Pedro is baking a cake for his experiment on chemical changes. He knows a chemical change will occur when he puts the cake mixture in the oven. He would like to know what will happen when the cake is removed from the oven. What prediction would you make for Pedro's experiment? A. The chemical changes occurred because the chemicals changed. B. The chemical changes occurred because there was a change in light energy. C. The fruit and the hamburgers were affected by an increase in heat energy. D.The fruit and the hamburgers were affected by a decrease in heat energy.

15.0 moles of ammonium sulfate are formed by the reaction of 30.0 moles of ammonia with sulfuric acid.

Let's consider the reaction between ammonia and sulfuric acid to produce ammonium sulfate.

2 NH₃ + H₂SO₄ ⇒ (NH₄)₂SO₄

The molar ratio of NH₃ to (NH₄)₂SO₄ is 2:1. The moles of (NH₄)₂SO₄ produced from 30.0 moles of NH₃ are:

15.0 moles of ammonium sulfate are formed by the reaction of 30.0 moles of ammonia with sulfuric acid.

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Answer:

true

Explanation:

Answer:

True the wind causes waves in the ocean

Explanation:

Answer:

The specific heat capacity of the metal is approximately 0.3903 J/(g·°C)

Explanation:

The mass of the sample of the unknown metal, = 134.0 g

The temperature to which the metal is raised, = 91.0°C

The mass of water into which the mass of metal is placed, = 125 g

The temperature of the water into which the metal is placed, = 25.0°C

The final temperature of the water, = 31.0°C

The specific heat capacity of water, = 4.184 J/(g·°C)

The specific heat capacity of the metal =  

Therefore, by the first laws of thermodynamics we have;

The heat transferred = Heat supplied by the metal = Heat gained by the water

The heat transferred, ΔQ, is given as follows;

ΔQ = ××( - ) = × ×( - )

125 × 4.184 × (31 - 25) = 134 × × (91 - 31)

∴ = (125 × 4.184 × (31 - 25))/(134 × (91 - 31)) ≈ 0.3903 J/(g·°C)

The specific heat capacity of the metal =   ≈ 0.3903 J/(g·°C)

Explanation:

Hydrogen atoms of one water molecule are attracted towards the oxygen atom of a neighboring water molecule can be termed as an intramolecular bond.

Generally, the oxygen atom is partially negatively charged, and the hydrogen atom is partially positively charged, so an arttraction occurs which forms this hydrogen bond. The attraction of the O-H bonding electrons towards the oxygen atom leaves a deficiency on the far side of the hydrogen atom relative to the oxygen atom. The result is that the attractive force between the O-H hydrogen and the O-atom of a nearby water molecule is strong.