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3 years ago

Ripromano

Chemistry

1 answer:

4vir4ik [10]3 years ago

4 0

Answer:

Socrates was a Greek philosopher, considered one of the most important, a master of Plato, who called Aristotle a disciple

Explanation:

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Express your answer to three significant figures and include appropriate units

nata0808 [166]

Answer:

58.702

Explanation:

Data obtained from the question include:

Mass number of isotope 1 (M1) = 57.93

Abundance of isotope 1 (M1%) = 67.76%

Mass number of isotope 2 (M2) = 59.93

Abundance of isotope 2 (M2%) = 26.16%

Mass number of isotope 3 (M3) = 60.93

Abundance of isotope 3 (M3%) = 1.25%

Mass number of isotope 4 (M4) = 61.93

Abundance of isotope 4 (M4%) = 3.66%

Mass number of isotope 5 (M5) = 63.93

Abundance of isotope 5 (M5%) = 1.16%

Relative atomic mass =...?

The relative atomic mass(RAM) of the element can be obtained by doing the following:

RAM = [(M1×M1%) /100] +[(M2×M2%) /100] + [(M3×M3%) /100] + [(M4×M4%) /100] + [(M5×M5%) /100]

RAM = [(57.93×67.76)/100] + [(59.93×26.16)/100] + [(60.93×1.25) /100] + [(61.93×3.66)/100] + [(63.93×1.16)/100]

RAM = 39.253 + 15.678 + 0.762 + 2.267 + 0.742

RAM = 58.702

Therefore, the relative atomic mass (RAM) of the element is 58.702

7 0

3 years ago

Why do we need to calibrate equipment

Vlad1618 [11]

Answer:

to be precise in the calculations

Explanation: for example your cell phone has a gps inside it, the gps is responsible for providing direction data like a compass, if the equipment is not calibrated, the gps will not find the correct direction.

3 0

3 years ago

How we can measure the density of different wooden object?

Novay_Z [31]

Seeing how much of the object can take with an amount of pressure

5 0

4 years ago

What will create a insoluble salt with a potassium ion

navik [9.2K]

Explanation:

1) The dissolution of the salt potassium sulfite:

K₂SO₃(aq) → 2K⁺(aq) + SO₃²⁻(aq).

Potassium has +1 charge because it lost one electron to accomplish stabile electron configuration of noble gas argon.

2) From dissolution reaction: n(K⁺) : n(SO₃²⁻) = 2 : 1.

n(K⁺) = 0.700 mol.

0.700 mol : n(SO₃²⁻) = 2 : 1.

n(SO₃²⁻) = 0.700 mol ÷ 2.

n(SO₃²⁻) = 0.350 mol; amount of sulfite anions.

4 0

3 years ago

A 8.249 gram sample of copper is heated in the presence of excess fluorine. A metal fluoride is formed with a mass of 13.18 g. D

levacccp [35]

Answer:

$CuF_2$ the empirical formula of the metal fluoride.

Explanation:

Mass of copper heated = 8.249 g

Mass of copper fluoride formed = 13.18 g

Mass of fluorine gas in copper fluoride = x

$13.18 g = 8.249 g + x\\x= 13.18 - 8.249 g = 4.931 g$

Moles of copper :

$= \frac{8.249 g}{63.546 g/mol}=0.1298 mol$

Moles of fluorine:

$= \frac{4.931 g}{18.998 g/mol}=0.2596 mol$

For the empirical formula divide the smallest mole of an element with all the moles of elements present in the compound.

$Copper= \frac{0.1298 mol}{0.1298 mol}=1\\Fluorine = \frac{0.2596 mol}{0.1298 mol}=2$

The empirical formula of the copper fluoride = $CuF_2$

$CuF_2$ the empirical formula of the metal fluoride.

6 0

3 years ago