2 years ago

How you could use the scientific method to learn whether water really does take longer to boil if you are watching it.

Chemistry

1 answer:

Degger [83]2 years ago

6 0

Answer:

What you need is a thermometer and a clock.

Explanation:

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Which of the following descriptions

tangare [24]

Answer:

Explanation:

depending on the solid the shape will not change.

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2 years ago

When did the first particles of matter originate

Alisiya [41]

No one is 100% sure when particles of matter originated however scientist believe it had to be some time before the Big Bang

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2 years ago

How many moles of oxygen atoms do 1.5 moles of co2 contain?

IgorLugansk [536]

1 molecule CO2 has 2 atoms O.
1 mole CO2 has 2 moles O,
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2 years ago

What is my theoretical yield (in moles) of Potassium Bromide (KBr) if I start with 40 grams of Iron (II) Bromide [FeBr2]? moles

Verizon [17]

The reaction will be: FeBr2 + K --> KBr + Fe
Balancing gives: FeBr2 + 2K --> 2KBr + Fe
The molar mass of FeBr2 is 55.85 + 2*79.9 = 215.65 g/mol.
We divide 40 g / 215.65 g/mol = 0.185 mol FeBr2
Based on stoichiometry:
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4 0

3 years ago

-- A scientist combines 14 grams of potassium nitrate with an unknown amount of

igor_vitrenko [27]

Answer:

The unknown amount of potassium chloride is 13.6 grams.

Explanation:

The reaction of 14 grams of KNO₃ with KCl produces a total mass of 27.6 grams of the products.

The law of conservation of mass tells us that the total mass of the reactants must be the same that the total mass of the products. So, we can find the mass of KCl as follows:

$m_{r} = m_{p}$

Where <em>r</em> is for reactants and <em>p </em>is for products

$m_{KNO_{3}} + m_{KCl} = m_{p}$

$14 g + m_{KCl} = 27.6 g$

$m_{KCl} = 27.6 g - 14 g = 13.6 g$

Therefore, the unknown amount of potassium chloride is 13.6 grams.

I hope it helps you!

5 0

2 years ago