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cestrela7 [59]
3 years ago
9

Which statement about chemical reactions is not true?

Chemistry
1 answer:
igomit [66]3 years ago
7 0

Answer:

1: New atoms are formed as products

Explanation:

matter (atoms) cannot be created or destroyed

unless you are God or Cinderella's fairy Godmother or something

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A compound contains nitrogen and a metal. This compound goes through a combustion reaction such that compound X is produced from
tia_tia [17]

Answer:

The correct answer is: X is nitrogen dioxide, and Y is a metal oxide

Explanation:

Combustion of compound of containing nitrogen and metal will give nitrogen  dioxide and metal oxide as product. During combustion reaction a compound reacts with oxygen in order to yield oxides of elements present in the compound.

The general equation is given as:

4M_3N_x+7xO_2\rightarrow 4xNO_2+6M_2O_x

Hence, the correct answer is :X is nitrogen dioxide, and Y is a metal oxide.

6 0
3 years ago
Which is not a compound? water silicon dioxide oxygen gas carbon dioxide gas
Illusion [34]
All of these are compounds except oxygen because a compound is two or more different elements bonded together.
4 0
3 years ago
How many atoms of hydrogen are present in 7.63 g of ammonia? please help me ??
GarryVolchara [31]
The atoms  of  hydrogen  that are  present  in  7.63 g  of ammonia(NH3)

find  the  moles  of NH3 =mass/molar mass
 7.63 g/ 17 g/mol = 0.449  moles

since there  is  3 atoms of H  in NH3 the  moles of  H = 0.449 x 3 = 1.347 moles

by  use  of  1 mole = 6.02 x10^23  atoms
what  about  1.347  moles

= 1.347  moles/1   moles  x 6.02 x10^23 atoms = 8.11 x10^23  atoms of Hydrogen
3 0
3 years ago
Which of the following is an example of translational kinetic energy? windmill a tuning fork a person running a car parked in a
Hatshy [7]

a person running a car parked in a driveway

Explanation:

A person running a car parked in a driveway is an example of translational kinetic energy.

Translational motion is the movement of body along a straight path.

Translational kinetic energy refers to the energy of a body moving along a straight path.

  • It is function of the mass and velocity of the moving body.
  • The motion of train on its track is an example of this form of energy
  • A fired bullet, falling object all experience translational kinetic energy.

learn more:

Translational kinetic energy brainly.com/question/9924094

#learnwithBrainly

3 0
3 years ago
Read 2 more answers
Which transition in the hydrogen atom produces emitted light with the longest wavelength?
monitta

Answer:

Red light has the longest wavelength

Explanation:

Red light is emitted when a high energy state  electron drops from  high energy level  3 to low energy level 2. Red light has the longest wavelength and lowest energy. It is a know fact that the shorter the drop within energy levels, the  lesser the energy.

6 0
3 years ago
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