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3 years ago

Directions:

Chemistry

2 answers:

sladkih [1.3K]3 years ago

7 0

Answer:

a) F; Insulator

b) F; are always moving

c) T, T, T

d) T, T, T

2. b; firm and not readily movable

3. a; occupied

Temperature: =

Thermal energy: <

sentences: 14, 15

5. cool

sentence: 21

6. radiation; the heat from the heating coil is radiated to the cake and causes it to rise

(though if you really want to sound smart you can explain how all of them are used) (radiation: heating coil; convection: hot air circulating in the oven; conduction: cake pan to cake)

7. conduction; the heat from oatmeal is transferred to the bowl through contact

8. convection; the air is circulated due to uneven heating (of the earth by the sun)

9. <em><u>(rephrase this answer in your own words)</u></em>

jacket: Insulator; prevents heat loss from the cold outside air
sleeping bag: insulator; keeps me warm at night while it is cold outside of it
cooking pans: conductor; heat from the flame (of a stove) is transferred to the pan to cook food; it would be very inefficient to use an insulator for something that needs to transfer heat

(metal) tent stakes: get cold fairly quickly in the cold air, if they were insulators then they would not change in temperature so quickly

10. as the wax melts and turns to liquid the particles drastically speed up to the point where they begin to flow around each other

Vera_Pavlovna [14]3 years ago

6 0

Answer:

a) F; Insulator

b) F; are always moving

c) T, T, T

d) T, T, T

2. b; firm and not readily movable

3. a; occupied

Temperature: =

Thermal energy: <

sentences: 14, 15

5. cool

sentence: 21

6. radiation; the heat from the heating coil is radiated to the cake and causes it to rise

(though if you really want to sound smart you can explain how all of them are used) (radiation: heating coil; convection: hot air circulating in the oven; conduction: cake pan to cake)

7. conduction; the heat from oatmeal is transferred to the bowl through contact

8. convection; the air is circulated due to uneven heating (of the earth by the sun)

9. (rephrase this answer in your own words)

jacket: Insulator; prevents heat loss from the cold outside air

sleeping bag: insulator; keeps me warm at night while it is cold outside of it

cooking pans: conductor; heat from the flame (of a stove) is transferred to the pan to cook food; it would be very inefficient to use an insulator for something that needs to transfer heat

(metal) tent stakes: get cold fairly quickly in the cold air, if they were insulators then they would not change in temperature so quickly

10. as the wax melts and turns to liquid the particles drastically speed up to the point where they begin to flow around each other

Explanation:

I hope this helps

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3 years ago

How many moles of sodium hydroxide would react with 1 Mole of sulphuric acid?

Paul [167]

Answer:

Two moles.

Explanation:

Sulphuric (sulfuric) acid $\rm H_2SO_4$ is a diprotic acid. When one mole of $\rm H_2SO_4$ molecules dissolve in water, two moles of $\rm H^{+}$ ions would be produced.

$\rm H_2SO_4 \to 2\, H^{+} + {SO_4}^{2-}$ .

On the other hand, sodium hydroxide $\rm NaOH$ is a monoprotic base. When one mole of $\rm NaOH$ formula units dissolve in water, only one mole of hydroxide ions $\rm OH^{-}$ would be produced.

$\rm NaOH \to Na^{+} + OH^{-}$ .

Note that $\rm H^{+}$ and $\rm OH^{-}$ react at a one-to-one ratio:

$\rm H^{+} + OH^{-} \to H_2O$ .

As a result, it would take $2\; \rm mol$ of $\rm OH^{-}$ to react with the $\rm 2\; mol$ of $\rm H^{+}$ that was released when $1\; \rm mol$ of $\rm H_2SO_4$ is dissolved in water. Since one mole of $\rm NaOH$ formula units could produce only one mole of $\rm OH^{-}$ , it would take $\rm 2\; mol$ of $\rm NaOH$ formula units to produce that $2\; \rm mol$ of $\rm OH^{-}$ for reacting with $1\; \rm mol$ of $\rm H_2SO_4$ .