How many neutrons does element X have if its atomic number is 25 and its mass number is 72?

How do you do mole conversions

The pk1, pk2, and pkr for the amino acid glutamate are 2.1, 9.5, and 4.1, respectively. at ph 11.0, glutamate would be charged predominantly as follows:

Describe how light waves interact with the clothes you are wearing and your eyes.

What trend in electronegativity do you see as you go down a group/family on the periodic table?

When a 3.00 g 3.00 g sample of KBr KBr is dissolved in water in a calorimeter that has a total heat capacity of 1.36 kJ ⋅ K - 1, 1.36 kJ⋅K-1, the temperature decreases by 0.370 K. 0.370 K. Calculate the molar heat of solution of KBr. KBr.

Heat that flows by conduction is the transter of thermal energy between substances in contact. What must occur for this to happen? The two systems must be the same temperature, The two systems must not be touching each another.

What piece of information connects mass and moles?

What relationship can be seen in an element's placement within a group and its electron configuration?

Which of the following is true concerning atoms? A. Atoms are made of even smaller substances called subatomic particles B. The properties of atoms cannot be measured or observed

Intermolecular forces as a whole are also known as