What does the plus mean next to an element

Nitrogen atoms are part of the structure of some organic molecules, such as all amino acids and some modified carbohydrates. What other organic molecules contain nitrogen?

What is the standard equation for calculating molar mass?

Which of the following processes does NOT occur in both plant and animal cells? A: photosynthesis B: Anaerobic respiration C: Aerobic respiration D: Cellular respiration

1 arsenic atom is 6.24 times heavier than one carbon atom (12) thus arsenic has the Atomic mass of what?

Prepare approximately. 1n hcl by putting the correct amount of concentrated acid in a glass bottle and

Which statement best explains why elements are matter? An element is a physical substance that has mass and takes up space. Elements are pure substances that cannot be divided chemically. Each element is a pure substance composed of one type of atom.

Which of the following best describes what causes the phases of the moon? The alignment of the sun, Earth, and moon The speed of the moon around the Earth The speed of the Earth around the sun The alignment of the planets

At which temperature would atoms of a He (g) sample have the greatest average kinetic energy? (1) 25°C (3) 273 K (2) 37°C (4) 298 K

In the reaction, HCl + H2O produces H3O + Cl, what is the conjugate acid

Draw the curved arrow mechanism for the conversion of aniline into benzenediazonium ion, and draw the final product that forms after the benzenediazonium ion is treated with