Which of the following elements is a metalloid?

A. gold

B. sulfur

C. silicon

D. aluminum

How many protons are in the nucleus of an atom in beryllium

A piece of wood near a fire is at 23°C. It gains 1,160 joules of heat from the fire and reaches a temperature of 42°C. The specific heat capacity of wood is 1.716 joules/gram degree Celsius. What is the mass of the piece of wood? ОА. 16 g OB.

Balance the following equation: C + O2 → CO2 * a. 2C + 2O2 → CO2 b. C2 + O2 → 2CO2 c. 2C + 2O2 → 2CO2 d. Already balanced

If an atom has five valence electrons how many electrons does it need to gain to achieve a stable electron configuration

Hydrogen peroxide decomposes to form water and oxygen gas

How many moles of CO will be produced, if 32.5grams of H2O are produced? C6H6S+6O2=>6CO+3H2O+SO3

Identify and briefly describe two ecosystems in your community that are beyond schoolyard

Is N2H2 a ionic compound?

What do Lewis dot structures show?

300 grams of a compound which contains only carbon, hydrogen and oxygen is analyzed and found to contain the exact same percentage of carbon as it has oxygen. The percentage of hydrogen is known to be 5.98823%.