Answer:cars
Explanation:bc it uses oil
Cars and trucks, coal-fired power plants, airplanes, large industrial operations are the four things people use every day that directly or indirectly consume fossil fuels.
What are fossil fuels?A fossil fuel is a hydrocarbon containing substance that is recovered and used as fuel that naturally forms in the Earth's crust from the remains of dead plants and animals. Fossil fuels include coal, oil, and natural gas.
A general name for non-renewable energy sources such crude oil, petroleum products, natural gas, derived gas, coal, coal products, and non-renewable wastes is "fossil fuel."
These fuels come from plants and animals that lived in the distant past of the earth's history, such as millions of years ago.
Therefore, fossil fuels can be burned to produce energy, operate engines, or offer direct heat.
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A 1500mL balloon is at 475 torr and the pressure increase to 900 torr. What is the new volume?
P1 = 475 torr
P2 = 900 torr
V1 = 1500 mL
V2 = ?
Applying Boyle's Law
P1V1 = P2V2
475 torr × 1500 mL = 900 torr × V2
V2 = 475 * 1500 mL / 900
V2 = 475*5/3 = 791.6 mL
Question 5
1 pts
A vinegar solution has a hydrogen ion concentration of 4.0 x 10-4 M. What is the pH?
7.8
5.6
3.4
2.4
Answer:3.4
Explanation:
How many grams (g) are in 0.250 moles of copper?
Answer:
15.89grams
Explanation:
The mass of a substance can be calculated from it's mole value by using the formula:
mole = mass/molar mass
According to this question, there are 0.250 moles of copper. Hence, the mass of copper can be calculated as follows:
Molar mass of Cu = 63.55g/mol
0.250 = mass/63.55
mass = 0.250 × 63.55
mass = 15.8875
Mass of Cu in 0.250mol is 15.89grams.
help this is an earthquake thing
Answer:
im pretty sure its a push or pull thing
Explanation:
Tensional stress is the stress that tends to pull something apart. It is the stress component perpendicular to a given surface, such as a fault plane, that results from forces applied perpendicular to the surface or from remote forces transmitted through the surrounding rock.
whivh of the following is an example of a synthesis reaction
Answer: hewo, there! your answer is Below
d.) 2CuCl + Cl2yields 2CuCl2
Explanation:
A synthesis reaction, also known as a combination reaction, is where two (or more) compounds combine to form a single compound.
Hope this helps!!!
Have a great day!!
Plz Mark branilest!!!
In which example do molecules move the fastest?
You have a block of dry ice (-40°C), an ice cube (-5°C), water (10°C), and alcohol (15°C).
O alcohol
O water
O ice cube
O dry ice
Answer:
alcohol
Explanation:
what is the percentage of oxygen in Li(NO2)3
Answer:
66.2 % of O
Explanation:
Our compound is the lithium nitrite.
LiNO₂
This salt is ionic and can be dissociated: LiNO₂ → Li⁺ + NO₂⁻
We determine the molar mass:
molar mass of Li + 3 . molar mass of N + 6 . molar mass of O
6.94 g/mol + 3. 14 g/mol + 6 . 16 g/mol = 144.94 g/mol
The mass of oxygen contained in 1 mol of lithium nitrite is:
6 . 16 g/mol = 96 g
So the percentage of oxygen present is:
(96 g / 144.94 g) . 100 = 66.2 %
PLEASE HELP
If a mineral can scratch a penny, what number is it on Mohs Scale?
Explanation:
z o o o m 85675494491 pwd eu3nFG
If red is the color on the top of the spectrum being emitted from the prism, what is the color on the bottom?
violet
yellow
green
blue
Answer:
violet
Explanation:
hope this helps!
explain why when iron is exposed to moist air rust but when aluminium is exposed to moist air it does not rust
Answer:
iron gets rusted as it is more reactive then aluminium and reacts faster with moisture in the air
Explanation:
PLEASE HELP MEEEE
this is due like in 10 min
how do you explain that 1 OF2 + H2o --> 1 O2 + 2 HF demonstrates that mass is conserved in a chemical l reaction
Answer:
* the total mass of the reactants must equal the total mass of the
products (Law of Conservation of Mass)
Chemical Equation something that uses formulas and symbols to
represent the relative amounts of the reactants
and products of a chemical reaction
Explanation:
Which statement best explains a net force?
