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Sloan [31]
3 years ago
10

The second step to the scientific method is to state the "problem", the scientific question to be solved. What is one requiremen

t that needs to be fulfilled in order for the "problem" to be valid? A: It needs to be a problem that has a number answer. B: It needs to be a problem that can be solved experimentally. C: It needs to be a problem that has a yes or no answer.
Chemistry
2 answers:
Aleks [24]3 years ago
7 0
The answer is B. In order to test something out you need to be able to solve it.
kykrilka [37]3 years ago
5 0
B B B B B B B B B B B B B B B B BB B B. :)
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Is it possible to have boiling ice water?
Virty [35]

Answer:

Possibly

Explanation:

Cold water does not boil faster than hot water. ... As a result, cold water will be absorbing heat faster while it is still cold; once it gets up to the temperature of hot water, the heating rate slows down and from there it takes just as long to bring it to a boil as the water that was hot to begin with.

8 0
3 years ago
What is the ph of a solution made by mixing 100.00 ml of 0.20 m hcl with 50.00 ml of 0.10 m hcl? assume that the volumes are add
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I completely ignored sig figs though

3 0
3 years ago
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Which formula equation represents the burning of sulfur to produce offer the oxide
jarptica [38.1K]
Reaction between S and O:

S+O2 -----> SO2
8 0
3 years ago
One crystalline form of silica (SiO2) has a cubic unit cell, and from X-ray diffraction data it is known that the cell edge leng
Sav [38]

Answer:

8 Silicon atom are present in unit cell.

16 oxygen atoms are present unit cell.

Explanation:

Number of atoms in unit cell = Z =?

Density of silica = tex]2.32 g/cm^3[/tex]

Edge length of cubic unit cell = a  = 0.700 nm = 0.700\times 10^{-7} cm

1 nm=10^{-7} cm

Molar mass of Silica  = 28.09 g/mol+16.00\times 2=60.09 g/mol

Formula used :  

\rho=\frac{Z\times M}{N_{A}\times a^{3}}

where,

\rho = density

Z = number of atom in unit cell

M = atomic mass

(N_{A}) = Avogadro's number  

a = edge length of unit cell

On substituting all the given values , we will get the value of 'a'.

2.32 g/cm3=\frac{Z\times 60.09 g/mol}{6.022\times 10^{23} mol^{-1}\times (0.700\times 10^{-7}cm)^{3}}

Z = 8

1 silicon is 2 oxygen atoms. then 8 silicon atoms will be 16 oxygen atoms.

5 0
4 years ago
An ionic bond can be formed between
Marina86 [1]

Answer:

Two unlike charged ions.

Explanation:

The positive charge on one and the negative on the other helps form the ionic bond.

Ionic bonding is the complete transfer of valence electron(s) between atoms. In these types of bonds, the metal loses electrons to become a positively charged cation, whereas the nonmetal accepts those electrons to become a negatively charged anion..

Ionic bonding is observed because metals have few electrons in their outer-most orbitals. By losing those electrons, these metals can achieve noble gas configuration and satisfy the octet rule.

3 0
3 years ago
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