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3 years ago

When you find something that interests you, how do you make a hypothesis

2 answers:

4 0

A hypothesis is an educated guess, so what I think would be a good way to make a hypothesis is to research the topic a little bit, and make an assumption based on what you learned.

Like, say I'm interested in gases in balloons. I researched, and now I know that helium-filled balloons rise to the ceiling and balloons filled with regular air don't. I'm going to say, based on that, that helium is less dense than air which causes it to rise to the ceiling. I may or may not be right, but it doesn't matter right now. All that matters is that I can come up with an experiment to test my hypothesis! So my experiment would be testing if helium is actually less dense than air.

Misha Larkins [42]3 years ago

4 0

What Makes a Good Hypothesis? For a Good Hypothesis, You Should Answer "Yes" to Every Question
Is the hypothesis based on information from reference materials about the topic? Yes / No
Can at least one clear prediction be made from the hypothesis? Yes / No
Are predictions resulting from the hypothesis testable in an experiment? Yes / No
Does the prediction have both an independent variable (something you change) and a dependent variable (something you observe or measure)?

You might be interested in

Kit wants to see what happens to chocolate chips if they are placed in a bowl and heated in the microwave. Which is likely the m

kvasek [131]

B. When melted, the chocolate will take the shape of the bowl.

Explanation:

The chocolate chips are heated in the bowl, they will assume the shape of the bowl or container they are placed in.

They simply undergo a phase change from solids to liquids.
Solids generally have fixed volume with their rigid shapes.
Liquids and gases takes up the shape of the container they are placed in.
Baring no loss of chocolate, the weight will remain the same because weight is function of mass and gravity. Gravity will remain the same, and the amount of matter, the mass will also be the same.

Learn more:

Phase change brainly.com/question/1875234

#learnwithBrainly

4 0

3 years ago

Find the percentage composition of a compound that contains 17.6 g of iron and

olganol [36]

Answer:

Explanation:

Your goal here is to figure out the mass of iron and the mass of sulfur present in exactly

100 g

of this compound, which is what you need in order to know the compound's percent composition.

The problem provides you with the mass of iron and with the mass of sulfur present in

27.9 g

of this compound, so you must use this information to scale up your sample from

27.9 g

100 g

To do that, set up the known composition of the compound as a conversion factor.

To find the number of grams of iron present in

100 g

of compound, set up the conversion factor like this

17.6 g iron

27.9 g compound

You will end up with

100

g compound

⋅

17.6 giron

27.9

g compound

63.1 g iron

To find the mass of sulfur present in

100 g

of compound, you can either use a conversion factor set up in a similar manner

100

g compound

⋅

10.3 g sulfur

27.9

g compound

36.9 g sulfur

or use the fact that the compound contains only iron and sulfur to say that the mass of sulfur will be equal to

100 g compound

−

63.1 g iron = 36.9 g sulfur

You now know the mass of iron and the mass of sulfur present for every

100 g

of compound, so you can say that the compound has the following percent composition

63.1% iron

36.9% sulfur

Here

means per

100 g

of compound.

5 0

3 years ago

lord [1]

Answer:

$\boxed{6.08 \times 10^{23}}$

Explanation:

Data:

I = 2.15 A

t = 8 min 24 s

T = 26.0 °C

V = 65.4 mL

p = 774.2 To

1. Write the equation for the half-reaction

2H₂O ⟶ O₂ + 4H⁺ + 4e⁻

2. Calculate the moles of oxygen

$p = \text{774.2 To} \times \dfrac{\text{1 atm}}{\text{760 To}} = \text{1.0187 atm}$

V = 0.0654 L

T = (26.0 + 273.15) K = 299.15 K

$\begin{array}{rcl}pV& = & nRT\\1.0189 \times 0.0654 & = & n \times 0.08206 \times 299.15\\0.06662 & = & 24.55n\\\\n & = & \dfrac{0.06662}{24.55}\\\\n & = & 2.714 \times 10^{-3}\\\end{array}$

3. Calculate the moles of electrons

$\text{n} = \text{2.714 $\times 10^{-3}$ mol oxygen} \times \dfrac{\text{4 mol electrons}}{\text{ 1 mol ozygen}} = \text{ 0.01086 mol electrons}$

4. Calculate the number of coulombs

t = 8 min 24 s =504 s

Q = It = 504 s × 2.10 C·s⁻¹= 1058 C

5. Calculate the number of electrons

$\text{No. of electrons} = \text{1058 C} \times \dfrac{\text{1 electron}}{1.602 \times 10^{-19}\text{ C}} = 6.607 \times 10^{21}\text{ electrons}$

6. Calculate Avogadro's number

$N_{\text{A}} = \dfrac{6.607 \times 10^{21}}{0.01086} = \mathbf{6.08 \times 10^{23}}\\\\\text{The experimental value of Avogadro's number is } \boxed{\mathbf{6.08 \times 10^{23}}}$

3 0

4 years ago

What is the element with 2 protons on the

Paul [167]

Answer:

Helium

Explanation:

7 0

3 years ago

CH4(g) + 2O2(g) → CO2(g) + 2H2O(l): ΔH = −890 kJ

V125BC [204]

Answer:

The reaction of one mole of oxygen (O2) releases 445 kJ of energy.

Explanation:

Firstly, the reaction is exothermic since the sign of enthalpy change ΔH is negative.

The balanced equation: CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(l): ΔH = −890 kJ,

Shows that 1 mole of CH₄ react with 2 moles of oxygen and releases 890 kJ.

So, every choice says that absorb is wrong (choice 1& 3).

Choice no. 4 is wrong since it says that 2 moles of methane releases 890 kJ, because only one mole release this amount of energy.

So, the right choice is The reaction of one mole of oxygen (O2) releases 445 kJ of energy.

5 0

3 years ago