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3 years ago

What state of matter is dubnium

Chemistry

2 answers:

AURORKA [14]3 years ago

8 0

I would say its solid, hope it helps.

kirill [66]3 years ago

7 0

At room temperature, it is a solid state of matter. hope this helps, have an amazing day :)

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There are two steps in the usual industrial preparation of acrylic acid, the immediate precursor of several useful plastics. In

tatyana61 [14]

Answer:

-470.4 kJ/mol

Explanation:

Balanced reactions equations are as follows.

CaC2 (s) + 2H2O (l) â C2H2 (g) + CaOH2 (s) ÎH=â414.kJ

6C2H2 (g) + 3CO2 (g) + 4H2O (g) â 5CH2CHCO2H (g) ÎH=132.kJ

To get the 6 C2H2 we need to multiply first equation by 6

Then we get

6CaC2 (s) + 12H2O (l) â 6C2H2 (g) + 6CaOH2 (s) ÎH=â414.kJ * 6 = -2484 kJ

6C2H2 (g) + 3CO2 (g) + 4H2O (g) â 5CH2CHCO2H (g) ÎH=132.kJ

So the total energy produced = -2484 kJ + 132.0 kJ = -2352 kJ

This amount of energy is given out for the 5 moles of acid

So lets convert it for 1 mol

-2352 kJ * 1 mol / 5 mol = -470.4 kJ/mol

So the delta H of reaction for the formation of the acrylic acid is -470.4 kJ/mol

5 0

3 years ago

How did thinking about collision theory help you think about the effect of social distancing?

melomori [17]

Answer:

When two people "collide" and one of them is carrying the virus then the other person starts carrying it. This is why we need to social distance so it doesn't spread.

Explanation:

3 0

3 years ago

Fruit salad is an example of what?

gulaghasi [49]

I think the answer will be homogeneous mixture

3 0

3 years ago

Oxygen, o, (number 8), sulfur, s, (number 16), and selenium, se, (number 34) have such similar chemical properties because?

irga5000 [103]

Oxygen (O), Sulphur (S) and Selenium (Se) have similar chemical properties because they all have the same number of electrons in their outermost shells.

Atoms with the same number of electrons in their outermost shells can be found in the same group.

A group consists of elements arranged in the same column (from top to bottom) on the periodic table. Elements on the same group have similar chemical properties.

Oxygen (O), Sulphur (S) and Selenium (Se) are in group eight. All three elements are highly electronegative and have 6 electrons in their outermost shell. They also carry ab charge of -2.

To learn more about the periodic table, visit:

brainly.com/question/14310368

#SPJ4

5 0

2 years ago

If salt (5. 99 × 10–6 mol) is dissolved in 1. 50 × 10–2 L of water, which expression can be used to find the molarity of the res

Alexus [3.1K]

Molarity can be defined as the moles of solute in a liter of solution. The molarity of the salt solution is $\rm \bold{3.99\;\times\;10^{-4}\;M}$ .

<h3>What is the relation between moles and volume?</h3>

The moles are the mass of substance with respect to the molar mass. The moles and volume relationship can be expressed in terms of molarity.

The molarity can be expressed as:

$\rm Molarity=\dfrac{Moles}{Volume}$