The nucleus of an atom can have either a positive or negative charge

Answer:

See explanation

Explanation:

The question is incomplete. However, base on the given information, one likely question could be that, we calculate the the volume of the nitrogen gas after heating it.

So, we have that:

Initial Volume, V1 = 200mL

Initial Temperature, T1 = 24k

Final Temperature, T2 = 47k

To solve the final volume of the gas, we apply the following ideal gas law equation

V1 * T1 = V2 * T2

Substitute values for V1, T1 and T2

200mL * 24K = V2 * 47K

200mL * 24 = V2 * 47

4800mL = 47V2

Solve for V2

V2 = 4800/47

V2 = 102.13 mL ------- Approximated

Hence, the volume of nitrogen gas after heating is 102.13mL

The best statement among the following which explains whether alchemy is a science or pseudoscience is "It is pseudoscience because each metal is known to be a unique element." Hence, Option (D) is correct.

What is Alchemy ?

Alchemy began to fully evolve into chemistry in the 17thcentury, with a greater emphasis on rational thought and experimentation and less emphasis on spirituality and mysticism.

The alchemists were never successful in changing lead into gold, but modernnuclear physics can accomplish this task.

Therefore , The best statement among the following which explains whether alchemy is a science or pseudoscience is "It is pseudoscience because each metal is known to be a unique element." Hence, Option (D) is correct.

Learn more about Alchemy here ;

brainly.com/question/5997100

#SPJ2

The answer to your question is D. none of the above. Ionic compounds are compounds composed of ions, charged particles that form when an atom (or group of atoms) gains or loses electrons. (A cation is a positively charged ion; an anion is a negatively charged ion.) Covalent or molecular compounds form when elements share electrons in a covalent bond to form molecules. I hope this helps.

Answer:

The answer is C. a metal and a nonmetal.

Explanation:

A covalent compound is formed when an element shares its valence electron with another element. This bond is formed between two non metals.  Example:

An ionic compound is formed when one element completely transfers its valence electron to another element. The element which donates the electron is known as electropositive element and the element which accepts the electrons is known as electronegative element. This bond is formed between a metal and an non-metal.  Example:

Thus an ionic compound is typically made of a metal and a nonmetal.

Answer: The correct answer is option 4.

Explanation:

According to the reaction, 1 mol of is obtained from 2 moles of C gives

Then, 2 moles of will be obtained from:

moles of C =4 moles

Hence, the correct answer is option 4.

Answer:

The answer to your question is below

Explanation:

1) 0.143g of Mg into atoms

- Look for the atomic number of Magnesium in the Periodic table              

Atomic number = 24.31 g

-Use the Avogadro's number to find the number of atoms

                          24.31g ------------------- 6.023 x 10²³ atoms

                           0.143 g -----------------  x

                           x = (0.143 x 6.023 x 10²³) / 24.31

                           x = 8.613 x 10²² / 24.31

                           x = 3.54 x 10²¹ atoms

2) 0.101 kg of Ti into atoms

-Look for the atomic number of Titanium in the Periodic table

Atomic number = 47.87 g

-Use the Avogadro's number to find the number of atoms

                      47.87 g --------------------- 6.023 x 10²³

                      101 g    ----------------------  x

                       x = (101 x 6.023 x 10²³) / 47.87

                       x = 6.08x 10²⁵ / 47.87

                      x = 1.27 x 10²⁴ atoms