1. What is the atmospheric layer responsible for long-distance radio communication?

Question 1 options:

Troposphere

Stratosphere

Exosphere

Thermosphere

Which is the most important factor in determining the state of a substance? A. the size of the atoms in a substance B. the number of molecules in a substance C. the position of the electrons on the outer valence shells D.

When 10.0 g of lead are heated with 1.6 g of sulfur, 11.6 g of lead sulfide are formed. how many grams of lead sulfide form when 10.0 g of lead are heated with 3.0 g of sulfur?

Groundwater moves from the ground through plants and then back into the atmosphere through the process of D) transpiration.

The "normal" lead content in human blood is about 0.40 part per million (i. e., 0.40 g of lead per million grams of blood). A value of 0.80 part per million (ppm) is considered to be dangerous. How many grams of lead are contained in 6.

The number of objects in a mole is so fantastically large as to be incomprehensible from everyday experience. If a mole of ice cubes (each 1 in^3) were stacked neatly edge to edge over the entire continental United States (area = 3.

Give 3-5 pieces of evidence to support why cloning is bad.

Nitrogen combines with oxygen to form nitrogen monoxide (no) and nitrogen dioxide (no2). a sample of no consists of 1.14 g of oxygen and 1 g of nitrogen.

The modern periodic table reflects many improvements to Mendeleev's original table. If Mendeleev's table was incorrect, why is it still studied in chemistry classrooms today?

Good evening everyone, I just wanted to know who's willing to talk to me

Explain how the nettle is adapted for defence and protection