Answer:
helium Because it's in the 9th grade book
Answer:
Explanation:
Hydrocarbon:
a = An organic compound made up of only carbon and hydrogen.
Such as alkane, alkene, alkyne.
Cyclic hydrocarbon:
c = Carbon chain that form rings.
Such as benzene, cyclo heptane etc
Isomers:
d = Compounds with same molecular formula and different structural formula.
Alkanes:
e = refers to saturated hydrocarbons, no matter the shape
such as methane, ethane, propane etc.
Alkene:
f = Any hydrocarbon that have at lest one carbon carbon double bond.
such as ethene, propene, butene
Saturated hydrocarbons:
b = Carbon atoms are saturated with so many hydrogen atoms that no more bonds may be formed
such alkanes.
Plutonium-239 is used in nuclear bombs, here 239 is its mass number. For an atom, mass number is equal to sum of number of protons and neutrons.
Thus,
A=n+p=239...... (1)
From periodic table, the atomic number of plutonium is 94 which is equal to number of electron and proton in an atom.
Thus,
Z=p=94
Putting the value of p in equation (1)
n=239-94=145
The symbol is as follows:
Here, Z is atomic number, A is mass number and X is atom symbol thus, symbol for plutonium will be:
Therefore, number of protons, neutrons and symbol is 94, 145 and respectively.
Answer:
[H3O+] = 1.0*10^-12 M
[OH-] = 0.01 M
Explanation:
We can use the following equation to find the hydronium ion concentration. Plug in the pH and solve for H3O+.
pH = -log[H3O+]
<u>[H3O+] = 1.0*10^-12 M</u>
Now, to find the hydroxide ion concentration we will use the two following equations.
14 = pH + pOH
pOH = -log[OH-]
14 = 12 + pOH
pOH = 2
2 = -log[OH-]
<u>[OH-] = 0.01 M</u>
Answer:
The first step in forming the ch3cl lewis structure is drawing out all the atoms that exist within the molecule or ion being studied. Then, each atom must have its atomic number written above it. After this, draw lines between every bonded pair of non-identical electrons on adjacent atoms (bonded pairs are called “bonds”).