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just olya [345]
3 years ago
12

When a boy and his friends arrive at a barbecue, they offer to help their friend cook. They place meat and vegetables from the r

efrigerator onto the hot grill. When the food is cooked and taken off the grill, it is at a much higher temperature than it was before it was cooked. Which statements are true about the food? Choose the two that apply.
A. The kinetic energy of the food particles increased, causing the food temperature to rise.

B. The thermal energy of the food increased.

C. The kinetic energy of the food particles decreased, causing the food temperature to rise.

D. The thermal energy of the food decreased.
Chemistry
2 answers:
Salsk061 [2.6K]3 years ago
7 0

Answer:

Letter A, and Letter B

Explanation:

Ostrovityanka [42]3 years ago
5 0

A. The kinetic energy of the food particles increased, causing the food temperature to rise.

B. The thermal energy of the food increased

Explanation:

The grilling of the meat increased the thermal energy which cause the kinetic energy of the food particles to increase thereby causing the temperature of the food to rise.

Heat is a form of energy known as thermal energy. It results from the difference in temperature between two bodies.

When a body is heated, the particles of the medium if solid as in the case of the meat begins to vibrate about their fixed point.

Temperature is directly proportional the average kinetic energy of a particle and so the particles gain more kinetic energy.

Learn more:

Temperature and heat brainly.com/question/914750

#learnwithBrainly

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If the concentration of brown sand is 2.0 ppm, how many grains of brown sand are in the bucket?
AysviL [449]

I believe the complete given is that the bucket of sand contains 9.5 billion grains of sand. That is:

bucket = 9,500,000,000 grains

 

and the concentration of brown sand is 2 ppm:

concentration brown sand = 2 / 1,000,000

 

Therefore:

brown sand = 9,500,000,000 * (2 / 1,000,000)

<span>brown sand = 19,000 grains</span>

8 0
3 years ago
How many grams of nitric acid will react completely with a block of iron metal that is 4.5 cm by 3.0 cm by 3.5 cm, if the densit
denpristay [2]

Balance the equation first: 

2 Fe+6 HNO3→2 Fe(NO3)3+3H2

Then calculate mass of Iron :

4.5×3.0×3.5 cm3(1 mL1 cm3)(7.87 g Fe1 ml)=371.86 g Fe

Now use Stoichiometry:

371.86 g Fe×(1 mol Fe55.85 g Fe)×(6 mol HNO32 mol Fe)=19.97 mol HNO3

Convert moles of nitric acid to grams

19.97 mol HNO3×(63.01 g HNO31 mol HNO3)=1258.3 g HNO3



7 0
3 years ago
Read 2 more answers
If 14.5 kJ of heat were added to 485 g of liquid water, How much would its temperature increase?
olga55 [171]

<u>Answer:</u> The increase in temperature is 7.14°C

<u>Explanation:</u>

To calculate the change in temperature, we use the equation:

q=mc\Delta T

where,

q = heat absorbed = 14.5 kJ = 14500 J    (Conversion factor: 1 kJ = 1000 J)

m = mass of water = 485 g g

c = specific heat capacity of water = 4.184 J/g.°C

\Delta T = change in temperature = ?

Putting values in above equation, we get:

14500J=485g\times 4.184J/g.^oC\times \Delta T\\\\\Delta T=7.14^oC

Hence, the increase in temperature is 7.14°C

3 0
3 years ago
Cold packs are used to treat minor injuries. Some cold packs contain NH4NO3(s) and a small packet of water at room temperature b
Anastasy [175]
These types of reactions are called endothermic reactions. This is when the system absorbs the heat from the surrounding. In this case, the system is the chemical reaction and the environment is the direct vicinity of the chemical reaction. You notice that the pack becomes cold because heat from the surrounding is being absorb. 

The bonds involved in this substance includes ionic bonding and polar covalent. 
6 0
4 years ago
HELP!!!!!!!!!!!!!!!!
Whitepunk [10]

Hyy mate......

Here is your answer ......

<h2> ➡️⏺️Oxygen⏺️⬅️</h2>

1️⃣Name: Oxygen

2️⃣State : non-metal

3️⃣Family:Oxide

4️⃣Protons: 8

Electron:8

Neutron: 8

<u>Hope it will help you</u><u>.</u><u>.</u><u>.</u>

<u>Thanks for asking....</u>

6 0
3 years ago
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