Answer: Option B
Explanation:
The plants uses sunlight to convert carbon dioxide and water into more complex carbohydrate known as glucose.
Plants utilize carbon dioxide during photosynthesis. Plants absorb water through roots and leaves.
Plants release oxygen as a by-product which is used by animals and other organism.
The carbohydrates inside the plants is broken down into simpler form and the energy released is used by plants for its cellular processes. This is known as cellular respiration.
Answer:
Plants take in carbon dioxide during photosynthesis and absorb water through their leaves and roots.
An asteroid hit the Yucatán Peninsula about 65 million years ago,
filling the atmosphere with debris. How could this event have
contributed to the extinction of dinosaurs?
O
A. It sucked up all the carbon.
O
O
O
B. It caused Earth to overheat.
C. It blocked out sunlight.
D. It made it difficult to breathe.
Answer:
C. It blocked out sunlight
Explanation:
The asteroid impact 65 million years ago was devastating for lot of the animals and plants, resulting in a mass extinction, most noticeably of the dinosaurs. The impact itself killed a lot of flora and fauna, but it was the effect afterward that was crucial. From this impact, there was so much debris propelled into the atmosphere that the sunlight got blocked. Once this happened, most of the plants died out as they were not able to perform photosynthesis. Because the plants were dying out, the herbivores were left without food, so soon they followed, and because the herbivores died out, the predators died out to because they were left without food. The winners turned out to be the small and not specialized plants and animals.
Final answer:
The asteroid impact in the Yucatán Peninsula caused debris to C. block sunlight, disrupt photosynthesis, and lead to a steep drop in food availability and global temperatures, contributing significantly to the mass extinction of dinosaurs and altering the course of life on Earth.
Explanation:
The asteroid impact that occurred around 65 million years ago in the Yucatán Peninsula is associated with the extinction of dinosaurs. Following the collision, numerous environmental changes unfolded, which were detrimental to the dinosaurs and other species. One of the primary effects of the asteroid impact was the ejection of a vast amount of debris into the atmosphere. This debris included dust and particles that formed a thick cloud around the Earth, blocking sunlight and significantly reducing the amount of solar radiation reaching the surface of the planet.
With the blockage of sunlight, a catastrophic chain of events was set in motion. Photosynthesis, the process by which plants convert light energy into chemical energy, was severely disrupted. As a result, many plant species perished, leading to a dramatic decline in the food supply for herbivorous dinosaurs. Inevitable consequences ensued for the entire food chain, affecting both plant-eating and meat-eating dinosaurs.
A student takes a measured volume of 3.00 M HCl to prepare a 50.0 mL sample of 1.80 M HCL. What volume of 3.00 M HCI
did the student use to make the sample?
Use MV - MV
Sos
3.70 ml
16.7 ml
300 ml
83.3 ml
M
andum
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Submit
To solve the question you use the following formula:
concentration (1) × volume (1) = concentration (1) × volume (1)
3 M × volume (1) = 1.8 M × 50 mL
volume (1) = (1.8 M × 50 mL) / 3 M = 30 mL
Answer:
30.0 ml
Explanation:
1.8 M means 1.8 moles of HCl in 1 liter (or 1000 ml) of solution.
50 ml of solution has:
1.8 moles/(x moles) = 1000 ml/(50 ml)
x = 1.8 moles/(1000 ml) * 50 ml = 0.09 moles
3 M means 3 moles of HCl in 1 liter of solution.
0.09 moles are found in:
3 moles/(0.09 moles) = 1000 ml/(x ml)
x = 0.09 moles * 1000 ml/(3 moles) = 30 ml
Then, you have to take a sample of 30 ml of a solution 3 M and add 20 ml of the solvent (probably water) to make 50 ml of solution 1.8 M of HCl.
The six pollutants regulated under the Clear Air Act _____ between 1970 and 2001, while energy consumption increased 42 percent.
increased only 6 percent
decreased 39 percent
decreased 24 percent
remained stable
Answer:
increased only 6 percent
Explanation:
The six pollutants regulated under the Clear Air Act increased only 6 percent between 1970 and 2001, while energy consumption increased 42 percent.
Answer:Explained
Explanation:
The six pollutants regulated under the clear air act are
leadPMSulfur dioxidecarbon monoxidenitrogen oxidesozoneClear air act is the first and most comprehensive air quality control law and is under U.S. Environmental Protection agency.
