Charge on Helium = 0
'cause, charge = no. of protons-no. of electrons = 2-2 = 0
While there is some restriction on rotation around a double bond, it is possible to rotate around a single bond. The C-N bond (shown by the arrow) acquires certain double bond characteristics through resonance. As a result, the C-N double bond prevents the bond from rotating.
<h3>What is a chemical bond?</h3>
A chemical bond is a strong bond that can be formed between atoms, ions, or molecules to create chemical compounds. In covalent bonds, the electrons are shared, whereas, in ionic bonds, the electrostatic attraction of two ions with opposing charges forms the link. In contrast to dipole-dipole interactions, the London dispersion force, and hydrogen bonding, which are examples of "weak bonds" or "secondary bonds," covalent, ionic, and metallic bindings are examples of "strong bonds" or "primary bonds."
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Answer:
if it is espresso(1 shot), the coffee content to be considered is: (77/44)*(10/3)= 5.833= 0.005833 grams
Explanation:
1.706515172 ×10 to the power of 23
Answer:
0.056moles HF and 0.70M
Explanation:
When a strong acid is added to a buffer, the acid reacts with the conjugate base.
In the system, NaF and HF, weak acid is HF and conjugate base is NaF. The reaction of NaF with HCl (Strong acid) is:
NaF + HCl → HF + NaCl
Initial moles of NaF and HF in 60.0mL of solution are:
NaF:
0.0600L × (0.80mol / L)= 0.048 moles NaF
HF:
0.0600L × (0.80mol / L)= 0.048 moles HF
Then, the added moles of HCl are:
0.0200L × (0.40mol / L) = 0.008 moles HCl.
Thus, after the reaction, moles of HF produced are 0.008 moles + the initial 0.048moles of HF, moles of HF are:
<em>0.056moles HF</em>
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In 20.0mL + 60.0mL = 80.0mL = 0.0800L, molarity of HF is:
0.056mol HF / 0.0800L = <em>0.70M</em>