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2 years ago

Why is it important for science to keep testing a hypothesis even after they’ve found it to be true?

Chemistry

1 answer:

satela [25.4K]2 years ago

6 0

Answer:

Explanation:

Repeated tests help determine whether the hypothesis is always true in different circumstances. Repeatedly testing a hypothesis qualifies it to be accepted as a theory.

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Protons, Neutrons, and Electrons Practice Worksheet

ANTONII [103]

Answer:

Sorry I am not good at chemistry

Explanation:

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3 years ago

How many molecules of Iron(II)oxide are present in 35.2*10^-23 g of Iron (II)oxide?

slava [35]

Answer:

R.F.M of Iron (II) oxide :

${ \tt{ = (56 \times 2) + (16 \times 3)}} \\ = 160 \: g$

Moles :

${ \tt{ \frac{35.2 \times {10}^{ - 23} }{160} }} \\ = 2.2 \times {10}^{ - 24} \: moles$

Molecules :

${ \tt{ = 2.2 \times {10}^{ - 24} \times 6.02 \times {10}^{23} }} \\ = 1.3244 \: molecules$

4 0

3 years ago

What energy convertion happens when green plants use energy from the sun to make sugar?

mixer [17]

The energy conversion happening here is known as photosynthesis. Photosynthesis is a process where the leaves of a plant absorb water and carbon dioxide, then, using light energy from the sun, convert that into oxygen and sugar.

8 0

3 years ago

Read 2 more answers

Consider the balanced equation below.

Bumek [7]

Answer : The correct option is, (2) 8 mole of hydrogen will react with 1 mole of sulfur.

Explanation :

The balanced chemical equation is,

$8H_2+S_8\rightarrow 8H_2S$

By the stoichiometry we conclude that, 8 moles of hydrogen react with 1 mole of sulfur to give 8 moles of hydrogen sulfide.

Hence, the correct options is, (2) 8 mole of hydrogen will react with 1 mole of sulfur.

6 0

3 years ago

Read 2 more answers

If 17.4 mL of 0.800 M HCl solution are needed to neutralize 5.00 mL of a household ammonia solution, what is the molar concentra

Verizon [17]

NH3 +HCl ----> NH4Cl

moles of HCl used = (0.8 x 17.4) /1000= 0.0139 moles
by use of reacting ratio between HCl to NH4Cl which is 1:1 therefore the moles of NH4Cl is also = 0.0139 moles
molar concentration = moles /volume in liters

molar concentration is therefore= (0.0139/5) x1000 = 2.7 M

8 0

3 years ago

Read 2 more answers