Asked by Mr Bond

Which of the following is a base?


vinegar


lemon juice


stomach acid


baking soda
Answered by Mr Bond
What feature makes water a polar molecule?


A water molecule is positively charged.


A water molecule is negatively charged.


The ends of the water molecule have opposite electrical charges.


The middle of the water molecule contains opposing charges.
Answered by Mr Bond
Which is the term for numbers that appear in the chemical formulas of some compounds?


subscripts


coefficients


square roots


exponents
Answered by Mr Bond
How does the composition of a water molecule affect its charge?


It makes the molecule nonpolar.


It makes the molecule a positive ion.


It makes the molecule polar.


It makes the molecule a negative ion.
Answered by Mr Bond
Which is true of hydroxide ions?


They dissociate to form protons.


They are not found in pure water.


They have a negative charge.


They contain two hydrogen atoms.
Answered by Mr Bond
What kind of change causes iron to rust?


freezing reaction


physical change


chemical change


state change
Answered by Mr Bond
How does the presence of an acid in a water solution affect the pH of the solution?


It neutralizes the pH.


It does not affect the pH.


It raises the pH.


It lowers the pH.
Answered by Mr Bond
What is true of every water molecule?


It is made of two water atoms.


It is made of two hydrogen atoms and one oxygen atom.


It is made of one hydrogen atom and two oxygen atoms.


It is made of one water atom and one DNA atom.
Answered by Mr Bond
Which is an example of a chemical change?


a candle burns


a teaspoon of salt dissolves


a burner gets red hot


a pan of water boils
Answered by Mr Bond
When NaOH is added to water, the hydroxide concentration increases. What can you conclude about NaOH?


It donates H + ions.


It has a low pH.


It releases protons.


It is a base.
Answered by Mr Bond
What is a radical?


a group of ions that have no charge


a group of ions that break up during a reaction


a group of atoms that act like one atom


a group of atoms that give off radiation
Answered by Mr Bond
How many oxygen atoms are in one unit of the compound Ba(OH) 2 ?


1


4


2


3
Answered by Mr Bond
A(n) _____ bond forms when two atoms share one or more pairs of electrons.


electrical


covalent


molecular


ionic
Answered by Mr Bond
What type of bond forms between a slightly positive hydrogen atom in one molecule and a slightly negative atom in another molecule?


covalent bond


ionic bond


hydrogen bond


atomic bond
Answered by Mr Bond
Which formula for sulfuric acid is written correctly to show one sulfur atom, two hydrogen atoms, and four oxygen atoms?


H 2 (SO 2 ) 2


(HS) 2 O 4


H 2 SO 4


HS 2 O 4
Answered by GPT 3.5
baking soda
Answered by GPT 3.5
The ends of the water molecule have opposite electrical charges.
Answered by GPT 3.5
subscripts
Answered by GPT 3.5
It makes the molecule polar.
Answered by GPT 3.5
They have a negative charge.
Answered by GPT 3.5
chemical change
Answered by GPT 3.5
It lowers the pH.
Answered by GPT 3.5
It is made of two hydrogen atoms and one oxygen atom.
Answered by GPT 3.5
a candle burns
Answered by GPT 3.5
It is a base.
Answered by GPT 3.5
A radical is a group of atoms that act like one atom.
Answered by GPT 3.5
2
Answered by GPT 3.5
covalent
Answered by GPT 3.5
hydrogen bond
Answered by GPT 3.5
H2SO4