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
svetoff [14.1K]
3 years ago
12

Plz helpppppppppppppppppp

Chemistry
1 answer:
ohaa [14]3 years ago
3 0

Answer:

the answer to your question above is D

You might be interested in
To measure the amount of nickel in some industrial waste fluid, an analytical chemist adds sodium hydroxide solution to a sample
Cloud [144]

Answer:

The final balanced equation is

Ni2+ + 2NaOH --> Ni (OH)2 + 2Na+

Explanation:

It is given that sodium hydroxide is added to collect the solid nickel(II) hydroxide product

The empirical equation for this statement is

Ni2+ + NaOH --> Ni (OH)2 + Na+

We will first balance the hydroxide molecule. On the right side there are two OH molecules.

Thus, on the left side we will take 2 sodium hydroxide

Ni2+ + 2NaOH --> Ni (OH)2 + Na+

Now we will balance the sodium ion which are 2 in numbers on the left side and 1 on the right side

Ni2+ + 2NaOH --> Ni (OH)2 + 2Na+

So, the final balanced equation is

Ni2+ + 2NaOH --> Ni (OH)2 + 2Na+

8 0
3 years ago
When 1 mole of H2(g) reacts with F2(g) to form HF(g) according to the following equation, 542 kJ of energy are evolved H2(g) + F
topjm [15]

Answer: The reaction is exothermic. The value of q is  -542 kJ.

Explanation:

Endothermic reactions are defined as the reactions in which energy of the product is greater than the energy of the reactants. The total energy is absorbed in the form of heat and  for the reaction comes out to be positive.

Exothermic reactions are defined as the reactions in which energy of the product is lesser than the energy of the reactants. The total energy is released in the form of heat and  for the reaction comes out to be negative.

Thus H_2(g)+F_2(g)\rightarrow 2HF(g) evolves heat , it is exothermic in nature. The value of q is -542kJ.

7 0
3 years ago
What is combination reaction and also define it's properties?​
tigry1 [53]

Answer:

This is when two or more compounds or elements react to form a single product.

In these reactions new substances are produced or synthesized.

in simple terms the elements or compounds are converted to something new.

5 0
3 years ago
Read 2 more answers
Canadian fans of Justin bieber and Drake . ​
KatRina [158]

Answer:

what?

Explanation:

6 0
3 years ago
Read 2 more answers
Who was the scientist responsible for the theory of evolution by natural selection?
Allushta [10]

Answer:

Charles Darwin

Explanation:

Charles Darwin is more famous than his contemporary Alfred Russel Wallace who also developed the theory of evolution by natural selection. scientist who studies living organisms.J

8 0
3 years ago
Read 2 more answers
Other questions:
  • Theoretically how many moles of carbonic acid will be produced by the 3.00 g sample of NaHCO3
    13·2 answers
  • This table compares magnitude and depth of four earthquakes occurring between 1955 - 2017. The surface changes that occur as a r
    15·1 answer
  • What do elements in the same column of the periodic table have in common?
    9·2 answers
  • Taxonomic classification is a process of science that organizes living organisms by their structure, function, and relationships
    5·1 answer
  • What mass of Ba3(PO4)2 is contained in 1575 mL of a 0.35M solution of Ba3(PO4)2
    11·1 answer
  • true or false: 1. An object can have only one type of energy at a time 2. If an object has energy, it must be moving. 3. All ene
    6·1 answer
  • What is the mass of 12.3 moles of helium (He)?
    15·1 answer
  • Need help ASAP with this question
    10·1 answer
  • What do we do to increase the surface area of solid reactants to high rate of reaction?​
    8·1 answer
  • Calculate the molecular mass of the element
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!