Matter either loses or absorbs energy when it changes from one state to another.
Carbon is the answer it is the main molecule in the atom
-well, we all need water as living organisms in order to live. water helps us clean our body (just like you clean yourself in a shower to clean your skin),but drinking water helps you to take a shower inside your body! (sounds weird but true XD) you get the point... here are a few things water does to our body:
- water helps helps our skin to look beautiful (you can say youthful skin) and even beauty itself.
- it trashes body waste and toxins (like i said above)
- it gives us nutrients and minerals
- it helps us to maintain out blood pressure
- it also helps to regulate our body temperature
- it transfers oxygen through the whole body
- it helps with digestion
- weigh loss
- gives you energy ( thats why when your exercising you need to drink water every 15 min XD)
-prevents from you have a stinky breath *-*
- it helps with back-pain, headaches, heart health...etc
- it helps boost your immune system
- increases your brain power
so those are what i got for you about why water is important to us :D
Answer:
0.297 °C
Step-by-step explanation:
The formula for the <em>freezing point depression </em>ΔT_f is
ΔT_f = iK_f·b
i is the van’t Hoff factor: the number of moles of particles you get from a solute.
For glucose,
glucose(s) ⟶ glucose(aq)
1 mole glucose ⟶ 1 mol particles i = 1
Data:
Mass of glucose = 10.20 g
Mass of water = 355 g
ΔT_f = 1.86 °C·kg·mol⁻¹
Calculations:
(a) <em>Moles of glucose
</em>
n = 10.20 g × (1 mol/180.16 g)
= 0.056 62 mol
(b) <em>Kilograms of water
</em>
m = 355 g × (1 kg/1000 g)
= 0.355 kg
(c) <em>Molal concentration
</em>
b = moles of solute/kilograms of solvent
= 0.056 62 mol/0.355 kg
= 0.1595 mol·kg⁻¹
(d) <em>Freezing point depression
</em>
ΔT_f = 1 × 1.86 × 0.1595
= 0.297 °C
Answer:
Explanation:
When potassium chloride reacts with lead acetate in aqueous medium, it gives white precipitate of lead chloride and potassium acetate in aqueous medium as a product.
As shown in chemical reaction given below:
