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3 years ago

Helpz mez plzz pwzzzzz

Chemistry

1 answer:

Basile [38]3 years ago

3 0

Try out earthquake epicenter

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Will mark brainliest if answered fast enough.

stepan [7]

Answer:

the answer is 1,3,5 and 6 :)

Explanation:

3 0

3 years ago

Read 2 more answers

A golf ball and bowling ball are moving and both have the same kinetic energy.Which one is moving faster? If they move at the sa

Gnoma [55]

It is the bowling ball because it is heavy.

3 0

3 years ago

Based on the results from this experiment, predict whether some of the following combinations of compounds would precipitate or

iren [92.7K]

Answer:

* No precipitate: $LiOH(aq)+NaCl(aq)\rightarrow LiCl(aq)+NaOH(aq)$

* Precipitate: $3BaCl_2(aq) +2Na_3PO_4(aq) \rightarrow Ba_3(PO_4)_2(s)+6NaCl(aq)$

* Precipitate: $MgSO_4(aq)+2KOH(aq)\rightarrow Mg(OH)_2(s)+K_2SO_4(aq)$

Explanation:

Hello!

In this case, since these all are double displacement reactions, in which the cations and anions are exchanged, we can write the resulting chemical reactions as follows:

a. LiOH and NaCl: No precipitate is formed since LiOH and NaOH are both largely soluble in water:

$LiOH(aq)+NaCl(aq)\rightarrow LiCl(aq)+NaOH(aq)$

b. BaCl2 and Na3PO4: barium phosphate precipitate is formed because it has a large molar mass which makes it insoluble in water:

$3BaCl_2(aq) +2Na_3PO_4(aq) \rightarrow Ba_3(PO_4)_2(s)+6NaCl(aq)$

c. MgSO4 and KOH: magnesium hydroxide "milky" precipitate is formed because it is not soluble in water:

$MgSO_4(aq)+2KOH(aq)\rightarrow Mg(OH)_2(s)+K_2SO_4(aq)$

Moreover, we can relate the solubility of a substance by considering its polarity, molar mass and nature; usually, heavy substances tend to be insoluble in water as well as nonpolar compounds.

Best regards!

6 0

3 years ago

A 5.0-gram sample of Fe(s) is to be placed in 100. milliliters of HCl(aq). Which changes will result in the fastest rate of reac

sveta [45]

The answer is <span>increasing the surface area of Fe(s) and increasing the concentration of HCl(aq).

the rate of reaction can be increased if the interaction between the reactants in better. by increasing the surface area of a solid, such as Fe, you make more possible each molecule of Fe to interact with HCl. Also, by increasing the concentration of HCl, it mean there is more molecule of HCl to interact with Fe.</span>

6 0

3 years ago

Chemistry compound empirical formula and identify compounds weightWhich drug is c3 h3 01

valkas [14]

The drug C3H30 is called allenolate / 1-hydroxycyclopropyl

weight is 55.06g/mol

5 0

1 year ago