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3 years ago

What defines an element?

Chemistry

2 answers:

Troyanec [42]3 years ago

7 0

element is made up of only one type of atoms.

it is pure form of matter

example hydrogen, oxygen, carbon etc

Karolina [17]3 years ago

4 0

Answer:

An element is a substance that is made up of only one kind of atom and cannot be broken down into simpler forms by any ordinary chemical means

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2FeO(s) ⇌ 2Fe(s) + O2(g) K eq = 1 x 10^-6 at 1000 K

SCORPION-xisa [38]

Answer:

Explanation:

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3 years ago

Two gas-filled tanks have the same volume, temperature, and pressure. They are identical in every way except that one is filled

Tems11 [23]

Answer:

The tank with O₂ weighs more.

Explanation:

We can find the mass of gas using the ideal gas equation.

$P.V=n.R.T=\frac{m}{M} .R.T\\m=\frac{P.V.M}{R.T}$

Considering the pressure (P), volume (V), temperature (T) and ideal gas constant (R) are the same, we can establish that:

m ∝ M

The mass is directly proportional to the molar mass. The molar mass of O₂ (32 g/mol) is higher than the molar mass of N₂ (28 g/mol). Therefore, the tank with O₂ weighs more.

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3 years ago

Which cells produce photosynthesis

AnnZ [28]

Hey there,

Answer:

Photosynthetic cell

Hope this helps :D

<em>~Top♥</em>

6 0

3 years ago

A simple circuit consists of a battery to provide power, wires to carry the ______, and load that uses the _________-for example

kipiarov [429]

A simple circuit consists of a battery to provide power, wires to carry the electrical power, and
load that uses the electrical power for example a light globe

good luck

6 0

3 years ago

For a school event 1/6 of the athletic field is reversed for the fifth -grade classes the reserved part of the field is divided

SVETLANKA909090 [29]

Answer:

$\frac{1}{24}$

Explanation:

Given:

For a school event, 1/6 of the athletic field is reserved for the fifth -grade classes and the reserved part of the field is divided equally among the 4 fifth grade classes in the school.

To find: fraction of the whole athletic field reserved for each fifth class

Solution:

Fraction of the whole athletic field reserved for four fifth classes = $\frac{1}{6}$

So, fraction of the whole athletic field reserved for each fifth class = $\frac{1}{4}(\frac{1}{6})=\frac{1}{24}$

3 0

3 years ago