A study of 2017 shows it causes a reduction of 10% in pollution within 3 years of implementation.
What coefficients balance the equation: NH3 + H2O + NH4OH
PLEASE HELP
Dont know how well educated you are on this topic, This is the right answer, But sorry if you dont understand it
NH3+H2O | NH4OH
____________________
N=1 | N=1
H=3+2=5 | H=4+1=5
O=1 | O=1
Hope this helped you and good luck :)
Hit me up if you need anymore help :))))
According to the kinetic-molecular theory, the average kinetic energy of gas
s depends on which factor?
volume
pressure
temperature
number of particles
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Answer:
The average kinetic energy of a gas depends only on its temperature.
Explanation:
The average kinetic energy of particles in a gas can be found using the equation
[tex]\displaystyle \text{Average K.E.} = \frac{3}{2}k\cdot T[/tex],
where
[tex]k[/tex] is the Stefan-Boltzmann constant, and[tex]T[/tex] is the absolute temperature of this gas (the one in degree Kelvins.)As seen in this equation, the average kinetic energy of particles in a gas depends only on the temperature of the gas. Also, since the question is asking for the average not the total kinetic energy, the number of particles in this gas doesn't matter, either.
Answer:
The answer is temperature. Edge 2020
Explanation:
Force 1: The squeezing force applied to remove water from a wet cloth Force 2: The gravitational force exerted by Earth on the moon Which statement is true about the forces? (3 points) Question 5 options: 1) Both are contact forces. 2) Both are non-contact forces. 3) Force 1 is a contact force and Force 2 is a non-contact force. 4) Force 1 is a non-contact force and Force 2 is a contact force.
Answer:
3) Force 1 is a contact force and Force 2 is a non-contact force.
Explanation:
Force is a phenomenon that causes a change in phsical quantity. It is expressed as the product of mass and acceleration.
Contact force is a type force that involves physical contact between two bodies or more. An example is the pulling of a cart. Also, when the wet clothe is being squeeze, a physical contact is established.
Non-contact force occurs between bodies in which there is no physical contact. An example is gravitational force of attraction between two bodies.
Is hardness directly related to surface roughness, strength of chemical bonds, mass, or weight?
Answer:
Hardness in science refers to the resistance of a material to deformation, indentation, or penetration by means such as abrasion, drilling, impact, scratching, and/or wear, measured by hardness tests such as Brinell, Knoop, Rockwell, or Vickers.
Explanation:
The definition of hardness is the quality or condition of being hard. The cohesion of the particles on the surface of a mineral as determined by its capacity to scratch another or be itself scratched. the Resistance of metal to indentation under a static load or to scratching.
Answer:
Strength of chemical bonds
Explanation:
Why did Bromophenal solutions change from yellow to blue(what chemical reaction happended)?
Final answer:
Bromophenol blue changes from yellow to blue due to a chemical reaction happening when the pH of the solution is altered.
Explanation:
The color change from yellow to blue in bromophenol solutions is due to a chemical reaction. Bromophenol blue is an indicator that undergoes a color change depending on the pH of the solution it is in. In acidic conditions, the bromophenol solution appears yellow, while in basic conditions, it turns blue.
This color change occurs because the bromophenol blue molecule has different forms, or species, depending on the pH. In an acidic solution, the molecule is in its yellow form, which absorbs light in the visible spectrum and gives the solution its yellow color. In a basic solution, the molecule converts to its blue form, which also absorbs light in the visible spectrum but at a different wavelength, resulting in a blue color.
What is the empirical formula of C6H12O6?
Answer:
C6H12O6 is the molecular formula, which can either be equivalent to the empirical formula or an integer n multiple of the empirical formula. In this case, n is equal to 6. The empirical formula of glucose C6H12O6 is CH2O . It indicates that the ratio of C,HandO atoms in a molecule of glucose is 1:2:1.
Explanation:
The empirical formula of C₆H₁₂O₆ is CH₂O.
The empirical formula represents the simplest whole-number ratio of atoms in a compound.
To determine the empirical formula of C₆H₁₂O₆, find the lowest whole number ratio of carbon (C), hydrogen (H), and oxygen (O) atoms.
