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Ira Lisetskai [31]
2 years ago
8

What observation would indicate that an endothermic reaction is occuring in a beaker

Chemistry
1 answer:
galina1969 [7]2 years ago
4 0
If something is melting or boiling

Endothermic reactions mean heat is added
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When 33 g of CaO and 10 g of H2O react, how many grams of calcium hydroxide would you expect to be produced* Explain your answer
MrMuchimi

Answer:

41.44 g

Explanation:

First of all, we must put down the equation of the reaction;

CaO + H2O ----->Ca(OH)2

Number of moles of CaO = 33g/56 g/mol = 0.59 moles

Number of moles of H20 = 10g/18 g/mol = 0.56 moles

Since the reaction is in 1:1 mole ration, H2O is the limiting reactant

Hence;

mass of Ca(OH)2 produced = 0.56 moles * 74 g/mol = 41.44 g

7 0
3 years ago
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When 2 molecules collide, what happens
shepuryov [24]
The answer is A! Hoped it’s sure!
Explanation: A chemical reaction involves breaking bonds in the reactants, rearranging the atoms into new groupings (the products), and forming new bonds in the products.

Hope I was able to help! Mark me brainly it would help a lot!
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3 years ago
As you move down through the family of alkali metals, the first ionization energy ________ because
kompoz [17]
I’m pretty sure the answer is B
5 0
2 years ago
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If water is added to a 0.70 molar solution of CuSO4 what will change
lana [24]

Answer:

B. Molarity will decrease

Explanation:

Molarity is one of the measures of the molar concentration of a solution. It is calculated by dividing the number of moles of the solute by the volume of the solvent. This means that the higher the amount of solute in relation to the volume of solvent, the higher the molarity of that solution.

In essence, adding water to a solution dilutes it i.e it increases the solvent's volume in relation to the solute, causing the molarity to decrease. In a nutshell, diluting a solution (by adding water or more solvent) causes the molarity of such solution to decrease. For example, if water is added to a 0.70 molar solution of CuSO4, the molarity of the solution will DECREASE.

7 0
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Wood and a cement block are considered to be transparent and are good conductors of electricity.
Tanzania [10]

Answer:

ITS FALSE electricity doesn't travel through wood same with cement!

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2 years ago
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