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3 years ago

I NEED THIS ANSWER A.S.A.P

Chemistry

2 answers:

grigory [225]3 years ago

6 0

Extrusive. Please give me a brainliest! Im new i really need it thanks

Svetradugi [14.3K]3 years ago

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Your answer for that question is D

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5 - HCN + CuSO4 → Type of reaction

lesya692 [45]

Answer:

$CuSO_{4}+2HCN\rightarrow Cu(CN)_{2}+H_{2}SO_{4}$

Explanation:

The valancy of Cu = +2

SO4 = -2

CN = -1

H =+1

So when HCN and CuSO4 react Cu(CN)2 and H2SO4 are formed.

Cu(CN)2 formation :

2 CN = 2 x -1 = -2

Its should attach to +2 charge atom which is Cu

So 1 Cu and 2 CN = Cu(CN)2

Similary,

H2SO4 formation:

SO4 = -2 charge

It require +2 charge so need two H+

2 H = 2x1 = +2 charge

Hence , 1 SO4 and 2 H combine to form H2SO4

Law of conservation of mass: It states that mass can neither be created nor destroyed during a chemical reaction.

Total mass of the reactant must be equal to total mass of product.

Only those equations are balanced which follows law of conservation of mass

Count total number of atoms in the reactant and product .

The number of atoms in the product = The number of atoms in the reactant

In the given equation:

$CuSO_{4}+2HCN\rightarrow Cu(CN)_{2}+H_{2}SO_{4}$

Reactant are 2HCN and CuSO4

atoms of H = 1x2=2 , C=1x2=2 , N=1x2=2 , Cu = 1, S = 1 ,O =4

Products: Cu(CN)2 and H2SO4

atoms of H =2 , S=1 , O=4 ,C = 2x1=2 , N = 2x1 =2 , Cu = 1

Hence this is balance equation

7 0

3 years ago

Which answer shows an example of transmutation? salt and water mixing to make salt water wood burning to make smoke and ash lead

rjkz [21]

Answer is: lead changing to gold.
Transmutation is the conversion of an atom of one element to an atom of another through nuclear reactions. Number of protons or neutrons in the nucleus is changed. Particle accelerators and nuclear reactors used for creating elements.

8 0

3 years ago

Read 2 more answers

Calculate how many moles of NH3 form when each quantity of reactant completely reacts according to the equation:

borishaifa [10]

we are given with the equation 3N2H4(l) => 4NH3(g) + N2(g) that shows the decomposition of N2H4 to give ammonia and nitrogen gas. 3 moles of N2H4 forms 4 moles of NH3. When 2.6 moles N2H4 are used, 3.47 moles of ammonia is formed

4 0

3 years ago

What are the main ideas of the cell theory

sineoko [7]

all living things are made of cells

cells come from preexisting cells

all living organisms are made up of one or more cells

6 0

3 years ago

NaOH (aq) + H2SO4 (aq) > H2O + NaSO4 (aq)

Elden [556K]

Answer:

$2 NaOH (aq) + H_2SO_4 (aq)\rightarrow 2 H_2O (l) + Na_2SO_4 (aq)$

Explanation:

Let's correct and balance the given equation:

$NaOH (aq)$ is sodium hydroxide, charge of sodium is +1, charge of hydroxide is -1, so it's fine;
$H_2SO_4 (aq)$ is sulfuric acid, charge of hydrogen cation is +1, charge of sulfate is -2, sulfate is balanced by the two protons;
$H_2O (l)$ is firstly a molecule, it's water, in its liquid state, the oxidation state of +1 for the two hydrogens is balanced by the oxidation state of -2 for oxygen;
sodium sulfate should be $Na_2SO_4 (aq)$ , since sulfate has a charge of -2, this would require two sodium cations to balance it.

The equation becomes:

$NaOH (aq) + H_2SO_4 (aq)\rightarrow H_2O (l) + Na_2SO_4 (aq)$

We require 2 NaOH in order to balance the two sodium cations on the right, this would yield a total of 4 hyrogens on the left, so we also need two water molecules to balance it fully:

$2 NaOH (aq) + H_2SO_4 (aq)\rightarrow 2 H_2O (l) + Na_2SO_4 (aq)$

4 0

3 years ago