The flame symbol represents which of the following hazards?

fire hazard

heat hazard

electrical hazard

explosive hazard

Which definition is correct? A. A physical change creates a new substance because bonds are broken or formed B. A chemical change occurs when the substance remains the same but the shape, or other physical characteristics change C.

Select all that apply. The rate law for the reaction 2NO (g) + CU (g) rightarrow 2NOCl (g) is given by R =

Made up of groups 1,2 and 13,18

Which is used to convert between mass and moles of a substance?

19. B is the chemical symbol of which element? Boron Boring Balkite Beryllium 20. Zinc (Zn) has an atomic number of 30 and an atomic mass of 65. How many neutrons does a stable atom of Zn have? 30 35 60 95

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?

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Explain how the nettle is adapted for defence and protection