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faust18 [17]
3 years ago
7

GIVING BRAINIEST FIVE STARS AND HEART!

Chemistry
1 answer:
Romashka [77]3 years ago
4 0

Answer:

Matter cannot be created destroyed

Explanation

Matter can change form through physical and chemical changes, but through any of these changes, matter is conserved. The same amount of matter exists before and after the change—none is created or destroyed. This concept is called the Law of Conservation of Mass.

You might be interested in
How do the alkali metals differ from the alkaline earth metals?
Alik [6]

Answer & Explanation:

  • The alkali metals are the elements found in the first group of the periodic table.
  • Alkaline earth metals are found in the second group of the periodic table.
  • Alkali metals are Lithium (Li), sodium(Na), potassium (K), Rubidium (Rb), Cesium (Cs) and Francium (Fr).
  • Alkaline earth metals include; Beryllium (Be), Magnesium (Mg), Calcium (Ca), Strontium (Sr), Barium (Ba) and Radium (Ra).
  • Alkali metals are very reactive and none of these metals do not occur as free metals in nature.
  • Alkaline metals are also do not occur freely in nature and they are also very reactive.
  • For alkali elements, the densities of Lithium and Sodium are less than the density of water. However, the other elements are denser than water. Many of alkali metal compounds (NaCl, KCl, Na2, CO3, NaOH) are commercially very important.
  • Alkaline elements in this group are denser than water.
7 0
3 years ago
Is the boiling point of oxygen higher than nitrogen's
PSYCHO15rus [73]
The boiling point of oxygen is higher than nitrogen's boiling The reason the boiling point of O2 is higher is not because of increased van der Waals interactions, but simple physics. The mass of a molecule of O2 is greater than that of a molecule of N2, so the molecule of O2 traveling at a speed sufficient to break out of the liquid phase has a greater kinetic energy than an analogous N2 molecule. The net effect is that more energy must be distributed throughout a sample of O2 to achieve a given vapor pressure (in this case equal to atmospheric pressure) than for a sample of N2. More energy means greater temperature.
8 0
4 years ago
TIME REMAINING
jek_recluse [69]

Answer:

Liquid

Explanation:

had this ln a test and got it right

6 0
3 years ago
please help I don’t understand the difference between ammonium and ammonium ion. I possibly did 9.a) correct but part b is a bit
ozzi

You may find the electron diagram of ammonia and the ammonium ion in the attached picture.

Explanation:

Ammonia NH₃ have covalent bonds with the hydrogen atoms in which for each bond one electron comes from nitrogen atom (blue dot) and the other from the hydrogen atom (red dot). You may see that the nitrogen remains with the lone pair of electrons that does not participate in bonding.

Ammonia NH₃ have a basic character and is able to accept a proton H⁺ from an acid to form the ammonium ion NH₄⁺. The fourth bond formed its called a coordinative-covalent bond that is created only with the nitrogen lone pair of electrons (blue dots).

Learn more about:

ammonium ion

brainly.com/question/10874844

#learnwithBrainly

5 0
3 years ago
when 46 grams of water are produced how many grams of oxygen must react according to the equation 2h2+o2=2h2o
natka813 [3]

the balanced equation for the formation of water is as follows

2H₂ + O₂ ---> 2H₂O

molar ratio of oxygen to water is 1:2

mass of water produced is - 46 g

therefore the number of moles of water produced - 46 g / 18 g/mol = 2.56 mol

1 mol of oxygen reacts to give 2 mol of water assuming oxygen is the limiting reactant

for 2 mol of water to be produced 1 mol of oxygen has to react

therefore for 2.56 mol of water to be produced - 1/2 x 2.56 mol = 1.28 mol of oxygen should react

mass of oxygen reacted is - 1.28 mol x 32 g/mol = 41.0 g

mass of oxygen that should react is 41 g

8 0
4 years ago
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