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vivado [14]
3 years ago
13

3. Why does å star begin shining?

Chemistry
2 answers:
steposvetlana [31]3 years ago
8 0

Answer:

a star shines due to thermonuclear fusion

Explanation:

Nimfa-mama [501]3 years ago
8 0

Answer:

If heated and intense enough nuclear fusion is in the center of the star will continue. It takes a star the size of our sun about 20 million years to reach this point. Once it starts nuclear fusion, the star can shine for about 10 billion years.

Explanation:

You might be interested in
Describe the relationship between the mole and molar mass. Be prepared to describe the process for converting between moles and
malfutka [58]

Answer:

The molar mass of any substance is the mass in grams of one mole of representative particles of that substance. ... In such a conversion, we use the molar mass of a substance as a conversion factor to convert mole units into mass units (or, conversely, mass units into mole units).

Explanation:

8 0
3 years ago
Read 2 more answers
Which of the following properties can be
Aleonysh [2.5K]

Answer:

Ability to conduct electricity

Melting point

4 0
3 years ago
El osmio es un metal sólido que tiene una densidad
pentagon [3]

Respuesta:

4.42 × 10⁻⁶ m³

Explicación:

Paso 1: Información provista

  • Densidad del osmio (ρ): 22600 kg/m³
  • Masa de osmio (m): 100 g

Paso 2: Convertir 100 g a kilogramos

Usaremos el factor de conversion 1 kg = 1000 g.

100 g × 1 kg/1000 g = 0.100 kg

Paso 3: Calcular el volumen ocupado por 0.100 kg de osmio

La densidad es una propiedad intensiva, igual al cociente entre la masa y el volumen.

ρ = m/V

V = m/ρ

V = 0.100 kg / (22600 kg/m³) = 4.42 × 10⁻⁶ m³

5 0
3 years ago
Which of the following is improper isotope notation? Explanation: Nineteen is potassium's atomic number
sasho [114]

Answer:

C. Potassium-19 .

Explanation:

Hello!

In this case, since isotopes are known be atoms of the same element with equal atomic number but different mass number, we can consider the case of carbon which has two natural occurring ones, carbon-12 and carbon-13 whereas carbon-12 has the greatest abundance. However, isotope notation may take two forms:

1. Symbol of the element followed by a dash indicating the mass number of the isotope, for instance: C-12, K-39, and so on.

2. Name of the element followed by a dash indicating the mass number of the isotope, for instance: Carbon-12, Potassium-39, and so on.

In such a way, the improper isotope notation is C. Potassium-19 , considering that A should be K-39 because atomic symbol of potassium is K, not k.

Best regards!

7 0
3 years ago
NEED HELP
hjlf

Answer:

Explanation:

V1/T1 =V2/T2    at constnant pressure

5 0
4 years ago
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