Cows and other ruminants are significant producers of the greenhouse gas methane—contributing 37 percent of the methane emissions resulting from human activity.
What is greenhouse gas?Greenhouse gases (also known as GHGs) are gases in the earth's atmosphere that trap heat. During the day, the sun shines through the atmosphere, warming the earth's surface. At night, earth's surface cools, releasing heat back into the air. But some of the heat is trapped by the greenhouse gases in the atmosphere.
While carbon dioxide is typically painted as the bad boy of greenhouse gases, methane is roughly 30 times more potent as a heat-trapping gas. As temperatures rise, the relative increase of methane emissions will outpace that of carbon dioxide from these sources, the researchers report.
The cow's ramen is like a large fermentation vat. More than 200 different bacteria and 20 types of protozoa help the cow to utilize fibrous feed stuffs and non-protein nitrogen sources. Bacteria adhere to the feed and gradually digest the fermentable material.“You can probably reduce methane by about 20-25% by altering diet,” he says.
One study by researchers at the University of California, Davis, estimated it might be possible to reduce global methane emissions from cows by 15% by changing their diet.
Thus, this evidence support the passage.
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What is the correct way to report the length of the rectangle in centimeters ?
The length of the rectangle is 16 cm.
What is the length of the rectangle?We know that area is the product of the rectangle is the product of the length and the breadth of the rectangle. The perimeter of the rectangle is the distance round the rectangle. In this case, the rectangle has been showed in the image attached to the question.
We can see the meter rule which is the instrument that is used in the measurement of length. The meter rule is often calibrated in accordance with the metric system or the subunits of the metric system.
Having looked at the measurement is shown in the image shown, it is then clear that the length of the rectangle is 16 cm.
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32. Describe how scientific notation makes it easier to
work with very large or very small numbers.
Scientific notation makes it easier to work with very large or very small numbers because it makes a very small or large number into a shorter one.
How scientific notation makes it easier to work with very large or very small numbers?Scientific notation makes it easy to compare numbers that have very large values because all the zeroes have been replaced with small number which can be read easily. In scientific notation, numbers with a greater exponent are bigger than numbers with a small or less exponent because higher exponent shows the larger value and smaller value represents smaller value. So that's why scientific notation make easier to write or read a very large or small number.
So we can conclude that Scientific notation makes it easier to work with very large or very small numbers because it makes a very small or large number into a shorter one.
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Question 19
When the reaction here goes in the backwards direction what is acting as the base?
H3O+ PH3 PH4* + H₂O.
OPH₂*
O H₂O
OPH₂
O H₂O*
1.5 p
1000 in² = ? yd.
Could sb help me out
Answer:
um 27 yards..............
The density of copper is 8.92g/cm³. If a 10.00g sample is placed in a graduated cylinder that
contains 15.0mL of water, what is the total volume?
The total volume of sample with given density and mass of copper is 16.815 cm³.
Equation :volume of copper = mass / density
v = 10.00g / 8.92g/cm³
v = 1.121 cm³
So to calculate total of volume of given sample,
Total volume = Volume of copper x Volume of water
V = 1.121 x 15.0
V = 16.815 cm³
What is volume ?A solid shape's capacity is measured using volume, a three-dimensional quantity. It implies that a closed figure's volume determines how much three-dimensional space it can occupy. A derived unit called the cubic meter (m3) serves as the SI unit of volume. The cubic decimeter is referred to as a "liter" (L) (dm3).
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Round the answer of the following calculation to the correct number of significant figures;
3700 20.1 x 5.60 x 0.0407
The calculation gives the product 17000 to 2 significant figures
What are significant figures in a calculation?Significant figures in a calculation or a number refers to the number of non-zero numbers that are present in a number.
If the number contains a decimal point, the number of non-zero numbers before the decimal point gives the number of significant figures.
However, if a zero occurs between non-zero numbers, it is considered significant.
Significant figures are used in approximation to indicate to what point a set of numbers become significant.
In a calculation, the number significant figure is determined by the number which has the lowest number of significant figures.
