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Alexxandr [17]
3 years ago
12

A type of wood known as white pine has a density equal to 0.50 g/cm. What is the mass of a block of white pine that has the dime

nsions 5.0 cm by 10.0 cm by 200.0 cm ?
Chemistry
1 answer:
soldi70 [24.7K]3 years ago
5 0
Density equation: mass÷volume
so you multiply your dimensions to find the volume, density is given, so you have to solve equation for mass  so volume×density≈ mass
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Suppose that a certain biologically important reaction is quite slow at physiological temperature (37 oC) in the absence of a ca
Oksi-84 [34.3K]

Answer:

30 kJ

Explanation:

Arrhenius equation is given by:

k=Aexp(-Ea/RT)\\

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taking natural log of both side

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Therefore,

ln\frac{k_2}{k_1} =\frac{Ea_1-Ea_2}{RT}

Ea_1-Ea_2 is the  lowering in activation energy by enzyme,

R = 8.314 J/mol.K

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4 0
3 years ago
At 0 degrees Celsius, a gas occupies 22.4L. How hot must the gas be in celcius to reach a volume of 25.0L
NikAS [45]

Answer:

31.7 °C

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A straight line on a distance va time graph represents constant speed
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3 years ago
Read 2 more answers
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