To simplify the ratio, divide each subscript by the greatest common divisor (GCD) of all the subscripts.
The GCD of 6, 12, and 6 is 6. Dividing each subscript by 6, we get:
C₆H₁₂O₆ ⇒ (6/6)C (12/6)H (6/6)O ⇒ C₁H₂O₁
Therefore, the empirical formula of C₆H₁₂O₆ is CH₂O.
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Four (4.0) liters of helium gas are stored at 125 atm pressure. If the temperature and number of particles do not change, what will be the new volume when the pressure is decreased to 50 atm? Show your work.
Please answer ASAP!!
Answer:
10 L
Explanation:
The only variables are pressure and volume, so we can use Boyle's Law:
p1V1 = p2V2
Data:
p1 = 125 atm; V1 = 4.0 L
p2 = 50 atm; V2 = ?
Calculation:
125 × 4.0 = 50V2
500 = 50 V2
V2 = 500/50 = 10 L
The new volume will be 10 L.
A sample of potassium is composed of 23% K-39, 48% K-40 and the remainder K-41. Calculate the average mass
of the sample.
Answer:
[tex]\boxed{\text{40 u}}[/tex]
Explanation:
The atomic mass is the weighted average of the atomic masses of each isotope.
In a weighted average, we multiply each value by a number representing its relative importance.
In this problem, the percent abundance represents the relative importance of each isotope.
Data:
K-39 = 23 %
K-40 = 48 %
Calculations:
(a) Calculate % K-41
K-41 = 100 - 23 - 48 = 29 %
(b) Calculate atomic mass of sample
[tex]\begin{array}{cccc}\\\textbf{Isotope} & \textbf{Mass/u} & \textbf{Abundance} & \textbf{Contribution/u}\\\text{K-39} & 39.0 & 0.23 & 9.0\\\text{K-40} & 40.0 & 0.48 & 19.2\\\text{K-41} & 41.0 & 0.29 & 11.9\\ & \text{TOTAL} & = & 40.0\\\end{array}\\\text{The average atomic mass of the sample is }\boxed{\textbf{40 u}}[/tex]
Final answer:
The average mass of the sample can be calculated by considering the abundance of each isotope of potassium and their respective masses. The average mass of the sample is 100 grams.
Explanation:
The average mass of the sample can be calculated by considering the abundance of each isotope of potassium and their respective masses. Here's how:
Convert the percentages of each isotope to fractions by dividing them by 100.
Multiply each fraction by the atomic mass of the corresponding isotope.
Add up the products to get the average mass.
For example, if we have 100 grams of the sample:
23% of K-39 corresponds to 23 grams of K-39.
48% of K-40 corresponds to 48 grams of K-40.
The remaining 29% of K-41 corresponds to 29 grams of K-41.
Adding up the masses, we get: 23 + 48 + 29 = 100 grams. Therefore, the average mass of the sample is 100 grams.
The bonds in the reactants of a chemical reaction store 710 kj of potential energy.The bonds in the products of the reaction store 641 kj of potential energy. Is the reaction endothermic or exothermic? explain please
Answer:
Exothermic
Explanation:
Well as we can, see the energy decreases when it changes from reactant to product.
Endothermic reactions involve the absorption of energy from the surroundings (meaning there would be in an increase in energy)
Exothermic reactions involve the energy being released into the surroundings (meaning there would be a lost in energy)
Therefore, the reaction is exothermic.
A penny has a total mass of 3.1 grams. Zinc makes up 2.9 g of the penny. What is the percentage of zinc in the penny?
Answer: 93.54%
Explanation: Divide the mass of the zinc by the total mass of the penny.
2.9/3.1=0.9354
To get to a percent, multiply by 100.
0.9354 x 100 = 93.54
The mass of the zinc in the penny is 93.54%.
93.54% of zinc in the penny when a penny has a total mass of 3.1 grams and zinc makes up 2.9 g of the penny.
What is mass?Mass is simply the measure of the amount of matter in a body.
Divide the mass of the zinc by the total mass of the penny.
[tex]\frac{Mass \;of \;zinc}{Total \;mass}[/tex]
[tex]\frac{2.9}{3.1}[/tex]
=0.9354
To get to a percent, multiply by 100.
