Chemistry Sem 2 Review A 24/25

Subatomic Particles

100

This element has 1 proton and 1 electron

Hydrogen

200

This element has 9 electrons

Fluorine

300

This subatomic particle can always be used to identify the element

Proton

400

How many electrons does a neutral atom of Calcium have?

20

500

Which element has 28 Neutrons

Chromium

Stoichiometry

100

What is the molar mass of CO₂?

44 g/mol

200

What are the correct coefficients for the following chemical equation?

__MgCl₂ + __Al -> __Mg + __AlCl₃

3, 2, 3, 2

300

What is the mole ratio of Ba(OH)₂ to NH₃?

Ba(OH)₂ + 2NH₄Cl -> 2H₂O + BaCl₂ + 2NH₃

1:2

400

How many grams are in 3.5 moles of CuSO₄?

560g CuSO₄

500

8g of H₂ will produce ___g of H₂O?

2H₂ + O₂ -> 2H₂O

72g H₂O

Thermodynamics

100

Endothermic reactions _________ the temperature of the surroundings, like with Barium Hydroxide and Ammonium Chloride.

decrease

200

The chemical reaction between water and sodium hydroxide that we performed during our hot/cold pack labs and our soap making lab is very _________, meaning that it felt hot to the touch.

exothermic

300

A __________ is used to measure heat exchange between a substance and its surroundings.

Calorimeter

400

We threw a gummy bear into a heated test tube of potassium chlorate, and it sent steam shooting into the air. It must have been an _____________ reaction.

exothermic

500

The specific heat of a metal is .55 J/g°C. Its temperature changed by 13° and the total heat exchanged between the metal and its surroundings was 531 J. How much does the metal weigh?

74.27g

Miscellaneous

100

A chemical compound with the formula C₆H₁₂OH has this many Hydrogen atoms.

13

200

Temperature is a measure of the _______ energy of particles, which generally corresponds with the speed of those particles.

kinetic

300

The smaller the piece of a substance, like powdered sugar, the higher the _________ _______.

surface area

400

A catalyst ______ take part in a reaction. It helps get it started by lowering the activation energy of the reaction.

doesn't

500

This classification of elements are poor conductors of heat and electricity, and are generally gases at room temperature.

non-metals

Latin Food

100

This is Spain's most famous dish, consisting most often of rice and seafood.

paella

200

A flat unleavened bread often made from cornmeal and water.

tortilla

300

A complex sauce used in Mexican cuisine.

mole

400

Made from a combination of avacado, cilantro, lime, garlic, salt and often tomato.

Guacamole

500

'Pan de Muerto' is a sweet bread served on this important holiday in Mexico.

Dia de los Muertos