In the given calculation, the lowest significant figure is in the numbers 3700 and 5.60
3700 × 20.1 × 5.60 × 0.0407 = 17000 to 2 significant figures
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if you can please answer both
Answer: C & D
Explaination:
C because the atomic number increases sequentially and also the nuclear charge
D because as you're moving down a column the valance electrons does not change, only the atomic radius does.
If you ride your bicycle down a straight road for 500 m then turn around and ride back, your distance is ____your displacement.
Answer:
Greater than
Explanation:
Emission and absorption line spectra both provide evidence for which of the following:
a. the existence of isotopes
b. the existence of energy levels within the atom
c. the existence of sub-atomic particles
d. the existence of ions
B. The emission and absorption line spectra both provide evidence for the existence of energy levels within the atom.
What is emission of line spectrum?
An emission of line spectrum occurs when energy is added to an atom due to difference in energy level.
An emission line will appear in a spectrum if the source emits specific wavelengths of radiation.
What is absorption line spectrum?An absorption spectrum occurs when light passes through a cold, dilute gas and atoms in the gas absorb at characteristic frequencies due to difference in energy level.
Thus, the emission and absorption line spectra both provide evidence for the existence of energy levels within the atom.
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Calculate the mass of boron present in 30 g of borax.
the mass of boron present in 30 g of borax is 1.991×10²⁴
Chemical element boron has the atomic number 5 and the letter B in its symbol. It is an amorphous brown powder and a brittle, black, glossy metalloid in its crystalline form. There may be antioxidant effects of boron. Boron is frequently used to treat vaginal yeast infections and boron insufficiency. Additionally, it is used to treat menstrual cramps, osteoarthritis, osteoporosis, and numerous other ailments, but many of these applications lack strong scientific backing.
Molar mass of B = 10.81g/mol
So, 1 mole of B = 10.81g
and 1 mole = NA= 6.023×10²³
By combining,
10.81g of B = 6.023×10²³ atoms of B thus,
35.76g of B = 6.023×10²³
10.81×35.76
35.76g of B
= 1.991*10²⁴
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2.5 g Ti, 1.7 g F2
Express your answer using two significant figures
The theoretical yield of titanium tetrafluoride is 2.79 g
What is the theoretical yield?We know that the theoretical yield is the yield of the product that we can obtain from the stoichiometry of the problem. We now have to go back to the reaction equation and write;
[tex]Ti(s) + 2F_{2} (g) --- > TiF_{4} (s)[/tex]
Number of Ti = 2.5g/48 g/mol = 0.052 moles
Number of moles of F2 = 1.7 g/38 g/mol 0.045 moles
If 1 mole of Ti reacts with 2 moles of F2
0.052 moles reacts with 0.052 moles * 2 moles/1 mole
= 0.10 moles
We can see that F2 is the limiting reactant
If 2 moles of F2 1 mole of [tex]TiF_{4}[/tex]
0.045 moles of F2 produces 0.045 moles * 1 mole/2 moles
= 0.0225 moles
Mass of titanium tetrafluoride = 0.0225 moles * 124 g/mol
= 2.79 g
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Given that the work function of chromium is 4.40 eV calculate the kinetic energy of electrons emitted from chromium surface that is irradiated with ultraviolet radiation of wavelength 200.0 nm.
The kinetic energy of electrons emitted from chromium surface is determined as 2.9 x 10⁻¹⁹ J.
Energy of the emitted photon
The energy of the emitted photon is calculated as follows;
E = hf
E = hc/λ
where;
h is Planck's constantc is speed of lightλ is wavelength of the photonE = (6.626 x 10⁻³⁴ x 3 x 10⁸) / (200 x 10⁻⁹)
E = 9.94 x 10⁻¹⁹ J
Work function of the chromium is joulesΦ = 4.4 x 1.6 x 10⁻¹⁹
Φ = 7.04 x 10⁻¹⁹ J
Kinetic energy of the electronE = K.E + Φ
K.E = E - Φ
K.E = 9.94 x 10⁻¹⁹ J - 7.04 x 10⁻¹⁹ J
K.E = 2.9 x 10⁻¹⁹ J
Thus, the kinetic energy of electrons emitted from chromium surface is determined as 2.9 x 10⁻¹⁹ J.
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Which of the following processes requires more heat energy?
a. raising the temperature of 100. g of water by 10.0 °C
b. raising the temperature of 100. g of aluminum by 10.0 °C?
