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4 years ago

Which man made element is in an anomalous location

Chemistry

2 answers:

krok68 [10]4 years ago

6 0

the man made element that is in an anomalous location is Transuranium.

Julli [10]4 years ago

5 0

Among the elements from atomic number 1-92 are stable and generally found in nature.

Those elements that are not known to exist in nature, but have been formed in a human-designed system are known as man-made elements. The chemical elements with atomic number greater than 92 (which is the atomic number of Uranium, $U$ ) are man-made elements and are known as transuranium elements. These elements are unstable.

Hence, transuranium elements are man made elements in an anomalous location.

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Consider the following unbalanced chemical equation. C5H12(l) + O2(g) → CO2(g) + H2O(l) If 21.9 grams of pentane (C5H12) are bur

Marina CMI [18]

Answer : The mass of water produced will be 32.78 grams.

Explanation : Given,

Mass of $C_5H_{12}$ = 21.9 g

Molar mass of $C_5H_{12}$ = 72.15 g/mole

Molar mass of $H_2O$ = 18 g/mole

First we have to calculate the moles of $C_5H_{12}$ .

$\text{Moles of }C_5H_{12}=\frac{\text{Mass of }C_5H_{12}}{\text{Molar mass of }C_5H_{12}}=\frac{21.9g}{72.15g/mole}=0.3035moles$

Now we have to calculate the moles of $H_2O$ .

The balanced chemical reaction will be,

$C_5H_{12}(l)+8O_2(g)\rightarrow 5CO_2(g)+6H_2O(l)$

From the balanced reaction we conclude that

As, 1 mole of $C_5H_{12}$ react to give 6 moles of $H_2O$

So, 0.3035 moles of $C_5H_{12}$ react to give $0.3035\times 6=1.821$ moles of $H_2O$

Now we have to calculate the mass of $H_2O$ .

$\text{Mass of }H_2O=\text{Moles of }H_2O\times \text{Molar mass of }H_2O$

$\text{Mass of }H_2O=(1.821mole)\times (18g/mole)=32.78g$

Therefore, the mass of water produced will be 32.78 grams.

3 0

3 years ago

Reaction has a theoretical yield of 56.9 g. when the reaction is carried out, 36.6 g of the product is obtained.

musickatia [10]

I'm assuming you need to know the percentage yield of the reaction
To calculate the percentage yield = (actual yield x 100%) / predicted yield

actual yield is 56,9 g
predicted yield is 36,6g ( is the amount that's expected if nothing had got lost)

(56,9 x100)/36,6=
= 155%

7 0

4 years ago

How do you INCREASE potential energy?

fgiga [73]

You have to move higher; potential energy depends on height and mass.

4 0

3 years ago

Why are graphs used to understand an objects motion?

S_A_V [24]

Hello!

Graphs are used to understand an object's motion because they can show the exact location of the object at any given moment.

This is done with the help of a reference system. The most common reference system is the Cartesian coordinate system, which describes the location of an object through a set of 2 or 3 coordinates (depending if the system is in 2D or 3D).

Studying graphs of movement, we can know if the movement is cyclical, or the direction of the movement, determine tendencies and overall getting an unambiguous and precise understanding of the motion.

Have a good day!

5 0

4 years ago

Which of the following is a step in the conversion of 2.5 hms to L?

LUCKY_DIMON [66]

Helloo

To convert to L
2.5 hm^3 * (100m/hm)^3 *1000 L/m^3 gives a volume of 2.5*10^9 L

Have a nice day

6 0

3 years ago