A scientific theory is backed up by pieces of evidence hence it is not a mere guess.
What is a scientific theory?A scientific theory is a well crafted explanation of an observed phenomenon. A scientific theory is different from a mere guess in the sense that the scientific theory must have some basis that support it.
A mere guess does not have any kind of data that supports it. Let us take the theory of evolution as an example. Countless discoveries of fossil evidences have shed some light on the probability of the theory. In this case, we can not consider it a mere guess since there is some kind of evidence that supports the claims of the theory.
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4. Food and shelter are resources animals need in order to ensure reproductive _____________.
Answer:
of animals will be safe
Explanation:
that's it
How does a lithium cation compare to a lithium atom?
The cation is larger.
The cation has the same radius.
The cation is smaller.
The cation has the same charge.
As compared to the lithium atom, the lithium cation is smaller.
The following describes the electronic structure of the lithium atom:
Li = 1s², 2s¹
While the lithium cation's electrical structure is described in the following,
Li⁺ = 1s²
Some of the causes behind the shorter length of the lithium cation relative to its parent atom.
Energy Levels DropElectronic configurations depict the valence shell of the Li atom as two whereas the Li cation's is shown to be one; as a result, the distance between the valence electrons and nucleus has decreased, leading to small size.
Less Effect of ShieldingThe valence electron is shielded from nucleus attraction by the core electrons in a process known as the shielding effect. Since a lithium cation lacks core electrons, the electrons are more pulled to the proton, which results in decrease in size.
More nuclear energyThe Li atom has three protons and three electrons; hence, three protons will draw three electrons, partly balancing the game. The proton side of the Li cation, on the other hand, strengthens and puts more force on the remaining electrons, moving them nearer to the nucleus and reducing their size, once one electron has left the Li cation.
So Li cation will be smaller than Li atom as the removal of one electron causes more nuclear energy, less effect of shielding and drop in energy levels.
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Answer: C
Explanation: on EDGE
A geologist fills three identical funnels with three different sizes of sandstone. Then, the geologist pours 500 mL of water into each funnel and measures how long it takes for the water to stop draining out of the bottom of the funnels.
A biologist cuts an African violet leaf into six equal-sized pieces. Then, the biologist carefully places the cuttings on six different petri plates, each filled with a different substance, and monitors the growth of the cuttings over the next several weeks.
A physicist places three identical glass rods in different beakers, each filled with a different liquid. Then, the physicist measures the angle of refraction in each scenario.
Which of the following statements is true based on the above information?
A.
Geologists, biologists, and physicists are only able to gather data through laboratory experiments.
B.
Variables and conditions cannot be controlled during a laboratory experiment.
C.
Laboratory experiments are a useful form of scientific investigation in many different fields of science.
D.
Physicists do not perform laboratory experiments as often as biologists and geologists.
The statements that are true from the information contained in the question is;
Geologists, biologists, and physicists are only able to gather data through laboratory experiments.
Laboratory experiments are a useful form of scientific investigation in many different fields of science.
What is an experiment?The term experiment refers to the manner in which information could be obtained. We know that we are able to arrive at new knowledge in science by conducting carefully controlled experiments. In this experiment, there must be a dependent variable as well as an independent variable.
The independent variable is the variable that we are able to manipulate in the course of the experiment while the results that we obtain when we manipulate the independent variable affects the values of the dependent variable.
Hence, the statements that are true from the information contained in the question is;
Geologists, biologists, and physicists are only able to gather data through laboratory experiments.
Laboratory experiments are a useful form of scientific investigation in many different fields of science.
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Please help me on this! Please
Observation vs Inference
An observation is based on factual information that can be found through the use of the 5 senses: touch, taste, smell, sight, hearing. An inference is a guess or conclusion that is made after something is observed.
1. The clouds mean it is going to rain today.
the clouds have been observed by sight and a guess has been made that it will rain as a result of this observation. Therefore it is an Inference.It's rainy and cold.
both of these are factual information based on the 5 senses. Rain can be seen by sight and you can feel whether something is hot or cold, Therefore it is an Observation.The grass is going to get very green after the rain.
The rain can be observed by sight but there is a guess that the grass will become very green. There was an observation and a inference made upon that observation. Therefore it is an Inference.What is the name of the person who sings or chants a solo line in the style of call and response?
