Match element to how many valence electrons it has

Al S Na

Si Mg P

4

5

3

6

2

La massa d'una molècula de glucosa (C6H12O6) és:

A potassium isotope has a half-life of 1.25 billion years. Given that scientists estimate Earth's age to be 4.

Suppose an error in transcription causes threonine (Thr) to be incorporated into the variable region of an antibody instead of arginine (Arg). Which of these could describe the error ACG was transcribed instead of AGC.

A 20 N force is applied to an object with a mass of 100 kg. What is the acceleration of the object? O O A. 0.2 m/s2 B. 120 m/s. 120 m/s2 O C. 80 m/s. 120 m/s2 O D. 5 m/s. 120 m/s2

Which sample is a pure substance? a test tube of zinc oxide a container of zinc and oxygen a flask of pond water a jar of soilWhich sample is a pure substance?

What would happen if you tried to sqeeze a gas into a smaller container?

Paint, paint thinners and some cleaning agents can weaken the shell of a hard hat and may eliminate

A 10 chunk of metal has a specific heat of 0.25 J/g ºC. The temperature is changed from 10ºC to 45ºC. How much heat is required?

In this reaction what is the correct coefficient for sodium chloride? pb (no3) 2? nacl → pbcl2? nano3

Classify each of the following as a path function or a state function. work energy distance traveled enthalpy heat