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2 years ago

What effect does the pH of water have on radish seed germination?

1 answer:

8 0

It has a high percentage of germination in pH’s 13-14 this shows that radish seeds can germinate very well in almost all pH levels

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If an element A has 3 shells and has 3 valence electrons, write formulas for the following:

Ilya [14]

Electron configuration

an element A has 3 shells and has 3 valence electrons

so electron configuration of A: 1s², 2s², 2p⁶, 3s², 3p¹

will tend to lose 3 electron to form a cation: A³⁺

a. Nitrate of A

A(NO₃)₃

b. Chloride of A

ACl₃

c. Oxide of A

A₂O₃

6 0

2 years ago

For the reaction 2H 2 +O 2 2H 2 O calculate the percent yield if 860. of water is produced when 100. g of hydrogen react with an

-BARSIC- [3]

The percent yield : 95%

<h3> Further explanation </h3>

Given

Reaction

2H₂+O₂ ⇒2H₂O

Required

The percent yield

Solution

mol of Hydrogen(as a limiting reactant) :

$\tt \dfrac{100}{2}=50$

mol H₂O based on H₂ , and from equation mol ratio H₂:H₂O=2 : 2, so mol H₂O = 50

Mass of water(theoretical yield) :

$\tt mass=50\times 18=900~g$

$\tt \%yield=\dfrac{860}{900}\times 100\%=95\%$

3 0

3 years ago

Which pair shares the same empirical formula?

MissTica

Answer:- 3. $CH_3$ and $C_2H_6$

Explanations:- An empirical formula is the simplest whole number ratio of the moles of atoms present in the compound.

If we simplify the first par formula then they becomes $CH_2$ and CH. This pair does not share the same empirical formula.

Second pair formulas are already simple and could not be further simplify. Since they are different, it is also not the right option.

Fourth pair has CH and $C_2H_4$ . $C_2H_4$ could be simplify to $CH_2$ . The two formulas are still different and so it is not the right choice.

The only correct one is third pair as one of them is $CH_3$ and other one is $C_2H_6[/tex . [tex]C_2H_6$ could be simplify to $CH_3$ . This pair share the same empirical formula, $CH_3$ .

6 0

3 years ago

True or False: All temperatures used in the comparisons or calculations of gases must use the Kelvin temperature scale.

Digiron [165]

Answer:

True

Explanation:

I used my notes from class today. I could be wrong.

6 0

3 years ago

Read 2 more answers

trace the path of a labeled carbon atom through the biological processes of photosynthesis and respiration. The atom will start

TiliK225 [7]

The carbon atom will get processed by going through the stomata of a leaf. It is then combined with energy to produce something called glocuse or a form or type of sugar. The sugar will be used as energy, tissue and starch for itself. That's basically the fate of the carbon.

6 0

3 years ago