Answer:
3.24 x 10⁴
Explanation:
There are only three sig figs in the starting integer, so to express that in Scientific Notation, you should have the same number of sig figs in the final answer.
Place a pointer at the end of the number 32,400, which should start behind the end of this number, which would be "32,400."
Move it to the left until you land on a number that IS NOT zero.
The number of spaces you've moved is the number of significant figures.
So once you get to the end, you'll notice you moved FOUR spaces, which explains why you are multiplying it by 10⁴.
The mass of Ca(CN)2 : 92,11 g/mol
<h3>Further explanation</h3>
Given
0.0321 moles of Ca(CN)2
Required
The mass
Solution
The mole is the number of particles contained in a substance
1 mol = 6.02.10²³
Moles can also be determined from the amount of substance mass and its molar mass
mol(n) = mass(m) : MW(molecular weight)
Input the value :
mass = mol x MW Ca (CN)2
mass = 0.0321 x 92,11 g/mol
mass = 2.957 g
The solution of weak monoprotic acid which is 0.10 M has pH = 3 .
<h3>Are strong and weak acids both monoprotic?</h3>
The greater the Ka value, the stronger the acid. Strong acids dissociate totally into protons and their respective conjugate bases. Diprotic acids have two acid dissociation steady values Ka.
<h3>How do you identify a monoprotic acid?</h3>
A monoprotic acid can be recognized via the presence of an equivalence point in a titration curve. Titration is a method used to decide the unknown attention of a solution from a answer whose awareness is known.
Learn more about monoprotic acids here:
<h3>
brainly.com/question/9423068</h3><h3 /><h3>#SPJ4</h3>
Answer: The correct answer is (B).
Explanation:
Hypothesis is a predictive statement which relates two or more phenomena.
- It is tested to observe or to see whether it is true or false with the help of scientific means.
- it relates dependent and independent factors with each other
Theory is a tested and proved framework which explains single or multiple observed phenomena
- It is thoroughly proved and tested through experiments and observations.
- it is strongly supported by scientific evidences and observations.
Hence, a hypothesis is a prediction for a specific situation, while a theory is used to make predictions for many similar situations.