0.9354 x 100 = 93.54
Thus, the mass of the zinc in the penny is 93.54%.
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Can you explain and read this equation 2Mg + 02 —— 2MgO
Answer:
Here's what I get
Explanation:
There are several ways to read your equation.
2Mg + O₂ ⟶ 2MgO
Magnesium reacts with oxygen to form magnesium oxide Two atoms of magnesium react with one molecule of oxygen to form one formula unit of magnesium oxide. Two moles of magnesium react with one mole of oxygen to form one mole of magnesium oxide.What information does the activity series of metals give?
A. It predicts if one metal will replace another metal in a compound.
B. It identifies which metals have the highest electronegativities.
C. It gives the ionic charges of most metals on the periodic table.
D. It tells which metals will react with nonmetals to form compounds.
Answer:
The answer is A.It predicts if one metal will replace another metal in a compound.
Explanation:
I did quiz.
The activity series of metals predicts if one metal will replace another metal in a compound.
Hence, Option (A) is correct answer.
What is Metal ?Metals are good conductor of heat. It have high density. Metals are ductile. Metals are malleable.
What is Reactivity series of metal ?Reactivity series of metals is also called the activity series of metals. Reactivity series of metal includes oxidation reaction of each metal to the metal ion. It gives the information about the reaction of metals with water and acids. Reactivity series can be used to predict whether the metal will replace another metal in the compound.
Thus from the above conclusion we can say that The activity series of metals predicts if one metal will replace another metal in a compound.
Hence, Option (A) is correct answer.
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A __________ is a natural or human-made body of water surrounded by land.
dune
glacier
hill
lake
Answer:
Lake
Explanation:
Yeah...not much else to say honestly
Answer:
Lake is the answer :))
Which of the following methods can be used to obtain sodium chloride from a solid mixture containing sodium chloride and ammonium chloride?
A. heating
B. adding water and filtering
C. adding sodium hydroxide solution and filtering
D. adding silver nitrate solution and filtering
Answer:
option A. heating.Explanation:
The tables proportionate you physical properties, such as boiling points and solubilities of both sodium chloride and ammonium chloride.
Both substances are highly soluble in water, so they cannot be separated by adding water and filtering, because both will be dissolved.
The boiling point of sodium chloride is 1465°C while the boiling point of ammonium chloride is 520°C. That means that if you heat the mixture up to 520°C (a little bit higher may be) the ammonium chloride will become a gas while the sodium chloride will remain liquid. This way you will obtain all the sodium chloride from the mixture.
Adding sodium hydroxide solution and filtering (option c.) and silver nitrate solution and filtering (option d) are not good methods to separate the sodium chloride as chemical reactions will change the sodium chloride into other substances.
How many iron atoms are in 5.4 mol of Fe203?
Answer:
6.5×10²⁴ atoms Fe
Explanation:
First find moles of iron:
5.4 mol Fe₂O₃ × (2 mol Fe / mol Fe₂O₃) = 10.8 mol Fe
Now calculate atoms of iron:
10.8 mol Fe × (6.02×10²³ atoms Fe / mol Fe) = 6.5×10²⁴ atoms Fe
Can you describe the situations when Greek prefixes are used?
Answer:
Here's what I get
Explanation:
At the introductory level of chemistry, I can think of only two situations when you use Greek prefixes.
They indicate the number of atoms or groups in a molecule when you are naming a compound.
1. Binary covalent compounds
For example, P₂S₅ is diphosphorus pentasulfide.
2. Hydrates
For example, Na₂SO₄·10H₂O is sodium sulfate decahydrate.
The Greek prefixes are used in naming different compounds such as binary compounds, complexes, hydrates of inorganic molecules, organic molecules, etc.
Explanation:
The Greek prefixes are used in naming different compounds. They are used to convey the number of atoms of elements present in the compound's molecule.For example: mono-(1), di-(2), tri-(3), tetra-(4), etcIn naming hydrates of ionic compounds.In naming binary compounds In the naming of organic molecules to convey the number of carbon atoms in the molecules.In the naming of complexes formed by the transition elementsLearn more about the use of greek prefixes in the naming of compounds here:
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What is the name of solution who’s classification of salute is equal to the maximum concentration
Answer:
Saturated solution.
Hope this helps!
