Which is a natural cause of soil erosion? a.deforestationb.overgrazingc.agricultured.moving watere.construction

An electrolytic cell transferred 0.10 m o l of electrons when a constant current of 2.0 A was applied. How many hours did this t

marusya05 [52]

Answer:

1.34 hr

Explanation:

From the question given above, the following data were obtained:

Number of mole of electron (e) = 0.1 mole

Current (I) = 2 A

Time (t) =?

Next, we shall determine the quantity of electricity transferred. This can be obtained as follow:

1 mole of electron = 96500 C

Therefore,

0.1 mole of electron = 0.1 × 96500

0.1 mole of electron = 9650 C

Thus, 9650 C of electricity was transferred.

Next, we shall determine the time. This can be obtained as follow:

Current (I) = 2 A

Quantity of electricity (Q) = 9650 C

Time (t) =?

Q = It

9650 = 2 × t

Divide both side by 2

t = 9650 / 2

t = 4825 s

Finally, we shall convert 4825 s to hour. This can be obtained as follow:

3600 s = 1 hr

Therefore,

4825 s = 4825 s× 1 hr / 3600 s

4825 s = 1.34 hr

Thus, the time taken is 1.34 hr

3 0

3 years ago

Which compound has the lowest melting point? • CuO • C6H12O6 K2Cr2O7 • BaCl2

ss7ja [257]

CuO is the best answer

8 0

3 years ago

A farmer wants to know if a new pesticide will produce better tomatoes than

iogann1982 [59]

Answer:

D. Using the new pesticide produces bigger tomatoes than using the

old pesticide.

Explanation:

This hypothesis is best to test for the effect of the new pesticide on the tomato plant.

A pesticide is chemical formulation used to kill pests of farm crops.

Pests prevents the healthy and proper growth of plants thereby resulting in poor yield on the farm.

For the farmer to ascertain the effect of the pesticide on his farm crop, he must compare the yield of his produce. Some tomato might grow well but would not bear good fruit. If the farmer focuses on the fruit produced, he would have derieved a good hypothesis in his experiment.

4 0

4 years ago

Which cell structure is correctly paired with its primary function?

Butoxors [25]

Answer:

C

Explanation:

Mitochondria provides energy (ATP) for cells to use

Nucleus provides genetic code (DNA)

Ribosomes assemble amino acids chains based on the DNA from nucleus to form proteins

6 0

4 years ago

Classify the compound below as an alkane, alkene, alkyne, alcohol, aldehyde, amine, and so forth

Gnoma [55]

Answer:

Organic compounds are those which are derivatives of hydrocarbons. They are classified into following functional groups.

Alkane:

Alkane are simplest hydrocarbons.
They have general formula CnH2n+2. These hydrocarbons contain single bond.
For example ethane , H3C----CH3.

Alkene:

Alkene are most reactive.
They have general formula CnH2n.
These contain double bond in their structure.
For example , ethene, H2C=CH2

Alkyne:

These are less less reactive as compare to alkenes.
They have general formula CnH2n-2.
They contain triple bonds in their structure.
For example Acetylene HC≡CH

Alcohol:

Alcohol have functional group OH. They have general formual R---OH, R may be alkyl group.For example Ethanol H3CH2C---OH

Amine:

Amine contain NH2 F.G.
They have general formula R---NH2.
There are three types of amine like primary, secondary and tertiary amine.
For example H3CH2C---NH2

Aldehyde:

Aldehydes have CHO F.G .
They have general formula R--CHO.
For example H3CH2C---CHO

Ketone:

Ketones have R--CO--R functional group.
For example acetone H3C---CO---CH3

Carboxylic acid:

They functional group COOH.
Their general formula is R---COOH.
For example Acetic acid H3C---COOH

6 0

3 years ago