If the heat involved in a chemical reaction has a negative sign,

A. heat is lost to the surroundings.

B. heat is gained from the surroundings.

C. no heat is exchanged in the process.

Red blood cells are formed by the in the center cavity of the bones. white cells, holes, capillaries, marrow x

The titration of 25.0 mL of an unknown concentration H2SO4 solution requires 83.6 mL of 0.12 M LiOH solution for complete neutralization. What is molarity (M) of the H2SO4 solution

What are lipids in the cell membrane.

How many moles of oxygen are in 3.30 moles of naclo4?

Give the word equation for the neutralization reaction of an acid and a base. Question 1 options: Acid + Base - -> Salt + Hydrogen Acid + Base - -> neutral solution Acid + Base - -> Salt + Hydroxide Acid + Base - -> Salt + Water

Giovanni created this chart to study for an exam. A 2-column table titled common ionic compounds. The first column labeled compound has entries sodium hydroxide (N a O H), iron oxide (F e O), calcium chloride (C a C l subscript 2), calcium carbonate

Consider the two electron arrangements for neutral atoms A and B. What is the difference between atom A and atom B? A - 1s22s22p63s1 B - 1s22s22p65s1 Atom B has lost some inner electrons.

Choose all the answers that apply. Which of the following has kinetic energy? rolling ball, moving car, book on a table, spinning top, or a falling tree.

Which of the following statements about the suns feature is true?

Preteins vary widely in structure, whereas nucleic acids have rather uniform structures. How do you account for this major difference?