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Alex17521 [72]
3 years ago
8

Determine which is the control group and which is the experimental group in the following scenario ( Scientists are testing a ne

w kind of aspirin to see whether it will relieve headaches. They give one group of volunteers the aspirin. They give another group of volunteers pills that look like aspirin but are actually sugar pills)
Answer this and you will get brainiest WITH NO VIRUS LINKS OR REPORT YOU
Chemistry
2 answers:
quester [9]3 years ago
7 0
The group that were given sugar pills
Daniel [21]3 years ago
3 0

Answer:

The group given the sugar pills.

Explanation:

The control group is the ones given sugar pills because they did not get the experimental aspirin

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4FeS2 + 11O2 > 2Fe2O3 + 8SO2
BartSMP [9]

Answer:

80.13g of SO2

Explanation:

4FeS2 + 11O2 —> 2Fe2O3 + 8SO2

Molar Mass of FeS2 = 55.8 + (2x32) = 119.8g/mol

Mass of FeS2 from the balanced equation = 4 x 119.8 = 479.2

Molar Mass of SO2 = 32 + (16x2) = 32 + 32 = 64g/mol

Mass of SO2 from the balanced equation = 8 x 64 = 512g

From the equation,

479.2g of FeS2 produced 512g of SO2.

Therefore, 75g of FeS2 will produce = (75 x 512)/479.2 = 80.13g of SO2

3 0
4 years ago
What are some main points about star formation
AysviL [449]

Explanation:

A Giant Gas Cloud. A star begins life as a large cloud of gas.

A Protostar Is a Baby Star.

The T-Tauri Phase.

Main Sequence Stars.

Expansion into Red Giant.

Fusion of Heavier Elements.

Supernovae and Planetary Nebulae.

6 0
3 years ago
The unbalanced equation below shows the combustion of methane.
Ratling [72]
B. 1, 2, 1, 2. You balance the equation by making sure there are equal elements on both sides.
3 0
3 years ago
What mass in grams of hydrogen is produced by the reaction of 2.0 g of magnesium? (Make sure to balance the reaction first)
denpristay [2]

Answer:

0.164541341 g H2

Explanation:

1) Convert grams to moles by dividing by RMM of Magnesium (24.31g).

  2g Mg * (1 mol Mg / 24.31 g Mg) = 0.082270671 mol of Mg

2) Use the balanced equation's ratio of 1 mol Mg: 1 mol H2.

  0.082270671 mol of Mg = 0.082270671 mol of H2

3) Convert the mol of H2 back into grams by multiplying by H2's RMM (2 g).

  0.082270671 mol of H2 * 2 g H2 = 0.164541341 g H2

* Answer can be rounded to your liking *

7 0
4 years ago
Why do cells have a limit to how big or small they can be?
Pepsi [2]
Cells are so little, so they can maximize their ratio of surface area to volume. Smaller cells have a higher ratio which allow more molecules and ions move across the cell membrane per unit of cytoplasmic volume. Cells are so small because they need to be able to get the nutrients in and the waste out quickly.
4 0
4 years ago
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