A. Call Leader
B. Melody Singer
C. Solo Singer
D. Song Leader
The name of the individual who leads a solo line in a call-and-response song or chant.
The correct option is A.
What is a singing technique known as call and response?Call and response is a musical style in which one performer proposes a phrase, to which the other responds directly with a commentary or reaction. The musicians collaborate to advance the song and produce an original, group sound by building on each other's contributions and working together.
How can a call as well as a response be distinguished?In the musical form of "call and response," a melodic phrase is followed by another, usually in the form of a question as well as a response. An aural phrase is comparable to a sentence.
Which type of music is best renowned for its use of call-and-response methods?It could be vocal, instrumental, or a mix of the two. Call and response can be found in a wide range of musical styles, including rap, blues, and classical. Blues and religious music feature call and response the most frequently.
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What group is element 118 in?
*
O Alkali Metals
O Chalcogens
OPnictogens
Halogens
The group which element 118 is in noble gas group
It is a part of noble gas group.The element, No. Ununoctium, a placeholder name that in Latin reads "one-one-eight," had previously been assigned to the number 118 on the Periodic Table of Elements.In November 2016, the International Union of Pure and Applied Chemistry (IUPAC) approved the name oganesson for element 118.As of 2022, the element with the highest atomic number known is oganesson (Z = 118), which completes the seventh period (row) in the periodic table. Thus, everything in the eighth period and afterwards is totally speculative.Learn more about noble gas at:
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The industrial production of lime ( CaO ) from calcium carbonate is accomplished via the following reaction:
CaCO3(s)⇌CaO(s)+CO2(g)
Given the following data:
The reaction goes to completion at 1200 K.
What is the equilibrium constant?We know that the equilibrium constant is the value that shows us the extent to which a reactant may have been converted into products. A high and positive value of equilibrium constant shows that the the reaction moves forward to yield the products as given as shown.
Now;
If we look at the way that the information has been presented in the table that shows the complete question in the image attached to this answer, it is clear that the reaction goes to completion at 1200 K.
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An oily liquid with a cheesy, waxy odor like that of goats or other barnyard animals is caproic acid, a compound containing carbon, hydrogen, and oxygen. Combustion analysis of a 4.30-g sample of caproic acid produced 9.78 gCO2 and 4 gH2O.
Find the empirical formula for caproic acid.
The empirical formula for the caproic acid, given the combustion analysis data is C₃H₆O
We'll begin bey obtaining the mass of carbon, hydrogen and oxygen in the compound. This is illustrated below:
How to determine the mass of C
Mass of CO₂ = 9.78 gMolar mass of CO₂ = 44 g/mol Molar of C = 12 g/mol Mass of C =?Mass of C = (12 / 44) × 9.78
Mass of C = 2.67 g
How to determine the mass of H
Mass of H₂O = 20.99 gMolar mass of H₂O = 18 g/mol Molar of H = 2 × 1 = 2 g/mol Mass of H =?Mass of H = (2 / 18) × 4
Mass of H = 0.44 g
How to determine the mass of O
Mass of compound = 4.30 gMass of C = 2.67 gMass of H = 0.44 gMass of O =?Mass of O = (mass of compound) – (mass of C + mass of H)
Mass of O = 4.30 – (2.67 + 0.44)
Mass of O = 1.19 g
How to determine the empirical formulaThe empirical formula of the compound can be obtained as follow:
C = 2.67 gH = 0.44 gO = 1.19 gEmpirical formula =?Divide by their molar mass
C = 2.67 / 12 = 0.2225
H = 0.44 / 1 = 0.44
O = 1.19 / 16 = 0.074
Divide by the smallest
C = 0.2225 / 0.074 = 3
H = 0.44 / 0.0744 = 6
O = 0.074 / 0.074 = 1
Thus, the empirical formula of the compound is C₃H₆O
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The continental crust is made of?
Answer:
It is made out of granite.
Explanation:
This is because of the tectonic plates.
What is the element name for TINA
Answer:
Titanium Sodium
Explanation:
Ti is short for titanium
and NA is short for sodium
Hope this helped and have a good day
I need help solving this problem
48.98 gigagram/hr are there in 8.23x10⁶ ton/wk
What is a gigagram?
In the Metric System, a gigagram is a unit of mass. Gg is the symbol for gigagram. A gigagram has gram as its base unit and giga as its prefix.