Answer:
D. The table pushes up on the vase with the same amount of force as gravity pulling it down
Explanation:
Calculate the number of grams in 3.99 x 10 20atoms of aluminum.
Answer:
0.018 grams
Explanation:
The number of moles (n) in such number of atoms of Aluminum must be calculated by dividing the number of atoms (nA) by Avagadro's number i.e.
n = nA ÷ 6.02 × 10^23atoms
The number of atoms of Aluminum in this question has been given as: 3.99 x 10^20 atoms.
n = 3.99 x 10^20 ÷ 6.02 × 10^23
n = 3.99/6.02 × 10^(20-23)
n = 0.663 × 10^-3
n = 0.000663moles
Next, we convert the mole value to mass in grams by using the formula;
mole = mass/molar mass
mass = mole × molar mass
Molar mass of Al = 27g/mol
mass (g) = 0.000663 × 27
mass = 0.0179
mass of Aluminum is 0.018grams
GR8_Sci_67R_PhysicalScienceReview_FY21 Question: 1-3
Jimmie places a soccer ball on the ground and kicks it toward the goal. The ball moves along the ground toward the goal. Why does the ball move?
The kick decreases the weight of the ball.
The kick serves as a contact force on the ball.
The kick decreases the force of gravity acting on the ball
The kick removes friction between the ball and the ground.
Need answer ASAP
A gas occupies 850.0 mL at a temperature of 37.0 °C. What is the volume at 132.0 °C?
plz help will give brainliest
Answer:
1,110.48 mL
Explanation:
37°C is 310K and 132°C is 405K
V/V' = T/T'
850/V' = 310/405
V' = (850×405)/310
=> V' = 1110.48 mL
The student observes a great blue heron catching fish near the edge of the pond. Based on the information the student collected, which blnd will compete with the great blue heron for the same hunting spots and similar prey?
A. The mallard, because it hunts for fish while wading near the edge of the pond
B. The pied-billed grebe, because it dives in apen water to get crayfish on the bottom of the pond
C. The great egret, because it hunts in water near the edge of the pond for fish and other prey
D. None of these
Answer:
The great egret, because it hunts in water near the edge of the pond for fish and other prey
Please this is killing me I have no idea how to answer it it’s due in 10 mins please please help
How much sugar is in a 100 mL, 25% sugar solution? How much water?
Which of the following is a neutralization reaction?
a
Ca(OH)2 + 2 HCl → CaCl2 + 2 H2O
b
CaCl2 + 2 Na3PO4 → Ca3(PO4)2 + 6 NaCl
c
4 FeS + 7 O2 → 2 Fe2O3 + 4 SO2
d
SnO2 + 2 H2 → Sn + 2 H2O
Answer:
b
Explanation:
it's just be no way around it
Answer:
the first one is an acid-base reaction (neutralization)
Explanation:
hope this helps:)
A balloon is placed in a vacuum chamber (a container that all of the air can be pumped out of) and as the air is removed, the balloon increases in size/volume. This is an example of which gas law? *
Charles' Law
Boyle's Law
Gay-Lussacs Law
Grant's Law
Answer:
Boyle's Law
Explanation:
"Boyle's law, also referred to as the Boyle–Mariotte law, or Mariotte's law, is an experimental gas law that describes how the pressure of a gas tends to increase as the volume of the container decreases."
what are some consequences of using land as a resource
Urban development has been linked to many environmental problems, including air pollution, water pollution, and loss of wildlife habitat. Urban runoff often contains nutrients, sediment and toxic contaminants, and can cause not only water pollution but also large variation in stream flow and temperatures.
When jayden applies the hydrogen peroxide to Chloes dark hair, the melanin pigments in her hair will be
Answer: her hair will be oxidized
Explanation: they hydrogen peroxide works as an oxidizing agent, releasing oxygen into the melanin pigment in the hair.
Which of the following ions is formed when a base is dissolved in a solution?
A) H^+
B) O^-
C) OH^-
D) SO4^2+
Answer:
C. OH^-
Explanation:
When base is dissolved in a solution it will form [tex]OH^{-}.[/tex]
What is base?A base is just a chemical that neutralizes an acid by reacting with hydrogen ions. The majority of bases are minerals that combine with acids to produce water and salts.
What is solution?A mixture of more than one type of component is introduced as solution.
When base will dissolve in water then it will given hydroxyl ion. It can be written as.
NaOH ⇒[tex]Na^{+}+OH^{-}[/tex]
NaOH give [tex]OH^{-}.[/tex] that's why it can be referred as base.
Hence, OH- ion will form when base will be dissolved in solution.
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Scientists are creating elements for the 8th period of the periodic table. Which of the following would you expect to be true of element 119?
a. a metallic element with a large atomic radius, high ionization energy, and highly reactive.
b. a metallic element with a large atomic radius, low ionization energy, and highly reactive.
c. a metallic element with a large atomic radius, low ionization energy, but relatively unreactive.
d. a nonmetallic element with a large stomic radius, low ionization energy, and highly reactive.
Answer: A
Explanation: element 119, ununennium, is highly reactive and has high ionization energy, leave A as the only answer.
Use the periodic table to determine the missing part of this nuclear equation. 45 102 Rh → + - 1 0 e 44 102 Ru 45 103 Rh 44 103 Ru 46 102 Pd 46 101 Pd
Answer:
102/46Pd
Explanation:
The mass numbers and the atomic numbers must balance on both sides of the equation. The product side shows a beta particle, indicating that this is a beta decay equation.
Beta decay doesn’t change the mass number of the original atom, so the mass number of the atom on the product side will be the same as the mass number of the atom on the reactant side, 102.
The sum of the atomic numbers on the product side needs to be 45, which is the atomic number of the reactant side. So, the atom on the product side must have a mass number of 46.
Use the periodic table to find the element to be palladium (102/46Pd).
Weather along most fronts is usually cloudy with precipitation because the warm air along most fronts usually
A) sinking and cooling, causing water to evaporate
B) sinking and warming, causing water to evaporate
C) rising and cooling, causing water vapor to condense
D) rising and warming, causing water vapor to condense
Cloudy with precipitation occurs due to rising and cooling causing water vapor to condense.
Causes of cloudy with precipitationWeather along most fronts is usually cloudy with precipitation because the warm air present along most fronts usually rising and cooling which causes water vapor to condense. Warm fronts often bring stormy weather as the warm air rises above the cool air mass that makes clouds and storms.
These clouds form in the warm air that is located high above the cool air. As the front passes over a region, the clouds become lower which leads to rainfall so we can conclude that cloudy with precipitation occurs due to rising and cooling causing water vapor to condense.
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write a chemical reaction which is carried out by catalyst with balanced equation
Answer:
CH2 = CH2 + 1/2 O2 -Ag--> CH2-O-CH2
Explanation:
Producing Epoxyethane by reacting ethene in presence of a silver catalyst with a limited amount of oxygen. The temperature range of the reaction is 250 - 300°C.
The balanced reaction is as follows -
CH2 = CH2 + 1/2 O2 (Reactants) -silver catalyst--> CH2-O-CH2 (Product)
How many moles ofO are present in 3.5 mol of Al2(SO4)3
Answer:
Name of the compound is aluminum sulphate. chemical formula Al2(SO4)3
In that compound there are two aluminum atoms; three sulphur and 4*3=12 oxygen atoms.
2 oxygen atoms is equivalent to 1 mole oxygen.
so 12 oxygen is equivalent to 12÷2=6 mole oxygen.
Select all types of muscles.
Skeletal
ℍ
Cardiac
Stretch
Smooth
Answer:
Skeletal
Cardiac
Smooth
Explanation:
The body contains three types of muscle tissue: skeletal muscle, cardiac muscle, and smooth muscl
This image shows the rock cycle.
Which event most likely occurs at point V?
cooling
erosion
heating
melting
Answer:
it is Thy First option
Explanation:
How many moles are present in 1.25x1023 molecules of salt (NaCl)?
Answer:
0.21 mole of NaCl
Explanation:
From the question,
using Avogadro's Constant,
1 mole of every compound contains 6.02×10²³ molecules of that compound.
I.e
1 mole of NaCl ⇒ 6.02×10²³ molecules of NaCl
x moles of NaCl ⇒ 1.25××10²³ molecules of NaCl
Solving for x,
x moles of NaCl = (1 mole of NaCl)×(1.25×10²³ molecules of NaCl)/(6.02×10²³ molecules of NaCl)
x moles of NaCl = (1×1.25×10²³)/6.02×10²³
x = 0.208 mole of NaCl
x ≈ 0.21 mole of NaCl