Which of the following would not be a reason to create a controlled-fusion reactor? A. To start and control a fusion reaction B. To eliminate radioactive waste materials C. To confine a fission reaction D. To utilize resources already available to us
your answer is C. To confine a fission reaction
i just took the test
What is plate tectonics
Answer:
Plate tectonics refers to the plate tectonic theory. According to this theory, the earth's lithosphere is divided into many parts which are commonly known as plates. These are of two types, the continental and the oceanic crust (plate). These plates move over the less dense layer of the asthenosphere from one place to another due to the creation of convection current in the layer of the mantle. This type of current forms because of the heat energy provided from the extreme internal part of the earth. This theory was simple and universally accepted and replaced the theory of continental drift discovered by Alfred Wegener.
What is a committee called that is organized whenever the two house of congress diffrent versions of the same bill?
An unknown compound contains only carbon, hydrogen, and oxygen (CxHyOz). Combustion of 2.50g of this compound produced 3.67g of carbon dioxide and 1.50g of water.
How many moles of carbon, C, were in the original sample?
Final answer:
To find the moles of carbon in the original unknown compound, we use the mass of the carbon dioxide produced from combustion, and divide by its molar mass. This gives us the moles of carbon dioxide, which are equivalent to the moles of carbon in the sample, resulting in 0.0834 mol of carbon.
Explanation:
To determine how many moles of carbon, C, were in the original 2.50g sample of an unknown compound after combustion, we need to use the mass of carbon dioxide (CO2) produced. Every mole of CO2 contains one mole of C, so the moles of C are equal to the moles of CO2.
First, calculate the moles of CO2 using its molar mass:
Moles of CO2 = mass of CO2 / molar mass of CO2
Molar mass of CO2 is approximately 44.01 g/mol
Moles of CO2 = 3.67 g / 44.01 g/mol = 0.0834 mol
Since each mole of CO2 represents one mole of carbon, the moles of carbon in the original compound is also 0.0834 mol.
how many electrons are in the highest occupied energy level of these atoms?
a. barium
b. sodium
c. aluminum
d. oxygen
Barium: 2 electrons, Sodium: 1 electron, Aluminum: 3 electrons, Oxygen: 6 electrons
Explanation:The number of electrons in the highest occupied energy level can be determined by looking at the electron configuration of each element. For barium (Ba), the electron configuration is 2-8-18-18-8-2, so there are 2 electrons in the highest occupied energy level. Sodium (Na) has an electron configuration of 2-8-1, so there is 1 electron in the highest occupied energy level. Aluminum (Al) has an electron configuration of 2-8-3, so there are 3 electrons in the highest occupied energy level. Oxygen (O) has an electron configuration of 2-6, so there are 6 electrons in the highest occupied energy level.
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why does ice float?
a.of cohesion.
b.ice has a higher density than water.
c.water shrinks when it freezes.
d.water expands when it freezes.
Henry plans to monitor the change in concentration of an acid during a chemical reaction. He wants to collect data every 0.1 seconds and then to graph his data and insert it into a text document. Which pair of tools would be best for Henry to use?
a computer and pH paper
pH paper and a graphing calculator
a computer and a concentration probe
a graphing calculator and a concentration probe
A computer and a concentration probe
Based on this equation: 2AL + 3CuCl2 -> 2AlCl3 + Cu ... how many grams of copper(II) chloride dihydrate would be required to react completely with 1.20g of aluminum metal?
Which of these elements is a transition metal? francium (Fr) beryllium (Be) chromium (Cr) gallium (Ga) bismuth (Bi)
Answer:
chromium (Cr)
Explanation:
Final answer:
Chromium (Cr) is the transition metal among the listed elements. It falls under the first transition series in the d-block of groups 3-12 on the periodic table.
Explanation:
Among the listed elements, chromium (Cr) is a transition metal. Transition metals fall within groups 3-12 on the periodic table and include the d-block elements, which are typically divided into four transition series. Chromium is part of the first transition series.
Other elements listed such as francium (Fr), beryllium (Be), gallium (Ga), and bismuth (Bi) are not considered transition metals. Francium is an alkali metal, beryllium is an alkaline earth metal, gallium is a post-transition metal, and bismuth is considered a metalloid or post-transition metal, but not a transition metal.