8.23x10⁶ ton/wk equals 48.98 gigagram/hr
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Electrons can move throughout the atom.
Which terms can be used to represent where the electrons can be found?
Answer:
Energy levels, because electrons go around the center of the atom. It goes 2 and 7...
Explanation:
Homeowners have the option of building porches, decks, and fencing with composite boards or traditional wood boards. Traditional wood decking is made from pressure-treated lumber that resists rot, mold, and insects. The process of pressure treating wood also involves soaking the boards in a protective chemical solution. The wood boards still have to be sealed against moisture on a routine basis. Composite boards are made by pressing together ground wood scraps and recycled plastic, which is heated and pressure-treated and then coated with UV and stain-resistant coatings. Composite boards do not need to be sealed against moisture.
Part 1: Describe at least two advantages to using composite boards for construction projects. Assume that cost is not an issue.
Part 2: Describe how each resource does or does not impact the environment.
Composite boards can be recycled and need not be sealed against effect of moisture .Recyclable materials do not cause harm to environment as the do not leave any toxins.
How are recyclable materials beneficial to environment?Recyclable materials help in protecting the environment through the conservation of the natural resources.It helps in improving the energy efficiency as it promotes the three R's of waste management which are reduce ,reuse and recycle.
Recycling helps in reducing the amount of the waste that gets collected in the landfills.Solid waste is burnt for electricity is efficient but leads to increases amounts of carbon dioxide in the environment.
It helps in conservation of the limited resources such as oil and precious metals.Recycling helps in improving energy efficiency as it helps in reduction of energy costs.
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Is the density of an object always the same as its mass?
(A) Yes
(B) No
Answer:
yes
Explanation:
the density of a solid is the same no matter how big or small the sample
Vitamin C tablets are taken as a dietary supplement. If a typical tablet contains 400.0 mg of vitamin C, what amount (in moles) of vitamin C is contained in 11 tablets?
The correct answer is 2 × 10^21 molecules.
Vitamins A, D, E, and K are different types of vitamins that belong to the fat-soluble vitamin category. Vitamin B and C are water-soluble vitamins. Pantothenic acid, vitamin B1, vitamin B2, riboflavin, vitamin B3, niacin, vitamin B6, biotin, folic acid, and vitamin B12, often known as cobalamin, are further subgroups of vitamin B. A vitamin is a living cell that the body must have in minute amounts to function properly. Essential nutrients must be given through diet because they cannot be absorbed by the body in large amounts or at all.
C6H8O6 = (6) 12.01 g + (8) 1.008 g + (6) 16.00 g = 176.12 g
500 mg C6H8O6 × 1 gram/1000 mg × 1 mole C6H8O6/176.12 grams × 6.02 × 10^23 molecules /1 mol
= 2 × 10^21 molecules
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Which of the following best describes the element I
The one that best describes the element is that it is a material consisting of only one type of atom. The correct option is a.
What is an element?A chemical element is a type of atom with a specific number of protons in its nucleus, including the pure substance made up entirely of that species.
Chemical elements, unlike chemical compounds, cannot be broken down into simpler substances by any chemical reaction.
An atom is the smallest amount of an element. It is made up of subatomic particles such as neutrons, protons, and electrons. A given element contains only one type of atom.
Thus, the correct option is a.
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Your question seems incomplete, the missing options are:
A) a material consisting of only one type of atom
B) a material that has consistent physical properties
C) a material with more than one type of atom
D) a material that has consistent chemical properties
If 0.536 mol
of zinc reacts with excess lead(IV) sulfate, how many grams of zinc sulfate will be produced in the reaction?
mass:
0.287 g zinc sulfate will be produced in the reaction
the reaction will be
Pb (so4)2 + 2 Zn ⇄ 2znSO4 + Pb
that is 0.536 mole of zinc
that is 0.536/2
we have to find Zinc sulphate
that be 'x'
2 mole of znSO4 = 2 * molar mass of znSO4
= 2 * 0.536 g/mol. = 1.072
by putting in equation,
0.536 / 2 = x / 1.072
x = 0.287 g
Redox Reaction is a short for oxidation-reduction defined as a chemical reaction in which electrons are lost from one substance (oxidation) and added to another (reduction). oxidation and reduction always occur together. there is no net change of the number of electronsTo know more about Redox Reaction visit :
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If 32.0 grams of ammonium nitrite react to form 14.0 grams of nitrogen, how many grams of water must simultaneously be formed?
