3 years ago

What is the definition of a catalyst?

Chemistry

1 answer:

aleksandrvk [35]3 years ago

7 0

Answer:

I think the best answer is (5) because catalyst are known to speed up a reaction without being changed

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What would happen if the aspects that allow to maintain the characteristics of the states were altered?

irinina [24]

An altered state of consciousness can be defined as any state of consciousness that deviates from normal waking consciousness, in terms of marked differences in our level of awareness, perceptions, memories, thinking, emotions, behaviours and sense of time, place and self-control.

Read more on Brainly.com - brainly.com/question/14823138#readmore

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2 years ago

What is the concentration of a solution that has 15.0 g NaCl dissolved to a total of 750 ml?

Oksana_A [137]

Answer: The concentration of solution is 0.342 M

Explanation:

To calculate the molarity of solution, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}$

We are given:

Mass of solute (Sodium chloride) = 15 g

Molar mass of sodium chloride = 58.5 g/mol

Volume of solution = 750 mL

Putting values in above equation, we get:

$\text{Molarity of solution}=\frac{15g\times 1000}{58.5g/mol\times 750mL}\\\\\text{Molarity of solution}=0.342M$

Hence, the concentration of solution is 0.342 M

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2 years ago

Explain the reaction of metals with water.

telo118 [61]

Answer:

it rusts

Explanation:

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3 years ago

How many trees must be harvested to treat one person

kirill115 [55]

There are 7 trees that have to be harvested

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3 years ago

When The appearance of a system changes does the mass of the system also change why why not

seropon [69]

No, because the appearance has nothing to do with system as well as the fact that appearance is only how it looks

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3 years ago

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