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bogdanovich [222]
3 years ago
13

Please help me with these questions

Chemistry
2 answers:
Otrada [13]3 years ago
7 0
Water helps your food go inside your body instead of staying in your throat
Gnesinka [82]3 years ago
4 0
1) Agricultural purposes
2) Cooking
3) Cleaning
4) Industrial purposes
5) Boating
6) Swimming
7) Travel purposes
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B) An element whose particles are molecules.<br>​
igor_vitrenko [27]

Answer:

B.  An element whose particles are molecules.

Explanation:

3 0
3 years ago
Based on the thermodynamic properties provided for water, determine the energy change when the temperature of 0.750 kg of water
Vlad [161]

The energy change when the temperature of 0.750 kg of water decreased from 123 °C to 23.0 °C is  -313.5 kJ.

In this problem, we are dealing with specific heat which is referred to as the sum of heat per unit mass required to raise the temperature by one degree Celsius.Since we know the boiling point of water is 100°C, at 123°C, the water is steam.

The formula we are referring to for  calculating the heat energy Q

Q= m C ΔT

where m is the mass of water which is equal to 0.750  Kg, then

C is the specific heat of water equal to  4180 J/Kg °C and

ΔT is the change in temperature which is (23-123)= -100°C

So, assembling those desired values on the formula we get,

Q= 0.750 (4180) (-100)

Q=-313500

 = -313.5 kJ

To know more about specific heat refer to the link brainly.com/question/13163208?referrer=searchResults.

#SPJ1

3 0
2 years ago
2CO +0, 200, what is the mole ratio of carbon monoxide to carbon
Nastasia [14]

Answer:

B. 2.2

Explanation:

6 0
3 years ago
A mixture of 4.0g H2 (g) and He (g) in a 4.3L flask is maintained at 0°C. Determine the total pressure in the container?​
salantis [7]

Answer: 17.2 g/ml

Explanation:

4 0
4 years ago
If the hydroxide ion concentration of a solution is 3.26 x 10-6 M, is it an acidic or a basic solution?
sladkih [1.3K]

Answer: It is a basic solution with pH =8.51

Explanation:

We were given that hydroxide ion concentration [OH-] as 3.26 x 10-6 M

But We know thar

[OH-] [H+] = 1 × 10^-14

To get the Hydrogen ion [H+] concentration, we have that

[H+] = 1 × 10^-14 M/[OH-]

= 1 × 10^-14 M/3.26 x 10-6 M

    =  3.067 x 10^-9 M

But, pH = - log [H+]

Therefore,

pH = - log (3.067 x 10^-9)

pH=8.51

when  pH > 7, The solution is basic, therefore a solution with pH =8.51 is basic.

8 0
3 years ago
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