Answer:
A , 210.3 g
Explanation:
Given data:
Number of moles of SiO₂ = 3.50 mol
Mass of SiO₂ = ?
Solution:
Formula:
Number of moles = mass/molar mass
Molar mass of SiO₂ = 60.08 g/mol
by putting values,
3.50 mol = mass/60.08 g/mol
Mass = 3.50 mol × 60.08 g/mol
Mass = 210.3 g
Adult human being =100 trillion cells
All cells originated from single cell essential for: propagation
Replacement of dead cells
Increasing number of cells for specific functions. Cell cycle regulation is disrupted in cancer
cis-2- butene-1,4-dioic acid and trans-2- butene-1,4-dioic acid are the 2 isomers with the molecular formula C₄H₄O₄.
<u>Explanation:</u>
Isomers are the structures having the same molecular formula but their is a difference in their structural formula and this concept is known as isomerism.
Here we have the molecular formula C₄H₄O₄ and it may be dicarboxylic acid and it may be exist as geometrical isomers as cis-2- butene-1,4-dioic acid and trans-2- butene-1,4-dioic acid.
The isomers are given.
We have M1V1=M2V2. Here M1 is to be found, V1=25ml=(25/1000)L &
M2=1.0M, V2=18ml=(18/1000)L.
Therefore M1=(M2V2)V1
so after putting values we get answer 0.72M.
Hope it helps.
The discoverer of the electron was Thomson. J. J. Thomson portrayed his atom model to look like a plum pudding. In his model, he described that an atom is composed mainly of electrons stuck within a sea of positive material. So its C