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aliina [53]
3 years ago
10

What combines to form compounds? A. atoms of elements B. molecules C. minerals D. valences

Chemistry
2 answers:
hammer [34]3 years ago
8 0
D would be correct (i did this Assessment today)<span />
wlad13 [49]3 years ago
5 0

the correct answer would be

<u><em>A. atoms of elements </em></u>

i took the test

<em>please mark as brainliest </em>

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Calculate the vapor pressure of spherical water droplets of radius (a) 17 nm and (b) 2.0 μm surrounded by water vapor at 298 K.
Montano1993 [528]

Explanation:

Relation between pressure of water and its droplet is as follows.

           ln (\frac{p}{p_{o}}) = \frac{2 \gamma M}{r \rho RT}

where,   p = pressure of droplet

          p_{o} = water pressure in given temperature

          \gamma = 7.99 \times 10^{-3}

           M = Molecular Weight in Kg/Mol (0.018 for water)

            r = radius in meters

     \rho = density of water in Kg/m^{3} (1000 kg/m^{3})

           R = ideal gas constant (8.31)

           T = temperature in Kelvin

(a)   We will calculate the value of p as follows.

           p = e^{\frac{2 \gamma M}{r \rho RT}} \times p_{o}

              = e^{\frac{2 \times 0.07199 \times 0.018}{1.7 \times 10^{-8} \times 1000 \times 8.31 \times 298 K} \times 25.2

              = 26.8 torr

(b)  And, vapor pressure of spherical water droplets of radius 2.0 \mu m or 2 \times 10^{-6} m

             p = e^{\frac{2 \gamma M}{r \rho RT}} \times p_{o}

              = e^{\frac{2 \times 0.07199 \times 0.018}{2 \times 10^{-6} \times 1000 \times 8.31 \times 298 K} \times 25.2

              = 25.2 torr

7 0
4 years ago
Balanced equation for formation of potassium suberate from cyclooctene
hjlf

The balanced equations for the  formation of potassium suberate from cyclooctene are;

3KMnO4 + 3C8H18 + 4H2O --> 3C8H17(OH)2 + 2MnO2 + 2KOH and

3C8H14(OH)2 +  6KMnO4 ----> 3KCOO(CH2)6 COOK + 6MnO2 + 6H20

<h3>What is potassium suberate ?</h3>

The compound potassium suberate  is obtained from cyclooctene. The first step in the process is the oxidation of cyclooctene using potassium permanganate as follows;

3KMnO4 + 3C8H18 + 4H2O --> 3C8H17(OH)2 + 2MnO2 + 2KOH

This is followed by the production of potassium suberate from the reaction equation;

3C8H14(OH)2 +  6KMnO4 ----> 3KCOO(CH2)6 COOK + 6MnO2 + 6H20

Learn more about potassium suberate: brainly.com/question/8507057?

5 0
2 years ago
What is the main basis for the classification system they chose?
VARVARA [1.3K]
What classification system????
3 0
4 years ago
Which atom will gain electrons in the reaction, and how many.
Anna35 [415]

Answer:

Most atoms do not have eight electrons in their valence electron shell. Some atoms have only a few electrons in their outer shell, while some atoms lack only one or two electrons to have an octet. In cases where an atom has three or fewer valence electrons, the atom may lose those valence electrons quite easily until what remains is a lower shell that contains an octet. Atoms that lose electrons acquire a positive charge as a result because they are left with fewer negatively charged electrons to balance the positive charges of the protons in the nucleus. Positively charged ions are called cations. Most metals become cations when they make ionic compounds.

Explanation:

yan na answer

7 0
3 years ago
Most immigrants from the 1820 to 1850 came from which two countries? France and the United Kingdom Ireland and Germany Ireland a
Vera_Pavlovna [14]
Ireland and germany!!
5 0
4 years ago
Read 2 more answers
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