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brilliants [131]
3 years ago
6

I need help with chem. How do I know if this is balanced ?

Chemistry
1 answer:
ivanzaharov [21]3 years ago
6 0

https://www.khanacademy.org/science/chemistry/chemical-reactions-stoichiome/balancing-chemical-equations/v/balancing-chemical-equations-introduction

this will help trust me

have a good day

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SEP Analyze Data Use graphing software or draw a graph from the data in the table. Label "Heat input (joules)" on the y-axis and
galben [10]

The characteristics of the graphic representation are to find the scales and make the best graphic, in the attachment we have the points plotted

The graphical representation is one of the best methods to see the relationships between groups of data and to be able to find the functional relationships between them.

In this case, it is requested to make a scatter plot where the measured temperature is placed on the x-axis and the heat on the y-axis.

In the attachment we can see a graph with the requested data, the most important part of finding these graphs is looking for the scales

x-axis

          scale x = \frac{\Delta Values}{paper length}

y-axis

          scale y = \frac{\Delta Values}{paper \ lengthy}

In general, the paper is 20 x 30 cm, we select the shortest part as the x axis

         scale x = \frac{50-30}{20}

         scale x = 1º  \frac{ C}{cm \ peper}  

         

Let's find the scale on the axis and the maximum value is 54000 and the minimum value is 3800, as the minimum value is much less than the maximum value, let's set this value to zero

         scale y = \frac{54000-0}{30}

         scale y = 1800  \frac{j}{cm \ paper}

To facilitate marking the values, we select a slightly larger scale,

Selected scale

           scale y = 2000 \frac{j}{cm \ paper}

Let's mark the points.

From observing these graph we see;

  • The relationships are linear
  • For the same material the amount of heat necessary to reach the same temperature is proportional to the mass of the material

Using the characteristics of the graphical representation, it is possible to find the scales and make the best graph

Learn more here: brainly.com/question/12511806

6 0
3 years ago
During soldering, a mixture of metals ('solder') is heated until it melts. The molten metal falls into the gaps between two piec
Pavlova-9 [17]

Answer:

31^oC

Explanation:

Range = Highest value - Lowest value

A 'soft solder' melts between 183 °C and 212 °C.

Melting range of a 'soft solder' = 212-183=29^oC

A 'hard solder' melts between 620 °C and 680 °C.

Melting range of a 'hard solder' = 680-620=60^oC

So,

Difference in melting ranges = Melting range of a 'hard solder'  - Melting range of a 'soft solder' = 60^oC-29^oC=31^oC

4 0
3 years ago
How many moles of He are in 16 g of the element? 1.0 mol 4.0 mol 8.0 mol 16 mol
Lady bird [3.3K]

Answer: 4 Mole

Explanation:

16/4 = 4

4 0
4 years ago
A particular 3.0 L solution contains 2.5 mmol (millimoles) of a substance. What is the concentration of this solution in number
bearhunter [10]

Answer: 0.83mol/m3

Explanation:

Number of mole = 2.5 mmol = 0.0025mol

Recall

1L = 0.001m3

Therefore 3L = 3x0.001 = 0.003m3

0.003m3 contains 0.0025mol

Therefore, 1m3 will contain = 0.0025/0.003 = 0.83mol

The concentration in mol/m3 is 0.83mol/m3

8 0
3 years ago
How can weak acids and weak bases cause pH stress to cells?
telo118 [61]

Answer:

b

Explanation:

If a cell has transporters that are not well regulated, weak acids or weak bases can accumulate inside the cells and cause stress.

3 0
3 years ago
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