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AnnyKZ [126]
3 years ago
13

who reported four “element” classifications, but included some substances that were combinations of elements rather than true el

ements in his listing? henry moseley dmitri mendeleev antoine lavoisier johann dobereiner
Chemistry
2 answers:
neonofarm [45]3 years ago
8 0

the correct answer is C <em>Antoine Lavoisier</em>

kozerog [31]3 years ago
7 0
Answer: Antoine Lavoisier.

He classified the elements into four groups: elastic fluids, nonmetals, metals and earths. Some of the called elementes were not really elements (light and heat). Others were compounds, e.g. hydrochloric acid.






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What is the percent yield of ferrous sulfide if the actual yield is 220.0 g and the theoretical yield is 275.6 g?
BaLLatris [955]
<h2>Hello!</h2>

The answer is:

The third option, 79.8%

<h2>Why?</h2>

To calculate the percent yield we need to divide the actual yield by the theoretical yield, and then, multiply it by 100 in order to find the percent.

So, we from the statement we know the following information:

ActualYield=220.0g\\TheoreticalYield=275.6g

Let's use the following formula and substitute the given information:

PercentYield=\frac{ActualYield}{Theoretical}*100\\\\

PercentYield=\frac{220g}{275.6g}*100=0.798*100=79.8(percent)

Hence, we have that the correct option is the third option, the percent yield is 79.8%.

Have a nice day!

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3 years ago
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Answer:

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5 0
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You have two containers at 25°C and 1 atm. One has 22.4 L of hydrogen gas, and the other has 22.4 L of oxygen gas.
olga_2 [115]

Both containers have the same number of molecules= 5.62 x 10²³

<h3>Further explanation</h3>

Given

22.4 L of hydrogen gas

22.4 L of oxygen gas

25°C and 1 atm.

Required

true statement

Solution

Conditions at T 25 ° C and P 1 atm are stated by RTP (Room Temperature and Pressure). Vm in this condition = 24 liters / mol

and from Avogadro's Law :

<em>At the same temperature and pressure, the ratio of gas volume will be equal to the ratio of gas moles  </em>

So two gas have the same molecules

1 mol = 6.02 x 10²³ molecules

24 L = 1 mol, so for 22.4 L :

\tt \dfrac{22.4~L}{24~L}\times 6.02\times 10^{23}~molecules=5.62\times 10^{23}~molecules

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3 years ago
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nlexa [21]

Answer:

.08 L or 80 ml

Explanation:

Use the equation V/t = V/t.

.04L / 150K = V / 300K

.04 / 150 * 300 = V

.08 L or 80 ml

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Can the same fertilizer be applied to all types of soil ? Explain​
Arte-miy333 [17]
You cant use the same fertilizer for all soils bc differnt soils have different nutrients like lets say ur growing tomatoes with cabbage it wouldnt work bc they need different nutrients for them to grow. This is used with trees, veggies, plants and fruits. it is true somw can use the same fertilizer if they can be grown with it. if you give it the wrong nutrients it can die or not grow
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