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olchik [2.2K]
3 years ago
6

A ------------ ----------------- is the dying out of a large number of species on a global scale

Chemistry
1 answer:
ziro4ka [17]3 years ago
5 0

Answer:

Extinction event or sometimes known as Mass extinction

Explanation:

These events typically are typically widespread and rapid decrease in the biodiversity (which takes into account spread and existence of current species). The worst mass extinction was Permian–Triassic extinction where over 90% of species of organisms vanished.

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In a chemical reaction, the reactants (beginning elements or compounds) but have the same number and type of atoms as the produc
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Answer:The law of conservation of matter says that matter cannot be created or destroyed. In chemical equations, the number of atoms of each element in the reactants must be the same as the number of atoms of each element in the products. ... There are two oxygen atoms in the reactants and two atoms of oxygen in the product.

Explanation:

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What should be ph-value to be strong acid?
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<em>what should be ph-value to be strong acid?</em>

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The melting points of ionic compounds are typically high and those of molecular compounds are typically low. What would the melt
sveticcg [70]

Answer:

The answer to your question is  "It will be a high melting point"

Explanation:

Process

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Covalent compounds are composed of 2 nonmetals.

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Name the stellar process in which the fusion of hydrogen produces other elements.
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3 0
3 years ago
Calculate the nuclear binding energy in mega-electronvolts (MeV) per nucleon for 136 Ba . 136 Ba has a nuclear mass of 135.905 a
sergey [27]

Answer:

8.194 Mev per nucleon

Explanation:

Mass of Barium = 135.905 amu

number of proton = 56, number of neutron = 80

Md = (Mp + Mn) - Mb Mp is the mass of proton, Mn is the mass of neutron, Mb is the mass of barium and Md is the mass defect

Mn = 1.00867 amu Mp = 1.00728 amu

Md = ( 56 ( 1.00728) + 80 ( 1.00867) = 137.1013 - 135.905 =1.1963 amu

Md = 1.1963 × 1 ÷ ( 6.02214 × 10 ²⁶ amu ) = 1.9865 × 10 ⁻²⁷ kg

Energy = mc² = 1.9865 × 10 ⁻²⁷ kg × (2.99792 × 10 ⁸ m/s)²

E= 1.78537 × 10⁻¹⁰ J

to convert to Mev

1.78537 × 10⁻¹⁰ × 6241457006000 = 1114.33 Mev

binding energy per nucleon = 1114.33 / 136 =8.194 Mev per nucleon

5 0
3 years ago
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