2 years ago

What makes science reliable

1 answer:

5 0

Answer:

Science is really reliable because there is research and math and brains. Actual science are results from experiments, so it's mainly always correct.

Explanation:

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CHEM

castortr0y [4]

Molarity = moles / liter

a) M = 2/4 = 0.5 M

b) Moles = 4/(30 + 16 + 1)
= 0.085
M = 0.085 / 2 = 0.0425 M

c) Moles = 5.85 / (23 + 35.5)
= 0.1
M = 0.1 / 0.4
= 0.25 M

3 0

2 years ago

Read 2 more answers

An unknown metal has a mass of 86.8 g. When 5040 J of heat are added to the sample, the sample temperature changes by 64.7 ∘ C .

grandymaker [24]

Answer: The specific heat of the unknown metal is $0.897J/g^0C$

Explanation:

The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.

$Q=m\times c\times \Delta T$

Q = Heat absorbed= $5040$ Joules

m= mass of substance = 86.8 g

c = specific heat capacity = ?

Initial temperature of the water = $T_i$

Final temperature of the water = $T_f$

Change in temperature , $\Delta T=T_f-T_i=(64.7)^0C$

Putting in the values, we get:

$5040=86.8\times c\times 64.7^0C$

$c=0.897J/g^0C$

The specific heat of the unknown metal is $0.897J/g^0C$

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2 years ago

Need help with chemistry problem

sukhopar [10]

Answer:

b option sir sidd dichhi good book goo

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1 year ago

Do the same volumes of H2O and H2SO4 have the same number of molecules?

Romashka [77]

No, they do not. Hope I helped! :)

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2 years ago

When electrons gain energy, what can they do?

beks73 [17]

B. When electrons gain energy, they have the power to move up to a higher energy level in an atom.

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