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Gennadij [26K]
3 years ago
8

The principal ingredient of glass is ______________________.

Chemistry
1 answer:
Lilit [14]3 years ago
4 0
The principal ingredient of glass is quartz sand (SiO₂).
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Calculate the heat absorbed by the water in a calorimeter when 175 grams of lead cools from 125.0°C to 22.0°C. The specific heat
Iteru [2.4K]

Answer:

Q = 233.42 J

Explanation:

Given data:

Mass of lead = 175 g

Initial temperature = 125.0°C

Final temperature = 22.0°C

Specific heat capacity of lead = 0.01295 J/g.°C

Heat absorbed by water = ?

Solution:

Heat  absorbed by water is actually the heat lost by the metal.

Thus, we will calculate the heat lost by metal.

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = T2 - T1

ΔT = 22.0°C - 125.0°C

ΔT = -103°C

Q = 175 g × 0.01295 J/g.°C×-103°C

Q = -233.42 J

Heat absorbed by the water is 233.42 J.

5 0
3 years ago
¿Que es el codigo genetico?
Burka [1]

Answer:

Los tripletes de nucleótidos de las moléculas de ADN y ARN que transportan información genética en las células vivas.

Explanation:

5 0
3 years ago
How much NaNO3 can I dissolve in 400 grams of water at 283 K?
jeyben [28]
929282827280182292848474748393027373882
8 0
2 years ago
Which of the following correctly describes the difference (on average) between an electron in a 2s orbital and an electron in a
bulgar [2K]

Answer:

C: electrons is the 3s orbital are higher than those in the 2s orbital

Explanation:

Looking at the options, the correct one is that the electrons in the 3s orbital will possess more energy than those in the 2s orbital. This is because the the 2s orbitals will be filled with electrons first before the 3s orbital.

Also from basics we know that the energy of an orbital increases as the quantum number increases.

4 0
2 years ago
Can someone help me with this science assignment
nikklg [1K]

1. NA = Sodium, NA was the chemicals symbols for the element would be NA because in Latin it is natrium for natron in which is sodium in English, Sodium was created by Humphry Davy in the year of 1807. Element name Sodium, Chemical symbol NA atomic number, 11 Atomic mass 23.

2. AG = Sliver, AG was the chemicals symbols for the element would be AG because in Latin it is argentum in which in English means bright and also sliver.  Element name Sliver Chemical symbol AG atomic number, 47 Atomic mass 108.        

3 0
2 years ago
Read 2 more answers
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