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love history [14]
3 years ago
11

True or False? In a C++ floating-point constant, a decimal point is not required if exponential (E) notation is used.

Chemistry
1 answer:
defon3 years ago
7 0

Answer:

The answer is True

Explanation:

This is because they are equivalent and have same number of bit.

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Atoms and the chemical bonds that connect them cannot be observed with your eyes, so it is necessary to use a
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Atoms are too small to be seen on microscopes, so we model them based on theories.

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To create an ion you simply need to add or take away an electron true or false
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True

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ion: an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.

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When this element was discovered, it exhibited luster and malleability, and it reacted very vigorously with water. This element
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The mass of the erlenmeyer flask alone is 88.000 grams. calculate the mass of the zinc and hcl after the addition of 25 grams of
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If concentration of HCl is 1 mol/dm³ :
m(<span>erlenmeyer flask) = 88,00 g.
m(Zn) = 25,0 g.
V(HCl) = 15 ml = 15 cm</span>³ = 0,015 dm³.
Chemical reaction: Zn + 2HCl → ZnCl₂ + H₂.
n(HCl) = c(HCl) · V(HCl).
n(HCl) = 1 mol/dm³ · 0,015 dm³ = 0,015 dm³.
n(Zn) = 25 g ÷ 65,4 g/mol = 0,38 mol.
n(H₂) = 0,015 mol ÷ 2 = 0,0075 mol.
m(H₂) = 0,0075 mol · 2g/mol =  0,015 g.

7 0
3 years ago
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