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2 years ago

Rainforests may be located in what latitude range?

Chemistry

1 answer:

SpyIntel [72]2 years ago

6 0

Answer:

near the equator where it's hot

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Nicolaus Copernicus was a Polish astronomer who is best known for the theory that the sun is near the center of the universe and

Simora [160]

It is B nevermind I thought it was c but it wasn't.

5 0

2 years ago

Abigail obtained 36.6 grams of calcium carbonate after performing a reaction. From her calculations, she knew she should have ob

Zielflug [23.3K]

Answer:

it would be 1

Explanation:

3 0

3 years ago

Write the isotopic symbol for the following (show your work) a) An isotope of iodine whose atoms have 78 neutrons b) An isotope

morpeh [17]

Answer:

For a: The isotopic representation of iodine is $_{53}^{131}\textrm{I}$

For b: The isotopic representation of cesium is $_{55}^{137}\textrm{Cs}$

For c: The isotopic representation of strontium is $_{38}^{52}\textrm{Sr}$

Explanation:

The isotopic representation of an atom is: $_Z^A\textrm{X}$

where,

Z = Atomic number of the atom

A = Mass number of the atom

X = Symbol of the atom

For a:

We are given:

Number of neutrons = 78

Atomic number of iodine = 53 = Number of protons

Mass number = 53 + 78 = 131

Thus, the isotopic representation of iodine is $_{53}^{131}\textrm{I}$

For b:

We are given:

Number of neutrons = 82

Atomic number of cesium = 55 = Number of protons

Mass number = 55 + 82 = 137

Thus, the isotopic representation of cesium is $_{55}^{137}\textrm{Cs}$

For c:

We are given:

Number of neutrons = 52

Atomic number of strontium = 38 = Number of protons

Mass number = 38 + 52 = 90

Thus, the isotopic representation of strontium is $_{38}^{52}\textrm{Sr}$

3 0

2 years ago

What is the capillary rise of ethanol in a glass tube with a 0.1 mm radius if the surface tension of ethanol is 0.032Jm2 and the

sweet [91]

Answer: The capillary rise(h) in the glass tube is = 0.009m

Explanation:

Using the equation

h = 2Tcosθ/rpg

Given

Contact angle, θ = Zero

h = height of the glass tube=?

T = surface tension = $0.032J/m^2$

r = radius of the tube = 0.1mm =0.0001m

p= density of ethanol = $0.71g/cm^3$

g= $9.8m/s^2$

h = $(2 * 0.032 * cos 0)/( 710*9.8*0.0001)$

h= 0.09m

Therefore the capillary rise in the tube is 0.09m

5 0

3 years ago

1) Which of the following is an example of an endothermic process?

Aleks04 [339]

For the first question, the correct answer among the choices listed is option A, a chocolate bar melting in hot car. It is an endothermic process because it absorbs heat energy for it to be melted. For the second question, it think the correct answer is the last option, (-2222) + (-1182) - (-1144).

3 0

3 years ago

Read 2 more answers