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gulaghasi [49]
3 years ago
14

Please help with whatever this is and go in number order

Chemistry
1 answer:
Alenkinab [10]3 years ago
6 0
1.a- sodium(Na) b-nickel(Ni) c-iron (Fe)
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Help one number 46 please
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Say the dereference between the two is that "Exo" means "outside" and "Endo" means "inside" meaning one pulls heat inside (endothermic) and the other expels heat (exothermic)
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3 years ago
Which of the following statements a about scientific hypothesis is false?
Pachacha [2.7K]

Answer:

The false statement from the given statements is option a.

Explanation:

Hypothesis:

A hypothesis is a intelligent guess or prediction to interpret or explain any phenomena.  

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Theory:

A theory is an in depth explanation behind any physical phenomena which has been tested multiple times through the correct scientific methods and experimentation. It will give same results and observations.

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3 years ago
The element niobium, which is a metal, is a superconductor
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THE METAL IS THE ELEMENT AND IDK IM GUESSING
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3 years ago
Find the empirical formula of the compound ribose, a simple sugar often used as a nutritional supplement. A 14.229 g sample of r
MakcuM [25]

Answer:

CH2O

Explanation:

Firstly, we need to convert the masses of the elements to percentage compositions. This can be done by placing the mass of each element over the total mass multiplied by 100% . We can start with carbon.

C = 5.692/14.229 * 100 = 40%

O = 7.582/14.229 * 100 = 53.29%

H = 0.955/14.229 * 100 = 6.71%

We then proceed to divide each percentage composition by their atomic mass of 12, 16 and 1 respectively.

C = 40/12 = 3.333

O = 53.29/16 = 3.33

H = 6.71/2 = 6.71

Dividing by the smaller value which is 3.33

C = 3.33/3.33 = 1

O = 3.33/3.33= 1

H = 6.71/3.33 = 2

The empirical formula of the compound ribose is CH2O

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4 years ago
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CH4 is the ___________________ formula for methane.
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CH4 is the molecular formula for methane.
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