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deff fn [24]
3 years ago
7

Is ice and salt endothermic or exothermic

Chemistry
1 answer:
Norma-Jean [14]3 years ago
5 0
Ice and salt are Exothermic 
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How many moles are present in 450 grams of sodium phosphide, Na3PNa3P?
BaLLatris [955]

Answer:

4.5moles

Explanation:

Given parameters:

Mass of Na₃P = ?

Unknown:

Number of moles  = ?

Solution;

The number of moles in a given substance can be derived from the expression below;

    Number of moles = \frac{mass}{molar mass}  

Molar mass of  Na₃P   = 3(23) + 31 = 100g/mol

   Number of moles  = \frac{450}{100}   = 4.5moles

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2 years ago
Cuál es tejidos conforman el sistema de tejido fundamental
ELEN [110]

Explanation:

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2 years ago
Which of the following is a chemical property of the noble gases?
spin [16.1K]
Noble gases are the elements located in the eighth group of the periodic table. These elements have the following properties:
They are odorless
They have single atoms (monoatomic)
They are colorless
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The naturally occurring noble gases are helium, neon, argon, krypton, xenon and radon.
5 0
3 years ago
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Rzqust [24]
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Your answer is correct

Which of the following is a homogenous mixture of two or more pure substances? 
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3 0
3 years ago
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Put an x of it is a physical property but of it is a chemical propety pit a +
makkiz [27]
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4 0
2 years ago
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