All categories

2 years ago

1. Describe what an irreversible change is.

Chemistry

2 answers:

lozanna [386]2 years ago

8 0

Answer:

A change is called irreversible if it cannot be changed back again. In an irreversible change, new materials are always formed.

Explanation:

Bas_tet [7]2 years ago

6 0

1. An irreversible changes are permanent changes that cannot be undone.

2. Mixing and frying are irreversible changes

3. reversible changes are changes that can be brought back to its original form, and irreversible i something that you can’t change back

You might be interested in

A teacher brings in a cup of iced water and asks students to discuss if the system is exothermic or endothermic . Aida states th

Montano1993 [528]

Answer:

Explanation:

In thermodynamics, a exothermic system looses heat to the surroundings while an endothermic system absorbs heat from the surroundings.

A system is a part the universe marked off by a specified boundary. The contents of the cup constitutes the system in this case.

The region of space outside the system is called the surroundings. Hence everything outside the cup constitutes the surroundings.

7 0

2 years ago

Rocks are classified as igneous, sedimentary, or metamorphic based primarily on

irinina [24]

Answer:

Method of formation

Explanation:

7 0

2 years ago

Soils that allow water to pass through them faster are more _______.

siniylev [52]

I would say C. Permable

Google def.(of a material or membrane) allowing liquids or gases to pass through it.
"a frog's skin is permeable to water

Porous- (of a rock or other material) having minute spaces or holes through which liquid or air may pass

4 0

2 years ago

Read 2 more answers

Chiara knows that weight is affected by gravitational pull. She is putting together a poster to display in her classroom.

Tanya [424]

Answer: A

Explanation: 150 lb * 1/6 = 25 lb

8 0

2 years ago

Read 2 more answers

How many grams are in 1.946 moles of nacl

Ilia_Sergeevich [38]

Answer:

113.8g

Explanation:

Statement of problem: mass of 1.946mole of NaCl

Given parameters:

Number of moles of NaCl = 1.946mole

Unknown: mass of NaCl

Solution

To find the mass of NaCl, we apply the concept of moles which expresses the relationship between number of moles and mass according to the equation below:

Number of moles = $\frac{mass}{molar mass}$

To find the molar mass of NaCl:

the atomic mass of Na = 23g

atomic mass of Cl = 35.5g

Molar mass of NaCl = (23 + 35.5) = 58.5gmol⁻¹

Mass of NaCl = Number of moles x molar mass of NaCl

Mass of NaCl = 1.946 x 58.5 = 113.8g

7 0

2 years ago