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Makovka662 [10]

3 years ago

9

there are tiny plants growing on rock fence after the several year . you observe something happened on the rock which of the fol

lowing describes your observations ? the plants the rock

1 answer:

Bingel [31]3 years ago

5 0

it is moss

Explanation:

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What are the steps to convert meters to miles

rodikova [14]

m/1,609.344=mi (meters divided by 1,609.344 equals miles)

4 0

3 years ago

The element rhenium (Re) exists as two stable isotopes and 18 unstable isotopes. Rhenium-185 has in its nucleus

sweet [91]

Answer:

d. 75 protons, 110 neutrons

Explanation:

In an isotope, the number next to the number of the atom is the mass number (Protons + neutrons). Rhenium has as atomic number 75, that means Rhenium has <em>75 protons</em>. As atomic mass, 185, is the sum of protons and neutrons, number of neutrons is:

185 - 75 = <em>110 neutrons</em>

<em />

Thus, right answer is:

<em>d. 75 protons, 110 neutrons </em>

<em />

8 0

3 years ago

If you had to explain to a friend how to balance a chemical equation, what

Evgesh-ka [11]

Answer:

make sure that the number of atoms on the left side of the equation equals the number of atoms on the right.

Explanation:

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3 years ago

Dust in homes often clings to furnishings due to electrostatic interactions

Olenka [21]

This is true do to all the other particules around

3 0

3 years ago

Sodium metal is sometimes used as a cooling agent in heat exchange units because of its relatively high molar heat capacity of 2

IgorC [24]

Answer:

The specific heat of sodium is 1,23J/g°C

Explanation:

Using the atomic weight of sodium (23g/mol) and the atomic weight definition, we have that each mole of the substance has 23 grams of sodium.

starting from this, we use the atomic weight of sodium to convert the units from J / mol ° C to J / g ° C

$28,2 \frac{J}{mol C} x \frac{1mol}{23g} = 1,23 J/g C$

4 0

3 years ago