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alexandr1967 [171]
3 years ago
11

PLEASE HELP MEEE!!! A group of students performed an experiment in which they dropped a cube of metal into a graduated cylinder

of water. The initial temperature of the water was 25 °C. The mass of the water was 50 g
Aher energy in the form of heat was transferred to the water, its temperature was 35 "C. Based on the evidence, how much energy was transferred between the metal and the water?
2 cal
10 cal
50 cal
500 cal
Chemistry
1 answer:
lianna [129]3 years ago
7 0

Answer:

10 cal

Explanation:

No Explanation

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A ____________ is a physical combination of things that can be separated. mixture compound
Degger [83]

Answer:

mixture

Explanation:

A mixture is something that can be separated, while a compound is something that can be separated (unless by chemicals).

An example of a mixture would be trail mix. You can separate the components without using chemicals.

~theLocoCoco

4 0
4 years ago
What is the ph of a solution that results from mixing 25 ml of 0.15 M hcl to 25 ml of 0.52 m nh3?
BartSMP [9]

Answer:

7.00

Explanation:

When the solutions are mixed, the HCl dissociates to form the ions H+ and Cl-. The ion H+ will react with the NH3 to form NH4+. The stoichiometry for this is 1 mol of HCl to 1 mol of H+ to 1 mol of Cl-, and 1 mol of H+ to 1 mol of NH3 to 1 mol of NH4+.

First, let's find the number of moles of each one of them, multiplying the concentration by the volume:

nH+ = 0.15 M * 25 mL = 3.75 mmol

nNH3 = 0.52 M * 25 mL = 13 mmol

So, all the H+ is consumed, and the neutralization is completed, thus pH will be the pH of the solvent (water), pH = 7.00.

5 0
3 years ago
What is the molecular formula of a compound with an empirical formula of C4H9 and a gram-formula mass of 114.0 g/mole?
hodyreva [135]
The formula is easy:

Gram formula mass
----------------------------
Emprical Formula

So if we plug in our own numbers,

114.0
--------
57.116 

We get an answer of 1.99, which rounds to 2.
Then, we distribute based off of our empirical formula.

2(C4H9) becomes C8H18.

Our molecular formula is C8H18.
Hope I could help!
6 0
4 years ago
Write short note on
WITCHER [35]

I hope it helps you ❤️❤️❤️❤️

4 0
3 years ago
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Leno4ka [110]
In acidic solutions you have H+ but in basic solutions you have OH-.
You need know that for to balance the reaction.
3 0
3 years ago
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