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uysha [10]
3 years ago
14

Lana is testing her hypothesis that marigolds grow faster in red light than in yellow light. If the plants in yellow light grow

faster during her experiment what should Lana do next? A. Assume that she made a mistake during the experiment B. Report that her hypothesis was useless C. Conclude that the experiment did not work D. Repeat the experiment to confirm the result​
Chemistry
1 answer:
Alinara [238K]3 years ago
7 0

Answer:

in particular, chlorophyll absorbs blue and red light while allowing green light to be reflected (or transmitted). ... If chlorophyll needs red and blue light, what do you think would happen to the plant if you were to place a green filter over your light source so that ... Think of the rainbow, what colors are there other than green?

Explanation:

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nexus9112 [7]
Subscript in a pair of brackets
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3 years ago
How many grams of lead(II) sulfate (303 g/mol) are needed to react with sodium chromate (162 g/mol) in order to produce 0.162 kg
Afina-wow [57]

Answer : The mass of PbSO_4 needed are, 1.515 grams.

Explanation :

First we have to calculate the mole of PbCrO_4.

\text{Moles of }PbCrO_4=\frac{\text{Mass of }PbCrO_4}{\text{Molar mass of }PbCrO_4}=\frac{0.162g}{323g/mole}=0.005mole

Now we have to calculate the moles of PbSO_4.

The balanced chemical reaction will be,

PbSO_4+Na_2CrO_4\rightarrow PbCrO_4+Na_2SO_4[tex]From the balanced chemical reaction, we conclude thatAs, 1 mole of [tex]PbCrO_4 produced from 1 mole of PbSO_4

So, 0.005 mole of PbCrO_4 produced from 0.005 mole of PbSO_4

Now we have to calculate the mass of PbSO_4

\text{Mass of }PbSO_4=\text{Moles of }PbSO_4\times \text{Molar mass of }PbSO_4

\text{Mass of }PbSO_4=0.005mole\times 303g/mole=1.515g

Therefore, the mass of PbSO_4 needed are, 1.515 grams.

6 0
3 years ago
Chemicals are classified as health hazards when they pose which of the following hazardous effects?
AlexFokin [52]

Answer:

poisoning, breathing problems, skin rashes, allergic reactions, allergic sensitisation, cancer, and other health problems from exposure.

Explanation:

many hazardous chemicals are also classified as dangerous goods.

4 0
2 years ago
What reactions are responsible for the glow and heat from the sun? nuclear fission nuclear fusion chemical reactions atomic disi
Mamont248 [21]
Nuclear Fusion is the answer to the question who posted.

7 0
3 years ago
Read 2 more answers
Calculate the specific heat of the substance if 373 J is required to raise the temperature of a 312 gram sample by 25°C?
I am Lyosha [343]

Explanation:

Q = 373J

∆∅ = 25°C

m = 312g

c = x

Q = mc∆∅

373 = 312(x)(25)

373 = 7800x

x = 373/7800

x = 0.0478J/(g°C)

4 0
3 years ago
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