The Treaty of Versailles would require the United States to become involved in future international conflicts.
Therefore we can conclude that Germans oppose America involvement in future international conflicts.
Thus option 1. is the correct answer.
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Carbon has 4 valence electrons and has a close electronegativity like that of hydrogen and other nonmetals. Because of this, it tends to form covalents bonds equally spaced around it. The best association to this is the lewis structure for methane,CH4.
Carbon has the ability to for covalent bonds with other elements beside from itself. These bonds are the: single covalent bond; the double covalent bond; and, triple covalent bond.
To fully react with 750 g of HCl (approximately 20.5 moles), a minimum of 10.25 moles of sodium carbonate is needed.
To calculate the minimum amount of sodium carbonate needed to react fully with 750 g of HCl, we need to start by converting the 750 g of HCl to moles. The molecular weight of HCl is about 36.5 g/mol, so 750 g is about 20.5 mol of HCl. Looking at the reaction equation Na2CO3 + 2HCl → 2NaCl + CO2 + H2O, you can see that you need one mole of sodium carbonate to react with two moles of HCl. Therefore, to fully react with 20.5 mol of HCl, you will need a minimum of 10.25 mol of sodium carbonate.
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Answer:
The half life of the radioisotope is 12 hours.
Explanation:
Initial mass of the radioisotope = x
Final mass of the radioisotope = = 0.0625x
Half life of the radioisotope =
Age of the radioisotope = t = 48 hours
Formula used :
where,
= initial mass of isotope
N = mass of the parent isotope left after the time, (t)
= half life of the isotope
= rate constant
Now put all the given values in this formula, we get
The half life of the radioisotope is 12 hours.
I
H
(i) State the type of bonding in ammonia.
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6
The diagram shows 5 eletctron in the outermost shell of Nitrogen atom out of which 3 electrons are involved in the bond formation with 3Hydrogen atoms.
The type of bond in ammonia is Covalent.
Covalent bond is the bond formed by mutual Sharing of electrons by both the atoms taking part in the bond formation.
Nitrogen has 5valence electrons of which only 3 are shares with the 3 atoms of hydrogen (one electron shares with one atom of hydrogen)
Hence, type of bond in ammonia is covalent.
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Ammonia (NH3) has a covalent bonding type resulting in a tetrahedral electron-pair geometry, but because of the lone pair, the molecular structure is trigonal pyramidal. The bond angle is slightly less than 109.5⁰ due to the lone pair occupying more space.
The type of bonding in ammonia, which has a molecule structure as shown in the question, is covalent bonding. The ammonia molecule, NH3, has one lone pair and three single bonds which gives it a tetrahedral electron-pair geometry, as shown in Figure 7.18. However, because one of these regions is a lone pair that is not counted in the molecular structure, the molecule assumes a trigonal pyramidal shape.
The lone pair occupies more space than the single bonds, which leads to a slight deviation in the actual bond angles from the idealised angles. The angle in the ammonia molecule is slightly less than 109.5⁰ due to this additional electron pair's space occupancy.
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b. Methyl Mercury
c. Aflatoxins
d. Dioxins