the mixture after the liquids have sat together for a time. If they have not separated, but have formed a solution, the unknown liquid is polar. If there is a clear boundary between the two liquids, it is non-polar.
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