Answer:
The newspaper article's statement is correct since the mass of CO₂ reduced = 1071.85 pounds
Explanation:
Equation for the combustion of gasoline (octane) is given below:
2C₈H₁₈ + 25O₂ ----> 16CO₂ + 18H₂O
Density of C₈H₁₈ = 0.8 g/mL
Assuming mileage of the car is 20 miles/gallon; 1 gallon = 3.785 L
Since 20 miles is reduced in driving each week, thereby saving 1 gallon of gasoline, number of litres of gasoline reduced in a year is given by;
52 * 3.785 L = 196.82 L = 196820 mL
density = mass/volume; mass = density * volume
mass of gasoline saved = 0.8 g/mL * 196820 mL = 157456 g
number of moles = mass/molar mass
Molar mass of C₈H₁₈ = 114 g/mol
number of moles of C₈H₁₈ in 157456 g = 157456 g / 114 g/mol = 1381.2 moles
From the equation of reaction, 2 moles of C₈H₁₈ produces 16 moles of CO₂
1381.2 moles of C₈H₁₈ will produce 1381.2 * 16/2 moles of CO₂ = 11049.6 moles of CO₂
mass = number of moles * molar mass
molar mass of CO₂ = 44 g/mol
mass of CO₂ = 11049.6 moles * 44 g/mol = 486182.4 g
1 g = 0.00220462 pounds
Therefore mass of CO₂ reduced = 486182.4 g * 0.00220462 lb/g
mass of CO₂ reduced = 1071.85 pounds
Therefore, the newspaper article's statement is correct
Match the term (exothermic) with the correct definition.
energy goes into the chemical and cool downs the surrounding area.
energy leaves the chemical and cools down the surrounding area
energy leaves the chemical and heats up the surrounding area
Answer:
energy leaves the chemical and heats up the surrounding area
Explanation:
If the pressure of a 2.00 L sample of gas is 50.0 kPa, what pressure does the gas exert if its volume is decreased to 20.0 mL?
Which equation should you use?
use B.
✔ 5000
kPa
Answer:
P₂ = 5000 KPa
Explanation:
Given data:
Initial volume = 2.00 L
Initial pressure = 50.0 KPa
Final volume = 20.0 mL (20/1000=0.02 L)
Final pressure = ?
Solution:
The given problem will be solved through the Boly's law,
"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"
Mathematical expression:
P₁V₁ = P₂V₂
P₁ = Initial pressure
V₁ = initial volume
P₂ = final pressure
V₂ = final volume
Now we will put the values in formula,
P₁V₁ = P₂V₂
50.0 KPa × 2.00L = P₂ × 0.02 L
P₂ = 100 KPa. L/0.02 L
P₂ = 5000 KPa
What are the common characteristics among acidic compounds? Basic?
Answer:
turns blue litmus red
reacts with metal
increase hydrogen concentration
Given the balanced equation representing a reaction:
4Al(s) + 3O2(g) → 2Al2O3(s)
Which type of chemical reaction is represented by this equation?
Answer:
The equation is already balanced.
The type of chemical reaction is oxidation
Explanation:
Oxidation is the addition of oxygen to a substance
Answer:
This type of reaction is a synthesis reaction
Explanation:
______elements that have a longer half-life are more _______ than those that have a shorter half-life.
Answer:
Radioactive elements
Stable
Explanation:
Radioactive elements that have a longer half-life are more stable than those that a shorter half-life.
Half-life is the time taken for half of a radioactive element to decay by half of its original composition.
Now, if a substance have a long half-life, it is more stable and takes time to break down. For atoms with a short life, they are highly unstable and breaks down readily and easily.
HELP PLEASE!!!!!!!!
Earth's atmosphere blocks short wavelengths of the electromagnetic spectrum. Which telescopes must be places in orbit around Earth in order to observe short-wavelength radiation?
