Answer:
Cells are the basic building blocks of living things.
Explanation:
So the answer is cells because it is composed of trillions of cells, all with their own specialised function. Cells are the basic structures of all living organisms.
I hope this helps you pass and humble yourself you will get to it, you got this!!!
i just cant understand the question
please take a clear pic
Answer:
3.56x10²³ atoms
Explanation:
To solve this question we need first to determine the moles of iron (II) chloride, FeCl₂, using its molar mass. Then, using Avogadro's number we can solve for the number of atoms:
<em>Moles FeCl₂ - Molar mass: 126.751g/mol-</em>
25g FeCl₂ * (1mol / 126.751g) = 0.1972 moles
<em>Number of atoms:</em>
1 mole of FeCl₂ are 6.022x10²³ molecules of FeCl₂, that means 0.1972moles are:
0.1972mol * (6.022x10²³ molecules / 1mol) = 1.188x10²³ molecules of FeCl₂
In 1 molecule of FeCl₂ there are 3 atoms (1 of Fe and 2 of Cl), in 1.188x10²³ molecules of FeCl₂ there are:
1.188x10²³ molecules of FeCl₂ * (3atoms / molecule) =
<h3>3.56x10²³ atoms</h3>
Answer:
C
B
D
A
<em><u>Could I please have BRAINLIEST.</u></em>
<h3><u>Answer;</u></h3>
<u>= 5 M or 5 moles/liter</u>
<h3><u>Explanation;</u></h3>
At point E, 90 g of substances X are dissolved in 100 g of the solvent.
100g of the solvent is equal to 100 ml
Molarity is the number of moles of a substance in one liter of a solvent.
90 g of X are in 100 ml
But; the RFM of X = 180 g/l
Therefore; the moles of X in 90 g = 90/180
= 0.5 moles
Therefore;
0.5 moles of X are contained in 100 ml of the solvent;
Thus, molarity = 0.5 × 1000/100
=<u> 5 M or 5 moles/liter</u>