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erastova [34]
3 years ago
11

A student is asked to identify and element that is pale yellow brittle solid and does not conduct electricity. At which location

in this periodic table would the element most likely be found?

Chemistry
2 answers:
KengaRu [80]3 years ago
6 0

Answer: 3, just took the test

Explanation:

disa [49]3 years ago
3 0

Answer:

Far right

Explanation:

The qualities indicated here are of the element Sulphur (S) and any element of same qualities i.e color pale yellow, nature solid, electrical conductivity none, should be placed at far right corner of the periodic table or position 3 mentioned in the attached picture.

Hope it help!

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Germaine wants to know exactly how acidic lemon juice is. Which of these can tell him the pH most precisely? A. pH probe B. indi
Vlada [557]

Answer:

pH probe

Explanation:

A pH probe is the most accurate and consistent way of measuring pH. While pH paper and an indicator solution is viable, the most precise way would be to use a pH probe or meter

8 0
3 years ago
A white powder, when heated, produces a colourless gas and a black solid. Is the white powder an element? I need reasons please
NeTakaya

Answer:It is not an element because elements are the purest form of a substance; hence, they are no longer broken down by heating

Explanation:

4 0
4 years ago
In a calorimetry experiment 2.50 g of methane is burnt in excess oxygen. 30% of the
zzz [600]

The total energy released per gram of methane in the experiment is 119941.33 J/g

<h3>How to determine the change in the temperature of water</h3>
  • Initial temperature of water (T₁) = 25 °C
  • Final temperature of water (T₂) = 68 °C
  • Change in temperature (ΔT) = ?

Change in temperature (ΔT) = T₂ – T₁

Change in temperature (ΔT) = 68 – 25

Change in temperature (ΔT) = 43 °C

<h3>How to determine the heat absorbed by the water</h3>

The absorbed by the water can be obtained as illustrated below:

  • Mass of water (M) = s00 g
  • Change in temperature (ΔT) = 43 °C
  • Specific heat capacity of the water (C) = 4.184 J/gºC
  • Heat (Q) =?

Q = MCΔT

Q = 500 × 4.184 × 43

Q = 89956 J

<h3>How to determine the energy released by methane in the experiment</h3>
  • Heat absorbed by water = 89956 J
  • Percentage of heat absorbed by water = 30%
  • Heat released by methane =?

Heat absorbed by water = 30% of heat released by methane

89956 = 30% × heat released by methane

89956 = 0.3 × heat released by methane

Divide both sides by 0.3

Heat released by methane = 89956 / 0.3

Heat released by methane = 299853.33 J

<h3>How to determine the heat released per gram of methane</h3>
  • Heat released by methane (Q) = 299853.33 J
  • Mass of methane (m) = 2.5 g
  • Heat per gram (ΔH) =?

Q = m × ΔH

Divide both sides by m

ΔH = Q / m

ΔH = 299853.33 / 2.5

ΔH =119941.33 J/g

Learn more about heat transfer:

brainly.com/question/6363778

#SPJ1

8 0
2 years ago
Multiple Choice
Georgia [21]

Answer:

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Explanation:

The answer is very obvious you need to maintain a positive attitude while studying.

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