Answer:
saturated
Explanation:
oh i love xxxtentacion
How many eggs are present in one mole of eggs?
Answer:
602000000000000000000000
Explanation:
There are 602000000000000000000000 eggs present in one mole of eggs.
Answer:
6.02 x10^23 eggs
Explanation:
Since 1 mole is 6.02 x10^23, this would result in 6.02 x10^23 eggs.
Which of the following is a base?
O
A. HNO3 (nitric acid)
O
B. HI (hydroiodic acid)
O
C. H2CO3 (carbonic acid)
O
D. Ca(OH)2 (calcium hydroxide)
Answer:
Ca (oh)2 (calcium hydroxide)
Explanation:
a.p.e.x
Ca(OH)2 (calcium hydroxide) is a base.
Is Ca acidic or basic?
Calcium, strontium, barium, and radium are always considered to be alkaline earth metals; the lighter beryllium and magnesium, also in group 2 of the periodic table, are often included as well.
Is calcium hydroxide a strong or weak base?Calcium hydroxide is a strong base. Since it produces OH- ions on electrolyte dissociation.
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how does the goverment control scientific reseach
Answer:
science is nothing without funding
Explanation:
Well Science in the US is highly a political affair. Scientists need funding for research, so they usually have to obtain grants from people who have the means to spare it. In many cases that means people who are involved with the government, or have close ties to it.
So scientists find themselves having to play off partisan politics in order to secure the funding they need for their research. Many times they also find that their research will inevitably get skewn to meet the original funders own ends.
Mostly what I have said is commonly known. However I am in school, and deal with scientists and doctoral researchers who have expressed and validated similar experiences.
A container of carbon dioxide (CO2) has an initial temperature of 170 K with a pressure of 50 kPa. When the container is heated the pressure is measured at 283 kPa. The volume is constant at 12 L throughout. What is the final temperature of the carbon dioxide (CO2)?
A. 391.0 K
B. 1179.16 K
C. 6.94 K
D. 962.2 K
Answer:
[tex]\boxed{\text{D. 962 K}}[/tex]
Explanation:
The volume and number of moles are constant, so we can use Gay-Lussac’s Law:
At constant volume, the pressure exerted by a gas is directly proportional to its temperature.
[tex]\dfrac{p_{1}}{T_{1}} = \dfrac{p_{2}}{T_{2}}[/tex]
Data:
p₁ = 50 KPa; T₁ = 170 K
p₂ = 283 KPa; T₂ = ?
Calculations:
[tex]\begin{array}{rcl}\dfrac{50}{170} & = & \dfrac{283}{T_{2}}\\\\0.294 & = & \dfrac{283}{T_{2}}\\\\0.294T_{2} & = & 283\\\\T_{2} & = &\dfrac{283}{0.294}\\\\ & = &\textbf{962 K}\\\end{array}\\\text{The final temperature of the carbon dioxide is }\boxed{\textbf{962 K}}[/tex]
how many atoms of sulfur are in 1.00 mol of iron(II) sulfate, FeSO4 ?
Answer:
[tex]\boxed{\math{6.02 \times 10^{23}} \text{ atoms of S }}[/tex]
Explanation:
1. Calculate the formula units of FeSO₄
There are 6.023 × 10²³ formula units in 1 mol of FeSO₄
[tex]\text{No. of formula units} = \text{1.00 mol FeSO}_{4} \times \dfrac{6.022\times 10^{23} \text{ units FeSO}_{4}}{\text{1 mol FeSO}_{4}}\\\\= 6.02\times 10^{23}\text{ formula units FeSO}_{4}[/tex]
2. Calculate the atoms of S
[tex]\text{No. of atoms} = 6.02 \times10^{23}\text {units FeSO}_{4} \times \dfrac{\text{1 atom S}}{\text{1 unit FeSO}_{4}}\\\\= \mathbf{6.02 \times 10^{23}} \textbf{ atoms S}\\\\\text{There are }\boxed{\mathbf{6.02 \times 10^{23}} \textbf{ atoms of S }} \text{ in 1.00 mol of FeSO}_{4}[/tex]
which of the following qualities is NOT typical of metals?
They are malleable
They conduct electricity
They form negative ions
They are solids at room temperature
They form negative ions.
