All categories

3 years ago

Do you think the younger scientist had enough evidence for his prediction?

Chemistry

2 answers:

grin007 [14]3 years ago

5 0

You have no context to the problem

Sveta_85 [38]3 years ago

4 0

Answer:

yes

Explanation:

You might be interested in

tell how a voltaic cell works. be sure to mention the various parts of the voltaic cell and what they have to do with how it wor

Lelu [443]

Voltaic cells are used as a source of electrical power. By their nature, they produce direct current.
A voltaic cell, or galvanic cell is an electrochemical cell that uses a chemical reaction to produce electrical energy. The cell consists of two metals: one called anode where oxidation (loss of electrons) occurs and the other cathode where reduction (gain of electrons) occurs.The salt bridge connect the anode with the cathode. It is the chamber of electrolytes necessary to complete the circuit in a voltaic cell.
The external circuit is used to conduct the flow of electrons between the electrodes of the voltaic cell and includes a load.
The key to gathering the electron flow is to separate the oxidation and reduction half-reactions, connecting them by a wire, so that the electrons must flow through that wire.

4 0

4 years ago

2. Choose the best answer. Up to % of glaciers are retreating. 50 60 70 80

tankabanditka [31]

I believe it’s 60 percentage

6 0

3 years ago

Find the theoretical oxygen demand for the

never [62]

Answer:

a) 213.3 mg/L

b) 62.61 mg/L

c) 0.0225 mg/L

Explanation:

Theoretical oxygen demand (ThOD)is essentially the amount of oxygen required for the complete degradation of a given compound into the final oxidized products

a) Given:

Concentration of acetic acid, $[CH3COOH]$ = 200 mg/L

$CH3COOH + 2O2 \rightarrow 2CO2 + 2H2O$

$ThOD = \frac{mass\ O2}{mass\ CH3COOH} * conc. CH3COOH$

Based on the reaction stoichiometry:

mass of $CH3COOH$ = 60 g

mass of $O2$ = 2(32) = 64 g

$ThOD = \frac{64 g}{60 g} * 200mg/L = 213.3 mg/L$

b) Given:

Concentration of ethanol, $[C2H5OH]$ = 30 mg/L

$C2H5OH + 3O2 \rightarrow 2CO2 + 3H2O$

$ThOD = \frac{mass\ O2}{mass\ C2H5OH} * conc. C2H5OH$

Based on the reaction stoichiometry:

mass of $C2H5OH$ = 46 g

mass of $O2$ = 3(32) = 96 g

$ThOD = \frac{96 g}{46 g} * 30mg/L = 62.61 mg/L$

c) Given:

Concentration of sucrose, $[C12H22O11]$ = 50 mg/L

$C12H22O11 + 12O2 \rightarrow 12CO2 + 11H2O$

$ThOD = \frac{mass\ O2}{mass\ C22H22O11} * conc. C12H22O11$

Based on the reaction stoichiometry:

mass of $C12H22O11$ = 342 g

mass of $O2$ = 12(32) = 384 g

$ThOD = \frac{384 g}{342 g} * 50mg/L = 0.0225 mg/L$

7 0

4 years ago

Based on the lesson how are individuals and economics similar

ivann1987 [24]

Answer:

HI!!

Explanation:

The correct answer is A) they both must decide how to allocate resources. Based on the lesson, individuals and economies are similar because both must decide how to allocate resources.

6 0

3 years ago

Identify the gas law that applies to the following scenario: A 36.5 liter balloon holding 2.9 moles of carbon dioxide leaks. If

Ksenya-84 [330]

Answer:

Avogadro's Law

Explanation:

The amount of moles is directly proportional to the volume of the gas under constant temperature and pressure. That is the statement of Avogadro's law. The equation is:

V1n2 = V2n1

Where V is volume and n are moles of 1, initial state and 2, final state of the gas

That means, right option is:

<h3>Avogadro's Law </h3>

6 0

3 years ago