All matter has mass and takes up space.
True
False
Brad is testing three solutions with litmus paper. after dipping the litmus paper strips in the solutions, he observes two papers turning blue and one turning red. out of the three solutions, how many are acidic? one two three
How is the evidence from a fire scene collected? What should be avoided?
Answer:
Explanation:
In fire and arson cases evidences like volatile fuel in the sediment debris can be collected. The debris should be collected in an air-tight container like tin or paint box and bottles so as to prevent the evaporation of the fuel. The type of fuel used for setting up the fire is an important evidence.
Plastic bags should not be used because the plastic can react with the fuel components and may react with the fuel components in debris and the evidence will become futile.
In the reaction MgCl2 + 2KOH Mg(OH)2 + 2KCl, if 6 moles MgCl2 are added to 6 moles KOH, which is the limiting reagent?
Answer: KOH
Explanation:I JUST TOOK IT
Sort these elements into pairs that would most likely exhibit similar chemical properties.
Te,K,Kr,Li,Ne,S
The following pairs of elements would most likely exhibit similar properties:
Tellurium (Te) and Sulfur (S)Potassium (K) and Lithium (Li)Neon (Ne) and Krypton (Kr)Further ExplanationThe chemical properties and behavior of elements are determined by the their valence electrons. Elements with the same number of valence electrons will exhibit similar chemical properties.
The number of valence electrons can be determined easily from the periodic table. In the periodic table the elements are arranged in columns and rows. Columns are called the groups and the rows are the periods. From left to right, each group is numbered from 1 to 18. The group number gives information about number of valence electrons of the element:
Group 1 - 1 valence electronGroup 2 - 2 valence electronsGroup 13 - 3 valence electronsGroup 14 - 4 valence electronsGroup 15 - 5 valence electronsGroup 16 - 6 valence electronsGroup 17 - 7 valence electronsGroup 18 - 8 valence electronsElements that belong to the same group have similar chemical properties.
Potassium and Lithium are both Group 1 element and have one valence electron. They are both very reactive with water. They form an alkaline solution with water.
Neon and Krypton are both Group 18 or Noble Gases. Both elements have filled valence shells with eight electrons and are very stable and quite unreactive.
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What compound name belongs in box(1) in Figure 3? What type of bond belongs in box (3) in Figure 3?
Answer:
Box 1 = Sodium Chloride
Box 3 = Covalent Bond
Explanation:
Naming NaCl:
Ionic compounds are named as;
i) The positive specie is named first.
ii) The negative specie is named after.
Example: In NaCl, Sodium is the positive cation i.e. Na⁺ hence, it is named first followed by the name of negative anion which is Cl⁻ (chloride). Therefore, the name given to NaCl is Sodium Chloride.
Covalent Bond:
This type of bond is formed between atoms by mutually sharing their valence electrons. The type of bond depends upon the electronegativity difference between the atoms. If the electronegativeity difference is greater than the bond will be polar covalent bond or if the difference is small than the bond will be non polar colvalent bond.
if you double the mass of an object what happen to the acceleration?
What is another name for the representative elements?
a. group a elements
b. group b elements
c. group c elements
d. transition elements
Representative elements are also known as Group A elements and cover a wide range of properties in the periodic table. They do not include the transition elements, which are referred to as Group B elements.
Explanation:The representative elements in the periodic table are also known as the Group A elements. These elements include Groups 1A through 8A, excluding the transition metals, which are the Group B elements. The representative elements are so named because they exhibit a wide range of physical and chemical properties, representing almost all possibilities. In contrast, Group B elements or the transition elements, have their own unique properties different from representative elements.
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a 1.00 degree increased on the celsius scale is equivalent to a 1.80 degree increased on the fahrenheit scale. if a temperance increased by 48.0 C, what is the corresponding temperature increased on the faherheit scale
When a given reaction is conducted in a calorimeter, energy is absorbed from the surrounding water that results in a decrease in the water’s temperature. Which of the following potential energy diagrams best illustrates the energy change of this dissolving process?
Answer: Option (a) is the correct answer.
Explanation:
Since, it is given that energy is absorbed by the water molecules resulting in a decrease in water's temperature, that is, there will also be a decrease in the energy of molecules.
