Save
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account. Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

DHS PS Ch 19 Part 1

QuestionAnswer
Change of one or more substances converted into new substances describes a ______ ________? chemical reaction
Substances that combine or change in a chemical reaction are ____? reactants
New substance that are produced in a chemical reaction are called __________? products
A law which states that, in a chemical reaction, matter is not created or destroyed; it stays the same is __________? Conservation of Mass
What are coefficients? numbers which represent the number of units of each substance in a reaction
Knowing coefficients of chemical reactions allowed chemists to do what? use the correct amounts of reactants to predict the amounts of products produced.
What is a subscript? number which represents the number of atoms in a molecule of a particular element
In a chemical equation what side of the will you find the products? to the right of the arrow
In a chemical equation what side will you find the reactants? to the left of the arrow
In order for an equation to be balanced, the same number of ____ must be on each side of the equation. atoms
Whom is known as the father of modern chemistry? Lavoiser
What type of chemical equation has the same number of atoms of each element on each side of the equation? balanced
A way to describe a chemical reaction using chemical formulas and symbols is? a chemical equation
How many atoms are present in 4 H2O? 12
Ten grams of calcium oxide react to produce 9.3g of calcium and _g of oxygen. What is the mass of the oxygen produced? 0.7g
What does it mean for a chemical equation to be balanced? The same number of atoms of each element is on both sides of the equation.
Correct coefficient for mercury (II) oxide in the following equation: ___ HgO=> 2Hg+ O2? 2
Why is oxygen written with a subscript 2? It exists as a diatomic molecule.
According to the law of conservation of mass, if two atoms of hydrogen are used as a reactant, how many atoms of hydrogen must be part of the product? 2
Show a balanced chemical equation for the synthesis of NaBr from Na and Br2? 2Na+Br2=2NaBr
Which reactant correctly balances the following equation: 4Al+ ______=> 2Al2O3? 3O2
Balance the following equation: __ H2SO4+ __ NaNO2=> HNO2+ Na2SO4 1,2,2,1
In a chemical equation, the symbol that means dissolved in water is ______. (aq)
According to the law of conservation of mass, how does the mass of the products in a chemical reaction compare to the mass of the reactions? The masses are equal.
TRUE/FALSE: An ice cube melts into liquid water is an example of a chemical reaction. False
A change in which one or more substances are converted into new substances is called a _____. chemical reaction
How would a relationship between reactants and products be shown? reactants --> products
What does the law of conservation of mass state? Matter cannot be created or destroyed, but is conserved.
According to the law of conservation of mass, if 4 g of O combine with 2 g of H, how many grams of H2O are produced? 6g
The symbol (s)used in a reaction stands for a _____. solid
The symbol (l) used in a reaction stands for a _____. liquid
The symbol (g) used in a reaction stands for a _____. gas
The symbol (aq) used in a reaction stands for _____. aqueous or dissolved in H2O
What is the function of coefficients in a chemical equation? They act as unit managers representing the number of units of each substance taking part in a reaction.
A number below and to the right of a symbol indicating the number of atoms is called a _____. subscript
An equation that has the same number of atoms on each side is called a ________. balanced chemical equation
Why do we balance chemical equations? to satisfy the law of conservation of mass
When balancing chemical equations, you are only allowed to change the _____. coefficients
What coefficient is assumed if no coefficient is written before a formula in a chemical equation? 1
A _____ is the force that holds two atoms together. chemical bond
A change in which one or more substances are converted into a new substance is called a(n) _____ reaction. chemical
Numbers in front of the symbols and formulas in an equation are called _____. coefficients
If the number of atoms of each element on the left side of an equation is equal to the number of atoms of each element on the right side of the equation, the equation is ______. balanced
In a chemical equation, the substances that are produced are called ______. products
Created by: pherriman
Popular Physical Science sets

 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards