1. What is the new volume of a sample of neon if 5.23 L of the gas, which was originally at 214 mmHg, is compressed until the pressure increases to 796 mmHg?
2. When a balloon containing 635 mL of air is taken from sea level (at standard pressure) to a higher altitude, the balloon expands to 829 mL. What is the air pressure at this new altitude (in atm)?
3. A 465 mL sample of gas at 55°C is cooled to standard temperature (0°C). What is its new volume?
4. To what Celsius temperature does 750. mL of gas originally at −12°C need to be heated to bring the volume to 2.10 L?
5. The pressure in a car tire is 217 kPa at 24°C. After being driven on a hot summer day, the pressure in the tire increases to 258 kPa. What is the Celsius temperature of the air in the tire?
6. A gas sample originally at −39°C is heated to standard temperature (0°C), at which point its pressure is measured to be 808 mmHg. What was the original pressure of the gas?
7. A 400. mL sample of gas at 15°C and 113 kPa is heated to 227°C while expanding into a 900. mL container. What is the new pressure of the gas in kPa?
8. 2.50 g of CO2 gas is confined in a rigid cylinder at a pressure of 4.65 atm. If 0.42 g of gas is released from the cylinder, what is the new pressure?
Please help I'm so bad at chemistry
Answers
Here are attached photos, I don’t think they ar links, lmk if they don’t work
in the answering section it didn’t show me the full question so I only saw a little of question 5. Hopefully you get the idea of how to identify which equations to use tho! Good luck!
Related Questions
When two atoms form a molecule, the molecule has lower energy than the two separate atoms. However, when only two atoms are present, they bounce off each other and do not form a molecule. Explain what happens to the energy of the atoms when there are only two atoms and they collide.
DONT GIVE ME A LINK!!
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Answer:
they end up bouncing against each other instead of merging together
Explanation:
What can we do to protect our oceans ?
Answers
1. Conserve Water
Use less water so excess runoff and wastewater will not flow into the ocean.
2. Reduce Pollutants
Choose nontoxic chemicals and dispose of herbicides, pesticides, and cleaning products properly.
3. Reduce Waste
Cut down on what you throw away.
Around Town
4. Shop Wisely
Choose sustainable seafood. Buy less plastic and bring a reusable bag.
5. Reduce Vehicle Pollution
Use fuel efficient vehicles, carpool or ride a bike.
6. Use Less Energy
Choose energy efficient light bulbs and don't overset your thermostat.
On the Water
7. Fish Responsibly
Follow "catch and release" practices and keep more fish alive.
8. Practice Safe Boating
Anchor in sandy areas far from coral and sea grasses. Adhere to "no wake" zones.
9. Respect Habitat
Healthy habitat and survival go hand in hand. Treat with care.
10. Anytime, Anywhere
Volunteer
Volunteer for cleanups at the beach and in your community. You can get involved in protecting your watershed too!
Hope this helps
Magnesium metal reacts with oxygen according to the equation: Mg(s) + O2(g) → 2MgO2(s)
Which of the following would increase the rate of the reaction?
grinding the magnesium metal into a fine powder
packing the magnesium tightly at the bottom of the container
forming the magnesium metal into the shape of a sphere
forming the magnesium metal into single, large cube
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Answer:
Grinding the magnesium metal into a fine powder. I took the test and got it right.
Should American drugmakers have to limit acetaminophen pills sold over-the-counter?
Answers
Answer: The agency requires all prescription drugs containing acetaminophen to carry a black box warning that an overdose can result in liver transplant or death. For over-the-counter Tylenol and its generic equivalents, the FDA requires no warning that overdose can be fatal.
Explanation:
^^^^
atoms of which of elements will form covalent bonds in a compound
A. C and O
B. Na and F
C. Co and Fe
D. Li and Al
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2.91 moles of aluminum are how many grams(with work)
Answers
What is the best explanation for the fact that Styrofoam will not dissolve in water, but Styrofoam will dissolve in acetone?
