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coldgirl [10]
4 years ago
11

Due to the hydrogen bonds between water molecules, when water freezes, it will… Select all that apply

Chemistry
1 answer:
sertanlavr [38]4 years ago
7 0
<span>i think its decrease in density</span>
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A hydrocarbon sample was burned in a bomb calorimeter. The temperature of the calorimeter and the 1.00 kg of water rose from 20.
fomenos

Answer:

The heat released by the combustion is 20,47 kJ

Explanation:

Bomb calorimeter is an instrument used to measure the heat of a reaction. The formula is:

Q = C×m×ΔT + Cc×ΔT

Where:

Q is the heat released

C is specific heat of water (4,186kJ/kg°C)

m is mass of water (1,00kg)

ΔT is temperature change (23,65°C - 20,45°C)

And Cc is heat capacity of the calorimeter (2,21kJ/°C)

Replacing these values the heat released by the combustion is:

<em>Q = 20,47 kJ</em>

6 0
3 years ago
Study the image of this rock.
AlladinOne [14]

Answer:

The characteristic best supports its formation from  sedimentary processes is "It has many layers."

Explanation:

When sediments deposit and solidifies then it results in the formation of sedimentary rocks.The given picture shows that this rock has many horizontal lines of different width and color. This shows that this rock is formed by many different layers. Thus, we can conclude that the characteristic which best supports its formation from sedimentary processes is that it has many layers. The layers present gives us an idea about the past events that has occurred for the formation of the or the deposition of the sedimentary rock.

5 0
4 years ago
Calculate the pressure exerted on the floor when an elephant who weighs 2400 N
Inessa05 [86]

Answer:

The answer is

<h3>6000 N/m² or 6000 Pa</h3>

Explanation:

The pressure exerted by an object given the force of the object and the area can be found by using the formula

P =  \frac{f}{a}  \\

where

P is the pressure

f is the force

a is the area

From the question

f = 2400 N

a = 0.4 m²

So we have

P =  \frac{2400}{0.4}  \\

We have the final answer as

<h3>6000 N/m² or 6000 Pa</h3>

Hope this helps you

8 0
3 years ago
4. To how much water should 50 mL of 12 M hydrochloric acid be added to
Novosadov [1.4K]

Answer : The volume of water added are, 15 mL

Explanation :

Formula used :

M_1V_1=M_2V_2

where,

M_1\text{ and }V_1 are the initial molarity and volume of HCl.

M_2\text{ and }V_2 are the final molarity and volume of water.

We are given:

M_1=12M\\V_1=50mL\\M_2=40M\\V_2=?

Putting values in above equation, we get:

12M\times 50mL=40M\times V_2\\\\V_2=15mL

Hence, the volume of water added are, 15 mL

7 0
3 years ago
Gas-to-liquid synfuel production can produce diesel, naptha and paraffin. The formation of these products usually involves _____
Goshia [24]
The best and most correct answer among the choices provided by the question is the second choice. <span>The formation of gas-to-liquid synfuel usually involves</span><span> the removal of carbon atoms from the fuel adding highly acidic substances such as hydrochloric acid. </span><span>I hope my answer has come to your help. God bless and have a nice day ahead!</span>
3 0
3 years ago
Read 2 more answers
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