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2 years ago

In stoichiometric calculations, which quantity MUST be used to convert from one chemical substance to another?

Chemistry

1 answer:

Cloud [144]2 years ago

4 0

The answer is

C) mole ratio

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A 40.5 g sample of aluminum is cooled 7.5°C. The specific heat capacity of aluminum is

sweet-ann [11.9K]

Q=mc\Delta T
Q= 40.5g x 0.900 J/g degree Celsius x 7.5
Q= 273.4 J.
Even if it is cooled , we use the same temperature as heating it.

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2 years ago

Sugar crystals aren't very big when they stop growing. how could you make bigger sugar crystals?

hram777 [196]

DONT GIVE THEM WATER OR HEAT

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2 years ago

Hands on mole activity

Amanda [17]

Explanation:

one mole= 6.02x10^23

Everything going from a mole will always be multiplied and everything going into mole will be divided.

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3 years ago

for 2Na (s) +Cl2(g)->2NaCl(s) how many grams of sodium chloride will be made from 115 g of sodium metal when when reacted wit

alexandr1967 [171]

The grams of sodium chloride that will be made is 292.5 g

<u><em>calculation</em></u>

2Na +Cl₂ → 2NaCl

step 1: calculate the moles of Na

moles = mass/molar mass

From periodic table the molar mass of Na = 23 g/mol

moles = 115 g/23 g /mol = 5 moles

Step 2 : use the mole ratio to determine the moles of NaCl

Na:NaCl is 2:2 = 1:1 therefore the moles of NaCl is also= 5 moles

Step 3: find the mass of NaCl

mass= moles x molar mass

The molar mass of NaCl = 23 + 35 .5 =58.5 g/mol

mass= 5 moles x 58.5 g/mol =292.5 g

5 0

2 years ago

The diagram shows light interacting with an object. Which object is the light most likely striking?

Tamiku [17]

a window

Explanation:

The diagram attached that shows light interacting with an object shows that the object is most definitely a window.

The window must have been made up of glass.

The wave path completely describes refraction of waves as they cross the boundary between two medium.
The light moves from a less dense to a denser medium and this causes the velocity to slow down.
On coming from the other side, the wave rays are attenuated.

learn more:

Refraction brainly.com/question/12370040

Reflection and diffraction brainly.com/question/3183125

#learnwithBrainly

6 0

2 years ago

Read 2 more answers