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3 years ago

Which is most likely why many scientists reject the cold fusion theory?

Chemistry

2 answers:

mina [271]3 years ago

8 0

The original results have not been replicated consistently and reliably.

Sergio [31]3 years ago

7 0

The original results have not been replicated consistently and reliably. Martin Fleischmann and Stanley Pons were the first scientists to have conducted this but when replicated, gave lacking results.

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What is the molar mass of Al2(SO4)3

umka21 [38]

Answer:

The molar mass of $Al_2(SO_4)_3$ is 342.145 g/mol

Explanation:

The molar mass is stated as the “mass per unit amount of substance”of a given chemical compound

$Al_2(SO_4)_3$ is Aluminium sulphate. They easily dissolve in water. It is primarily used as a 'coagulating agent' in the drinking water purification and also in waste and sewage water treatment plants,

We know,

Atomic weight of Aluminium = 26.981

Atomic weight of Sulphur= 32.065

Atomic weight of Oxygen = 15.9994

Now molar mass of $Al_2(SO_4)_3$ (Aluminium sulphate) is

=>2(26.981)+3(32.065+4(15.999))

=>53.962 +3(32.065+63.996)

=>53.962+3(96.061)

=>53.962+288.183

=>342.145

4 0

3 years ago

A vaccum cleaners has 120j 45j are used how effucent is the cleaner

Nostrana [21]

J=75. Because he has already used 45 of his/her 120

5 0

3 years ago

Read 2 more answers

A chemist mixes 96.2 g of chloroform with 31.2 g of acetone and 98.1 g of acetyl bromide. Calculate the percent by mass of each

stiv31 [10]

Answer:

42.6 % CHCl₃, 13.83 % C₃H₆O and 43.5 % CH₃COBr

Explanation:

This is a solution with 3 compounds:

96.2 g of CHCl₃

31.2 g of C₃H₆O

98.1 g of CH₃COBr

Total mass of solution is : 96.2g + 31.2 g + 98.1g = 225.5 g

Percent by mass is, the mass of the compounds in 100 g of solution

Let's prepare the rule of three

225.5 g of solution have ____ 96.2 g ___ 31.2 g _____98.1 g

100 g of solution would have ____

(100 . 96.2) / 225.5 = 42.6

(100 . 31.2) / 225.5 = 13.83

(100 . 98.1) / 225.5 = 43.5

5 0

3 years ago

Consider the following reaction:

lyudmila [28]

Answer:

Explanation:

Fe + Cl₂ → FeCl₃

a. The balanced equation

All chemical equations obey the law of conservation of matter. To balance this above equation, we either inspect or use mathematical method to obtain a balanced equation.

We put coefficients a, b and c at the back of the compounds as shown below:

aFe + bCl₂ → cFeCl₃

For Fe:

a = c (i)

For Cl:

2b = 3c (ii)

let a = 1, c= 1

Solving for the unknown b, we have:

b = $\frac{3c}{2}$

b = $\frac{3}{2}$

The complete reaction equation is therefore:

Fe + $\frac{3}{2}$ Cl₂ → FeCl₃

2Fe + 3Cl₂ → 2FeCl₃

Problem a:

Mass of reacting iron = 25g

unknown: number of moles of iron

Solution

To find the number of moles, we apply the mole concept using the expression below:

$number of moles = \frac{mass}{molar mass} \\$

To find the molar mass of the reactant iron, we know atomic mass of iron is 56g.

The molar mass is therefore, 56gmol⁻¹

$number of moles = \frac{25}{56} \\$

number of moles of the iron reactant = 0.45mole

Problem b:

From the balanced equation of the reaction:

2Fe + 3Cl₂ → 2FeCl₃

2 moles of Fe produces 2 moles of FeCl₃

So 0.45mole of Fe would produce 0.45 mole of FeCl₃

Problem C:

Applying the mole concept;

mass of FeCl₃ = number of moles of FeCl₃ x molar mass of FeCl₃

number of moles of FeCl₃ = 0.45mole

molar mass of FeCl₃ = ?

Atomic mass of Fe = 56g

Cl = 35.5g

Molar mass of FeCl₃ = 56 + (3 x 35.5) = 56 + 106.5 = 162.5gmol⁻¹

mass of FeCl₃ = 0.45 x 162.5 = 73.1g

5 0

3 years ago

A simplified model of an electromagnet is shown here, where a loop of wire is placed around an iron nail. The wire is

Ede4ka [16]

Answer:

CDE

Explanation:

If your on USA test perp

7 0

3 years ago