Determine the mechanical energy of this object:

a 1-kg ball rolls on the ground at 2m/s

Although cholesterol is a hydrophobic molecule, it has a hydrophilic head group like all other membrane lipids. True or false?

Calcium (Ca) has an atomic number of 20. What is calcium's ground-state electron configuration? 1s21p61d101f2 1s21p62s22p63s23p2 1s22s22p63s23p64s2 1s22s22p63s23p63d2

Select all of the following equations that represent an exothermic reaction. NH3 (g) + 12.0 kcal → ½N2 (g) + 3/2 H2 (g) C (graphite) → C (diamond), ΔH = - 0.

What does percent composition tell you about a substance

Which of the following statements regarding resonance structures is true? 1) They differ only in their arrangement of electrons. 2) The true structure is a hybrid of possible resonance structures.

Two pieces of silk have an electric charge after being rubbed on a piece of amber. What will happen when the two silk pieces are brought close together? A. They will repel one another. B. They will attract one another. C.

The chemicals formula of glucose is c6h12o6. what are the names of the elements in glucose and how many atoms of each element are present in glucose molecules

When K-37 undergoes positron emission, what is the resulting atom? A) K-37 B) K-38 C) Ar-37 D) Ar-38

Consider the following reaction where Kp = 4.55*10-5 at 723 K: N2 (g) + 3H2 (g) ⇋ 2NH3 (g) a) If the three gases are mixed in a rigid container at 723 K so that the partial pressure of each gas is initially one atm, what will happen?

Which terms are used to identify pure substances? (1) an element and a mixture (2) an element and a compound (3) a solution and a mixture (4) a solution and a compound