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3 years ago

It's easiest to weigh------using a balance scale?

Chemistry

1 answer:

allsm [11]3 years ago

3 0

Yes and no it depends if your good at it you could also use a digital scale, but I perferr to use a balance scale

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What makes this lever effective?

ser-zykov [4K]

D because the rock is making it lean less to the man so that means the rock has more mass

7 0

2 years ago

Balance the following equations, and indicate whether they are combination, decomposition, or combustion reactions.1. C3H6(g)+O2

antoniya [11.8K]

Answer :

(1) This reaction is a combustion reaction.

(2) This reaction is a decomposition reaction.

(3) This reaction is a combustion reaction.

(4) This reaction is a combination reaction.

(5) This reaction is a combination reaction.

Explanation :

Combination reaction : It is a type pf reaction in which the two or more molecules combine to form a larger single molecule as a product.

Decomposition reaction : It is a type of reaction in which a single larger compound decomposes to give two or more smaller molecules as a product.

Combustion reaction : It is a type of reaction in which a hydrocarbon molecule react with the oxygen molecule to give carbon dioxide and and water as a product.

1. $C_3H_6(g)+O_2(g)\rightarrow CO_2(g)+H_2O(g)$

This reaction is a combustion reaction.

2. $NH_4NO_3(s)\rightarrow N_2O(g)+H_2O(l)$

This reaction is a decomposition reaction.

3. $C_5H_6O(l)+O_2(g)\rightarrow CO_2(g)+H_2O(g)$

This reaction is a combustion reaction.

4. $N_2(g)+H_2(g)\rightarrow NH_3(g)$

This reaction is a combination reaction.

5. $K_2O(s)+H_2O(l)\rightarrow KOH(aq)$

This reaction is a combination reaction.

5 0

4 years ago

The law of _______ of energy states that energy cannot be created or destroyed. A. transformation B. absorption C. stability D.

34kurt

The correct answer is D. Conservation

4 0

4 years ago

Novelty devices for predicting rain contain colbalt chloride and are based on the following equilibrium:

ANEK [815]

Answer:

Pink

Explanation:

In the reaction, in the left part we have two species to react, but it is not reacting yet. While the right part of the reaction, we have one specie that is the product of the addition of two differents species.

The CoCl2 when is dry (anhydrus) the apparence is a purple-blue fine powder, while it chemical absorbs water (wold be wet) the apparence is a pink coarse powder.

I hope you undersant

8 0

3 years ago

How many liters in .5 moles of co2

Alex Ar [27]

At STP, one mole of gas occupies 22.4 L of space. Assuming the conditions conform to STP
volume CO2 = 0.5 mol * 22.4 L/1 mol
= 11.2 L
= 10 L
The answer with 1 significant figure is 10 L of CO2

7 0

3 years ago