All categories

3 years ago

10. A sample of an unknown composition was tested in a laboratory. The sample could not be broken down by

Chemistry

2 answers:

damaskus [11]3 years ago

8 0

Answer:

it would be an element because its an element

Explanation:

vfiekz [6]3 years ago

7 0

It’s element it’s correct

You might be interested in

An aqueous solution of potassium hydroxide is standardized by titration with a 0.122 M solution of hydrobromic acid. If 22.1 mL

Gemiola [76]

Answer:

The molarity of the potassium hydroxide solution is 0.104 M

Explanation:

Step 1: Data given

Molarity of hydrobromic acid (HBr) = 0.122 M

Volume of potassium hydroxide (KOH) = 22.1 mL = 0.0221 L

Volume of hydrobromic acid = 18.8 mL = 0.0188 L

Step 2: The balanced equation

HBr(aq) + KOH(aq) → KBr(aq) + H2O(l)

Step 3: Calculate moles of HBr

Moles HBr = molarity HBr * volume HBr

Moles HBr = 0.122 M * 0.0188 L

Moles HBr = 0.0022936 moles

Step 4: Calculate molarity of KOH

We need 0.0022936 moles of KOH to neutralize the HBr

Molarity = moles / volume

Molarity KOH = 0.0022936 moles /0.0221 L

Molarity KOH = 0.104 M

The molarity of the potassium hydroxide solution is 0.104 M

4 0

3 years ago

Why are redox reactions often written as net ionic equations?

Scorpion4ik [409]

Answer:

A. To focus on only those ions that form the precipitate

Explanation:

Net ionic equations cancel out the ions that appear on both sides of the reaction because they essentially don't participate in the reaction. This is very useful when dealing with redox reactions because are complicated enough without spectator ions being in the way, so they help focus on those ions that actually form the precipitate.

Key Terms

Spectator Ions: an ion that does not take part in the chemical reaction.
Net ionic equations: a equation where ions that appear on both sides are canceled out.
Redox reaction: an oxidation-reduction reaction.

3 0

3 years ago

Complete and balance the following equation:

sertanlavr [38]

You need to add the last substance to the products side(the right sode of the arrow). You have hydrogen and oxygen - water.

You get: BrO3 + N2H4 -> Br2 + N2 + H2O

# of Br: 1x1 = 1 # of Br: 2x1 = 2
O: 3x1 = 3 O: 1x1 = 1
N: 2x1 = 2 B N: 2x1 = 2
H: 4x1 = 4. H: 2x1 = 2

Br:
Multiply the reactant (left) side by 2 to balance.

O:
You've just multiplied the reactant oxygen by 2 so now the reactant side equals 6. Multiply the product (right) side by six as well.

H:
The product side is now equal to 12. Multiply the reactant side by 3 to balance.

N:
Now you have to balance N because the reactant side has been risen. So multiply the product side by three as well.

You end up with the complete and balanced equation:

2BrO3 + 3N2H4 -> Br2 + 3N2 + 6H2O

4 0

4 years ago

14. In the image below, a similarity between the salad dressing and the

Yanka [14]

Answer:

mixture

Explanation:

the other logical option would be compound but a compound consists of 2 or more chemically bonded elements and salad dressing nor raisin brand are elements.

5 0

3 years ago

A scientist wants to use a model to help present the results of his detailed scientific investigation

Brilliant_brown [7]

because the model makes the concepts easier to understand

Explanation:

A model would be useful because they make concepts easier to understand.

Models are abstractions of the real world.

Scientists use model to make concepts easier to understand
Models take parts of the real world and simulates them.
They help remove the ambiguity that might be associated with studying the real world.

Learn more:

Model brainly.com/question/5012266

#learnwithbrainly

6 0

3 years ago