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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 plant chemical which absorbs sunlight and helps make cell food is

UkoKoshka [18]

Answer:

chlorophyll

Explanation:

8 0

3 years ago

How many Joules must be removed to condense 150.0g of steam at 100.0 degrees Celsius to water at 100.0 degrees celcius

Elina [12.6K]

Answer:

339kJ

Explanation:

Given parameters:

Mass of steam = 150g = 0.15kg

Initial temperature of steam = 100°C

Final temperature of water = 100°C

Unknown:

Quantity of heat that must be removed to condense the steam = ?

Solution:

The heat involved here is a latent heat because there is no change temperature. The process is just a phase change.

H = mL

m is the mass

L is the latent heat of vaporization = 2,260 kJ/kg

Insert the parameters and solve;

H = 0.15kg x 2,260 kJ/kg

H = 339kJ

7 0

3 years ago

The isotope 106 46Pd (106 on top and 46 on bottom)

vazorg [7]

Answer:

4. 60 neutrons.

Explanation:

The given isotopes;

¹⁰⁶₄₆Pd

In this isotope, we can deduce that the mass number is the superscript and the atomic number is the subscript;

Mass number = 106

Atomic number = 46

Mass number is the number of protons and neutrons in an atom;

Mass number = Protons + neutrons

Atomic number is the number of protons

So, Number of protons = 46

Number of neutrons = Mass number - Atomic number

= 106 - 46

= 60

Number of neutrons = 60

7 0

3 years ago

In a laboratory experiment,john uses a mesh to separate soil particles from water.what technique of separation is he using?

loris [4]

John is using Filtration

6 0

3 years ago

A chemist must dilute of aqueous sodium carbonate solution until the concentration falls to . He'll do this by adding distilled

Mademuasel [1]

The question is incomplete, complete question is :

A chemist must dilute 73.9 mL of 400 mM aqueous sodium carbonate solution until the concentration falls to 125 mM . He'll do this by adding distilled water to the solution until it reaches a certain final volume. Calculate this final volume, in liters. Be sure your answer has the correct number of significant digits.

Answer:

The final volume of the solution will be 0.236 L.

Explanation:

Concentration of sodium carbonate solution before dilution = $M_1= 400 mM$