A system does 591 kJ of work and loses 256 kJ of heat to the surroundings.

which statement best describes a mole? it is 12 units of a given substance. it contains 6.02 1023 grams of sodium chloride. it i

Digiron [165]

Answer:

The correct option is;

It contains 6.02 × 10²³ particles of a given substance

Explanation:

A mole of substance is the standard scientific unit of measurement for the quantity of the substance which is made up of a large number of small particles such as molecules, ions, atoms, electrons or other entities.

The General Conference on Weights and Measures defines the mole as the amount of a substance that contains 6.02214076 × 10²³ units of entities

The number 6.02214076 × 10²³, is also known as Avogadro's number.

4 0

3 years ago

Read 2 more answers

A battery lighting a bulb is an example of ____energy converting to____energy.

tino4ka555 [31]

Depends have you been taught that batteries store chemical energy then it’s chemical to light

3 0

2 years ago

Which of the following sites has volcanoes related to subduction? A is on an island arc, B is in the Andes, C is near Hawaii, D

scoray [572]

Answer:

A is on an island arc,

B is in the Andes

Explanation:

The subduction region is referred to as the subduction zone. When a plate slips underneath another, it forms a trench. Earthquakes resulting from the plate panelling often result in magma spilling across the underwater volcano trench. Island arcs are vast chains of active volcanoes with strong seismicity located along the converging tectonic plate borders. Much of the islands arcs emerge from the oceanic crust and also have originated from fall of the lithosphere into the mantle across the subduction zone. In the Andes mountain range, Under the South American plate the Nazca plate is subducting.

6 0

2 years ago

For each of the following amounts, calculate the mass

nalin [4]

The masses of the following amount of compound are as follows:

a. 2080.12 grams of barium iodide

b.1139.2 grams of sulphur dioxide

c. 96.25 grams of AspirinTM

d. 27.144 grams of magnesium nitrite

The molarity formula is represented as follows;

molarity = mass / molar mass

Recall we are ask to find the masses of the compounds. Therefore,

mass = molarity × molar mass

a 5.32 mol barium iodide, BaI₂

molarity = 5.32 mol

molar mass of BaI₂ = 137 + 127(2) = 137 + 254 = 391 g/mol

mass = 5.32 × 391 = 2080.12 grams.

b. ) 17.8 mol sulphur dioxide, SO₂

molarity = 17.8 mol

molar mass of SO₂ = 32 + 32 = 64 g /mol

mass = 17.8 × 64 = 1139.2 grams.

c. 1.25 mol AspirinTM, CHO₄

molarity = 1.25 mol

molar mass of CHO₄ = 12 + 1 + 64 = 77 g / mol

mass = 1.25 × 77 = 96.25 grams

d. 0.234 mol magnesium nitrite, Mg(NO₂)₂

molarity = 0.234 mol

molar mass = 24 + 14(2) + 32(2) = 24 + 28 + 64 = 116 g/mol

mass = 116 × 0.234 = 27.144 grams.

learn more on masses here: brainly.com/question/10312739?referrer=searchResults

6 0

1 year ago

Otis watches a cooking show on making mayonnaise. The chef dissolves salt and sugar in vinegar. She mixes in an egg yolk, and th

RUDIKE [14]

We are using vinegar ( a polar compound) and oil (non polar compound) in the making of mayonnaise. The two will form emulsion when mixed together and will be separated as two distinct layers

Here chef uses egg to hold or homogenize the two immiscible substances together.

Thus egg is stabilizing the colloid formed between vinegar and oil.

3 0

2 years ago

Read 2 more answers