Can you light diamond on fire?

Thewood,papertowel,andaluminumfoilwereallatroomtemperaturewhenyou measured temperature for each object. Based on your results, e

Paraphin [41]

Answer:

The difference in the observed temperature of measurement of the material and their apparent temperature when touched by hand is due to their relative higher affinity for heat. As such aluminum with a lower heat capacity or higher affinity or transmission ability for heat than the hand will feel cool when touched.

The materials have different specific heat capacity or heat affinity which is a measure of their ability to quickly take on the temperature of their surroundings, in this case their ability to conduct heat energy relative to the hand

Explanation:

The aluminium with specific heat capacity of 0.900 J/gm K requires very little heat to cause a temperature change compared to a wood with a specific heat capacity of 1.76 J/gm K such that when one touches a piece of aluminium, the aluminium quickly raises its temperature by absorbing heat from the hand which is observed as it (the aluminium), being cold. The same can be said of the paper towel

The relationship is

Heat loss or gain = mass × specific heat capacity × temperature change

In other words, aluminium has a higher affinity for heat than either the hand or wood

5 0

3 years ago

If you combust 7.500g of methanol with an excess of oxygen, a) how many grams and molecules of water will be produced, and b) ho

DIA [1.3K]

Explanation:

The equation for this reaction is given by;

2CH3OH(l) + 3O2(g) → 2CO2(g) + 4H2O(g)

From the reaction;

2 mol of methanol produces 2 mol of CO2 and 4 mol of water

In terms of mass;

Mass = Molar mass * Number of mol

Methanol;

Mass = 32 g/mol * 2 mol = 64 g

CO2;

Mass = 44 g/mol * 2 mol = 88g

H2O;

Mass = 18 g/mol * 4 mol = 72 g

This means;

64g of methanol produces 88g of CO2 and 72g of water

a) how many grams and molecules of water will be produced

64g of Methanol = 72g of Water

7.5g would produce xg of Water

X = (7.5 * 72) / 64 = 8.4375 g of water

Number of moles = Mass / Molar mass = 8.4375 / 18 = 0.46875 mol

Molecules = moles * Avogadro number = 0.46875 * 6.022 * 10^23 = 2.82 * 10^23 molecules

b) how many grams and molecules of carbon dioxide will be produced

64g of Methanol = 88g of CO2

7.5g would produce xg of CO2

X = (7.5 * 88) / 64 = 10.3125 g of CO2

Number of moles = Mass / Molar mass = 10.3125 / 44 = 0.2344 mol

Molecules = moles * Avogadro number = 0.2344 * 6.022 * 10^23 = 1.411 * 10^23 molecules

3 0

3 years ago

Why does sodium carbonate affect pH?

Varvara68 [4.7K]

Carbonate compounds have a negative valency (because they contain oxygen), so NaCO3 has a negative valency (it’s a negatively-charged ion) which makes it basic or alkaline.

8 0

4 years ago

Calculate how many mg is lethal to resident Arnold who weighs 45 kg and resident Harold who weighs 96 kg. The LD50 of lead is 45

fredd [130]

20250mg for Arnold
43200 for Harold

7 0

3 years ago

Read 2 more answers

why can an increase in temperature lead to more effective collisions between reactant particles and an increase in the rate of a

Tasya [4]

The reason why is because particles are moving faster and possess greater kinetic energy due to the increase in temperature, this causes greater frequency or number of collisions to take place and also allows for a higher likelihood that upon reactant molecules colliding they will undergo the reaction process as they will have achieved the required energy needed for the reaction to start. Thus overall having a greater change in quantity conversion of reactants to products within a shorter period of time, thus increasing the reaction rate.

5 0

3 years ago