Ask question

Ask question

All categories

3 years ago

5

opisz jak rozdzielisz następujące mieszaniny na składniki z których powstały (nie zapomnijcie użyć nazw metod ): - mąka z groche

m - woda z olejem - woda z octem - woda z solą i mielonym pieprzem

1 answer:

Alenkinab [10]3 years ago

4 0

Answer:

what kind of cheistry is that?

Explanation:

You might be interested in

Elena L [17]

Answer:

no it should not that place is historical and so they should make where u can visit but protect it as a historical landmark

3 0

3 years ago

How will you test for the gas which is liberated when hcl reacts with an active metal ?

DENIUS [597]

When HCl reacts with a metal, hydrogen gas will be evolved. To test this gas, insert a burning splinter into the outlet of gas, the flame will be extinguished with a pop sound. This will confirm the gas is hydrogen.

8 0

3 years ago

Which power source directs the electrons from oxidation-reduction reactions to flow through a device to give the device power? O

Lady bird [3.3K]

Answer:

B. A battery.

Explanation:

I just took the test

4 0

3 years ago

Which is a characteristic of all ions?

Brut [27]

Answer:

I guess B They have a charge

7 0

3 years ago

If you have 250 mL of 0.75 M LINO2.<br> How many grams of this substance<br> would you have?

Vesna [10]

Mass of this substance = 9.928 g

<h3>Further explanation</h3>

Molarity is a way to express the concentration of the solution

Molarity shows the number of moles of solute in every 1 liter of solute or mmol in each ml of solution

$\large{\boxed {\bold {M ~ = ~ \frac {n} {V}}}$

Where

M = Molarity

n = Number of moles of solute

V = Volume of solution

So to find the number of moles can be expressed as

$\boxed{\bold{n=V\times M}}$

mol of substance -Lithium nitrite - LiNO₂ :

V = 250 ml = 0.25 L

M = 0.75 M

$\tt n=0.25\times 0.75=0.1875$

So mass of this substance - LiNO₂ (MW=52,947 g/mol) :

$\tt mass=mol\times MW\\\\mass=0.1875\times 52,947 g/mol\\\\mass=9.928~g$

4 0

3 years ago