Raising the temperature of 100 grams of water by 10.0 C is one of those processes which requires more heat energy.
What degree of heat can 100 grams of water withstand?30.514KJ is the amount of heat can 100 grams of water withstand.
Water has a volume of 100 milliliters and weighs 100 grams. (100°C - 27°C) is the temperature difference, which equals 73°C. Water has a specific heat of 4.18 J/g/°C, thus we can apply the calculation below to determine how much energy is required. The necessary energy is equal to 30.514KJ for 100g at 73°C and 4.18 J/g/°C.
What happens to water's thermal energy as it transforms from a liquid to a solid state?Once all of its thermal energy is gone, water freezes, changing from a liquid to a solid. In our daily lives, these kinds of occurrences constantly occur. Puddles, ponds, lakes, and even parts of oceans freeze when the water gets cold enough. In colder climates, the surface water on Earth freezes and solidifies.
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All of the following are phases of matter except *
A solid
OB liquid
OC gas
Lighting
Answer:
lighting bru
Explanation:
While camping, you make a snack over a campfire. You roast a marshmallow over the campfire until it is browned and put it between some chocolate and graham crackers. When you take a bite, you notice that the chocolate and marshmallow have melted slightly.
Which statement correctly identifies a part of this process as a physical or a chemical change?
A. The melting of the chocolate is a chemical change
B. The digestion of the food is a physical change
C. The toasting of the marshmallow is a chemical change
D. The burning of the wood for the campfire is a physical change
The answer is C. The toasting of the marshmallow is a chemical change.
Why?
Based on the other options:
A.) The melting of the chocolate ISNT a chemical change. It's a physical change.
B.) The digestion of food is NOT a physical change. It's a chemical change.
D. The burning of the wood for the campfire is NOT a physical change. It's a chemical change.
Physical Change: Doesn’t change the composition of the matter. However, its physical appearance and properties can change.
Chemical Change: During chemical changes, the matter that you start with isn’t the matter you end up with.
What is the volume of foil for 14.45cm times 8.55 cm times 0.550 g
The volume of foil for 14.45cm times 8.55 cm times 0.550 g is
67.95 cm^3
Volume = lenght * breadth * height
= 14.45cm * 8.55 cm * 0.550 cm
= 67.95 cm^3
Volume is the amount of space an object take upA measure of the size of a body or region in three-dimensional space.amount of space occupied by an object L x W x Hcubic centimeters is the basic unit for measuring the volume of solids and gasesvolume is a Three Dimensional existing in three dimensions; having length, width, and height.Cubic Yard is the volume of a cube is one yard on each side.Cubic Meter is the volume of a cube is one meter on each side.To know more about Volume visit :
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What is the molarity of a substance in which 10.8 grams per f calcium chloride is dissolved in enough water to make to make 125 mL of solution?
The moles of solute per liter of solution is measured as molarity. For instance, when table salt is dissolved in water, water serves as both the solution and the solute. Sodium chloride weights 58.44 grams per mole. 58.44 grams of sodium chloride dissolve in one liter of water to form a one molar solution, or 1M.
What is the molarity of a substance in which 10.8 grams per f calcium chloride is dissolved in enough water to make to make 125 mL of solution?
"2.7 moles"
Rearranging Molarity is determined by multiplying moles by litres.
Litres times molarity equals moles.
The amount of water in 125 g is similar to 125 ml, or 0.125 litre.
The number of moles is 0.125 x 2 = 0.25 mol since the molarity is 2.0M.
To get the answer of 10.8g, simply multiply this by the molar mass of calcium chloride, which is 110.98 g/mol.
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I need some help with crush advise. So basically i have a crush on this dude but i don't think he know me we are not in the same class but we see each other at morning time and recess by the way he is Vietnamese and he is cute. If you have some advice. ( PLEASE TELL ME) please don't just steal the points, really help me out
Answer:
Go for it!
Explanation:
You only live once, seriously just go up and talk to him. Say something like, "Hey, you seemed cool I just wanted to say hi. Do you have an ig?" :) you won't regret it.