1.styrofoam is polar and water is nonpolar
2.styrofoam is nonpolar and water is polar
3.Styrofoam is polar and water is polar
4.styrofoam is nonpolar and water is nonpolar
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Calculate the potential energy of a block of mass of mass 0.3kg and at a height 2.6m above the ground.(take acceleration due to gravity:10m/s)
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Explanation:
Mass (m)=0.3 kg
height(h)=2.6 m
acceleration due to gravity (g)=10m/s^2
Potential energy= MGH
=0.3×10×2.6
7.8 J
Give brainliest if u can
If you have 8 g of a radioactive element there will be Of the radioactive element left after one half life
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Answer:
4g of the radioactive element present
Explanation:
Radioactive elements are atoms that are unstable in normal conditions and are converted in another different atoms.
1 half life express the time that is need to decay the half of the initial amount of the radioactive element.
If initially we have 8g of the radioactive element, after 1 life we will have 8g/2 =
4g of the radioactive element present
2 H2(g) + O2 (g) --> 2 H20 (1)
How many moles of hydrogen gas do you need to make 2 moles of liquid water?
Answers
Answer:
4moles of hydrogen atoms
Explanation:
The second conversion factor reflects the number of atoms contained within each molecule. Two water molecules contain 4 hydrogen atoms and 2 oxygen atoms. A mole of water molecules contains 2 moles of hydrogen atoms and 1 mole of oxygen atoms.
Which type of circuit has more than one path?
Answers
Answer:
parallel circuit
Explanation:
Hope this is right!!
what are the 5 similarities between acid and alkalis
Answers
Explanation:
Acids and alkalis both contain ions. Acids contain lots of hydrogen ions, which have the symbol H+. Alkalis contain lots of hydroxide ions, symbol OH-. Water is neutral because the number of hydrogen ions is equal to the number of hydroxide ions
Answer:
cids and bases both react with water and a lot of acids and bases are soluble in nature. Both acids and bases are electrolytes which means that they're good conductors of electricity. Acids and bases both produce ions in water solution. Acids release hydrogen ions (H+) whereas Bases release hydroxide ions (OH–).
Explanation:
What type of molecule is shown below?
H H
| |
H-C-C-0-H
|
Η Η
A. Ether
B. Aldehyde
C. Ketone
D. Alcohol
Answers
The type of molecule which is shown in the given question is alcohol, due to presence of hydroxyl group.
What are functional groups?Funcional groups are those specific groups which after attaching to any compound changes the property of that compound and then that compound will known by the propeties of that functional group.
Given molecule has the molecular structure CH₃-CH₂-OH, means in this molecule hydroxyl group is present which defines the general properties of alcohol.
Hence given molecule is an alcohol.
To know more about functional groups, visit the below link:
https://brainly.com/question/493841
The Lewis diagram for AlF3 is:
:F:
The electron-pair geometry around the Al atom in AlF3 is
There is/are
lone pair(s) around the central atom, so the geometry of AlF3 is
Submit Answer
Retry Entire Group
9 more group attempts remaining
Answers
Answer:
25,000 pairs
Explanation:
What is the connection between iozination energy, electronegativity, and electron affinity of elements
Answers
Answer:
Explanation:
The three of them increase from left to right across the periods of the periodic table, and at the same time, they decrease from up to down across the groups of the periodic table.
Ionization Energy is defined as the energy required to remove the atom of an electron.
Electron affinity is defined as the change in energy when electron is added to a negative ion.
Electronegativity is the ability of an atom to attract other atoms to itself.
write in the chart which molecule is the acid,base, conjugate base,conjugate acid from the equation and watching the H+ movement
1 H2CO3 + H2O--- H3O+ +HCO3-
2 H3PO4 + H2O--- H2PO- +H3O+
3. HCO3- + H2O---H2CO3 +OH-
4 HNO3 +H2O---NO3- +H3O+
Answers
Answer:
When H2O acts as a base, it gains one H, which forms its conjugate acid, H30. ... Write the formula for the conjugate base for each of the following acids: a. ... H3PO4(aq) + H2O(l) 7 H2PO4 (aq) + H3O+(aq) ... CO32-(aq) + H2O(1) 2 HCO3 (aq) + OH(aq) ... balanced equation for the reaction of the ammonium ion with water.
If you hear a weather report say that a low pressure system is coming in, what kind of weather can you expect?