What is called metal?Metal is any of a class of substances characterized by high electrical and thermal conductivity as well as by malleability, ductility, and high reflectivity of light.
What is a metal made of?Metals are minerals like iron or lead that are found underground in rocks. These are separated from the rocks using heat. Metals are very useful materials.
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The levels of nitrogen and _______ in the atmosphere remain fairly constant, but the levels of the other gases may vary. _______, such as carbon dioxide and water vapor, are known to trap heat in Earth's atmosphere. Particles of solids and liquids floating in the atmosphere are known as _______. The upper boundary of the troposphere is called the _______. Ozone gas heats the stratosphere by absorbing _______ rays from the Sun. The International Space Station (ISS) orbits Earth in the _______. In the atmosphere, the _______ has no upper boundary and just fades into space. When you place your hand near a candle flame, your hand will get warm due to _______. If you place one end of a metal rod in a fire, the other end will eventually get hot due to _______. Boiling water on the stove is an example of the transfer of thermal energy via _______.
Answer:
oxygen
Greenhouse gases
aerosols
tropopause
ultraviolet
thermosphere
exosphere
radiation
conduction
convection
Answer:
oxygen
Greenhouse gases
aerosols
tropopause
ultraviolet
thermosphere
exosphere
radiation
conduction
convection
Explanation:
what is the molarity of NaOH solution of 112 g of NaOH dissolved in 0.750 L of solvent
Answer:
0.373M
Explanation:
Given parameters:
Mass of NaOH given = 112g
Volume of solvent = 0.75L
Solution:
1....To solve this problem, we first find the number of moles of the solute using the expression below:
Number of moles = mass/molar mass
Solving:
Molar mass of NaOH
Atomic mass of Na = 23g
Atomic mass of O = 16g
Atomic mass of H = 1g
Molar mass = 23 + 16 + 1 = 40g/mol
Number of moles = 112/40 = 2.8mol
2..... From the number of moles of solute, we then evaluate the molarity of the solution that would be produced using the expression below:
Molarity = number of moles/Volume
Molarity = 2.8/0.75 = 0.373M
Answer : The molarity of NaOH is, 3.733 mole/L
Explanation : Given,
Mass of NaOH = 112 g
Molar mass of NaOH = 40 g/mole
Volume of solution = 0.750 L
Molarity : It is defined as the number of moles of solute present in one liter of solution.
In this question, the solute is NaOH.
Formula used :
[tex]Molarity=\frac{w_b}{M_b\times V}[/tex]
where,
[tex]w_b[/tex] = mass of solute NaOH = 112 g
[tex]M_b[/tex] = molar mass of solute NaOH = 40 g/mole
V = volume of solution = 0.750 L
Now put all the given values in the above formula, we get the molarity of the solution.
[tex]Molarity=\frac{112g}{40g/mole\times 0.750L}=3.733mole/L[/tex]
Therefore, the molarity of NaOH is, 3.733 mole/L
do respiration in cells releases energy or absorbs energy
Energy is released during the reaction and is captured by the energy-carrying molecule ATP (adenosine triphosphate).
In the equation 4 Si2H3 + 11 O2 → 8 SiO2 + 6 H2O , what would be the product(s)?
a H2O
b SiO2
c both
d neither
Answer:
Option-C (Both)
Explanation:
Chemical equation is the representation of a chemical reaction in the form of elemental symbols and molecular formulae.
Parts of Chemical equation are as follow:
a) Left Part:
The left part of the chemical equation shows the Reactants. Reactants are the starting material of a chemical equation which reacts together to form a final product(s).
In given equation Si₂H₃ and O₂ are the reactants.
b) Right Part:
The right part of the chemical equation shows the Products. Products are the substances formed due to the reaction of reactants.
In given equation SiO₂ and H₂O are the products.
c) Coefficient:
It is the number placed infront of a molecule or atom in a chemical equation. It specifies the number of molecules or atoms.
In given equation the number 4 infront of Si₂H₃ implies that there are 4 molecules of Si₂H₃.
d) Subscript:
It is the number placed after an atom in a molecule. It specifies the number of that particular atom in molecule.
In given equation the the number 2 after Si and number 3 after H implies that there are 2 atoms of Si and 3 atoms of H in one molecule of Si₂H₃ respectively.
Answer:
C. both
Explanation: