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never [62]
4 years ago
12

Why should you never mix unknown chemicals?

Chemistry
1 answer:
Zolol [24]4 years ago
5 0
Because it could blow up you or your house or melt everything.
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Which of these is the most powerful force of weathering and erosion?
marta [7]

Answer:

Moving water.

Explanation:

Brainliest please!

8 0
3 years ago
Read 2 more answers
to make a large quantity of a 5% solution of HCl but only have 25mL HCl. what volume of 5% solution can be made from this volume
Gelneren [198K]

Answer:What is the volume of 37% HCl?

If however you meant to say 0.025M and assuming you want to prepare 1L solution then the volume of 37% HCl needed should be= (1000 X 0.025X 36.5)/ (37X1.19X10)=2.07 mL diluted to 1 L using DI water. Good day. If you want 0.025 mole HCl solution, you should take a 2.09 ml of your acid.

Explanation:To prepare 5% solution from this acid; simply take 5 ml. of the acid and add it to 95 ml of distilled water.You get a 5%HCl solution. By the way, Hydrogen Chloride is the name designated to the gas evolved from HCl acid

7 0
3 years ago
The correct electron configuration for magnesium is: 1s 22s 22p 63s 3 True False
Dmitry [639]

Answer:

False

Explanation:

Magnesium is the element of second group and third period. The electronic configuration of magnesium is - 2, 8, 2 or 1s^22s^22p^63s^2

There are 2 valence electrons of magnesium.

Only the valence electrons are shown by dots in the Lewis structure.  

As, stated above, there are only two valence electrons of magnesium, so in the Lewis structure, two dots are made around the magnesium symbol.

Given that the electronic configuration is:- 1s^22s^22p^63s^3 .

Orbital s cannot accommodate 3 electrons and also in magnesium it has 3s^2 . Hence, the statement is false.

7 0
3 years ago
Atmospheric pressure decreases as altitude increases. In other words, there is more air pushing down on you at sea level, and th
Oksana_A [137]

Answer:

Boils first >Pentane at high altitude> Hexane at high altitude>hexane at sea level> hexanol at sea level> boils last.

Explanation:

Step 1: To boil, a liquid must overcome the attractive forces between molecules and the outside pressure pushing down on the liquid's surface.

(Hexanol> Hexane> Pentane)

Step 2: Identify which situation is most conducive to boiling

To boil, a liquid must overcome the attractive forces between molecules and the outside pressure pushing down on the liquid's surface.

In which situation would you expect the liquid to boil first, assuming equal heating.

(weak intermolecular attraction and low atmospheric pressure)  

8 0
3 years ago
If 27.9 grams of calcium carbonate reacts with excess HCl, how many moles of calcium chloride are produced
Virty [35]

Answer:

\large \boxed{\text{0.2797 mol}}

Explanation:

We must do the conversions:

mass of CaCO₃ ⟶ moles of CaCO₃ ⟶ moles of CaCl₂

We will need a chemical equation with masses and molar masses, so, let's gather all the information in one place.

Mᵣ:     100.09                  110.98

         CaCO₃ + 2HCl ⟶ CaCl₂ + CO₂ + 2HCl

m/g:     27.9

(a) Moles of CaCO₃\text{Moles of CaCO}_{3} = \text{27.9 g CaCO}_{3}\times \dfrac{\text{1 mol CaCO}_{3}}{\text{100.09 g CaCO}_{3}}= \text{0.2787 mol CaCO}_{3}

(b) Moles of CaCl₂\text{Moles of CaCl}_{2} =\text{0.2787 mol CaCO}_{3} \times \dfrac{\text{1mol CaCl}_{2}}{\text{1 mol CaCO}_{3}} = \text{0.279 mol CaCl}_{2}\text{The reaction produces $\large \boxed{\textbf{0.279 mol}}$ of CaCl}_{2}

5 0
4 years ago
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