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Ivan
3 years ago
5

The SI unit for quantity of radioactive materials is:

Chemistry
1 answer:
DanielleElmas [232]3 years ago
3 0
The unit would be Becquerel, But I could be wrong.
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When solutions of barium chloride and lithium sulfate are mixed, the spectator ions in the resulting reaction are?
Pepsi [2]
Barium chloride and lithium sulfate are mixed, barium sulfate and lithium chloride are formed. Barium sulfate is obtained as a white precipitate and lithium chloride as an aqueous solution.

Hope it helped!
8 0
3 years ago
Read 2 more answers
Be sure to answer all parts. for each reaction, find the value of δso. report the value with the appropriate sign. (a) 3 no2(g)
Maurinko [17]

Answer:

Change in entropy for the reaction is

ΔS° = -268.13 J/K.mol

Explanation:

To calculate the change in entropy for the balanced reaction, we require the natural entropy of all the reactants and products in the reaction.

3 NO₂(g) + H₂O(l) → 2 HNO₃(l) + NO(g)

From Literature.

S°(NO₂) = 240.06 J/K.mol

S°(H₂O) = 69.91 J/K.mol

S°(HNO₃) = 155.60 J/K.mol

S°(NO) = 210.76 J/K.mol

These are the entropies of the reactants and products under standard conditions of 298.15 K and 1 atm.

Note that

ΔS° = Σ nᵢS°(for products) - Σ nᵢS°(for reactants)

Σ nᵢS°(for products) = [2 × S°(HNO₃)] + [1 × S°(NO)]

= (2 × 155.60) + (1 × 210.76) = 521.96 J/K.mol

Σ nᵢS°(for reactants) = [3 × S°(NO₂)] + [1 × S°(H₂O)]

= (3 × 240.06) + (1 × 69.91) =790.09 J/K.mol

ΔS° = Σ nᵢS°(for products) - Σ nᵢS°(for reactants)

ΔS° = 521.96 - 790.09 = -268.13 J/K.mol

Hope this Helps!!

4 0
3 years ago
Hydrogen peroxide, H2O2, decomposes according to the equation above. This reaction is thermodynamically favorable at room temper
s2008m [1.1K]

Answer:

4H₂O₂ → 4H₂O + 2O₂

Explanation:

The chemical reaction for the decomposition of hydrogen peroxide can be represented as follows;

2H₂O₂ → 2H₂O + O₂

Therefore, two molecules of hydrogen peroxide decomposes into two molecules of water and one molecule of oxygen.

In a related diagram, we have 4 molecules of hydrogen peroxide decomposing, therefore we have;

4H₂O₂ → 4H₂O + 2O₂

The attached diagram shows the products of the decomposition of the four molecules of hydrogen peroxide.

4 0
3 years ago
How many grams of salt(NaCl) are in 4.8 moles?
Dafna11 [192]
Molar mass of salt = 58.44 grams/mole

m = 58.44 \frac{g}{mol}  \times 4.8mol = 280.512g
5 0
2 years ago
The properties of elements can be predicted by which of the following? Where it is on the periodic table Where it was discovered
grandymaker [24]

Answer:

Where it is on the periodic table

Explanation:

The periodic table is a table that provides a systematic pattern for arranging elements.

The table is based on the periodic law. The modern version of the periodic law states that " the properties of elements are periodic function of their atomic number".

In the modern periodic table, elements having the same number of electrons in their outermost shell are placed over one another in a vertical column.

Elements in the same group exhibits similar chemical properties because of the same number of electrons in their outermost shell. Physical properties also varies progressively down any group.

So, the position of an element on the periodic table determines its properties.

3 0
3 years ago
Read 2 more answers
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