A
wind
B
polluted air
C
precipitation
D
heat
Answers
The enthalpy (AH) is +624.7 kJ for the following reaction. How would you classify this reaction? (Explain)
SiO2(g) + 3C(s) --> SIC(s) +2CO(g)
A.exothermic: heat is lost by the system
B.endothermic: heat is gained by the system
C.endothermic: heat is lost by the system
D.exothermic: heat is gained by the system
Answers
Answer: The reaction [tex]SiO_{2}(g) + 3C(s) \rightarrow SiC(s) + 2CO(g); \Delta H = +624.7 kJ[/tex] is classified as endothermic: heat is gained by the system.
Explanation:
A process or reaction in which heat is absorbed is called endothermic reaction.
For example, melting of ice is an endothermic process.
For an endothermic reaction the sign of [tex]\Delta H[/tex] is positive which means heat is gained by the system.
Here, the given reaction is as follows.
[tex]SiO_{2}(g) + 3C(s) \rightarrow SiC(s) + 2CO(g); \Delta H = +624.7 kJ[/tex]
A process or reaction in which heat is released is called exothermic reaction.
For example, combustion reaction, freezing of water etc are exothermic process.
For an exothermic reaction the sign [tex]\Delta H[/tex] is negative which means heat is lost by the system.
Thus, we can conclude that the reaction [tex]SiO_{2}(g) + 3C(s) \rightarrow SiC(s) + 2CO(g); \Delta H = +624.7 kJ[/tex] is classified as endothermic: heat is gained by the system.
What volume would be occupied by 16.0 g of CH4 at 00C and 760 mmHg?
Answers
Answer:
22.4 L
Explanation:
We'll begin by calculating the number of mole in 16.0 g of CH₄. This can be obtained as follow:
Molar mass of CH₄ = 12 + (4×1)
= 12 + 4
= 16 g/mol
Mass of CH₄ = 16 g
Mole of CH₄ =?
Mole = mass / molar mass
Mole of CH₄ = 16 / 16
Mole of CH₄ = 1 mole
Finally, we shall determine the volume of the gas. This can be obtained as follow:
Number of mole of CH₄ (n) = 1 mole
Pressure (P) = 760 mmHg = 1 atm
Temperature (T) = 0°C = 273 K
Gas constant (R) = 0.0821 atm.L/Kmol
Volume (V)?
PV = nRT
1 × V = 1 × 0.0821 × 273
V = 22.4 L
Therefore, the volume of the gas is 22.4 L
what is Nylon 6-6 made of..?
Answers
Answer:
nylon 66 is made of two monomers each containing 6 carbon atoms, hexamethylenediamine and adipic acid.
What is the number of moles of Sodium Chloride (NaCl) that is present in 29.22g sample of it?
Answers
to find moles of a compound you would look at the periodic table to find the mass. in this case, the mass of NaCl is 58.44 g/mol. now, you divide the sample mass of 29.22g by 58.44 g/mol. the grams will cancel each other out and you’re left with 0.5 mol in that sample
hope this helps!
Answer:
[tex]\boxed {\boxed {\sf 0.5000 \ mol \ NaCl}}[/tex]
Explanation:
We are asked to convert grams to moles. We must use the molar mass or the grams in 1 mole of a substance. These values are found on the Periodic Table as the atomic mass, but the units are grams per mole (g/mol) instead of atomic mass units (amu).
We are given the compound sodium chloride or NaCl. Look up the molar masses of the individual elements.
Na: 22.9897693 g/mol Cl: 35.45 g/molThe formula for the compound does not contain any subscripts, so there is 1 mole of each element in 1 mole of the compound. Add the molar masses together to find sodium chloride's molar mass.
NaCl: 22.9897693 + 35.45= 58.4397693 g/molNow we can use the molar mass to create a ratio. We know there are 58.4397693 grams of NaCl in 1 mole of NaCl.
[tex]\frac {58.4397693 \ g \ NaCl}{ 1 \ mol \ NaCl}[/tex]
Multiply by the number of grams provided in the problem: 29.22
[tex]29.22 \ g\ NaCl*\frac {58.4397693 \ g \ NaCl}{ 1 \ mol \ NaCl}[/tex]
Flip the ratio so the units of grams of NaCl cancel.
[tex]29.22 \ g\ NaCl*\frac { 1 \ mol \ NaCl}{58.4397693 \ g \ NaCl}[/tex]
[tex]29.22*\frac { 1 \ mol \ NaCl}{58.4397693}[/tex]
[tex]\frac {29.22}{58.4397693} \ mol \ NaCl[/tex]
[tex]0.5000019738 \ mol \ NaCl[/tex]
The original measurement of grams has 4 significant figures, so our answer must have the same. For our answer, that is the ten-thousandth place. The 0 to the right of this place (0.5000019738) tells us to leave the 0 in the ten-thousandth place.
