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Samado
Questions (13)
Use the table of molar masses to answer the question
Element: | Molar mass (g/mol): Silicon 28.09 Oxygen 16.00 How many molecules
1 answer
982 views
Use the reaction to answer the question
Fe₂O₃ + 3H₂SO₄ How many atoms of oxygen will be found in the product(s) of the
1 answer
539 views
a pharmaceutical company wants to extract an ingredient from pomace supplied by a certain food processing plant. which process
0 answers
689 views
Why is thermal energy (heat) required to freeze ice into crystals?
A. heat must be released by the reactants and the products B.
6 answers
2,061 views
Endothermic reactions absorb a lot of energy. Exothermic reactions give off a lot of energy.
Which type of reaction has a higher
1 answer
1,131 views
Which statement is the best description of the energy found in molecules of water?
A. Colder molecules have more kinetic energy.
10 answers
2,536 views
Use the periodic table and example bond table to answer the question.
Example Bond Energies of Ionic Compounds: Li-F = 1036
15 answers
5,057 views
Why are gases like nitrogen and oxygen not greenhouse gases, despite being gases that exist in the atmosphere?
A. They occur
9 answers
4,944 views
Which ancient civilization made significant contributions to the field of architecture?
A. Greek B. Egyptian C. Roman D. Chinese
0 answers
178 views
Alpha Particles Emission Quick Check
A process in which a large nucleus splits into two or more parts is called _. A. Radioactive
5 answers
8,226 views
Hydrogen (H2) and oxygen (O2) combine to make water (H2O) in the following equation.
6H2 + 3O2 -> ?H2O How many water molecules
9 answers
4,970 views
Which statement best describes the law of conservation of mass?
A. Matter cannot be created or destroyed in a chemical reaction
9 answers
6,912 views
What are some examples of endothermic reactions?
0 answers
2,234 views
Answers (8)
Thank you! I hope I get the other ones correct too
Wait it would be 1, the purple would turn pink when cooled down
Would it be #2? Wouldn’t heating the blue solution cause it to go towards pink and make it purple?
1. They are tightly bound, so they cannot vibrate and release radiation. 2. The molecule vibrates and releases infrared energy 3. No, this is incorrect because water vapor is a greenhouse gas and will increase the greenhouse effect. 4. The burning of
1. Nuclear fission 2. two protons and two neutrons 3. The model shows alpha decay, which is a type of nuclear fission 4. No, it is not because the mass number does not change 5. Gamma emission is a type of radioactive decay, but is not a fission reaction
1. The number of freely moving neutrons increases over time 2. A neutron should be expressed as 10n, not 01n 3. The table tennis balls represent neutrons that are released when the nucleus splits and cause other nuclei to split 4. The total mass number of
1. Six 2. 12 oxygen atoms 3. Reactant bonds break and atoms rearrange to form new product combinations 4. Two 5. No, it does not because the number and mass of atoms are conserved even though the number of molecules is not
1. Matter cannot be created or destroyed in a chemical reaction 2. Numbers of reactant and product atoms 3. 20 g 4. A sealed jar of salad dressing 5. Two Thought I’d give back a lil since I couldn’t find these answers online
