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3 years ago

How does a thermometer indicate the temperature of an object?

Chemistry

1 answer:

earnstyle [38]3 years ago

7 0

Temperature is a measure of the amount of heat, or thermal energy, generated by the particles that make up an object.

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Water is important in chemical weathering because _______

saw5 [17]

Answer:

Water plays a very important role in chemical weathering in three different ways. First, it combines with carbon dioxide in the soil to form a weak acid called carbonic acid. ... Finally, the water can break up minerals through hydrolysis. The most common group of minerals, the silicates, is decomposed by this process.

7 0

2 years ago

What mass of aluminum at 144 Celsius will increase the temperature of 100 g of water by from 10 C to 15 C?

Andrej [43]

Answer:

$m_{Al} = 18.019\,g$

Explanation:

There is a heating process between an aluminium piece and water, which is described by the First Law of Thermodynamics:

$Q_{Al} = - Q_{w}$

$m_{Al}\cdot c_{Al}\cdot (T_{o,Al}-T) = m_{w}\cdot c_{w}\cdot (T-T_{o,w})$

The mass of the aluminium piece is therefore cleared and known variables are substituted:

$m_{Al} = \frac{m_{w}\cdot c_{w}\cdot (T-T_{o,w})}{c_{Al}\cdot (T_{o,Al}-T)}$

$m_{Al} = \frac{(100\,g)\cdot \left(4.184\,\frac{J}{g\cdot^{\circ}C} \right)\cdot (15^{\circ}C-10^{\circ}C)}{\left(0.900\,\frac{J}{g\cdot ^{\circ}C} \right)\cdot (144^{\circ}C-15^{\circ}C)}$

$m_{Al} = 18.019\,g$

5 0

3 years ago

Choose the pure substance from the list below. osea water sugar air lemonade milk Question 2 (1 point) Saved A chemical change O

Harrizon [31]

Answer:

Pure substance: sugar

A chemical change: occurs when methane is burned.

Explanation:

Pure substances have definite constant compositions (reflected in formulas) and have their own chemical properties. On the other hand, mixtures are made of two or more pure substances (variable composition) and their chemical properties depend on each combination. From the list, only sugar is a pure substance (C₁₂H₂₂O₁₁), whereas seawater, air, lemonade, and milk are mixtures.

Chemical changes (chemical reactions) occur when pure substances transform into others, and therefore there are new formulas. Conversely, in physical changes, pure substances preserve their identity (formula) but have changes in their physical properties. Methane being burned is a chemical change since new substances are formed:

CH₄ + O₂ ⇄ CO₂ + H₂O

Water vaporization, paper shredding and dissolution of solids in liquids are examples of physical changes.

3 0

3 years ago

What is the shape of sf6

zmey [24]

Answer:

answer........of the question

3 0

3 years ago

An atom of zinc that contains 30 protons and 38 neutrons would be named what

julia-pushkina [17]

Answer:

Explanation:

30+38

so this is the isosotope of Zn that weighs 68

-so Zn68

6 0

3 years ago