Answer:
True
Explanation:
Answer:
true
Explanation:
Which of the following are isotopes, choose all that apply.
Element X with atomic number 10 and atomic mass 21
Element Y with atomic number 11 and atomic mass 21
Element Z with atomic number 10 and atomic mass 22
Element M with atomic number 12 and atomic mass 21
Answer:
Element X with atomic number 10 and atomic mass 21
Element Z with atomic number 10 and atomic mass 22
Explanation:
Isotopy is the existence of two or more atoms of the same element having the same atomic number but different mass numbers due to the differences in the number of neutrons in their various nuclei.
Isotopes of an element have the same electronic configuration. They share the same chemical propertiesThey only differ in their masses.So, Element X and Z with atomic number 10 which is their number of electrons are isotopes. Their mass number, 21 and 22 differs.
The enzyme known as alcohol dehydrogenase is capable of oxidizing ethanol, methanol and other hydroxyl group containing organic compounds into their corresponding aldehydes. Such an enzyme with ___ catalyzes the reaction of structurally related substances.
Answer:
Relative specificity.
Explanation:
Relative specificity can be defined as a phenomenon whereby molecules in a biochemical environment interacts or relates differentially with a large number of its partner, target, or substrate and as such affecting them respectively depending on each partner, target or substrate.
An enzyme refers to a biological catalyst that is typically used to speed up (accelerate) the rate of a chemical reaction by lowering the activation energy of its reactants.
The enzyme known as alcohol dehydrogenase is capable of oxidizing ethanol, methanol and other hydroxyl group containing organic compounds into their corresponding aldehydes. Such an enzyme with relative specificity catalyzes the reaction of structurally related substances known as substrates with similar structures and bonds.
Analyze: The first shell can hold a maximum of two electrons. How does this explain the valence of hydrogen
Answer:
See explanation
Explanation:
Hydrogen has a valency of +1 or -1. Its electronic configuration is 1s1.
The 1s sub-level (first shell) is known to hold two electrons. This means that hydrogen may either loose this one electron in the 1s level to yield H^+ or accept another electron into this 1s level to form H^- (the hydride ion).
The formation of the hydride ion completes the 1s orbital.
Calcium carbonate is a white mineral. A chemist burns calcium carbonate, CaCO3, to produce carbon dioxide, CO2, and a white powder, CaO. The following chemical equation shows the reaction.
CaCO3 ---------> CO2 + CaO
A. Compare the properties of the products and reactants in this reaction.
B. Use numbers of atoms to describe the amounts of calcium, carbon, and oxygen before and after the reaction.
Answer:
A chemist burns calcium carbonate, CaCO3, to produce carbon dioxide, CO2, and a white powder, CaO. The following chemical equation shows the reaction.
Explanation:
m carbonate, CaCO3, to produce carbon dioxide, CO2, and a white powder, CaO. The following chemical equation shows the reaction.
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B. Use numbers of atoms to describe the amounts of calcium, carbon, and oxygen before and after the reaction.
The reaction is decomposition of calcium carbonate into calcium oxide and carbon dioxide. Here, calcium carbonate and calcium oxide are solids and carbon dioxide is gas.
What is calcium calcium carbonate?Calcium carbonate is an abundant mineral of calcium which is deposited in many living and non-living things. Calcium carbonate is also called limestone, chalk, calcite etc.
Calcium carbonate is present in shells of some animals. It is prepared by passing carbon dioxide gas through calcium oxide. Calcium oxide is otherwise called lime or quicklime. which is able to spontaneously absorb carbon dioxide.
Carbon dioxide is the only gas form in this reaction and which make the reaction system heterogenous. In the reaction one mole of calcium carbonate produces one mole of each calcium oxide and carbon dioxide.
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As NaOH is added to an aqueous solution, the pH will 1. decrease. 2. Not enough information is given to solve the problem. 3. be unaffected because NaOH is not an acid. 4. increase or decrease depending on whether the initial pH is higher or lower than 7. 5. increase
K20 is potassium oxide and is composed of __ atoms of potassium and __ atom of oxygen.