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Ket [755]
3 years ago
10

The reaction ch4 (g) + 2 o2 (g) ? co2 (g) + 2 h2o (g) is: the reaction ch4 (g) + 2 o2 (g) co2 (g) + 2 h2o (g) is: an exothermic

reaction. a redox reaction. a combustion reaction. all of the above none of the above
Chemistry
1 answer:
barxatty [35]3 years ago
5 0
All of the above
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The oxidation number of As in Na3AsO2 is
DiKsa [7]
Step 1:
           Write down Chemical formula, Overall compound is neutral, so overall charge on it is zero,

                                              Na₃AsO₂  =  0

Step 2:
           Write down the oxidation state of known elements, i.e O.S of Na is +1, and O.S of O is -2, Now put these values in above formula.

                                        (+1)₃ + As + (-2)₂  =  0

Step 3:
           Now solve for As,

                                        (+1)₃ + As + (-2)₂  =  0

                                        +3 + As - 4  =  0

                                         As  =  4 - 3

                                         As  = +1
Result:
           
Oxidation state of Arsenic in Na₃AsO₂ is +1.
3 0
3 years ago
What is the freezing point of water that has had 1m salt solution added to it?
Ad libitum [116K]
I think it is 25 degrees F.

HOPE THIS HELPS
6 0
3 years ago
Determine whether the material is a mineral or a non-mineral based on the description
almond37 [142]

Answer:

  • Calcium is homogeneous Three  percent of Earth's crust is made  of calcium Mineral
  • Glycerin is a viscous liquid at room temperature.  Non-mineral
  • Emerald is hard and does not  decay. Its chemical formula is  Be3Al2(SIO3)6  Mineral
  • Chlorophyll is produced in plants during photosynthesis  Non-mineral

Explanation:

Minerals are generally solid and inorganic substances, with defined crystalline structures, that exist in the earth's crust, formed by one or more chemical elements.

Calcium is the fifth element in abundance in the earth's crust, it is found forming mineral compounds such as calcite and dolomite or rocks such as marble, limestone and dolomite.

Glycerin is a colorless, slimy and sweet-tasting substance that is obtained from animal and vegetable fats and oils. According to its characteristics, it does not have a solid structure, which is why it is considered a non-mineral.

Emerald is a cyclic silicate of beryllium and aluminum whose chemical formula is Be3Al2(SiO3)6, it has a well-defined crystalline structure.

Chlorophyll is a green pigment that is present in the leaves and stems of many vegetables and is responsible for the photosynthesis process; does not have a crystalline structure defined by what is considered a non-mineral.

3 0
3 years ago
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If a molecule diffusing through extracellular fluid travels 1 mm in 1 sec, how long will it take that molecule to diffuse 1 cm?
stealth61 [152]
To determine the time, we can simply do dimensional analysis from the given values. We are given the distance the fluid travels per sec and we are given the required distance to travel. Therefore, we simply divide the required distance with the rate given. It is important to take note with the units. 

t = .01 m / .001 m/s = 10 s

5 0
3 years ago
These four ELEMENTS were found in early earth and they make up all living things.
VladimirAG [237]

Answer: True

Air is a mixture of many things; it's not just Oxygen, but Hydrogen, Carbon, and Nitrogen as well are made up of air. Fun fact: Nitrogen is actually more abundant in air

6 0
3 years ago
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