All categories

2 years ago

In the chemical equation Zn + 2HCl ZnCl2 + H2, the reactants are

Chemistry

2 answers:

Sindrei [870]2 years ago

5 0

The answer is A ( and the answer for the products is C )

Rudik [331]2 years ago

4 0

Answer : The correct option is A.

Explanation :

The given chemical reaction is,

$Zn+2HCl\rightarrow ZnCl_2+H_2$

In the reaction, Reactants are present on the left side of the arrow and products are present on the right side of the arrow.

Reactants are those which takes part in and undergoes change during the reaction.

Products are those which are formed during the reaction.

In the given reaction, zinc react with hydrochloric acid to form zinc chloride and hydrogen gas.

Therefore, the reactants are zinc and hydrochloric acid.

You might be interested in

A chemical reaction has Hf,reactants = –1,023 kJ and Hf,products = –935.3 kJ. Which graph can be used to represent this reaction

natita [175]

Hey there!

The pathway will resemble a hill , The minimum amount of energy the reagents need to make the complex activated, is the activation energy , The difference in heights of the products and reactants will be equivalent to the difference in energies.:

ΔH = ( -1,023 kj ) - ( - 935,3 kj )

ΔH = -87.7 Kj

7 0

3 years ago

Read 2 more answers

Which prediction about a methane molecule would most likely be made by using both the quantum model of the atom and John Dalton'

jeyben [28]

Answer. Methane molecule is made up of five atoms; four of hydrogen and one of carbon. Carbon atom is sharing its 4 valence electrons with 4 hydrogen atoms each having 1 electron.

Explanation:

Dalton model of atom said that the matter is made up of smallest indivisible particle that is an atom. From which he predicted that methane molecule will be made up one carbon atom and 4 hydrogen atoms.

Quantum model of atom described the structure of atom with the help of four quantum numbers. These number explained the position, magnetic character and spin of electrons inside the atom. and further explained the sharing of electron between one one carbon and 4 hydrogen atoms.

Hence from these two models we can predict that methane molecule is made up atoms with sharing of electrons.

4 0

3 years ago

Suppose that the root-mean-square velocity vrms of water molecules (molecular mass is equal to 18.0 g/mol) in a flame is found t

Zolol [24]

Answer:

$T=954.41\ K$

Explanation:

The expression for the root mean square speed is:

$C_{rms}=\sqrt {\dfrac {3RT}{M}}$

R is Gas constant having value = 8.314 J / K mol

M is the molar mass of gas

Molar mass of water vapor = 18.0 g/mol = 0.018 kg/mol

Temperature = ?

$C_{rms}=1150$ m/s

$1150=\sqrt{\frac{3\times 8.314\times T}{0.018}}$

$1322500=\frac{24.942T}{0.018}$

$T=954.41\ K$

4 0

2 years ago

3 reasons why aluminium is used in making of cooking vessels

Annette [7]

Answer is : It is a good thermal and electrical conductor. -The main point to be noted is that aluminium is a highly reactive element and still it is used for making cooking utensils. The reason is that aluminium has a very high affinity for oxygen. So, it reacts with oxygen and forms a layer of aluminium oxide on its surface.

7 0

2 years ago

Read 2 more answers

Which of the following choices is a sign that a glacier was present at one point in history?

Alja [10]

answer:

B. U-shaped valleys

4 0

2 years ago