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Dmitrij [34]
3 years ago
8

Write the word equation for

Chemistry
2 answers:
cestrela7 [59]3 years ago
4 0

Answer:

NaHCo3+Na2So4---Nna2So4+H2O+CO2

Naddik [55]3 years ago
4 0

Answer:

sodium two sulphate+Carbondioxed gas +water

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Did Pb2+ react with KI? Yes or No? State the reason of your answer.
madam [21]
Yes, Pb2+ react with KI.

Pb2+ is lead (II) ion
KI is a compound. It is a combination of potassium (K) and iodine (I). It is called potassium iodide.

Both potassium and iodine are highly reactive elements. Thus, when they are combined with another element like Pb2+, Pb2+ reacts with KI
4 0
4 years ago
Read 2 more answers
What are coefficients?
timama [110]
Coefficients are numbers in front of variables.
For example, in y=2x, the coefficient is 2.
In the case of chemistry, the coefficient is in front if a chemical symbol and is used to balance a chemical reaction.
Example: O2 + Fe= Fe2O3 (with Fe having a +3 ion)
To balance use the following coefficients:
3O2+4Fe=2Fe2O3
Hope this helps!
5 0
3 years ago
The air temperature in a sealed, insulated box.. 20°C An ice cube at O'C is
Elza [17]

Answer:

Melting is endothermic, so the air temperature decreases.

Explanation:

Hello there!

In this case, according to the given statement, it is possible to infer that the ice is melt because energy is applied to the ice and thereafter its temperature increases; this is possible because the joined particles of a solid substance need energy to undergo such a separation that they become more far away to each other and therefore transcend to the liquid phase due to the new molecules arrangement. Thus, the answer is Melting is endothermic, so the air temperature decreases because as the ice heats up, the air cools down as it gives it energy to the ice.

Best regards!

8 0
3 years ago
Brianliest for whoever gets this right with step by step method
Sav [38]

Answer:

<h3><em>Iron(III) oxide-hydroxide or ferric oxyhydroxide is the chemical compound of iron, oxygen, and hydrogen with formula FeO. The compound is often encountered as one of its hydrates, FeO·nH ₂O [rust].</em></h3>

<h3><em>PLEASE</em><em> </em><em>MARK</em><em> </em><em>AS</em><em> </em><em>BRAINLIEST</em><em> </em><em>ANSWER</em><em> </em></h3>

3 0
3 years ago
The volume of a sample of water is 2.5 milliliters (mL). The volume of this sample in liters (L) is 
zvonat [6]
<span>If the volume of a sample of water is 2.5 milliliters, the volume of this sample in liters is A.) 2.5 x 10^-3 L. 1 mL = 1 x 10^-3 L. 2.5 mL = x L. Make a proportion. 1 mL : 1 x 10^-3 L = 2.5 mL : x. x = 2.5 mL * 1 x 10^-3 L : 1 mL. x = 2.5 x 10^-3 L. Therefore, 2.5 mL = 2.5 x 10^-3 L.</span>
6 0
3 years ago
Read 2 more answers
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