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3 years ago

How many atoms of potassium and how

Chemistry

1 answer:

Varvara68 [4.7K]3 years ago

8 0

KOH? 6.022 x 10^23 atoms of potassium(K) are in one mole of KOH

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For which type if reaction must you use an activity series to predict the results

Paha777 [63]

Single replacement or single displacement reactions

Explanation:

In a single replacement or displacement reaction, the activity series is useful in predicting whether the reaction will take place or not.

In this reaction type, one substance is replacing another.

C + DE → CD + E

The relative positions of the two elements in the activity series provides the driving force for the single replacement reaction.
An element high up in the series will displace one that is lower in the series because it is more reactive.

Learn more:

Chemical reactions brainly.com/question/3953793

#learnwithBrainly

5 0

3 years ago

List the number of

rjkz [21]

Answer:

beryllium: 2 valence electrons

nitrogen: 5 valence electrons

oxygen: 6 valence electrons

fluorine: 7 valence electrons

magnesium: 2+ valence electrons

phosphorus: 5 valence electrons

sulfur: 6 valence electrons

chlorine: 7 valence electrons

Explanation:

6 0

3 years ago

A student with a body temperature of 37°C holds a piece of

Alika [10]

Answer:

D i think. Not sure.

Explanation:

I mean i just did it myself, and i dont really do chemistry, but I would say D sorrry if i made you get it wrong!!

6 0

3 years ago

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Which is the correct net ionic equation for the following reaction: H3PO4 (aq) + 3 LiOH (aq) > Li3PO4 (aq) + 3 H2O (l)?

torisob [31]

Answer: The correct option for the chemical equation $H_3PO_4(aq.)+3LiOH(aq.)\rightarrow Li_3PO_4(aq.)+3H_2O(l)$ is 1.

The correct option for the chemical equation $2HBr(aq.)+Co(OH)_2(aq.)\rightarrow CoBr_2(aq.)+2H_2O(l)$ is 3.

Explanation:

For the chemical equation:

$H_3PO_4(aq.)+3LiOH(aq.)\rightarrow Li_3PO_4(aq.)+3H_2O(l)$

$H_3PO_4$ is a weak acid and hence will not dissociate into ions whereas LiOH is a strong base and will easily dissociate into ions.

The product $Li_3PO_4$ is soluble in water and hence, will dissociate into its respective ions. Hence, the ionic equation for this reaction is:

$H_3PO_4(aq.)+3Li^{3+}(aq.)+3OH^-(aq.)\rightarrow 3Li^{3+}(aq.)+PO_4^{3-}(aq.)+3H_2O(l)$

Net ionic equation becomes:

$H_3PO_4(aq.)+3OH^-(aq.)\rightarrow PO_4^{3-}(aq.)+3H_2O(l)$

So, the correct option is 1.

For the chemical equation:

$2HBr(aq.)+Co(OH)_2(aq.)\rightarrow CoBr_2(aq.)+2H_2O(l)$

HBr and $Co(OH)_2$ are strong acid and strong base respectively, hence they will easily dissociate into ions.

The product, $CoBr_2$ is is soluble in water and hence, will dissociate into its respective ions. Hence, the ionic equation for this reaction is:

$2H^+(aq.)+2Br^-(aq.)+Co^{2+}(aq.)+2OH^-(aq.)\rightarrow Co^{2+}(aq.)+2Br^-(aq.)+H_2O(l)$

The net ionic equation becomes:

$H^+(aq.)+OH^-(aq.)\rightarrow H_2O(l)$

So, the correct option is 3.

4 0

3 years ago

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The chemical formula for sulfuric acid is H2SO4. In one molecule of sulfuric acid, there are _____.

erma4kov [3.2K]

Answer:

four atoms of oxygen

Explanation:

two atoms of hydrogen

one sulphur atom

5 0

3 years ago

Read 2 more answers