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Marat540 [252]
3 years ago
13

Scientists follow specific processes in order to determine valid explanations and conclusions from scientific data. Students gra

duating from Rydell High School in 2010 were asked to fill out an exit survey the last week of school. When students were asked to compare language arts courses with science courses, 20% of males reported preferring language arts and 80% reported preferring science. For females, 90% reported preferring language arts and 10% reported preferring science. Which of the following would be a valid conclusion based on the data from this study? a. Females are better at language arts than males, and males are better at science than females b. Females at Rydell High School are better at language arts than males at RHS, and males at RHS are better at science than females at RHS c. Females at Rydell High School prefer language arts courses to science courses, and males at Rydell High School prefer science courses to language arts courses d. For a specific graduating class at Rydell High School, the majority of male students preferred science courses over language arts, and the majority of female students preferred language arts courses over science
Chemistry
2 answers:
Rashid [163]3 years ago
8 0
D is the answer. You cannot say that anyone is good at anything because it doesn't say that. And they were surveying the class of 2010
GarryVolchara [31]3 years ago
6 0

Answer is: d. For a specific graduating class at Rydell High School, the majority of male students preferred science courses over language arts, and the majority of female students preferred language arts courses over science.

a. is not correct because this survey is about preference of students, not there grades.

b. is same as a.

c. is not correct because this survey is only about one genration of students (specific genration) and not about whole school.

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A bottle of wine contains 9.81 grams of C2H5OH, dissolved in 87.5 grams of water. The final volume of the solution is 100.0 mL.
dimulka [17.4K]

Answer:

[EtOH] = 2.2M and Wt% EtOH = 10.1% (w/w)

Explanation:

1. Molarity = moles solute / Volume solution in Liters

=> moles solute = mass solute / formula weight of solute = 9.8g/46g·mol⁻¹ = 0.213mol EtOH

=> volume of solution (assuming density of final solution is 1.0g/ml) ...

volume solution =  9.81gEtOH + 87.5gH₂O = 97.31g solution x 1g/ml = 97.31ml = 0.09731 Liter solution

Concentration (Molarity) = moles/Liters = 0.213mol/0.09731L = 2.2M in EtOH

2. Weight Percent EtOH in solution (assuming density of final solution is 1.0g/ml)

From part 1 => [EtOH] = 2.2M in EtOH = 2.2moles EtOH/1.0L soln

= {(2.2mol)(46g/mol)]/1000g soln] x 100% = 10.1% (w/w) in EtOH.

3 0
3 years ago
Which statement is true about the compound ammonium sulfate [(NH4)2SO4] ?
BabaBlast [244]

Answer:

It is a salt of two polyatomic ammonium ions and one polyatomic sulfate ion

Explanation:

Ammonium Sulfate is an ionic compound formed by two polyatomic ions, Ammonium NH+4 and Sulfate SO−4 . ... Therefore, it will take two +1 ammonium ions to balance the one -2 sulfate ion. This will make the formula for Ammonium Sulfate (NH4)2SO4

4 0
3 years ago
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The speed of a wave on a guitar string is 100 m/s, and the frequency is 1,000 Hz. what is the wavelength of the wave?
Ivenika [448]
v=fw (Assume for this example w is wavelength). w=v/f. w=100/1000= 0.1 m. The wavelength is 0.1 meters
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3 years ago
A 250 mL sample of gas is collected over water at 35°C and at a total pressure of 735 mm Hg. If the vapor pressure of water at 3
ELEN [110]

Answer:

The volume of the gas sample at standard pressure is <u>819.5ml</u>

Explanation:

Solution Given:

let volume be V and temperature be T and pressure be P.

V_1=250ml

V_2=?

P_{total}=735 mmhg

1 torr= 1 mmhg

42.2 torr=42.2 mmhg

so,

P_{water}=42.2mmhg

T_1=35°C=35+273=308 K

Now

firstly we need to find the pressure due to gas along by subtracting the vapor pressure of water.

P_{gas}=P_{total}-P_{water}

=735-42.2=692.8 mmhg

Now

By using combined gas law equation:

\frac{P_1*V_1}{T_1} =\frac{P_2*V_2}{T_2}

V_2=\frac{P_1*}{P_2}*\frac{T_2}{T_1} *V_1

V_2=\frac{P_gas}{P_2}*\frac{T_2}{T_1} *V_1

Here P_2 \:and\: T_2 are standard pressure and temperature respectively.

we have

P_2=750mmhg \:and\: T_2=273K

Substituting value, we get

V_2=\frac{692.8}{750}*\frac{273}{308} *250

V_2= 819.51 ml

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1 year ago
Humans have the ability to change the characteristics, or traits, of organisms over time. What is this process called?
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Answer:

gene therapy.

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