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bearhunter [10]
3 years ago
14

Using salt and ice to make ice cream is an example of:

Chemistry
1 answer:
olganol [36]3 years ago
3 0

Answer:

An exothermic reaction

Explanation:

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Neeru is looking at her kids backpack and wants to compare their masses. What is the best tool Neeru can use to find the mass of
lisov135 [29]
B would be the best to measure mass
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3 years ago
Which is the limiting reactant if we start with 30.0 g Al and 30.0 h O2​
lorasvet [3.4K]

Al

Explanation:

The limiting reactant will be Al:

        4Al + 3O₂ → 2Al₂O₃

The limiting reactant is the reactant in short supply in a chemical reaction.

     Given parameters:

  Mass of Al = 30g  Molar mass = 27g/mol

         Number of moles = \frac{mass}{molar mass} =  \frac{30}{27}

         Number of moles of Al = 1.111 mole

  Mass of O₂ = 30g, molar mass = 32g/mol

   Number of moles =  \frac{30}{32} = 0.94mol

In the reaction:

          4 moles of Al reacted with 3 moles of O₂

         1.11moles of Al will require \frac{1.11 x3}{4} = 0.83mole to react

But we have been given 0.94mole of O₂. This is more than required.

Therefore O₂ is in excess and Al is the limiting reactant.

Learn more:

Limiting reagents brainly.com/question/6078553

#learnwithBrainly

4 0
3 years ago
13. Which statements about isotopes of the same element are correct? !
madreJ [45]

Answer:

B

Explanation:

They are atoms which have the same chemical properties because they have the

same number of electrons in their outer shell.

They are atoms which have the same number of electrons and protons but different

numbers of neutrons.

8 0
2 years ago
Besides filament-based detectors, what else are sometimes used to find flammable liquids?
Anettt [7]

Answer:

D

Explanation:

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6 0
3 years ago
A student used 10 mL water instead of 30mL for the extraction of the NaCl from the mixture. How would this affect the calculated
leonid [27]
In this problem, the solute is sodium chloride, the salt while the solvent which comprise of a larger mass in the solution is water. When the solvent volume is decreased which is related to its mass, with the solute mass being held constant, then the concentration of salt increases. This is called concentration method. 
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3 years ago
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