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4 years ago

How are man-made elements created?

Chemistry

1 answer:

choli [55]4 years ago

3 0

Scientists can by bombarding two lighter elements that together add up to the mass of the desired new element.

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7. A small roll of double-sided tape is 6.35m long and 1.2 x 102m wide. What is the total area that could be

allsm [11]

The total area that could be covered by this roll of tape is 0.1524 m².

<h3>What is the double-sided tape?</h3>

A double-sided tape is a tape that can be stick from both sides. It is used to stick something on a surface. A rectangle is an object that has four sides in which two sides are equal.

If we unroll the tape, we will see that it is a rectangle with dimensions:

length = 6.35 m

width = 1.2 x 10⁻² m

Since the tape has two sides, the total area of the tape is:

A = 2 x (length x width)

A = 2 x 6.35 x 1.2 x 10⁻²

A = 0.1524 m²

Thus, the total area of the tape is 0.1524 m²

To learn more about the area of rectangle, refer to the link:

brainly.com/question/8663941

#SPJ1

7 0

2 years ago

A mixture is made of 40 ml of salt water to 200 ml of solution. What percent of the solution is salt water?

Serggg [28]

Answer:

16.7%

Explanation:

40 ml of salt water + 200 ml of solution = 240 ml

40/240 = 4/24 = 1/6=16.7%

5 0

3 years ago

Arrange the eluting power of the listed solvents in normal-phase chromatography. The highest eluting power solvent is number 1;

BabaBlast [244]

Answer:

Explanation:

Part a

Normal Phase Chromatography

In the normal phase chromatography, the eluting power is highest for the solvent which has the highest polarity.

So from the given solvents as Methanol, Dichloromethane and Ethyl Acetate

the relative polarities are given as

Methanol=0.762

Dichloromethane (methylene chloride)=0.309

Ethyl Acetate=0.228

So the numbers are given as

Methanol :1

Dichloromethane (methylene chloride):2

Ethyl Acetate:3

Reverse Phase Chromatography

In the reverse phase chromatography, the eluting power is highest for the solvent which has the lowest polarity.

So from the given solvents as diethyl ether , water and toluene

the relative polarities are given as

Diethyl ether=0.117

Water=1.0

Toluene=0.099

So the alphabets are given as

Toluene :A

Diethyl ether: B

Water:C

3 0

3 years ago

If 7.8 grams of methane gas is reacted with excess oxygen gas yielding 16.0 grams of water, what was the percent yield of the re

Amanda [17]

You basically just multiply those two and you get your answer that simple hope that helps

7 0

3 years ago

What color is an orange?

Tema [17]

Answer:

orange

Explanation:

5 0

3 years ago