Based on the equation below, which of the following statements best describes what should be observed as the reaction takes place?Zn(s) + 2HCl(aq) = ZnCl2(aq) + H2(g)
Select one or more:
a. Chlorine forming a solid precipitate
b. Bubbles forming from hydrogen gas production
c. Solid zinc dissolving
d. Bubbles forming from chlorine gas production
Answers
Related Questions
Which compound contains both ionic and covalentbonds?(1) CaCO3 (3) MgF2(2) PCl3 (4) CH2O
Which correctly summarizes the trend in electron affinity? it tends to be very high for group 2 it tends to be more negative across a period it tends to remain the same across periods it tends to be more negative down a group
Why is large scale nuclear fission a rare phenomenon on earth ?
Which component is required for the activation of some enzymes?a) Presence of a co-factor b) Basic pH levels in the substrate c) Higher enzyme concentration d) Lower temperature in the substrate
Answers
Na2CO3 Na2O +CO2 CO2 is the answer
When a single compound breaks down into two or more compounds or elements in a chemical reaction then it is known as decomposition reaction.
The chemical symbol for sodium carbonate is .
The decomposition of sodium carbonate is:
The decomposition of sodium bicarbonate, will result in the formation of sodium oxide,
and carbon dioxide,
.
Hence, carbon dioxide, will produce with sodium oxide,
on decomposition of
.
c. a carbon
b. a halogen
d. an alkane
Answers
Answers
Answer:
O-16 isotope is most likely to have the greatest abundance in nature.
Explanation:
Atomic mass of an isotopes of oxygen elements:
- O-16: 15.995 amu
- O-17: 16.999 amu
- O-18: 17.999 amu
Average atomic mass of an oxygen atom = 15.994 amu
Isotope with the value of atomic mass closest to the average atomic mass of the oxygen atom will have the greatest abundance in nature. As it will be found in much more greater extent in nature.
Where as isotope which is least close to the average atomic mass will have less abundance in nature.
O-16 isotope is most likely to have the greatest abundance in nature.
15.995 amu ≈ 15.994 amu
Answers
Answer:The pH is the negative log of H+
Explanation:a p e x
There are quite a few relationships between [H+] and [OH−] ions. And because there is a large range of number between 10 to 10-15 M, the pH is used. pH = -log[H+] and pOH = -log[OH−]. In aqueous solutions, [H+ ][OH- ] = 10-14. From here we can derive the values of each concentration.
-log[H+ ] + -log[OH- ] = -log[10-14]
pH + pOH = 14
So pH = 14 – pOH and pOH = 14 – pH
Answers
Answer;
2 fluorine atoms
Explanation;
- Calcium, a Group 2 metal, commonly forms a calcium ion (Ca2+). On the other hand, fluorine, a Group 7 non-metal, commonly forms a fluoride ion (F-). The necessity of electrical neutrality ensures that 2 Fluoride ions (F-) binds to one Ca2+
- The charge on calcium is 2+ and the charge on fluoride ions is 1-. It therefore requires 2 fluoride ions to make the compound electrically neutral.
Answers
mass no. = 56
and atomic no. = 26
=> in an atom there is an equal number of electrons and protons ...(e=p)..
=> also atomic number is the number of the electrons or protons ..
=> so here we got the no. of electrons and protons ..which is 26 ..
=> to find the number of neutrons in an atom , subtract atomic number from the mass number..i.e, 56 - 26 = 30 ...
=> so there are 26 electrons , 26 protons and 30 neutrons in the given atom ...
Hope it helps !!!