Answer is: sodium fluoride NaF.
Sodium fluoride hydrolyse on strong base sodium hydroxide (NaOH) and weak acid hydrofluoric acid (HF), so water solution has pH greater that seven ant it is basic. Other salts have neutral or acidic pH value in water, because they hydrolyse on strong acid and weak or strong base.
Answer:Scientific evidence is evidence that serves to either support or counter a scientific theory or hypothesis, although scientists also use evidence in other ways, such as when applying theories to practical problems.
Explanation:
:) axtxmn.nx instaa
Answer:
Protons = 89
Neutrons = 142
Electrons = 89
Option C
Explanation:
Hello,
Were required to find the proton, neutron and electron of an element Y
The atomic mass of element Y is composed of the protons and neutrons while the atomic number is the exact amount of protons present in the element.
Element = ₈₉²³¹Y
Atomic number = 89
Number of protons = 89
Number of electrons = 89
Atomic mass = 231
Atomic mass = protons + neutrons
231 = 89 + neutrons
Neutrons = 231 - 89
Neutrons = 142
Therefore the number of protons is 89, number of neutrons is 142 and number of electrons is 89.
Note: for an electrically neutral atom, the number of protons must be equal to the number of electrons
Answer:
725L
Explanation:
From the question given, we obtained the following information:
V1 = 274L
P1 = 133kPa
T1 = 316k
P2 = 98kPa
T2 = 616K
V2 =?
We can obtain the new volume by doing the following:
P1V1/T1 = P2V2/T2
133 x 274 / 316 = 98x V2 / 616
Cross multiply to express in linear form:
316 x 98 x V2 = 133 x 274 x 616
Divide both side by 316 x 98
V2 = ( 133 x 274 x 616) /316 x 98
V2 = 725L
Therefore, the new volume is 725L
Answer: The molecular formula will be 
Explanation:
Molecular formula is the chemical formula which depicts the actual number of atoms of each element present in the compound.
Empirical formula is the simplest chemical formula which depicts the whole number of atoms of each element present in the compound.
The empirical formula is
The empirical weight of = 6(12)+6(1)+1(16) = 94 g.
The molecular weight = 
Now we have to calculate the molecular formula.
The molecular formula will be=