As a result, molecules will come closer to each other. This means that the diagram (a) best illustrates the energy change of this dissolving process.
Answer:
A.
Explanation:
The energy is absorbed by the water, it means that the system is losing heat, so, the difference of energy must be negative, the initial energy must be higher than the final energy.
For the reaction happens, the reactants must gain energy to overtake the activation energy, and for that, the reaction can occur.
Only letter A represents a system that the final energy is higher than the initial, and the system gains energy at the beginning.
Crude oil is a mixture of many liquids. The crude oil enters the bottom of a tall column, where the mixture is heated. The substances rise up the column until they cool down and condense back to liquids.
The components of crude oil can be separated because of differences in which property?
A/density
B/magnetism
C/boiling point
D/physical state
Answer:
C/boiling point
Explanation:
Fractional distillation is a process that is often employed to separate various liquids from a mixture of liquids based on the respective boiling points. As the liquid mixture is heated, the component with the lowest boiling point will vaporize first and can be separated out through a condenser.
Crude oil is a mixture of several volatile hydrocarbons each having a different boiling point. Therefore, the difference in boiling point can be used to separate them through the method of fractional distillation
The components of crude oil are separated by their boiling points during the process of large-scale fractional distillation, where each substance condenses at different levels of the fractionating column.
The components of crude oil can be separated in a refinery using a process called large-scale fractional distillation. The property that allows this separation is the different boiling points of the substances contained in crude oil. When the crude oil is heated in a fractionating column, its components vaporize at different temperatures due to their various boiling points. The vapor rises through the column until it reaches a level where the temperature is low enough for it to condense back into a liquid. The components with higher boiling points condense near the bottom of the column, where the temperature is higher, while those with lower boiling points condense higher up where the temperature is cooler.
This process results in the collection of simpler mixtures of hydrocarbons and other petroleum compounds at different levels of the column. These collected liquids are then used for various applications, such as diesel fuel, kerosene, and gasoline. Boiling point differences are essential for this separation technique, making it the correct answer (C) to the question. Density, magnetism, and physical state do not serve as the primary basis for separation in this context.
The ways in which electrons are arranged around the nuclei of atoms are called
A 24-gram sample of a radioactive nuclide decayed to 3.0 grams of the nuclide in 36 minutes. How much of the original nuclide sample remained after the first 12 minutes?
The elements that do not ordinarily form compounds are
a.
elements in the carbon family.
b.
metals.
c.
halogens.
d.
noble gases.
Describe a situation where scientific knowledge was gained through doing an experiment
Answer:
When determining the types of chemical reactions.
Explanation:
Hello,
In this case, in order to establish the different types of chemical reactions, several experiments are carried out the determine whether a chemical reaction is synthesis, decomposition, double displacement, double displacement or combustion. Such experiments consist on the combination of different of reactants under varied conditions in order the appreciate the reaction behavior over the time, changes in color, temperature changes and formed products that suggest the type of reaction.
Once the observations are set throughout the experiments, one provides the scientific knowledge that in this case will help to differentiate such types of chemical reactions.
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why does copper ii chloride not conduct electricity as a solid, but does conduct electricity when dissolved in distilled water
Renewable fuels derived from biological matter are called:
A: alternative energy
B: challenges to green design
C: fossil fuels
D: biofuels
Answer: Renewable fuels derived from biological matter are called biofuels.
Explanation:
Bio fuels are the fuels which are derived from plants, algae or from the waste of animals. Unlike fossil fuels they are produced from renewable resources which can be replenished again and again.
For example; ethanol from corns and sugarcane, green diesel from algae etc.
identify the isotope that has atoms with 12 neutrons, 10 protons and 10 electrons
The noble gases include Helium, Neon, Argon, Krypton, Xenon, and Radon. What property do these elements share? ...?
Answer:
They are normally unreactive with other elements.
Explanation:
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which best describes an element
I am unsure if this is correct (especially since I'm very late), but here are the possible answer choices to this question:
O a pure substance
O a type of a mixture
O a pure compound
O an impure substance
The answer to this is a pure substance (1st option).
The reactiveness of nonmetals depends on the atom's ability to what?
The ability of an atom to GAIN