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Sergio039 [100]
3 years ago
7

Why is water considered a pure substance and not a mixture?

Chemistry
2 answers:
BigorU [14]3 years ago
8 0

Answer:

D. Water can be separated chemically into hydrogen and oxygen.

Explanation:

i took the test

Minchanka [31]3 years ago
5 0
Water is made of only one molecule which can be chemically separated into hydrogen and oxygen. The answer is D.
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Ill give u brainliest pls help!!<br><br> how is mass of carbon conserved during cellular respiration
Elis [28]

Hi! Glucose and oxygen are required for cellular respiration. As the law of conversation states, in a biochemical reaction, mass is conserved. For every glucose molecule, 6 oxygen molecules are used up and the end products, other than the energy dissipated by the reaction, are 6 water molecules and 6 carbon dioxide molecules. Brainliest?

3 0
3 years ago
How many moles of Au are in 312 g of Au?
Talja [164]

Answer:

1.583 moles

Explanation:

Rounded Atomic Mass of Au = 197 grams

\frac{312}{197} =1.5837, 1.584

7 0
3 years ago
water droplets tend to have a spherical, round shape, Explain ths fact in terms of the polar nature of water molecules
Doss [256]
What does it happen in smallest scale? 
<span>You have to look for "DUPRE' EQUATION" which treat about </span>
<span>"TWO-PHASE INTERFACIAL FORCEs". </span>
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<span>In your case, Water's Droplet is a liquid phase surrounded by Air (e.g. gas phase) and Interfacial Forces act to dominate Boundary-Surface. </span>
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6 0
3 years ago
A = ε l c. (a) Define the terms in the formula: A = ε l c. (Pick your answers using the letter of the correct definition.)
VladimirAG [237]

Explanation:

Using Beer-Lambert's law :

Formula used :

A=\epsilon \times c\times l

where,

A = absorbance of solution

c = concentration of solution

l = length of the cell

\epsilon = molar absorptivity of this solution

According to question:

A = (C) : absorbance measured by the spectrometer

c = (B) : concentration, in mol/L, of the stock solution from which the sample was made

l = (A): pathlength of light through the cell

ε =  (D) : molar absorptivity, a constant unique to that substance at that wavelength

7 0
3 years ago
How many formula units make up 20.6 g of magnesium chloride (MgCl2)?
irina [24]

Answer:The formula of magnesium chloride is MgCl2 . The molar mass of MgCl2 is (24.30 + 2 × 35.45) g/mol=95.20 g/mol .

Explanation:

5 0
3 years ago
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