The immediate destructive action of a nuclear explosion is caused by this.a. Heat
b. Radiation
c. Dust
d. Shock
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CHEMISTRYWhich of the following properties of an element is least likely to change with beta decay? A. the mass number B. the period number C. the atomic number D. the name of the element When a nucleus has too many protons, it can absorb an electron and create _________. A. a proton B. a neutron C. an electron D. an alpha ray Which of the following occurs in beta decay? A. A neutron of an atom emits a high energy proton. B. A neutron of an atom emits a high energy electron. C. An electron of an atom emits a high energy proton. D. A neutron of an atom emits a second high energy neutron. What kind of ray is given off after electron capture? A. a beta ray B. a delta ray C. an alpha ray D. a gamma ray
Calculate the number of atoms of carbon in 3.8 moles of methane (CH4)
A rock can be broken down into different kinds of substances by physical processes. No chemical reactions are needed to separate different parts of a rock into pure substances. This is because a rock is a(n) .
The elements in each column have ___________
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b. green
water solutions have neutral pH ( ~7) so the indicator will turn green
Final answer:
Bromothymol blue would become green when added to water, due to water's neutral pH of around 7. This response uses pH levels and the color changes of bromothymol blue as indicators of acidity or basicity.
Explanation:
The color of bromothymol blue in water would be green. That's because the pH level of pure water is around 7, which falls within the range of 6 to 8 where bromothymol blue would turn green. Bromothymol blue is an indicator used in chemistry to identify pH levels by presenting different colors in solutions of different pHs: it turns yellow in solutions under pH 6, green between pH 6 to 8, and blue when the pH is above 8.
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The baking of a Pizza be Categorize as Endothermic Process
The baking of a pizza should be categorized as an endothermic process because the dough absorbs heat. An endothermic process is a method that absorbs energy from its surroundings which is habitually in the form of energy.
It can be a biochemical process like solving the salt in water or just the melting of ice. Therefore, the dough absorbs heat and it is categorized as an endothermic process.
Answer:
The correct answer is endothermic process.
Explanation:
An endothermic process is one in which the system absorbs heat from the environment. In the pizza baking process, the dough absorbs the heat from the oven. The flow of heat goes from the oven to the pizza. In this case, it is about thermal energy, if the temperature of a body increases, the thermal energy of the body also does it.
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2CuSO4 (aq) + 2H20 (1) -> 2Cu(s) + 2H2SO4(l) + O2(g)
A. CuSO4
B. Cu
C. H2SO4
D. H2
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Cu will be produced at the negative electrode for the following reaction:
2CuSO4 (a q) + 2H20 (1) -> 2Cu(s) + 2H2SO4(l) + O2(g) ,therefore option (b) is correct.
What do you mean by the term electrolysis ?
Electrolysis is defined as a process of decomposing ionic compounds into their elements by passing a direct electric current through the compound in a molten form.
Characteristics of negative electrode -:
The negative electrode in an electrolytic cell, is the one toward which positively charged particles are attracted.
The cathode has a negative charge because it is connected to the negatively charged .
When an electrolyte is dissolved in water and an electric current is passed through it, the Cations move towards the cathode and Anions move towards anode .
Cu will be produced at the negative electrode for the following reaction:
2CuSO4 (a q) + 2H20 (1) -> 2Cu(s) + 2H2SO4(l) + O2(g) ,hence option (b) is correct.
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The H2 product will be produced at the negative electrode for the following reaction 2CuSO₄ (aq) + 2H₂0 (1) -> 2Cu(s) + 2H₂SO₄(l) + O₂(g). option D is correct.
What is electrodes?
The electrode is an electrical conductor or source of electricity that carries electric current or circuit to the non-metallic circuit parts of a circuit, some examples are electrolyte and semiconductor.
The following reaction 2CuSO₄ (aq) + 2H₂0 (1) -> 2Cu(s) + 2H₂SO₄(l) + O2(g) is a redox reaction in which the negative end is producing the H2 gas and copper gets solidify at the positive end.
Therefore, H₂ product will be produced at the negative electrode for the following reaction 2CuSO₄ (aq) + 2H₂0 (1) -> 2Cu(s) + 2H₂SO₄(l) + O₂(g). option D is correct.
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B) The covalent N-glycosidic bond between the base and the pentose breaks.
C) The helical structure unwinds.
D) The hydrogen bonds between A and T break.
E) The viscosity of the solution decreases.
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Answer:
B) The covalent N-glycosidic bond between the base and the pentose breaks
Explanation:
When forces that bind 2 DNA strands are broken, these strands finally split. This process is called denaturalization
The main forces that remain both DNA strands together are the hydrogen bonds (physical forces), between pair of bases (Adenine with Thymine, and Guanine with Cytosine)
Denaturalization may occur by different factor: Ph alteration, salt addition, temperature (heating), etc
When heating a DNA solution, denaturalization process may be followed using UV absorption (normally, at wavelength of 260 nm): when DNA (double strand) has its regular structure, UV light absorption is low, as the nitrogen bases are stacked like a pile of coins, for which structure absorbs less light
When DNA structure is denaturalized, these nitrogen bases are exposed, and UV absorption increases
Also, DNA denaturalization may be followed by viscosity: for a double strand DNA solution, viscosity is high due to double chain stiffness but when strands are denaturalized, simple strands solution are less viscous (so viscosity decreases over time, when heating the solution)
Lastly, when solution is heated, only physical forces are broken (hydrogen bonds) and not chemical bonds (such as covalent bonds), for which extreme conditions are needed
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Final answer:
The compound Al2(CrO4)3 contains 12 oxygen atoms per formula unit. Knowing that one mole of oxygen atoms has a mass of 16.00 grams, the total mass of oxygen in 1.00 mole of Al2(CrO4)3 is grams.
Explanation:
The primary task here is to find the total mass of oxygen in 1.00 mole of Al2(CrO4)3. This is a classic chemistry problem that involves understanding the composition and molar mass of compounds. In the compound Al2(CrO4)3, the subscript 3 after (CrO4) means there are three chrome tetraoxides in one formula unit of the compound.
Every CrO4 ion is composed of one chromium atom and four oxygen atoms. Therefore, three CrO4 ions will contain 3 * 4 = 12 oxygen atoms.
Knowing that one mole of oxygen atoms weighs approximately 16.00 grams, we can find the total mass of oxygen in the compound by multiplying this molar mass by the number of oxygen atoms. Again, in one mole of Al2(CrO4)3 we have 12 oxygen atoms, hence grams.
So, the total mass of oxygen present in 1.00 mole of Al2(CrO4)3 is 192.00 grams.
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