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Serhud [2]
3 years ago
9

Allen is carrying out reactions in a lab. One of the products in all reactions is found to be either a precipitate, a gas, or wa

ter. What is common between all these reactions?
Chemistry
2 answers:
vampirchik [111]3 years ago
4 0
Here are some examples for those type of reactions.
<span>
Combustion reaction: CH4(g) + 2 O2(g) --> CO2(g) + 2 H2O(l)
</span><span>
Decomposition reaction: CaCO3(s) ---> CaO(s) + CO2(g)

</span><span>Double replacement: AgNO3(aq) + NaCl(aq) ---> AgCl(s) + NaNO3(aq)


</span>One common thing in all is that they are reactions. They have reactants to form new substances called product.
RUDIKE [14]3 years ago
3 0

Answer:

all decomposition

Explanation:

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which statement best describes the equation caco3 2hcl → cacl2 co2 h2o? caco3 is a reactant; it is present before the reaction o
fomenos

Answer: CaCO_3 is a reactant; it is present before the reaction occurs.

Explanation:

In a chemical reaction the chemical formulas written before the arrow are described as reactants as they react together to form products which are written after the arrow.

CaCO_3 + 2HCl \rightarrow CaCl_2 + CO_2 + H_2O

Thus CaCO_3 and HCl are reactants here whereas CO_2, CaCl_2 and H_2O are products.

7 0
3 years ago
Read 2 more answers
What is the function of the sensory and motor nerves?
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Sensory nerves gather information of the environment and send it to the brain, and motor nerves tell muscles to contract, thereby making you move.

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8 0
3 years ago
A lead ball is added to a graduated cylinder containing 50.6 ml of water, causing the level of the water to increase to 93.0 mL.
Kamila [148]

42.4 ml is the volume in milliliters of the lead ball if a lead ball is added to a graduated cylinder containing 50.6 ml of water.

<h3>What is a graduated cylinder?</h3>

A tall narrow container with a volume scale is used especially for measuring liquids.

The graduated cylinder contains water

mL is a volume unit.

Water volume = 50.6 ml

The lead ball caused an increase in volume from 50.6 ml to 93.0 mL.

The new volume is the lead ball volume plus the original water volume :

Final volume = Vlead ball+ Water original volume

93.0 mL= V_(lead ball) +50.6 ml

V_(lead ball) = 93.0 mL - 50.6 ml

V_(lead ball) = 42.4 ml

Hence, 42.4 ml is the volume in milliliters of the lead ball.

Learn more about the graduated cylinder  here:

brainly.com/question/13386106

#SPJ1

4 0
2 years ago
State where the chemical potential energy released from a reaction is stored
Vlad [161]
It is stored in the bonds between atoms.
4 0
3 years ago
In a metallic bond, electrons
kobusy [5.1K]
The answer would be c
8 0
3 years ago
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