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3 years ago

An analysis of physical, chemical and microscopic properties of urine is called?

Chemistry

2 answers:

oksano4ka [1.4K]3 years ago

5 0

Answer:

urinalysis

Explanation:

Alecsey [184]3 years ago

3 0

Answer: Urinalysis is the physical, chemical, and microscopic examination of urine. It involves a number of tests to detect and measure various compounds that pass through the urine.

Explanation: Microscopic urinalysis is done simply pouring the urine sample into a test tube and centrifuging it (spinning it down in a machine) for a few minutes. ... Examination is then performed through the microscope at higher power to further identify any cells, bacteria and clumps of cells or debris called casts.

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The use of more advanced tools made of stone, wood, and bone, such as the ones illustrated below, was typical of which period of

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Paleolithic Era
During the Paleolithic Era, early humans used mostly stone tools but at times also used wood or bone tools.

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3 years ago

State whether the sign of the entropy change expected for each of the following processes will be positive or negative, and expl

Strike441 [17]

Answer:

a) ΔS is negative

b) ΔS is positive

c) ΔS is positive

d) ΔS is negative

Explanation:

Entropy (S) is a thermodynamic parameter which measures the randomness or the disorder in a system. Greater the disorder more positive will be the value of entropy.

The extent of disorder increases as substances transition from the solid to the gaseous state. i.e.

S(solid) < S(liquid) < S(gas)

The entropy change for a given reaction is:

$\Delta S = S(products)-S(reactants)----(1)$

a) $PCl3(l) + Cl2(g) \rightarrow PCl5(s)$

Here the reactants are in the liquid and gas phase which have higher entropy than the product which is in the solid phase i.e. lower entropy.

Since S(product) < S(reactant), based on equation 1, ΔS will be negative.

b) $2HgO(s) \rightarrow 2Hg(l) + O2(g)$

Here the products are in the liquid and gas phase which have higher entropy than the reactant which is in the solid phase i.e. lower entropy.

Since S(product) > S(reactant), based on equation 1, ΔS will be positive.

c) $H2(g) \rightarrow 2H(g)$

Here the products and reactants are in the gas phase. However the number of moles of products is greater than the reactants

Since S(product) > S(reactant), based on equation 1, ΔS will be positive.

d) $U(s) + 3F2(g) \rightarrow UF6(s)$

Here one of the reactants is in the gas phase which corresponds to a more positive entropy compared to the product which is in the solid phase i.e. lower entropy.

Since S(product) < S(reactant), based on equation 1, ΔS will be negative.

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3 years ago

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A neutron is neutral and a proton is positive and a electron is negative

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3 years ago

Read 2 more answers

An atom has 8 electrons and a mass of 17. What would the correct symbol be?

Allushta [10]

Answer:

O₈¹⁷

Explanation:

An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.

All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. In other words we can say that negative and positive charges are equal in magnitude and cancel the each other.

In given statement there are 8 electrons it means the atomic number of given atom is 8 so it would oxygen. The atomic mass of oxygen is 16 while in given statement mass is 17 it means it is the isotope of oxygen that have one more neutron than oxygen 16.

Isotope of an element have same atomic number but different atomic mass due to different number of neutrons.

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3 years ago

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An analysis of physical, chemical and microscopic properties of urine is called?​

An analysis of physical, chemical and microscopic properties of urine is called?