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defon
2 years ago
15

What kind of a system is a coffee held in a cup??​don't spam..

Chemistry
2 answers:
trasher [3.6K]2 years ago
7 0

<h2>Open system.</h2>

Explanation:

<h3>Hope it helps you!! </h3>
bagirrra123 [75]2 years ago
3 0

Answer:

open system

Coffee held in a cup is an open system because it can exchange matter water vapors and energy heat with the surroundings.

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What is carboxylic acid?​
maksim [4K]

Answer:

Carboxylic acid

A carboxylic acid is an organic acid that contains a carboxyl group attached to an R-group. The general formula of a carboxylic acid is R−COOH or R−CO₂H, with R referring to the alkyl, alkenyl, aryl, or other group. Carboxylic acids occur widely. Important examples include the amino acids and fatty acids.

7 0
3 years ago
How many moles (of molecules or formula units) are in each sample? 79.34 g cf2cl2?
Alona [7]
From the periodic table:
molecular mass of carbon = 12 grams
molecular mass of fluorine = 18.99 grams
molecular mass of chlorine = 35.5 grams
Therefore:
one mole of CF2Cl2 = 12 + 2(18.99) + 2(35.5) = 120.98 grams
Therefore, we can use cross multiplication to find the number of moles in 79.34 grams as follows:
mass = (79.34 x 1) / 120.98 = 0.6558 moles

Now, one mole contains 6.022 x 10^23 molecules, therefore:
number of molecules in 0.65548 moles = 0.6558 x 6.022 x 10^23
                                                              = 3.949 x 10^23 molecules
7 0
3 years ago
U
guapka [62]

Answer:

fluoride ion with a charge of -1

Explanation:

If a fluorine atom gains an electron, it becomes a fluoride ion with an electric charge of -1.

4 0
3 years ago
What do greenhouse gases (CO2) do to the atmosphere?
Alborosie

Answer:

they causes climate change by trapping heat and also they contribute to respiratory diseases from smog and air pollution

4 0
3 years ago
Read 2 more answers
The number of moles of solute in 200.ml of a 0.500 m solution is
IrinaK [193]

Answer:

I believe the answer is 0.100.

Explanation:

Hope my answer has helped you!

8 0
3 years ago
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