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2 years ago

What is the first thing you must do to solve a stoichiometry problem

Chemistry

1 answer:

belka [17]2 years ago

3 0

Answer:

the first step in any stoichiometric problem is to always ensure that the chemical reaction you are dealing with is balanced,

Explanation:

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The compound represented by this formula can be classified as an

levacccp [35]

Answer:

It depends what formula you are talking about.

Explanation:

please further explain so I can be sure.

5 0

3 years ago

The jet stream is one of the key winds that moves air masses. in which direction does the jet stream in the united state general

OleMash [197]

The jet stream is one of the key winds that moves air masses at the direction from west to east it moves.

<h3>What are jet streams?</h3>

Jet streams are strong winds which are flow in the form of narrow bands in the upper part of the atmosphere. On the earth these winds are flows near the altitude of the tropopause. These winds carries weather systems and blows toward the colder northern air and due to the rotation of earth, its direction is from west to east.

Hence jet streams move winds from west to east direction.

To know more about jet streams, visit the below link:
brainly.com/question/791542

7 0

2 years ago

A substance that does not allow x-rays to pass through is described as being

horsena [70]

A substance that is impenetrable by x-rays is described as being radiopaque.

Radiopaque substances will not allow x-rays and or other forms of radiations to pass through them.

Instead, they absorb or block the rays and when used in radiology, they appear white or light gray on photographic films.

Radiopaque materials are applied in generating ultrasound images and other forms of clinical procedures.

More on radiopaque materials can be found here: brainly.com/question/10583205?referrer=searchResults

8 0

2 years ago

A solution of LiCl in water is 20.0 wt% LiCl. What is the mole fraction of LiCl?0.09600.4720.1064.44

Tresset [83]

Answer:

mole fraction of LiCl = 0.096

Explanation:

Weight percentage -

weight percentage of A is given as , the weight of the substance A by weight of the total solution multiplied by 100 .

i.e.

weight % A = weight of A / weight of solution * 100

GIven ,

20.0 wt% LiCl

Now ,

Assuming weight of solution = 100 g ,

weight if LiCl = 20.0 g

Since ,

Moles is denoted by given mass divided by the molecular mass ,

Hence ,

n = w / m

n = moles ,

w = given mass ,

m = molecular mass .

From the question ,

molar mass of LiCl = 42.39 g/mol

moles of LiCl = mass / molar mass = 20.0 g / 42.39 g/mol = 0.472 mol

Since , solution = 100 g ,

and ,

Solution = solute + solvent

100g = 20g + solvent

Solvent = 80 g

mass of water = 80 g

water molecular mass = 18 g/mol

moles of water = 80g / 18 g/mol = 4.44 mol

Mole fraction -

It is the ratio of the moles of one of the component of the solution by the mole of the solution .

Total moles of the solution = moles of the solute + moles of solvent

Total moles of the solution = 0.472 mol + 4.44 mol = 4.92 mol

Now ,

mole fraction of LiCl = moles of LiCl / total moles = 0.472 mol / 4.92

mole fraction of LiCl = 0.096

3 0

3 years ago

Convert 3.00 * 10 ^ 26 molecules of carbon dioxide gas at STP to L.

Bond [772]

Answer: 1. The coefficient is 1.12

2. The exponent is 4

3. There are 3 significant digits

4. The rightmost significant figure is 2.

Explanation:

Scientific notation is defined as the representation of expressing the numbers that are too big or too small and are represented in the decimal form with one digit before the decimal point times 10 raise to the power.

For example : 5000 is written as $5.0\times 10^3$