How to determine if a chemical equation is balancede or unbalanced?

A student finds an object with a mass of 64.5 g and a volume of 14 cm3. Find the density of the object. Could the object be gold? (10 pts.

Consider the following reaction at 298K. Zn2 + (aq) + Co (s) Zn (s) + Co2 + (aq) Which of the following statements are correct? Choose all that apply. K > 1 delta Go < 0 Eocell < 0 The reaction is reactant-favored. n = 4 mol electrons

In order for substances to dissolve in water, the substances should be bonded by: ionic bonds only covalent bonds only either ionic bonds or covalent bonds, which can hydrogen bond metallic or peptide bonds

Decide which element probably formed a compound with hydrogen that has a chemical formula most and least similar to the chemical formula of the compound formed by hydrogen and nitrogen

José and Laurel measured the length of a stick's shadow during the day. Without knowing the length of the stick, which of their measurements would you ask José and Laurel to examine more closely?

Unshared, or lone, electron pairs play an important role in determining the chemical and physical properties of organic compounds. thus, it is important to know which atoms carry unshared pairs.

What is the difference between a pure substance and a mixture?

Which statement describes a periodic trend of atomic radius? O A. It tends to decrease from left to right across a period. O B. It remains the same within a period. O c. It remains the same within a group. O D.

Bone tissue and fat tissue are examples of

What is the formula for hemoglobin?