1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
givi [52]
2 years ago
14

Please help???? i dont know this

Chemistry
2 answers:
xeze [42]2 years ago
7 0

Answer:

a and b

Explanation:

Nesterboy [21]2 years ago
4 0

Answer:

The after-rain smell is produced by an interaction between rain and the oils released by plants. Due to chemical reaction between the rain water and oils secreted out by the plants

A homemade volcano can be created by combining baking soda and vinegar. When it erupts, carbon dioxide gas is released. When vinegar reacts with baking soda  carbon-dioxide gas is released.

The Statue of Liberty has turned green over time due to the reaction of copper with ,oxygen,carbon dioxide and water.

Explanation:

Chemical change is defined as those change in which arrangement of atoms present in the substance changes and leads to formation of new substance.

The after-rain smell is produced by an interaction between rain and the oils released by plants. Due to chemical reaction between the rain water and oils secreted out by the plants

A homemade volcano can be created by combining baking soda and vinegar. When it erupts, carbon dioxide gas is released. When vinegar reacts with baking soda  carbon-dioxide gas is released.

 

CH_{3} COOH+ NaHCO_3→CO_2+H_2O+CH_3COONa

The Statue of Liberty has turned green over time due to the reaction of copper with ,oxygen,carbon dioxide and water.

Cu+O_2+CO_2+H_2O→Cu_2(OH)_2CO_3

Physical change is defined as those changes which leads to change in shape, size or state of the substance changes. No new substance is formed.

You might be interested in
Is a molecule positive or negative?
elixir [45]

It can be either they can have a negative or positive charge more specifically negatively charged molecule would called an anion and a positive one would be cation.

3 0
2 years ago
Sally has constructed a concentration cell to measure Ksp for MCln. She constructs the cell by adding 2 mL of 0.05 M M(NO3)n to
hram777 [196]

Answer:

0.1056 mole

Explanation:

As Sally knows that the charge on the metal ion is n = +2

$MCl_n=MCl_2$

In that compartment $[M^{n+}]=[m^{2+}]=8.279 \ M$

The volume of the $MCl_n$ taken in that compartment = 6.380 mL

So, the number of moles of $M^{2+} = 8.279 \times 6.380$

                                                      = 52.82 m mol

                                                      = 0.05280 mol

$MCl_n \rightarrow M^{n+}+nCl^-$

But n = 2

Therefore, moles of $Cl^-$ = 2 x moles of $M^{n+}$

                                       = 2 x 0.05282

                                       = 0.1056 mole

3 0
2 years ago
You are making a 0.2M solution of sodium acetate in the lab. Sodium acetate has a molecular mass of 82.03 g/mol. How many g of s
lyudmila [28]

Answer: The answer can be found on CHEG

Explanation:

7 0
3 years ago
Assume that 1.0 mol of C4H10 is completely burned in excess oxygen to form carbon dioxide and water. How many moles of CO2 would
In-s [12.5K]
You need to first write a chemical equation and balance it
 C₄H₁₀ + O₂ → CO₂ + H₂O
2 C₄H₁₀ + 13 O₂ → 8 CO₂ + 10 H₂O
1.0 moles               X moles
1.0 mol C₄H₁₀ (\frac{8 mol CO₂}{2 mol C₄H₁₀}) = 4 moles of CO₂
7 0
3 years ago
Valence electrons are important because these are the only electrons involved with an atom's
Salsk061 [2.6K]
<span>Valence electrons are important because these are the only electrons involved with an atom's chemical reactivity.</span>
3 0
3 years ago
Other questions:
  • What is the rate of the reaction if the concentrations of A and C are doubled and the concentration of B is tripled?
    14·1 answer
  • What is the molarity of a 250.0 milliliter aqueous solution of sodium hydroxide that contains 15.5 grams of solute
    9·1 answer
  • Which of the following are parts of the excretory system? *
    7·1 answer
  • Recycling aluminum cans and taking shorter showers are two ways to practice the blank of natural resources
    15·2 answers
  • What do the digestive and excretory systems have in common?
    9·1 answer
  • 1.) A balloon contains 0.126 mol of gas and has a volume of 2.74 L .
    8·1 answer
  • 10 examples of<br>combination reaction​
    11·2 answers
  • Balance each of these equations.
    6·1 answer
  • What does binding energy measure
    6·2 answers
  • In your OWN words explain how season are formed
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!