Answer: gamma-ray telescopes
Explanation:
this is the answer because the question is asking what telescope must be
placed to observe SHORT-WAVELENGTH radiation. Gamma-rays have very short wave-lengths so therefore it would be gamma-ray telescopes. visible, infrared, and radio all have long wave-lengths, so we can instantly eliminate them.
The Earth's atmosphere is known to be able to blocks all X-rays from space. telescopes must be places in orbit around Earth in order to observe short-wavelength radiation is gamma-ray telescope.
X-rays is known to have high energy that are in reflecting telescope. Gamma rays from space is commonly blocked by the Earth's atmosphere as the radiation is lethal.
Gamma-ray telescope is known to be an instrument that is created to detect and resolve gamma rays from space. that is beyond Earth's atmosphere.This rays are able too be detected by the optical flashes that they emit when interacting with the material in a particular defined instrument.
Learn more about Gamma-ray telescope from
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We breathe it out and it takes it in. Your next clue is where photosynthesis begins.
Answer:
Carbon Dioxide?
Explanation:
When we take a breath, we pull air into our lungs that contains mostly nitrogen and oxygen. When we exhale, we breathe out mostly carbon dioxide.
6. Write the full symbol for an atom with 1 proton, 2 neutrons, and 0 electrons.
Answer:
The element hydrogen has the simplest atoms, each with just one proton and one electron. The proton forms the nucleus, while the electron orbits around it.
Explanation:
im not sure for this one please help me
Answer:
Fairly certain it is the tension of the string
Answer:It would be C
I'll give brainliest
Answer: Nitrogen
Explanation:
Record the mass of the object based on the reading from the triple-beam balance. The mass of the object is ____ grams.
Hello!
[tex]\large\boxed{167g}[/tex]
Looking at the balance, we see that:
The middle beam reads 100g.
The top beam reads 60g.
The bottom beam reads 7g.
Add all of the numbers together to get the total mass:
100 + 60 + 7 = 167g.
The mass of the object is 167 grams.
Explanation:
A triple beam balance is a mass measuring instrument used in labs to measure the mass of a substance. It unit in which it measures is grams. It consists of three beams which are: The middle beam has Increments of 100 grams The front beam has Increments from 0 grams to 10 grams The farther beam has Increments of 10 gramsGiven :
Readings of all the scales of three beams of the triple beam balance of an object.
To find :
The mass of object whose reading on triple beam balance is given.
Solution:
Middle beam reader at 100 grams
Front beam reader at 7 grams
Farther beam reader at 60 grams
The mass of object:
[tex]100 grams + 7 garms + 60 grams = 167 grams[/tex]
The mass of the object is 167 grams.
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formula equation is more informative than a word equation why
Answer:
yes
Explanation:
this is because the formula equation shows the details on how they solved the equation
1. H2SO4, sulfuric acid, contains three different types of atoms: hydrogen (H), sulfur (S), and oxygen (O). Each of these atoms represents a different . Since the three types are combined in a fixed ratio, this means that H2SO4 is a(n) molecule. 2. The smallest unit of matter that retain all of the physical properties of that type of matter is a(n) atom. 3. is anything that occupies space and/or has any substance. 4. If two or more atoms are bonded together, they form a(n) . 5. The scientific study of matter is called . 6. Within a plant, water (H2O) and carbon dioxide (CO2) can be combined (using the energy of sunlight) to produce glucose (C6H12O6) and oxygen (O2). If you were to write out this chemical reaction, water and carbon dioxide are each an example of a(n) while glucose and
Answer:
The blanks can be completed with words in the following sequence
1) elements
compound
2) atom
3) matter
4) compound
5) chemistry
6) reactants
product
Explanation:
In H2SO4, atoms of hydrogen, sulphur and oxygen represent different elements that are combined to form the compound.
The smallest indivisible unit of matter that still retains all the properties of matter is an atom. Matter is anything that has weight and occupy space.
Atoms combine in fixed ratios to form compounds. Chemistry studies matter scientifically and pays specific attention to the changes that matter undergoes.
Considering the reaction of photosynthesis, water and carbon dioxide combine to give glucose so the water and carbon dioxide are reactants while the glucose is the product of the reaction.
If an ion gains one or more electrons, it becomes a
Answer:a negative charge
Explanation:
while an atom that gains electrons and becomes negatively charged is known as an anion.
Please help me It would mean everything!!
1. high
You are correct.
Cold region have more air pressure because air is denser.
BRAINIEST IF ANSWERED which of the following is a molecule ( A.HCl B.HK C.MgCl2 D.Kl)
Answer: A.HCI
Explanation:
When a 0.4500 g sample of impure potassium chloride was dissolved in water and treated with an excess ofsilver nitrate, 0.8402 g of silver chloride was precipitated. Calculate the percentage KCl in the original sample.
Answer:
97.78% KCl in the original sample
Explanation:
The % of KCl in the original sample would be as follows:
[tex]97.78[/tex]%
Given that,
Amount of sample of impure Potassium Chloride [tex]= 0.4500 g[/tex]
Amount of Silver Nitrate precipitated [tex]= 0.8402g[/tex]
Now,
Molarity of KCl = [tex]74.5 g/mol[/tex]
Minimum moles required for reaction [tex]= 0.0059 mol[/tex]
Final number of moles [tex]= 0.0059 mol[/tex]
So,
Concentration = Number of moles * Molarity
[tex]= 0.0059 mol * 0.74.5 g/mol\\= 0.440g[/tex]
Therefore,
% of KCl in the original Sample = Weight of Pure KCl/Weight of Impure KCl
[tex]= 0.440/0.450[/tex] × [tex]100[/tex]
[tex]= 97.78[/tex]%
Thus, [tex]97.78[/tex]% is the correct answer.
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Why are ocean currents important to coastal regions?
Answer:
Warm and cold ocean currents can affect the climate of an area along the coast if the winds blow in from the ocean. Warm ocean currents heat the air above the water and carry the warm air to the land, increasing the temperature of the coastal region.
Explanation:
Ocean currents are important to coastal regions for a number of reasons.
What are the importance?Distribute heat. Ocean currents distribute heat around the globe, which helps to moderate the climate in coastal regions. For example, the Gulf Stream brings warm water from the Gulf of Mexico to the coasts of Europe, which helps to keep Europe's climate warmer than it would be otherwise.
Transport nutrients. Ocean currents transport nutrients from the ocean's depths to the surface, which supports marine life. For example, the California Current brings nutrients from the deep ocean to the surface, which supports a rich marine ecosystem off the coast of California.
Diversify marine life. Ocean currents help to diversify marine life by transporting different species to different parts of the ocean. For example, the Kuroshio Current brings warm water from the western Pacific Ocean to the eastern Pacific Ocean, which has helped to diversify the marine life in this region.
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#SPJ6
Click the picture please
Answer:
A chemical change can be indicated by a change in color, change in temperature (exothermic or endothermic), change in smell, formation of a precipitate, or the formation of gas bubbles.
Explanation:
this should work
The density of red wine is 1.01g/cm3 and the density of olive oil is 0.92g/cm3.A salad dressing that consisted of these two ingredients was left sitting too long.The ingredients separated in the bottle ,which ingredient is which layer? Explain.