[tex]0.5000 \ mol \ NaCl[/tex]
There are approximately 0.5000 moles of sodium chloride in a 29.22 gram sample of sodium chloride.
How much energy is required to raise the temperature of a 300.0
gram block of lead from 22.3°C to 59.9°C? The specific heat of lead is
0.129 J/gºC.
Answers
Answer:
Q = 1455.12 Joules.
Explanation:
Given the following data;
Mass = 300 grams
Initial temperature = 22.3
Final temperature = 59.9°C
Specific heat capacity = 0.129 J/gºC.
To find the quantity of energy;
[tex] Q = mcdt[/tex]
Where,
Q represents the heat capacity.
m represents the mass of an object.
c represents the specific heat capacity of water.
dt represents the change in temperature.
dt represents the change in temperature.
dt = T2 - T1
dt = 59.9 - 22.3
dt = 37.6°C
Substituting the values into the equation, we have;
[tex] Q = 300*0.129*37.6 [/tex]
Q = 1455.12 Joules.
What type of erosion and deposition is not a major force in Texas
Answers
Gravity
Glaciers
Wind
Water
If the half-life of a decaying isotope is 10 years, which statement is true after
20 years?
Answers
Answer:
A. There are more daughter nuclei than parent nuclei in a sample.
Explanation:
There are more daughter nuclei than parent nuclei in a sample. Hence, option A is correct.
What is half-life?The half-life of a radioactive element or isotope is the time taken for half of the substance to decay.
If the half-life of a decaying isotope is 10 years, after 8 years, less than the total mass of the original isotope will decay since 8 years is less than 10 years.
Therefore, we can conclude that, if the half-life of a decaying isotope is 10 years, after 8 years, there will be more parent nuclei than daughter nuclei in a sample.
Learn more about half-life here:
https://brainly.com/question/24710827
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Which forward reaction shows an increase in entropy (disorder)?explain
A.H2(g) + CuO (s) --> H2O(l) + Cu(s)
B.HCl(g) + NH3(g) --> NH4Cl(s)
C.CaCO3(s) -> CaO(s) + CO2g)
D.H2O(g) + O2(g) --> 2H2O)
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Explanation:
Entropy also increases when solid reactants form liquid products. Entropy increases when a substance is broken up into multiple parts. The process of dissolving increases entropy because the solute particles become separated from one another when a solution is formed. Entropy increases as temperature increases. S = entropy
k_{b} = Boltzmann constant
\ln = natural logarithm
\Omega = number of microscopic configurations
Answer the following questions using the chemical equation below:
6CO2 + 6H2O => C6H12O6 + 6O2
3. How many total atoms are on the product side?
4. How many molecules of water are on the reactant side?
Answers
4. Six molecules of water on the reactant side
Select the correct answer.
A compound has an empirical formula of C2H5. What is true about this empirical formula?
ОА It models the structure of the compound.
ОВ. It shows the ratio of elements in the compound.
Ос. . It gives the mass of each atom in the compound.
OD. It indicates the number of atoms in the compound.
O E. It describes only this one compound.
Answers
Answer: OB
Explanation:
The empirical formula of an element is the simplest formula of an element which shows the ratios of atoms of the each element present in a molecule of a compound .
grade 8 chem/ science
Answers
Answer:
reactants
Explanation:
have a good day!
What causes the "heat island" effect?
a. heat produced from a large number of people
b. the materials used in building cities retain heat
c. the large amount of reflected light from glass windows
d. all of the above
Please select the best answer from the choices provided
A
B
C
D
Answers
Awnser all of them if you can its really EASY im feelin generous today 30 pts
Answers
Answer: 1. Synthetic Substance or Synthetic compound 2. Oil 3. Biofuels 4. Salt and Sugar 5. medicine 6. Synthetic 7. Background Knowledge and Visualizing
Explanation: Hope this helps! Good luck!
Answer:
1= synthetic substance
2= natural gas
3= alcohol
4=artificial musks
5= medicine
6= synthetic
7=Questioning the Text
Explanation: If my answers are correct please mark me as a brainlist.