What kind of observations can indicate a transfer of energy has taken<br> place in a reaction?

Help please! What is the mass of the iron (Fe) involved in this reaction? Identify the following equations as balanced or unbala

eimsori [14]

<h2>Question 1:</h2><h3>32g + <u><em>56g</em></u> --> 88g</h3>

This one's just a simple math problem. Do 88 - 32, which is 56. You can also find the same answer by looking for the atomic mass of iron (Fe), which rounds up to 56.

<h2>Question 2:</h2><h3>This equation is <u><em>balanced</em></u>.</h3>

On the left side, there is 2 Nitrogen (because of the subscript), and 6 Hydrogen (3 x 2 = 6). On the right side, there is 2 Nitrogen (because of the coefficient), and 6 Hydrogen. (2 x 3 again) There are 2 Nitrogen and 6 Hydrogen on each side, therefore the equation is balanced.

<h2>Question 3:</h2><h3>This equation is <em><u>unbalanced.</u></em></h3>

On the left side, there are 2 Nitrogen (N) and 2 Hydrogen (H). On the right side, there is 1 Nitrogen and 6 Hydrogen. There are 2 Nitrogen and 2 Hydrogen on one side, while the other only has 1 Nitrogen and 6 Hydrogen. Therefore the equation is unbalanced.

<h2>Question 4:</h2><h3>This equation is <em><u>balanced.</u></em></h3>

On the left side, there are 2 Chromium (Cr) and 6 Chlorine (Cl). On the right side, there are 2 Chromium and 6 Chlorine. There are 2 Chromium and 6 Chlorine on each side, therefore the equation in balanced.

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If something is confusing or doesn't make any sense, feel free to let me know! ^^

6 0

4 years ago

20% humidity is a low level which means there would be less of a chance of it

8090 [49]

Answer: True

Explanation:

5 0

3 years ago

Which is a form of kinetic energy

Evgesh-ka [11]

Answer:

there are several types of Kinetic Energy: radiant, thermal, sound, electrical and mechanical.

Explanation:

Radiant energy is energy that travels in waves Its given off by electromagnetic radiation

Thermal energy results in an object or a system having a temperature that can be measured but it has to have motion

Sound a mechanical wave and as such consists physically in oscillatory elastic compression and in oscillatory displacement of a fluid

Electrical When you let go of that ball and let it fall, the potential energy converts into kinetic energy

Mechanical is the result of its motion

5 0

3 years ago

24 = 6(-x - 3) I'm very lost

Goryan [66]

Answer: x= -8

Explanation:

24=6x-18

24=-6x-18

+18 +18

42=-6x

— —

-6 -6

-8=x

x=-8

4 0

3 years ago

An analytical chemist weighs out of an unknown diprotic acid into a volumetric flask and dilutes to the mark with distilled wate

finlep [7]

Answer:

97.9 g/mol

Explanation:

<em>There is some info missing. I think this is the original question.</em>

<em>An analytical chemist weighs out 0.188 g of an unknown triprotic acid into a 250 mL volumetric flask and dilutes to the mark with distilled water. He then titrates this solution with 0.0600 M NaOH solutions. When the titration reaches the equivalence point, the chemist finds he has added 95.9 mL of NaOH solution. </em>

<em> Calculate the molar mass of the unknown acid.</em>

Let's consider the neutralization between a generic triprotic acid and NaOH.

H₃X + 3 NaOH → Na₃X + 3 H₂O

The moles of NaOH that reacted are:

0.0600 mol/L × 0.0959 L = 0.00575 mol

The molar ratio of NaOH to H₃X is 3:1. The moles of H₃X are 1/3 × 0.00575 mol = 0.00192 mol.

The molar mass of the acid is:

0.188 g / 0.00192 mol = 97.9 g/mol

3 0

4 years ago

What kind of observations can indicate a transfer of energy has taken place in a reaction?