Answer:
The olive oil will be on top of the vinegar, this is because the density is more
Explanation:
since vinegar has a higher density than oil it will sink to the bottom of the bottle. subsequently oil will raise up. thus oil higher layer vinegar lower layer! :) . concentration in g/L....what u are given is 5.4g and 50ml
so first change the ml into L
50ml = 0.050L
now... 5.4g/0.050L = 108g/L
resolve in significant figures is 1.1 x 10^2 g/L
b. molarity = mol/L
L = 0.050 (calculated from above)
now we only have to convert the grams (5.4g) into mols
there are three elements in sucrose ( C = carbon, H = hydrogen
and O = oxygen)
look at the periodic table and find their molar mass (atomic weight)
Carbon = 12.0g/mol
Hydrogen = 1.00g/mol
Oxygen = 16.0g/mol
Sucrose contains 12 carbons, 22 hydrogens, and 11 oxygens
So the total molar mass of sucrose =
Carbon - 12 x 12.0 = 144
Hydrogen - 22 x 1.00 = 22
Oxygen - 11 x 16.0 = 176
Total = 144 + 22 + 176 = 342g/mol
Now u have 5.4grams of sucrose to change to mols u:
5.4 grams x 1 mol/ 342grams
in other words 5.4 grams / 342 grams leaving u with mols
= 0.0158 mols
now your concentration in molarity will be:
0.0158 mols / 0.050L = 0.32M (two significant figures)
and the unit is M which stands for mol/L
c. you are given 7M (aka mol/L)
you are given 100ml which equals 0.1L
7 mol/L x 0.1L = 0.7mol
all u have left to do is change the 0.7 mol back into grams
to do that we do the opposite of what we did in part b
in part b u took grams and changed it into mols
here we are taking mols and changing it back into grams
from part b we calculated the total molar mass = 342g/mol
so:
0.7 mol x 342 g/mol = 239.4grams
resolve into significant figures = 2 x 10^2 grams
How do i caculate speed
Answer:
Speed uses the same units as velocity, which is meters divided by seconds (m/s)(It doesn't need to be m/s, but it's the most common unit. It's basically any unit of length divided by any unit of time)
hope this helps and good luck
Answer/Explanation:
Speed is a force and is solved by using acceleration.
You can use the problem to solve for force:
F= MA or Force equals mass times acceleration.
collectiveness leads to a good society? how
Answer:
A good society has a transparent talk, they share all matters related to the society, hence everyone knows what's going on. This is why collectiveness leads to a good society.
If my answer helped, kindly mark me as the brainliest!!
Thank You!!
perform the following operation and express the answer in scientific notation
Answer:
2×10⁻⁴
Explanation:
Given data:
2.8 ×10⁻⁶ + 1.4×10⁻²
Solution:
2.8 ×10⁻⁶ + 1.4×10⁻²
2×10⁻⁶⁺²
2×10⁻⁴
Scientific notation is the way to express the large value in short form.
The number in scientific notation have two parts.
. The digits (decimal point will place after first digit)
× 10 ( the power which put the decimal point where it should be)
for example the number 6324.4 in scientific notation will be written as = 6.3244 × 10³
1. How many times will a mole of paperclips (think giant paperclip chain) stretch around the equator of the
earth? (1 paperclip = 0.030 m, Earth's circumference = 4.00 x 10m)
What is the name of the group that contains potassium?
O Noble Gases
O Halogens
O Alkaline Earth Metals
O Alkali Metals
Transition Metals
Answer:
Alkali Metals
Explanation:
Which of the following best describes a vacuum?
Hot
Cold
Shiny
Empty
Answer:
hot
Explanation:
Answer:
The Answer is (Empty)
(02.01 LC)
Which landform represents a large area of thick ice that moves slowly?
Answer:
Glacier
Explanation:
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Answer:
Synthesis
General Formulas and Concepts:
Chemistry - Reactions
Synthesis Reactions: A + B → AB Decomposition Reactions: AB → A + B Single-Replacement Reactions: A + BC → AB + C Double-Replacement Reactions: AB + CD → AD + BCExplanation:
Step 1: Define RxN
RxN: NH₃ + H₂SO₄ → (NH₄)₂SO₄
Step 2: Identify
Combining 2 compounds to form 1.
NH₃ + H₂SO₄ → (NH₄)₂SO₄
A + B → AB
It is a Synthesis Reaction.
explain how you would obtain pure water from tap water.Your answer must include reference to the principles involved under the topic separating mixture
Answer:
Simple distillation