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2 years ago

Describe the relationship between a hypothesis, a theory, and a natural law.

1 answer:

8 0

Hypothesis, theory and natural laws are related in a number of ways, the connections are as follows:
1. A THEORY is a human attempt at describing a NATURAL LAW.
2. THEORIES usually begin as HYPOTHESIS.
3. NATURAL LAWS are discovered through experiments and HYPOTHESIS is a major part of every scientific experiments.

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What is a polar liquid?

BabaBlast [244]

Polar liquids have both negative and positive ends.

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2 years ago

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Which has greater kinetic energy: a bullet that has a mass of 0.05kg travelling at 2,500m/s, or a lorry that has a mass of 4,500

Vladimir [108]

Answer:

the answer will be lorry

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2 years ago

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How many milliliters of a 0.285 M HCl solution are needed to neutralize 249 mL of a 0.0443 M Ba(OH)2 solution?

meriva

Answer:

$\large \boxed{\text{77.4 mL}}$

Explanation:

Ba(OH)₂ + 2HCl ⟶ BaCl₂ + H₂O

V/mL: 249

c/mol·L⁻¹: 0.0443 0.285

1. Calculate the moles of Ba(OH)₂

$\text{Moles of Ba(OH)$_{2}$} = \text{0.249 L Ba(OH)}_{2} \times \dfrac{\text{0.0443 mol Ba(OH)}_{2}}{\text{1 L Ba(OH)$_{2}$}} = \text{0.011 03 mol Ba(OH)}_{2}$

2. Calculate the moles of HCl

The molar ratio is 2 mol HCl:1 mol Ba(OH)₂

$\text{Moles of HCl} = \text{0.011 03 mol Ba(OH)}_{2} \times \dfrac{\text{2 mol HCl}}{\text{1 mol Ba(OH)}_{2}} = \text{0.022 06 mol HCl}$

3. Calculate the volume of HCl

$V_{\text{HCl}} = \text{0.022 06 mol HCl} \times \dfrac{\text{1 L HCl}}{\text{0.285 mol HCl}} = \text{0.0774 L HCl} = \textbf{77.4 mL HCl}\\\\\text{You must add $\large \boxed{\textbf{77.4 mL}}$ of HCl.}$

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2 years ago

According to the collision theory of chemical reactions, an increase in the number of effective reactant collisions per unit tim

olasank [31]

1. true, more effective collisions per second. Faster reaction
2. How can the reaction be slowed down? (talking about how fast or slow the reaction is)
3. True
4. Rate lower if surface area decrease
5. Fine powder form
6. True
7. False
Image questions:
1. False
2. Energy of reactants higher than products.

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2 years ago

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C3H8 is ________ A. unsaturated B. saturated

ELEN [110]

I believe it is saturated!

I hope this helps. Please mark me the Brainliest, it’s not necessary but I put time and effort into every answer and I would appreciate it greatly. Have a great day, stay safe and stay healthy ! :)

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2 years ago