What allows valence electrons in metals to move throughout the metal?

What is the total number of calories of heat energy absorbed by 15 grams of qater when it is heated from 30C to 40C?

Dmitri mendeleev's periodic law states that chemical and physical properties repeat themselves in groups of?

What happens as blood passes through the capillaries in the small intestine

Which of the following best describes acid anhydrides?

What applies to the collision theory? -Particles need to collide in order to react. -Particles may obtain successful collisions in any molecular orientation. -Temperature increase causes kinetic energy of particles to decrease.

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