The mass of water that is formed is 20 grams of water.
What is decomposition?A decomposition reaction is one in which a substance is broken down to give its components. The decomposition would lead to the formation of the substances that were combined to obtain the decomposed substance.
From the law of conservation of mass, we know that the total mass in the system does not change. This implies that the mass of the reactants must be equal to the mass of the products.
If the mass of the ammonium nitrite is 34 grams then the mass of the water that is formed simultaneously is; 34 - 14 = 20 grams of water.
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4. Suppose you were given a length of string and an irregularly shaped piece from a jigsaw
puzzle. How would you determine the perimeter of the piece of the jigsaw puzzle?
(Perimeter is the distance around the outside edge of an object.)
The perimeter can be determined by winding the piece of string around the edges of the object and then measuring the length of the string wound around the object on a ruler.
What is the best way to determine the perimeter of the jigsaw puzzle?The perimeter of an object is the distance around the outside edge of an object.
The perimeter of objects of different regularly-shaped can be determined using the following formulas:
perimeter of a square = 2 * length of a sideperimeter of a rectangle = length * breadthperimeter of a triangle = ¹/₂ base length * heightperimeter of a circle = 2πrFor the irregularly-shaped piece from a jigsaw puzzle, the perimeter can be determined by winding the piece of string around the edges of the object and then measuring the length of the string wound around the object on a ruler.
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A 7.96 gram sample of silver reacts with oxygen to form 8.55 gram of the metal oxide. What is the formula of the oxide?
When 7.96 g of Silver (Ag) reacts with Oxygen (O) then a metal oxide is formed, the formula of the oxide is Ag₂O (Silver Oxide). Cationic Metal react with anionic oxygen to produce metal oxides.
How to calculate the empirical formula?Metal oxides are the chemical compounds formed by the reaction of oxygen and metals.
For the given metal oxide,
Mass of silver = 7.96 g
Mass of metal oxide = 8.55 g
To find out the number of moles of Ag and O in metal oxide,
Number of moles = mass/molar mass
Moles of Ag = 7.96g/107.87 g.mole⁻¹
(molecular mass of Ag = 107.87g.mole⁻¹)
Moles of Ag = 0.074 mole
Mass of oxygen is not given in the question.
To calculate the mass of oxygen
Mass of O = mass of metal oxide - mass of Ag
mass of O = 8.55 g - 7.96 g
mass of O = 0.59 g
Moles of O = 0.59 g / 16.00 g.mole⁻¹ (molecular mass of O = 16g.mole⁻¹)
Moles of O = 0.037 mol
The mole ratio can be calculated by dividing with the element with lesser number of moles
Ag : O
0.074/0.037 : 0.037/0.037
The ratio is 2:1
So, the empirical formula of the metal oxide formed by the reaction of metal with oxygen is Ag₂O.
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Convert 7.6 cm³ to m³
Divide the volume value by 1e+6. The answer should be 7.6e-6. :)
convert 650 mi to mm
Answer:
1046073600 millimeters
Answer the question about this Bohr model.
Bohr model
What does the arrow represent as an electron jumps from energy level 3 to level 1?
release of energy
release of radiation
release of alpha particles
release of electrons
(Option B). According to Bohr's model, when an electron jumps from energy level 3 to level 1 it emits radiation, so the arrow represents release of radiation.
What is energy level?Energy levels also called electron shells are fixed distances from the nucleus of an atom where electrons may be found.
What happens when electron jumps from a higher energy level to a lower energy level?
Electron can move from one energy level to another energy level. Either from higher energy level to a lower energy level or from a lower energy level to a higher energy level.
If an electron jumps from a higher to a lower energy level, energy will be lost, and the lost energy will be emitted by the atom in a bundle of electromagnetic radiation.
Thus, according to Bohr's model, when an electron jumps from energy level 3 to level 1 it emits radiation, so the arrow represents release of radiation.
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Gaseous ammonia chemically reacts with oxygen
gas to produce nitrogen monoxide gas and water vapor. Calculate the moles of ammonia needed to produce 1.60 mol of water. Be sure your answer has a unit symbol, if necessary, and round it to 3 significant digits.
The moles of ammonia that will be produced by the reaction will be 1.06 moles.