Answer:
There are a couple of things you should do! first, you should become his friend, and be a good friend, too. Don't fl!rt with him when you first meet, or in the first couple of times you guys meet. Ask him things you are genuinely curious to know about him, don't ask generic questions such as " whats your favorite color" or make small talk. Ask him things that relate to him more like what's his full name, or where is he from. If you really are curious to know what his favorite color is, you can ask him, but make sure he knows you are genuinely curious to know, and not just making small talk. After getting to know him better, you have to ask yourself if you are still interested in him in "that" way, or interested at all, even. If the answer is yes, you still have love interest the next thing you should know is if he is single, or likes someone. When you ask him if hes single don't make it weird if he says no, just be chill. If he is single, but has a crush on someone you should ask him who. If he doesn't tell you and you guys are close already, it's probably you. After finding out all these things about him, you should wait about 2 months and then confess to him that you like him (if he has not already confessed to you) and no worries if he rejects you, rejection happens sometimes and it's totally okay. It may not feel like it right away, or even longer away but you will eventually get over him.
Explanation:
I hope these tips were helpful, and if you have any more questions please ask I'm here to help you <3
3. In a chemical reaction, the final amount of the products is determined by the
A. Universal Gas Law
B. catalysts involved
C. air pressure
D. temperature
E. limiting reactant
Will mark BRAINLYEST
When you place your hand in water it appears to be larger. explain why this happens
Answer:
because the water is like a magnified glass Its on your hand and your hand apears bigger
Explanation:
Which of the following values of n makes the equation n2-159=10 true?
30. What is the final volume of a 400.0 mb gas sample that is subjected to a temperature
change from 22.0 °C to 30.0 °C and a pressure change from standard pressure to 0.47 atm?
Gas Law Used:
The calculated final volume is V2 = 410.84 mL
The unit of pressure equal to the average atmospheric pressure at sea level is known as a standard atmosphere, or atm. The SI unit of pressure is the atm, which is precisely 101,325 pascals.
Standard pressure is 1 atmosphere, or 760 mm Hg, and the standard temperature is 273 Kelvin, or 0°C. In an experiment, a mole of any gas at STP takes up 22.4 litres of space. The equation has the following form: At STP, one mole of gas is 22.4 liters of gas.
V1/T1 = V2/T2
400.0/295 /V2/303 295 x V2 = 400.0 x 303 295
V2 = 121200 /V2 = 121200/295
V2 = 410.84 mL where
T1 = 22.0°C + 273
= 295 K and
T2 = 30.0°C + 273
= 303 K
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a block has a mass of 4.465 g ad a volume of 144.2cm3 calculate the density in g/cm3
Density of given block is 0.0308 g/cm³
The measure of how densely a material is packed together is called density. As the mass per unit volume, it is defined as mass per unit Volume. Unit of density is g/cm³the cubic measurement of the area taken up by a three-dimensional object is volume.The quantity of matter that makes up a thing is referred to as its mass.unit of mass gram, kilograms etc.Given,
mass of the object is 4.465g
volume of the object is 144.2cm³
we have to find out density of object in g/cm³
we know that,
Density = mass / volume
= 4.465 / 144.2 cm³
= 0.0308 g/cm³
Therefore density of object with mass of 4.465 g and volume of 144.3cm³ is 0.0308 g/cm³.
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Match each electron configuration to the correct element. Use the periodic table to determine the number of electrons that each element has. Drag the tiles to the correct boxes to complete the pairs. Tiles [Kr] 5s2 4d10 5p2 1s2 2s2 2p6 3s2 3p5 1s2 2s2 2p6 3s2 3p6 4s2 3d10 [Ar] 4s2 3d6
[Kr]5s₂4d₁₀5p₂, 1s₂2s₂2p₆3s₂3p₅, 1s₂2s₂2p₆3s₂3p₆4s₂3d₁₀, [Ar]4s₂3d₆ are electronic configuration of tin (Sn), Chlorine (Cl), Zinc (Zn), Iron (Fe) respectively.
The distribution of electrons in an element's atomic orbitals is described by the element's electron configuration. Atomic electronic configurations are written using a standard notation that arranges all atomic subshells that contain electrons in a sequential order.Filling of atomic Orbitals are done by following principles: Aufbau principle, Pauli exclusion principle, and Hund's rule.The theory states that electrons fill up in the following order: 1s, 2s, 2p, 3s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, and 7s, 5f, 6d, 7p....[Kr]5s₂4d₁₀5p₂
Tin
Number of electrons = 50
1s₂2s₂2p₆3s₂3p₅
Chlorine
Number of electrons = 17
1s₂2s₂2p₆3s₂3p₆4s₂3d₁₀
Zinc
Number of electrons = 30
[Ar]4s₂3d₆
Iron
Number of electrons = 26
Hence, these electronic configuration are of Tin, chlorine, zinc, and Iron.
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Answer: screen shot below.
Explanation:
Which reactions performed in the experiment
involved chemical changes?
crushing calcium carbonate
mixing calcium carbonate and HCI
boiling water
heating copper (II) sulfate pentahydrate
separating iron filing and sulfur
mixing potassium iodide and lead nitrate
combining magnesium and HCI
burning the candle
DONE
Mixing calcium carbonate and HCl
Heating copper sulfate pentahydrate
Mixing potassium iodide and lead nitrate
Combining magnesium and HCl
Burning the candle.
The crushing of limestone is a bodily trade it no longer alters the chemical composition of the limestone. The heating of limestone is a chemical trade the limestone decomposes into two other materials, lime and carbon dioxide. both ended in gas formation. both ended in shade change.
Rust is not anything however Iron Oxide is a brand new substance shaped out of the response. The color of the floor of the iron additionally modifications. hence, rusting of iron is a chemical trade. Rusting is an instance of chemical exchange. A chemical property describes the ability of a substance to go through a particular chemical alternate. The chemical belonging of iron is that it is miles capable of combining with oxygen to form iron oxide, the chemical call of rust. like several steel carbonates, calcium carbonate reacts with acidic solutions to supply carbon dioxide gas.
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4521 kg into milligrams
Answer:
5421 kg = 5421000 mg
Explanation:
Hope this helps!
Answer:
4521 kg = 4521000000 milligrams
Hope this helps :)
how are physical and chemical properties of each family different?
Physical and chemical properties of each family different 'depend on valence electron'
The vertical columns on the periodic table are called groups or families because of their similar chemical behavior and all the members of a family of elements have the same number of valence electrons and similar chemical properties and isotopes of an element have same number of electron as an atom of that element but they have different number of neutron which affect the mass number and mass number determine the physical properties while atomic number determine the chemical properties
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72. A 5-mL sample of water has a mass of 5g. What is the density of water?
Answer: 1 g/ml
Explanation:
5 g / 5ml= 1 g/ml
For the reaction shown, identify the oxidation half-reaction and the reduction half-reaction. KNO3 → KNO2 + O₂ Which pair of half-reactions represents the balanced half-reactions? N5+ + 2e →N³+ 0² →0₂ + 4e 2N5+ + 4e¯ → 2N³+ 20²- → 0₂ +4e 4N5+ 2e4N³+ 20² → 20₂ + 4e¯
N5+ + 2e →N³
here Nitrogen gains electron so, its reduction half-reaction
20²- → 0₂
here oxygen loss electron so, its oxidation half-reaction
20² → 20₂ + 4e¯
here oxygen loss electron so, its oxidation half-reaction
2N5+ + 4e¯ → 2N³
here nitrogen gains electron so, its reduction half-reaction
When an atom loses electrons, it is said to be oxidising; when it acquires electrons, it is said to be reduced. A redox reaction occurs when both of these reactions take place at the same time.When a molecule oxidises, it implies it either gives or loses electrons to another molecule. As a result, the reaction between a molecule of oxygen and a molecule of hydrochloric acid may be shown below. Because it has to combine with hydrogen to create a proper molecule, the oxygen molecule in this process is unstable. Four extra hydrogen molecules are available for disposal in the hydrogen chloride molecule. Thus, although the hydrochloric acid transforms into chlorine gas, all of the hydrogen from the acid unites with the oxygen molecule to form water.To know more about oxidation visit : https://brainly.com/question/13003361
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Which subatomic particle is used to identify the atom, as it never changes?
Protons
Electrons
Neutrons
Nucleus