Answer:
Metals have one or two electrons in their outermost shell
C. 1-2
Explanation:
- Metals have low ionisation energy because they easily looses the outermost electrons
- They have only one- two electrons in the outer most shell.
- They loose these electron to form charged species called cation.
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<span>Formed when two or more atoms chemically bond together, the resulting compound is unique both chemically and physically from its parent atoms</span>
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HClO4 +NaOH -----> NaClO4 + H2O
moles of NaOH = (0.0832 x 50 ) /1000= 4.16 x10^-3 moles
since the mole ratio of HClO4 to NaOH is 1:1 the moles of HClO4 is also 4.16 x 10^-3 moles
volume of HClO4 is therefore = moles/ molarity
that is 4.16 x 10^-3mol/ 0.167 mol/L= 0.0249L
multiply by 1000 to convert to ml
0.0249 x 1000= 24.9 ml
Answer:
2.7g/cm³
Explanation:
Given parameters:
Dimension of the aluminum = 10.5cm x 10.5cm x 0.1cm
Mass of the aluminum = 29.8g
Unknown:
Density = ?
Solution:
Density of a substance is its mass per unit volume;
Mathematically;
Density =
Volume of the aluminum = 10.5cm x 10.5cm x 0.1cm = 11.025cm³
So, insert the parameters and solve;
Density = = 2.7g/cm³