Stoichiometric problemGaseous ammonia reacts with oxygen to produce nitrogen monoxide gas and water vapor according to the following equation:
[tex]4NH_3(g)+5O_2(g)--- > 4NO(g)+6H_2O(g)[/tex]
From the balanced equation, the mole ratio of ammonia to that of water produced is 4:6 or 2:3.
In other words, for every 1 mole of ammonia that reacts, 1.5 moles of water will be produced.
The problem here is finding the moles of ammonia that will produce 1.6 moles of water.
1 mole ammonia = 1.5 moles water
Mole of ammonia that will produce 1.6 moles of water:
1 x 1.6/1.5 = 1.066667 moles
To 3 significant digits, that will be 1.06 moles of ammonia.
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How many moles of CsH12 (pentane) must be reacted according to the
following balanced chemical reaction to transfer -297.6 kJ of heat?
CsH12(1) + 8 O2(g) → 5 CO₂(g) + 6 H₂O(g)
AH-3508.8 kJ
11.79 mol of pentane (C₅H₁₂) reacted to transfer -297.6 kJ of heat.
Pentane is a 5-carbon atom straight-chain alkane with the formula C₅H₁₂. It serves as a refrigerant and a non-polar solvent. It is both an alkane and a volatile organic molecule.
Heat produced in reaction = -3508.8 kJ
Heat produced in balanced reaction = -297.6 kJ
Moles of C₅H₁₂ reacted = (Heat produced in reaction) / (Heat produced in balanced reaction)
Moles of C₅H₁₂ reacted = -3508.8/ -297.6
Moles of C₅H₁₂ reacted = 11.79 mol
Therefore, 11.79 mol of pentane (C₅H₁₂) reacted to transfer -297.6 kJ of heat.
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b. CALCULATE The specific heat of foam is about 1,200 J/(kg x K). How
much heat does it take to raise the temperature of 1 kg of foam
by 2 K?
Now, you must figure out how much heat is needed to increase the temperature of 1 kg of foam by 2 K . In this case, you know that you need 1200 J to increase its temperature by 1 K , so you can say that another 1200 J will increase its temperature by 1 K again.
Carbohydrates make up about 2% of the mass of the human body, yet we need about 1 tsp of glucose every 15 min to maintain energy for our cells.
Where does all of this glucose come from?
According to the research, the correct option is the liver. Glucose comes from the liver to maintain energy for our cells.
What is the liver?It is the largest gland in the body that fulfills metabolic (carbohydrate, lipid and protein), antitoxic and hematopoietic functions.
In this sense, it participates in the metabolism of carbohydrates, storing glucose, which is the main source of energy for cells, converting it into glycogen, transforming it into fat if it is surplus or releasing it into the blood, thus participating in the regulation of their levels.
Therefore, we can conclude that according to the research, the correct option is the liver. Glucose comes from the liver to maintain energy for our cells.
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Please help!!! Your reading assignment lists possible errors that can occur when conducting an experiment. Which of the following would be a possible error?
a) Humans making exact measurements when conducting experiments.
b) Humidity and temperature in the room may influence equipment
c) Making sure all equipment is clean and calibrated (carefully adjusted)
Answer:
The answer is B.
Explanation:
Systematic error arises from a faulty measuring device, imperfect observation methods, or an uncontrolled environment.
Answer:
your answer is a
Explanation:
What is the function of ribosomes?
(A) storage of nutrients
(B) protein synthesis
(C) photosynthesis
(D) cellular respiration
Answer: the answer is B
Answer: B
EX: Ribosomes are organelles and help produce proteins with many different functions in the body, they can be found within the cytoplasm or the endoplasmic reticulum. Where are ribosomes?
How many tires are there in 3.5 moles of cars?
The number of tires contained by 3.5 moles of cars is 10 tires.
What is number of moles?The number of moles of a substance equals the ratio of its given mass in a chemical reaction to the mass of one mole of that substance.
The number of tires contained by 3.5 moles of cars is calculated as follows;
1 moles of a car contains 4 tires
3.5 moles of cars will contain -------?
Substitute the given parameters and solve for the number of tires contained in 3.5 moles of cars.
= 3.5 moles x 4 tires/1 mole
= 14 tires
Thus, the number of tires contained by 3.5 moles of cars is 10 tires.
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