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Amanda [17]
3 years ago
7

This is urgent!Does the element Francium have a smell or taste?

Chemistry
2 answers:
AnnyKZ [126]3 years ago
8 0
I don't think any one would know, really. It's highly radioactive (apparently) and has never been viewed in bulk, so we don't even know what it would look like as a metal! I would just say NO
zheka24 [161]3 years ago
4 0
It has No smell and unknown taste
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Compared to a solution with a ph value of 7, a solution with a thousand times greater hydronium ion concentration has a ph value
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Answer:

pH = 4

Explanation:

pH is a base 10 logarithmic scale

  1000 = 10^3

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7 0
2 years ago
At 20 ?C the vapor pressure of benzene (C6H6)is 75 torr, and that of toluene (C7H8) is 22 torr
tia_tia [17]

Answer:

(a) Benzene = 0.26; toluene = 0.74

(b) Benzene = 0.55

Explanation:

1. Calculate the composition of the solution

For convenience, let’s call benzene Component 1 and toluene Component 2.

According to Raoult’s Law,  

p_{1} = \chi_{1}p_{1}^{\circ}\\p_{2} = \chi_{2}p_{2}^{\circ}

where

p₁ and p₂ are the vapour pressures of the components above the solution

χ₁ and χ₂ are the mole fractions of the components

p₁° and p₂° are the vapour pressures of the pure components.

Note that

χ₁ + χ₂ = 1

So,  

\begin{array}{rcl}p_{\text{tot}} &=& p_{1} + p_{2}\\p_{\text{tot}} & = & \chi_{1}p_{1}^{\circ}  + (1 - \chi_{1})p_{2}^{\circ}\\36 & = & \chi_{1}\times 75  + (1 - \chi_{1}) \times 22 \\36 & = & 75\chi_{1} + 22 -22\chi_{1}\\14 & = & 53\chi_{1}\\\chi_{1} & = & \mathbf{0.26}\\\end{array}

χ₁ = 0.26 and χ₂ = 0.74

2. Calculate the mole fraction of benzene in the vapour

In the liquid,  

p₁ = χ₁p₁° = 0.26 × 75 mm = 20 mm

∴ In the vapour

\chi_{1} = \dfrac{p_{1}}{p_{\text{tot}} } = \dfrac{\text{20 mm} }{\text{36 mm}}  = 0.55

Note that the vapour composition diagram below has toluene along the horizontal axis. The purple line is the vapour pressure curve for the vapour. Since χ₂ has dropped to 0.45, χ₁ has increased to 0.55.

7 0
3 years ago
Write formulas for the ionic compounds formed by the following ions <br> magnesium and chloride
Xelga [282]

════════ ∘◦❁◦∘ ════════

<h3>Chemical reaction formula</h3>

#you can see the formula in pic for more detail writting

Mg2+ + Cl- -> MgCl2

════════════════════

<h3>Chemical formula of product : MgCl2</h3>

════════════════════

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An example of a pure metal with a hexagonal close-packed arrangement is
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Zinc is an example of a pure metal with a hexagonal close-packed arrangement.
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