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2 years ago

An accepted and universally true explanation of observed facts is a

Chemistry

1 answer:

Mekhanik [1.2K]2 years ago

5 0

An accepted and universally true explanation of observed facts is a law.

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A solid mixture consists of 47.6g of KNO3 (potassium nitrate) and 8.4g of K2SO4 (potassium sulfate). The mixture is added to 130

IgorLugansk [536]

Answer: No crystals of potassium sulfate will be seen at 0°C for the given amount.

Explanation:

We are given:

Mass of potassium nitrate = 47.6 g

Mass of potassium sulfate = 8.4 g

Mass of water = 130. g

Solubility of potassium sulfate in water at 0°C = 7.4 g/100 g

This means that 7.4 grams of potassium sulfate is soluble in 100 grams of water

Applying unitary method:

In 100 grams of water, the amount of potassium sulfate dissolved is 7.4 grams

So, in 130 grams of water, the amount of potassium sulfate dissolved will be $\frac{7.4}{100}\times 130=9.62g$

As, the soluble amount is greater than the given amount of potassium sulfate

This means that, all of potassium sulfate will be dissolved.

Hence, no crystals of potassium sulfate will be seen at 0°C for the given amount.

7 0

2 years ago

Because of river discharge, large changes in ocean salinity often occur __.

Lorico [155]

I’m guessing it would be A because the river discharge tends to gather near coastlines where the river ends

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3 years ago

7. Iron combines with 4.00 g of Copper (11) nitrate to form 6.01 g of Iron (I) nitrate and 0.400 g copper

olga55 [171]

Answer:

222325332

Explanation:

4 0

2 years ago

Read 2 more answers

which of the following pairs of elements could react to form an ionic compound? A. potassium and calcium B. sulfur and oxygen C.

Grace [21]

The correct option is FLUORINE AND COPPER.
An ionic compound is usually formed by the combination of a metal and a non metal, the metal usually act as an electron donor while the non metal act as an electron acceptor. Thus, in ionic compounds, there is total transfer of electrons from the metal to the non metal. In the question given here, copper is the metal while the fluorine is the non metal.

4 0

2 years ago

When planning a simple experiment, what does it mean to “test one variable”?

SSSSS [86.1K]

Answer:

I believe the answer is "b". "During the experiment, the scientist has only one element, or variable, that is changed to test the hypothesis."

Explanation:

I remember from last year but I'm not totally sure. Good luck!

3 0

2 years ago