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nata0808 [166]
2 years ago
8

HELP ITS SCIENCE PLS

Chemistry
2 answers:
gulaghasi [49]2 years ago
8 0
15. 7


16. 30 (but not sure)


17.Conditions such as high light intensity result in an increased stomata index



19. They grow toward the sunlight to be able to generate energy by photosynthesis

20. If you plant a seed on its side, the shoot and root will emerge horizontally, but quickly change their direction in growth.

21. When the soil of a plant runs too low of available water, the water chains in the xylem become thinner and thinner due to less water...Occasionally, vascular fungal diseases will clog the xylem tissue and cause wilting.
anygoal [31]2 years ago
6 0
Don’t know lol um maybe
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After substantial heating, 6.25 g of iron produced 18.00 g of a compound with chlorine. The empirical formula is:
babunello [35]

Answer:

Option A. FeCl3

Explanation:

The following data were obtained from the question:

Mass of iron (Fe) = 6.25g

Mass of the compound formed = 18g

From the question, we were told that the compound formed contains chlorine. Therefore the mass of chlorine is obtained as follow

Mass of chlorine (Cl) = Mass of compound formed – Mass of iron.

Mass of chlorine (Cl) = 18 – 6.25

Mass of chlorine (Cl) = 11.75g

The compound therefore contains:

Iron (Fe) = 6.25g

Chlorine (Cl) = 11.75g

The empirical formula for the compound can be obtained by doing the following:

Step 1:

Divide by their molar mass

Fe = 6.25/56 = 0.112

Cl = 11.75/35.5 = 0.331

Step 2:

Divide by the smallest

Fe = 0.112/0.112 = 1

Cl = 0.331/0.112 = 3

The empirical formula for the compound is FeCl3

3 0
3 years ago
A 4.0 L container holds a sample of hydrogen gas at 306 K and 150 kPa. If the pressure increases to 300 kPa and the volume remai
riadik2000 [5.3K]

Answer:

612 K

Explanation:

From the question given above, the following data were obtained:

Initial temperature (T₁) = 306 K

Initial pressure (P₁) = 150 kPa

Final pressure (P₂) = 300 kPa

Volume = 4 L = constant

Final temperature (T₂) =?

Since the volume is constant, the final (i.e the new) temperature of the gas can be obtained as follow:

P₁ / T₁ = P₂ / T₂

150 / 306 = 300 / T₂

Cross multiply

150 × T₂ = 306 × 300

150 × T₂ = 91800

Divide both side by 150

T₂ = 91800 / 150

T₂ = 612 K

Thus, the new temperature of the gas is 612 K

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3 years ago
Los fenomenos fisicos son cambios permamentes en la materia?
alexgriva [62]

Answer:

Explanation:

Try English please

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Boiling occurs when molecules being changed from liquid to gas plz tell me the answer true or false
Valentin [98]

Answer:

Liquid to Gas

Explanation:

The particles need energy to rise and over come the attractions between them as the liquid gets warmer more particles have sufficient, energy to escape from liquid. eventually even particles in the middle of the liquid form bubbles of gas in the liquid At this point the liquid is boiliing and turning into gas.

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3 years ago
How do scientists take instruments for measurement up to about 100,000 feet of
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can’t be weather balloons cuz they would pop.
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