report the answer to the
appropriate number of
significant figures.
1204.2 +4.79613 = [ ? ]
This problem is providing a mathematical expression which the result should be expressed with the correct significant figures. At the end, the result is 1209.0 because of the following:
In science, the use of significant figures is crucial as long numbers are not necessarily required when reporting a numerical value, for that reason the importance of reporting measurements with the correct number of significant figures.
In the case of additions, we perform the normal operation as the first step:
1204.2 +4.79613 = 1208.99613
Next, we round the result to the leastnumber of decimal places, in this case one because 1204.2 has just one decimal place, unlike the 4.79613 which has five, so that we round the 8 up to 9 and leave a 0 as the onlydecimalplace:
1209.0
Learn more about significant figures: brainly.com/question/11904364
2) KHSO3+ and O2– ions
3) K+ and HS– ions
4) K+ and HSO4– ions.
In the compound KHSO4, there is an ionic bond between the K+ and HSO4– ions.
Ionic bond is a type of bond that is formed between metals and non metals. During the reaction, metals usually donate electron[s] to non metals. The metals thus become positively charged while the non metals become negatively charged. Therefore, ionic compound are usually composed of charged particles. For the ionic compound given above, the charged particles in the compound are K+ and HSO4- ions.
O B. conjugate acid to conjugate base
O C. conjugate base to conjugate acid
OD. solute to the amount of solvent in a solution
Answer:
Option C
Explanation:
A buffer aqueous solution consists of
a) either a weak acid along with its conjugate base
b) or a weak base along with its conjugate acid.
This is used to prevent change in the pH of a solution whenever an acid or a base is added. The pH of a buffer depends upon the ratio of base to acid and this ratio is determined by the Ka value and Henderson-Hasselbalch equation. An ideal buffer has equal amounts of acid and conjugate base
Hence, option C is correct
An atom of sodium, with an atomic number of 11, has 11 protons and 11 electrons. The atomic number is indicative of both the number of protons in an atom and, in a neutral atom, the number of electrons.
The atomic number of an element corresponds to the number of protons in the nucleus of its atom. So, an atom of sodium whose atomic number is 11 has 11 protons. As the atom is neutral, it also means that the atom will have 11 electrons to balance the 11 positive charges of the protons. This information can be found on the periodic table, which gives the atomic number and the atomic mass of each element.
#SPJ2
Answer: C. Evaporating and condensing
Explanation: Phase change process id the process in which the phase of one substance is transforming into the another.
These chemical process of transformation can takes place under dynamic equilibrium in which conversion of one phase is in equilibrium with the another one.
In this liquid phase is transforming into the gas phase which is known as Evaporation and gaseous phase is converting back into the liquid phase which is known as Condensation.