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sergey [27]
3 years ago
7

What must be true for a substance to be able to dissolve in water?

Chemistry
1 answer:
zvonat [6]3 years ago
3 0

In order for a solute to dissolve in a solvent, the attractive forces between solute particles and the solvent particles must be stronger than the attractive forces between solute-solute and solvent-solvent particles. This is important so that the solute will remain in solution.

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How many atoms of phosphorus are in 7.00 mol of copper(II) phosphate?
Rama09 [41]

<u>Answer:</u> The number of phosphorus atoms in given amount of copper(II) phosphate is 8.431\times 10^{24}

<u>Explanation:</u>

We are given:

Moles of copper(II) phosphate Cu_3(PO_4)_2 = 7.00 mol

1 mole of copper(II) phosphate contains 3 moles of copper, 2 moles of phosphorus and 8 moles of oxygen atoms

Moles of phosphorus in copper(II) phosphate = (2\times 7.00mol

According to the mole concept:

1 mole of a compound contains 6.022\times 10^{23} number of particles

So, 7.00 moles of copper(II) phosphate will contain = (2\times 7\times 6.022\times 10^{23}=8.431\times 10^{24} number of phosphorus atoms.

Hence, the number of phosphorus atoms in given amount of copper(II) phosphate is 8.431\times 10^{24}

3 0
3 years ago
When conducting a medication house cleaning, and after sorting all of the client's drugs into two groups (drugs currently being
dexar [7]
The correct option is B.
After sorting the drugs into two groups, it is very important to check with the client, who is the one using the drugs, in order to ensure that the drugs have been properly sorted and no mistake was made. After ensuring that the drug has been accurately sorted then the ones that the client is no longer using can be put away in an appropriate safe location in order to avoid mix up.
4 0
3 years ago
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2 H2O2(aq)-&gt; 2H20(l) + O2(g) ΔΗ -196 kJ/molrun The decompostion of H202(aq) is represented by the equation above. A student m
Aleks [24]

Answer:

the approximate pressure in the flask after 400. s = 1.2atm

Explanation:

The detailed explanation is shown below

5 0
3 years ago
Determine the amount of heat energy in joules required to raise the temperature of 7.40g of water from 29.0OC to 46.0 OC.
valina [46]

Answer: The amount of heat energy in joules required to raise the temperature is 526 Joules

Explanation:

The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.

Q=m\times c\times \Delta T

Q = Heat absorbed = ?

m= mass of substance = 7.40 g

c = specific heat capacity = 4.184J/g^0C

Initial temperature of the water = T_i = 29.0°C

Final temperature of the water = T_f  = 46.0°C

Change in temperature ,\Delta T=T_f-T_i=(46.0-29.0)^0C=17.0^0C

Putting in the values, we get:

Q=7.40g\times 4.184J/g^0C\times 17.0^0C

Q=526J

The amount of heat energy in joules required to raise the temperature is 526 Joules

4 0
3 years ago
In the teapot dome scandal, what did the secretary of the interior albert fall lease
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Albert Fall secretly leased federal oil reserves for personal gain.
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