Stoichiometry
What is the molar mass of H20
1. 18.02 g/mol
2. 20.02 g/mol
3. 16.00 g/mol
4. 22.00 g/mol
1. 18.02
What is the chemical formula for Sodium Chloride
NaCl
What element is on the top of the activity series?
Lithium
Explain the difference between exothermic and endothermic.
Exothermic reactions release energy, usually in the form of heat or light. This makes the surroundings feel warmer. Think of burning wood, combustion in a car engine, or even simple hand warmers—all of these give off heat.
Endothermic reactions, on the other hand, absorb energy from their surroundings. This makes the surroundings feel cooler. Examples include ice melting, cooking food (because heat is absorbed to break chemical bonds), and photosynthesis in plants.
What is the electron charge of Si?
+4
How many moles of CO2 are produced when 1 mole of CH4 reacts completely with oxygen?
1 Mole
Which element is represented by the symbol Au?
Gold
What is Voltage?
Unit of a battery's electrical potential
What is heat energy.
Heat energy, also known as thermal energy, is the energy that is transferred between objects due to a difference in temperature. It always flows from a hotter object to a cooler one until thermal equilibrium is reached.
Which element has the smallest molar mass?
Hydrogen
What is the formula used to convert grams to moles?
# of moles = Mass/Molar Mass
What is the atomic number of Carbon?
6
What direction do electrons flow in a battery?
Negative to Positive
When you boil water in a pot, what is the method in which the heat is being transfered.
Convection
What is the formula to convert moles to liters?
Volume (L)=Moles×22.4 L/mol
Find Molar Mass of NaCl
58.44 g/mol
Which element is the lightest and has the atomic number 1?
Hydrogen
Which one is the Anode and Cathode between the elements of Li and Mg
Li=anode
Mg=cathode
What is the difference between conduction and radiation?
Conduction: This happens when heat is transferred through direct contact between particles in a solid. Faster-moving (hotter) molecules collide with slower-moving (cooler) ones, passing energy along. Example? A metal spoon heating up in a pot of boiling water—heat moves from the hot liquid to the spoon.
Radiation: This occurs when heat is transferred through electromagnetic waves, without needing a medium like air or solids. The Sun warming your skin is a perfect example—heat travels through empty space in the form of infrared radiation.
What is Steez's gamertag? (Or close to)
BrittaChicknNuggt
How many grams is 0.74 moles of Sb?
90.11 grams
Which element is known as the 'king of chemicals' and has the symbol H2 S O4?
Sulfuric Acid
Write the whole activity series in order.
Lithium (Li)
Potassium (K)
Calcium (Ca)
Sodium (Na)
Magnesium (Mg)
Aluminum (Al)
Zinc (Zn)
Chromium (Cr)
Iron (Fe)
Nickel (Ni)
Tin (Sn)
Lead (Pb)
Hydrogen (H)
Copper (Cu)
Mercury (Hg)
Silver (Ag)
Platinum (Pt)
Gold (Au)
What does each letter mean in the formula Q=MC(change)T
Q= Heat Energy
M= Mass
C= Specific Heat Capacity
(change)T= Change in temperature
What is the molar mass of AlCl3
133.33 g/mol