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irga5000 [103]
3 years ago
5

Can someone help me please? (attached pic)

Chemistry
1 answer:
LenaWriter [7]3 years ago
6 0
The answer is D, do you want me to show you how?
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During an experiment, 321.1 grams of strontium phosphite are measured into a beaker. How many moles of strontium phosphite are i
Allushta [10]

321.1 g of strontium phosphite will contain 0.76 moles of strontium phosphite in the beaker.

<u>Explanation:</u>

It is known that 1 mole of any substance is equal to the molar mass of that substance. So for the case of strontium phosphite, the molar mass is found to be 420.8 g/mol.

This means 1 mole of Strontium phosphite will contain 420.8 g of strontium phosphite.

Then 1 g of strontium phosphite will have \frac{1}{420.8} moles of strontium phosphite.

So, 321.1 g of strontium phosphite will contain \frac{321.1}{420.8}=0.76 moles

Thus, 321.1 g of strontium phosphite will contain 0.76 moles of strontium phosphite in the beaker.

5 0
3 years ago
Arranges the following molecules in order of increasing dipole moment: <br> H2O, H2S, H2Te, H2Se.
erastova [34]

Explanation:

Dipole moment is defined as the measurement of the separation of two opposite electrical charges.

H_{2}O is a bent shaped molecule with a dipole moment of 1.87.

H_{2}S is also a bent shaped molecule with a dipole moment of 1.10.

H_{2}Te is a also a bent shaped molecule and has a negligible dipole moment.

H_{2}Se has a dipole moment of 0.29.

Therefore, given molecules are arranged according to their increasing dipole moment as follows.

        H_{2}Te < H_{2}Se < H_{2}S < H_{2}O

7 0
4 years ago
Generally speaking, an element with a large atomic radius will have a low ionization energy. True or false ?
algol [13]

Answer:

True

Explanation:

Large atoms or molecules have low ionization energy, while small molecules tend to have higher ionization energies.

The ionization energy is different for electrons of different atomic or molecular orbitals.

8 0
3 years ago
If the [H+] of a solution is 0.001 mol/L what is the pH? <br> A. 12<br> B. -2 <br> C. 1 <br> D.2
erma4kov [3.2K]

Answer:

pH = 3 (though the option is missing)

Explanation:

We have a solution with a concentration of the hydrogen ion, [H⁺] = 0.001 mol/L = 0.001 M. We can calculate the pH using its definition.

pH = -log [H⁺]

pH = -log 0.001

pH = 3

Since the pH < 7, the solution is acid. Other way to recognize that a solution is acid is when [H⁺] > 10⁻⁷ M at 25°C.

4 0
3 years ago
Gravitational potential energy is the energy something contains due to its ________ the Earth.
natita [175]
I believe this answer will be A<span />
8 0
3 years ago
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