Docsity
Log inSign up
Docsity
Prepare for your exams
Prepare for your exams

Study with the several resources on Docsity

Earn points to download
Earn points to download

Earn points by helping other students or get them with a premium plan

Guidelines and tips
Guidelines and tips
Sell on Docsity
Sell on Docsity
Log inSign up

Prepare for your exams

Study with the several resources on Docsity

Find documents

Prepare for your exams with the study notes shared by other students like you on Docsity

Search Store documents

The best documents sold by students who completed their studies

Search through all study resources
Docsity AINEW

Summarize your documents, ask them questions, convert them into quizzes and concept maps

Explore questions

Clear up your doubts by reading the answers to questions asked by your fellow students

Earn points to download

Earn points by helping other students or get them with a premium plan

Share documents
download point icon20 Points

For each uploaded document

Answer questions
download point icon5 Points

For each given answer (max 1 per day)

All the ways to get free points
Get points immediately

Choose a premium plan with all the points you need

Study Opportunities

Choose your next study program

Get in touch with the best universities in the world. Search through thousands of universities and official partners

Community

Ask the community

Ask the community for help and clear up your study doubts

University Rankings

Discover the best universities in your country according to Docsity users

Free resources

Our save-the-student-ebooks!

Download our free guides on studying techniques, anxiety management strategies, and thesis advice from Docsity tutors

From our blog

Exams and Study
Go to the blog

Integrated Science A - Unit 4 Exam, Exams of Advanced Education

Virginia Union University (VUU)Advanced Education

A set of questions and answers related to an integrated science a - unit 4 exam. It covers a wide range of topics in chemistry, including chemical reactions, reaction rates, equilibrium, and radioactivity. The document examines various chemical equations, discusses the roles of reactants and products, and explores concepts like the law of conservation of mass, the law of conservation of energy, and le châtelier's principle. It also delves into the types of radioactive decay, the characteristics of radioactive particles, and the use of radioactive isotopes for dating purposes. A comprehensive overview of the key topics and concepts covered in this unit of the integrated science a course, making it a valuable resource for students preparing for the exam.

Typology: Exams

2024/2025

Available from 10/25/2024

cate-mentor
cate-mentor 🇺🇸

2.2K documents

1 / 4

Toggle sidebar

This page cannot be seen from the preview

Don't miss anything!

bg1
Integrated science a - unit 4 exam
an atom of magnesium and two atoms of chlorine react and yield the compound of magnesium chloride.
- Mg + 2Cl →→ MgCl2
examine the equation.
C3H8 + 5O2 →→ 3CO2 + 4H2O
what are the roles of the substances in the equation? - the substances C3H8 and 5O2 are reactants that
react to form the products 3CO2 and 4H2O.
element a has a half-life of 10 days. a scientist measures out 200 g of this substance. after 30 days pass,
the scientist reexamines the sample.
how much element a will remain in the sample? - 25 g
what should lana do to determine the answer to her teacher's question? - lana should write and balance
the chemical equation, because the law of conservation of mass states that the number of atoms for
each element in the reactants must equal the number of atoms for each element in the products.
examine the unbalanced equation.
____AI + ___O2 -> ___AI2O3
which of the answer choices shows the balanced equation? - 4Al + 3O2 →→ 2Al2O3
examine the equation.
2Ca + O2 →→ 2CaO
pf3
pf4

Partial preview of the text

Download Integrated Science A - Unit 4 Exam and more Exams Advanced Education in PDF only on Docsity!

Integrated science a - unit 4 exam

an atom of magnesium and two atoms of chlorine react and yield the compound of magnesium chloride.

  • Mg + 2Cl →→ MgCl examine the equation. C3H8 + 5O2 →→ 3CO2 + 4H2O what are the roles of the substances in the equation? - the substances C3H8 and 5O2 are reactants that react to form the products 3CO2 and 4H2O. element a has a half-life of 10 days. a scientist measures out 200 g of this substance. after 30 days pass, the scientist reexamines the sample. how much element a will remain in the sample? - 25 g what should lana do to determine the answer to her teacher's question? - lana should write and balance the chemical equation, because the law of conservation of mass states that the number of atoms for each element in the reactants must equal the number of atoms for each element in the products. examine the unbalanced equation. ____AI + ___O2 -> ___AI2O which of the answer choices shows the balanced equation? - 4Al + 3O2 →→ 2Al2O examine the equation. 2Ca + O2 →→ 2CaO

what is the best classification for the equation's reaction? - synthesis examine the reactants of the incomplete double displacement reaction. AgNO3 + NaCl →→ [blank]. what are the products of the double displacement reaction? - AgCl + NaNO which option shows a reaction in which calcium carbonate (CaCO3) produces calcium oxide and carbon dioxide? - decomposition: CaCO3 →→ CaO + CO a beaker containing a chemical reaction feels hot to the touch. according to the law of conservation of energy, what best predicts the stability of the products? - if the reactants released thermal energy when they reacted, they must have lost an equal amount of potential energy. the products will be more stable. which option describes the behavior of energy in exothermic reactions? - the energy of the products is less than the energy of the reactants, so energy is released into the surrounding environment. what does a scientist observe in a chemical's reaction rate? - the speed at which the reactants change to products over a given time. which reaction will have the fastest reaction rate? - https://assets.learnosity.com/organisations/625/asset/media/ which reaction represents the slowest reaction rate? - https://assets.learnosity.com/organisations/625/asset/media/ how will the addition of a catalyst affect the reaction rate of the chemical reaction? - it will cause the reaction rate to increase.

what type of particle is emitted by each type of radioactive decay? - alpha = nucleus of a helium atom beta = electron gamma = photon what nuclear reaction product has the least mass? - beta particle what is the most minimal type of protective barrier that could block the radioactive particles from this reaction? - a piece of paper which kind of nuclear reaction does this equation represent? - beta decay what happens to the half-life and mass of reactants broken down during a nuclear decay reaction? - the half-life of reactants in a nuclear decay reaction remains constant over time, but the mass of reactants that are consumed decreases. what percentage of a radioactive isotope remains after 4 half-lives? - 6.25% which reaction model represents a nuclear fission reaction? - n + A →→ B + C + n which one or more of these isotopes would be more likely to undergo nuclear decay, and why? - carbon- 14 and hydrogen-3 would be more likely to decay, because their neutrons and protons are not equal. based on this graph, what might be the best use of this radioactive isotope? - determine the age of objects less than 50,000 years old which feature of the model indicates that it represents nuclear fusion? - a helium nucleus is produced from two smaller hydrogen atoms combining.