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Olegator [25]
3 years ago
9

Holly wants to design a test to find out how fast her friend Jill can walk from one end of the playground to the other.

Chemistry
2 answers:
diamong [38]3 years ago
7 0
Answer: D

the answer can not be A because the type of shoes jill is wearing doesn’t have anything to do with her speed

The answer can not be B because dogs are not any part of this experiement

the answer can not be C because they are testing the speed of a person not a bike
Orlov [11]3 years ago
6 0

Answer:

D

Explanation:

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What property of the elements is considered
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Answer:

electro negativity

type of elements

the number of energy levels

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4 0
3 years ago
Moles /Number of Particles Con
Olin [163]

(2.03x10^22)/(6.02x10^23) = .033721 mol Li

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7 0
3 years ago
he combustion of propane (C3H8) is given by the balanced chemical equation C_3H_8+5O_2\longrightarrow3CO_2+4H_2O C 3 H 8 + 5 O 2
Basile [38]

Answer:

290 grams

Explanation:

Let's begin by writing the balanced chemical equations:

C_{3}H_{8} +5O_{2} --->3CO_{2} +4H_{2}O

Then we calculate the number of moles in 97g of propane.

n(propane)=\frac{mass}{molarmass} =\frac{97g}{44.1g/mol}=2.1995mol

According to the balanced chemical equation, one mole of propane produces 3 moles of carbon dioxide. So the available number of moles of propane must be multiplied by three to work out the number of carbon dioxide produced.

n(carbon dioxide)= 2.1995mol*3 = 6.5985mol

mass(carbon dioxide) = moles * molar mass

                                   = 6.5985 mol * 44.01 g/mol

                                   = 290 grams

4 0
3 years ago
What is meant by Critical temperatue?
yuradex [85]

Answer:

The critical temperature of a substance is the temperature at and above which vapour of the substance cannot be liquefied, no matter how much pressure is applied.

4 0
3 years ago
How does bond order correspond to phase? Use the drawing of MO energy diagram to predict the bond order of [Be2]+ and [Be2]−. De
erik [133]
Be2 - 1/2 is equal to be 3 over 3.4
7 0
3 years ago
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