3 years ago

What causes continental drift?

2 answers:

6 0

Answer:

The hypothesis that states that the continents once formed a single landmass, broke up, and drifted to their present locations.

Margaret [11]3 years ago

4 0

Answer:

"Wegener suggested that perhaps the rotation of the Earth caused the continents to shift towards and apart from each other. ... "

Explanation:

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By using mechanical advantage you can get more work out of any machine than what you put into it. True False

KengaRu [80]

True machines do help alot...

5 0

3 years ago

What is the element?

irakobra [83]

Helium - 2 protons

lithium - 3

beryllium - 4

Carbon has 6 protons

5 0

3 years ago

Find the mass in 2.6 mol of lithium bromide. (Hint: You need to write the formula)

marissa [1.9K]

Lithium Bromide : LiBr.

Molar mass of lithium bromide : 86.845 g/mol.

To find the mass of 2.6 mol of lithium bromide, simply multiply in order to cancel out the moles : 2.6 mol * 86.845 g / 1 mol = 225.8 grams.

6 0

3 years ago

11.Suppose you have the most abundant isotope of gold (Au). How many neutrons would it have?

Rus_ich [418]

Neutrons = 118

<h3>Further explanation </h3>

The elements in nature have several types of isotopes

Isotopes are elements that have the same Atomic Number (Proton)

Atomic mass is <em>the average atomic mass of all its isotopes </em>

The most abundant isotope of gold (Au) is isotope Au-197

So the atomic mass of Au = 197

and the atomic number of Au = 79

Atomic mass is the sum of protons and neutrons

Atomic Number (Z) = Atomic mass (A) - Neutrons

Neutrons = A - Z

So neutrons for Au-197 :

$\tt neutrons=197-79=118$

6 0

3 years ago

Copper can be also be made by reacting copper oxide with methane

Vsevolod [243]

Answer:

Explanation:

3 0

2 years ago