All categories

3 years ago

What tool do you use for water displacement

2 answers:

6 0

In science, you will use a graduated cylinder to measure a liquid's volume. Graduated cylinders are used to measure liquid volume because it is the instrument with the greatest accuracy. Liquids do not sit level in a container. Because of this, the surface of a liquid in any container is curved.

slava [35]3 years ago

4 0

A garduated cylander, in order to find the amount of water displaced you see how much the water has risen

You might be interested in

112 g of aluminum carbide react with 174 g water to produce methane and aluminum hydroxide in the reaction shown below.

dolphi86 [110]

<u>Answer:</u> 4.999 moles of excess reactant will be left over.

<u>Explanation:</u>

Limiting reagent is defined as the reagent which is completely consumed in the reaction and limits the formation of the product.

Excess reagent is defined as the reagent which is left behind after the completion of the reaction.

The number of moles is defined as the ratio of the mass of a substance to its molar mass.

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ .....(1)

Given mass of aluminium carbide = 112 g

Molar mass of aluminium carbide = 143.96 g/mol

Putting values in equation 1:

$\text{Moles of aluminium carbide}=\frac{112g}{143.96g/mol}=0.778mol$

For the given chemical reaction:

$2Al_4C_3(s)+12H_2O(l)\rightarrow 3CH_4(g)+4Al(OH)_3(s)$

By the stoichiometry of the reaction:

2 moles of aluminium carbide reacts with 12 moles of water

So, 0.778 moles of aluminium carbide will react with = $\frac{12}{2}\times 0.778=4.668 mol$ of water

Given mass of water = 174 g

Molar mass of water = 18 g/mol

Putting values in equation 1:

$\text{Moles of water}=\frac{174g}{18g/mol}=9.667mol$

Moles of excess reactant (water) left = 9.667 - 4.668 = 4.999 moles

Hence, 4.999 moles of excess reactant will be left over.

8 0

2 years ago

Zinc has an average atomic mass of 65.37 amu. Jack is trying to figure out what the most abundant isotope of zinc is, but he doe

Mekhanik [1.2K]

Zinc's most abundant isotope : Zinc-65

<h3>Further explanation </h3>

Isotopes are atoms whose no-atom has the same number of protons while still having a different number of neutrons.

So Isotopes are elements that have the same Atomic Number (Proton)

Atomic mass is the average atomic mass of all its isotopes

In determining the mass of an atom, as a standard is the mass of 1 carbon-12 atom whose mass is 12 amu

Mass atom X = mass isotope 1 . % + mass isotope 2.%

To decide zinc's most abundant isotope, then choose the closest mass number

or we can check the difference with the average mass number, if the value is the smallest, then that isotope has the largest abundant

Zinc-64

$\tt \dfrac{65.37-64}{65.37}=0.021$

Zinc-65

$\tt \dfrac{65.37-65}{65.37}=0.005$

Zinc-68

$\tt \dfrac{68-65.37}{65.37}=0.04$

Zinc-66

$\tt \dfrac{66-65.37}{65.37}=0.009$

The closest = Zinc-65(the smallest)

5 0

3 years ago

What is the biome of danmarkshavn of Greenland?

earnstyle [38]

A picture. hope this helps at least a little.

3 0

2 years ago

Why does temperature increase between changes of physical state?

Alekssandra [29.7K]

As temperatures increase, additional heat energy is applied to the constituent parts of a solid, which causes additional molecular motion. Molecules begin to push against one another and overall volume of a substance increases. When thermal energy is added to a substance, it’s temperature increases.

7 0

3 years ago

The quantum mechanical model states that

MariettaO [177]

The quantum mechanical model of the atom users complex shapes or orbitals { Sometimes called Electron Clouds }, volumes of space in which there is likely to be an electron. So, this model is based on probability rather then certainty. Hope that helps

7 0

3 years ago

Read 2 more answers