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4 years ago

(earth science not chem!!) What branch of Earth Science deals with stars and galaxies beyond Earth?

Chemistry

2 answers:

8_murik_8 [283]4 years ago

5 0

Answer:

The answer is Astronomy.

Explanation: Astronomy is the study of objects beyond the Earth’s atmosphere

kolezko [41]4 years ago

4 0

I would say astronomy

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The specific heat capacity of silver is 0.24 J/°C ·g.

kirza4 [7]

Answer:

A) 900 J

B) 27.96 J

C) 1,628 J ≅ 1.63 kJ

Explanation:

The heat absorbed by the metal (silver) - or energy required to heat it - is calculated as:

heat = mass x Cp x ΔT

Where Cp is the heat capacity (0.24 J/°C ·g) and ΔT is the change in temperature (final T - initial T).

A) Given:

mass = 150.0 g

final T = 298 K = 25°C

initial T = 273 K = 0°C

We calculate the energy in J to raise the temperature:

heat = mass x Cp x (final T - initial T)

= 150 .0 g x 0.24 J/°C ·g x (25°C - 0°C )

= 900 J

B) Given:

moles Ag= 1.0 mol

ΔT = 1.08°C

We first calculate the mass of silver (Ag) by multiplying the moles of Ag by the molar mass of Ag (MM = 107.9 g/mol)

mass = moles x MM = 1.0 mol Ag x 107.9 g/mol Ag = 107.9 g

Then, we calculate the heat required:

heat = mass x Cp x ΔT = 107.9 g x 0.24 J/°C ·g x 1.08°C = 27.96 J

C) Given:

heat = 1.25 kJ = 1,250 J

final T = 15.28°C

initial T = 12.08°C

We first calculate the change in temperature:

ΔT = final T - initial T = 15.28°C - 12.08°C = 3.2°C

Then, we calculate the mass of silver:

mass = heat/(Cp x ΔT) = 1,250 J/(0.24 J/°C ·g x 3.2°C) = 1,628 J ≅ 1.63 kJ

6 0

3 years ago

Which state of matter would be described as having highly energized, charged particles which move extremely fast?

Naily [24]

Gas

Kinetic energy is the energy an object has due to its motion. The faster particles move, the more kinetic energy they have. Solid objects have the least kinetic energy because their particles vibrate in place. Gases have the most kinetic energy because their particles move very quickly.

7 0

3 years ago

Guy plzz help me the this and thanks

ad-work [718]

Answer:

Explanation:

In first picture,

When rock was not in the cylinder,

Volume of water

$= {18cm}^{3}$

In second picture, 

When rock is in the cylinder,

Volume of water

$= {36cm}^{3}$

Hence,

Volume of rock

$= 36 {cm}^{3} - {18cm}^{3}$

$= 18 {cm}^{3} (ans)$

4 0

3 years ago

Compared to an atom of C-12, an atom of C-14 has

KonstantinChe [14]

Explanation:

Carbon-12 atoms have stable nuclei because of the 1:1 ratio of protons and neutrons.

Carbon-14 atoms have nuclei which are unstable. C-14 atoms will undergo alpha decay and produce atoms of N-14. Carbon-14 dating can be used to determine the age of artifacts which are not more than 50,000 years old.

8 0

3 years ago

when a species must survive changes in the environment, would they want to use sexual or asexual reproduction. Explain

eduard

Sexual. First of all because any thing that is something like an animal can not participate in asexual reproduction. A species is a small population of a certain animal that can survive and produce fertile offspring

5 0

3 years ago