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3 years ago

How do different forms of transportation meet people’s transportation needs?

Chemistry

1 answer:

dalvyx [7]3 years ago

6 0

If theres an all of the above option then I'll pick that if not then, ships

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Which of the following is and example of a chemical change

givi [52]

Hi! where are the options?

6 0

2 years ago

100 points plus i'll mark brainliest

sdas [7]

I think the answer is 98 grams

5 0

3 years ago

A 0.150-kg sample of a metal alloy is heated at 540 Celsius an then plunged into a 0.400-kg of water at 10.0 Celsius, which is c

Zarrin [17]

Answer:

$C_{alloy}=0.497\frac{J}{g\°C}$

Explanation:

Hello there!

In this case, according to this calorimetry problem on equilibrium temperature, it is possible for us to infer that the heat released by the metal allow is absorbed by the water for us to write:

$Q_{allow}=-(Q_{water}+Q_{Al})$

Thus, by writing the aforementioned in terms of mass, specific heat and temperature, we have:

$m_{alloy}C_{alloy}(T_{eq}-T_{alloy})=-(m_{water}C_{water}(T_{eq}-T_{water})+m_{Al}C_{Al}(T_{eq}-T_{Al})$

Then, we solve for specific heat of the metallic alloy to obtain:

$C_{alloy}=\frac{-(m_{water}C_{water}(T_{eq}-T_{water})+m_{Al}C_{Al}(T_{eq}-T_{Al})}{m_{alloy}(T_{eq}-T_{alloy})}$

Thereby, we plug in the given data to obtain:

$C_{alloy}=\frac{-(400g*4.184\frac{J}{g\°C} (30.5\°C-10.0\°C)+200g*0.900\frac{J}{g\°C}(30.5\°C-10.0\°C)}{150g(30.5\°C-540\°C)} \\\\C_{alloy}=0.497\frac{J}{g\°C}$

Regards!

3 0

2 years ago

A certain indicator has a color chart that shows that when the indicator is yellow, the solution is acidic. What is true about a

bija089 [108]

It’s acidic?
It tastes sour
It has at least one hydrogen molecule

4 0

3 years ago

1. Describe the correlation between acid concentration and reaction rate and use ideas about particles to explain the correlatio

Nostrana [21]

Explanation:

an increase in concentration increases the rate of the reaction. This is because there are more reactant particles available which allows for more effective collisions between reactant particles in a given period of time. More effective collisions bring about a faster rate of reaction.

5 0

2 years ago