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3 years ago

What phenomenon is most responsible for ocean layers?

Chemistry

2 answers:

igomit [66]3 years ago

7 0

Answer:

precipitations

Explanation:

bcoz of water

vova2212 [387]3 years ago

3 0

Precipitations , is the most respionsible for ocean layers

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What is the mass of the hydrogen peroxide that exactly fills a 200.0 mL container? The density of ethyl alcohol is 0.789 g/mL.

Tom [10]

Answer:

290 g of hydrogen peroxide would fill the 200.0 mL container

Explanation:

Given data:

Volume = 200.0 mL

Mass of hydrogen peroxide = ?

Solution:

Density of hydrogen peroxide is 1.45 g/cm³.

Density:

Density is equal to the mass of substance divided by its volume.

Units:

SI unit of density is Kg/m3.

Other units are given below,

g/cm3, g/mL , kg/L

Formula:

D=m/v

D= density

m=mass

V=volume

Now we can determine the mass of hydrogen peroxide.

D = m/v

1.45 g/cm³ = m/ 200.0 mL

1 mL = 1 cm³

m = 1.45 g/cm³× 200.0 cm³

m = 290 g

So 290 g of hydrogen peroxide would fill the 200.0 mL container.

5 0

4 years ago

Ethyl ethanoate undergoes following reaction [on the picture]

vichka [17]

<u>Answer:</u> The concentration of ethyl ethanoate at equilibrium is $0.653mol/dm^3$

<u>Explanation:</u>

Given values:

Equilibrium concentration of ethanol = $0.42mol/dm^3$

Equilibrium concentration of ethanoic acid = $0.42mol/dm^3$

$K_c=0.27$

The given chemical equation follows:

$CH_3COOC_2H_5+H_2O\rightleftharpoons C_2H_5OH+CH_3COOH$

The expression of $K_c$ for above equation follows:

$K_c=\frac{[C_2H_5OH][CH_3COOH]}{[CH_3COOC_2H_5]}$

Putting values in above expression, we get:

$0.27=\frac{0.42\times 0.42}{[CH_3COOC_2H_5]}$

$[CH_3COOC_2H_5]=\frac{0.42\times 0.42}{0.27}=0.653mol/dm^3$

Hence, the concentration of ethyl ethanoate at equilibrium is $0.653mol/dm^3$

5 0

3 years ago

Choose ALL

lara31 [8.8K]

Answer:

protists

animals

fungi

plants

Explanation:

i took the test let me know if im wrong tho

8 0

3 years ago

Approximately how many ice cubes must melt to cool 650 milliliters of water from 29°C to 0°C? Assume that each ice cube contains

qwelly [4]

Answer : The number of ice cubes melt must be, 13

Explanation :

First we have to calculate the mass of water.

$\text{Mass of water}=\text{Density of water}\times \text{Volume of water}$

Density of water = 1.00 g/mL

Volume of water = 650 mL

$\text{Mass of water}=1.00g/mL\times 650mL=650g$

Now we have to calculate the heat released on cooling.

Heat released on cooling = $m\times c\times (T_2-T_1)$

where,

m = mass of water = 650 g

c = specific heat capacity of water = $4.18J/g^oC$

$T_2$ = final temperature = $29^oC$

$T_2$ = initial temperature = $0^oC$

Now put all the given values in the above expression, we get:

Heat released on cooling = $650g\times 4.18J/g^oC\times (29-0)^oC$

Heat released on cooling = 78793 J = 78.793 kJ (1 J = 0.001 kJ)

As, 1 ice cube contains 1 mole of water.

The heat required for 1 ice cube to melt = 6.02 kJ

Now we have to calculate the number of ice cubes melted.

Number of ice cubes melted = $\frac{\text{Total heat}}{\text{Heat for 1 ice cube}}$

Number of ice cubes melted = $\frac{78.793kJ}{6.02kJ}$

Number of ice cubes melted = 13.1 ≈ 13

Therefore, the number of ice cubes melt must be, 13

3 0

4 years ago

Cohesion is the tendency for the same type of molecules to stick together. TRUE or FALSE

Sergio039 [100]

True

cohesion is the tendency for the same type of molecules to stick together!

5 0

3 years ago