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3 years ago

Which statement is true with respect to an atom?

2 answers:

7 0

The atomic number of an atom is equal to the number of protons.

The atomic number represents the equal number of protons and electrons in an element.

Elena-2011 [213]3 years ago

6 0

The atomic number represents the equal number of protons and electrons in an element. Hope i helped

Cheers,
Belive1234

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Is 4atm to big of a difference to get when I use the ideal gas law vs the van der waals equation?

garik1379 [7]

This absolute amount of pressure does not play a significant difference.

At high temperatures and low pressures, its results deviate too little.

But at low temperatures and high pressures, it will change significantly and this difference will change from gas to gas.

In the image you can see the difference between some results from both equations.

4 0

3 years ago

What object has 13 protons

bekas [8.4K]

Answer:

The isotope Al-27 has 13 protons

Explanation:

5 0

4 years ago

Fernando places 50 mL of HCl in a 100 mL beaker and 50 mL of NaOH in a 100 mL beaker. he places them on a scale together and mea

olchik [2.2K]

Answer:

The correct options are:

B. The HCl is the solute.

D. The H₂O is the solvent.

E. This mixture conducts electricity.

Explanation:

For the preparation of the HCl solution, 10 mL of HCl and 40 mL of water were mixed.

The compound that is present in the solution in a smaller ratio is the solute and the other compount -present in higher ratio- is the solvent.

So, the solute is HCl and the solvent is water (H₂O). Furthermore, water is considered as an universal solvent (for most of the polar and ionic compounds). According to this, the following options are correct:

B. The HCl is the solute.

D. The H₂O is the solvent.

Then, a condition for a solution that is able to conduct electricity is the presence of ions in the solution. When HCl is dissolved in water, it dissociates in ions according to the following equilibrium:

HCl ⇔ H⁺ + Cl⁻

The ions H⁺ and Cl⁻ are electrically charged so the solution can conduct electricity. According to this, the following option is also correct:

E. This mixture conducts electricity.

7 0

3 years ago

Isotopes ____________ the atomic mass of an element because they have a ____________ number of neutrons. a. disregard, constant

3241004551 [841]

Is B. The number of the atomic mass can increase or decrease because the number of neutrons is different.

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3 years ago

10 POINTS The equations are not balanced. Which equation would have the same coefficients in the same order as 2CO2 + 3H20 C2H6O

Mama L [17]

Answer:

Al + FeO → Al2O3 + Fe

Explanation:

4 0

3 years ago

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