Which statement describes a chemical property of silicon?

A) Silicon has a blue-gray color.

B) Silicon is a brittle solid at 20.°C.

C) Silicon melts at 1414°C.

D) Silicon reacts with fluorine.

Identify the type of hybrid orbitals present and bond angles for a molecule with a tetrahedral shape

What are particles of carbon that enter the air when wood or coal are burned?

Gold has a density of 0.01932 kg/cm3. What volume (in cm3) would be occupied by a 33.3 get sample of gold?

3 Ca + 2 AICI3 + 3 CaCl2 + 2 AI If you react 100. grams of aluminum chloride with excess calcium, how many grams of calcium chloride are produced?

How can frogs be amongst the most diverseanimals in the world

How many moles of solute are contained in a 250 ml solution that has a concentration of. 85 m? A) 210 B) 0.21 C) 3.4 D) 0.29 E) 0.85

Classify the bonds formed between each pair as ionic, polar covalent, or nonpolar covalent based solely on each element's position on the periodic table. O-O, Fe-O, Al-N, O-I, S-I, Br-Br, P-Br, Be-Cl

If one starts with pure NO2 (g) at a pressure of 0.500 atm, the total pressure inside the reaction vessel when 2NO2 (g) 2NO (g) + O2 (g) reaches equilibrium is 0.674 atm. Calculate the equilibrium partial pressure of NO2.

What kind of reproduction does this organism use?

In hunans gestation normally occurs while developing organusm in the