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3 years ago

ASAP HELP ME PLEASE!!!!!! what is the difference in an element and a compounds?

Chemistry

2 answers:

Bas_tet [7]3 years ago

7 0

Answer:

ELEMENTS

COMPOUNDS

Elements are made up of one kind of atoms.

Compounds are made up of two or more kinds of atoms.

Elements cannot be broken down into simpler substances by any physical or chemical method.

Compounds can be broken down into simpler substances by chemical methods.

Elements have their own set of properties.

Properties of a compound differ from those of their elements.

Examples: Hydrogen, Oxygen

Examples: Water, Sodium chloride

sertanlavr [38]3 years ago

5 0

Answer:

an element is a pure substance that cannot be split into simpler substance by chemical means while a compound is a mixture made up of two or more elements chemically combined

Explanation:

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Stable nuclei with low atomic numbers, up to 20, have a neutron to proton ratio of approximately ________.

Pie

1 to 1. Most small atoms have the same number of protons and neutrons

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3 years ago

24g of methane were burned in an excess of air. What mass of water would be produced in the reaction assuming complete combustio

expeople1 [14]

Answer:

54g of water

Explanation:

Based on the reaction, 1 mole of methane produce 2 moles of water.

To solve this question we must find the molar mass of methane in order to find the moles of methane added. With the moles of methane and the chemical equation we can find the moles of water produced and its mass:

Molar mass CH₄:

1C = 12g/mol*1

4H = 1g/mol*4

12g/mol + 4g/mol = 16g/mol

Moles methane:

24g CH₄ * (1mol / 16g) = 1.5 moles methane

Moles water:

1.5moles CH₄ * (2mol H₂O / 1mol CH₄) = 3.0moles H₂O

Molar mass water:

2H = 1g/mol*2

1O = 16g/mol*1

2g/mol + 16g/mol = 18g/mol

Mass water:

3.0moles H₂O * (18g / mol) =

<h3>54g of water</h3>

8 0

3 years ago

What is the difference between weather and climate? Why is it so hot along the equator? Why are some areas of the ocean warmer t

ziro4ka [17]

Answer:

the weather is raining sunning or rainbow

because of the sun its so hot

because its cold snowing

because the oceans is water you can swimming

Explanation:

that is

3 0

2 years ago

Read 2 more answers

A solution is prepared by mixing 93.0 mL of 5.00 M HCl and 37.0 mL of 8.00 M HNO3. Water is then added until the final volume is

Charra [1.4K]

Answer:

$[H^{+}] = 0.761 \frac{mol}{L}$

$[OH^{-}]=1.33X10^{-14}\frac{mol}{L}$

$pH = 0.119$

Explanation:

HCl and HNO₃ both dissociate completely in water. A simple method is to determine the number of moles of proton from both these acids and dividing it by the total volume of solution.

$n_{H^{+} } from HCl = [HCl](\frac{mol}{L}). V_{HCl}(L) \\ n_{H^{+} } from HNO_{3} = [HNO_{3}](\frac{mol}{L}). V_{HNO_{3}}(L)$