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Lorico [155]
3 years ago
9

Maria wants to determine which type of disinfectant kills the most bacteria.

Chemistry
2 answers:
murzikaleks [220]3 years ago
6 0

Answer:

well she can test both of the soap by putting one on and plate and another on the other plate and which ever is cleaner is your answer

morpeh [17]3 years ago
4 0

Answer:

Put the same amount and species of bacteria on ten identical plates, and add a different disinfectant to each plate.

Explanation:

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Calculate the kilojoules needed to heat 231 g of gold from 18 ∘C to 195 ∘C.
LuckyWell [14K]

5.27 kJ of heat are required to heat 231 g of gold from 18 °C to 195 °C.

We have 231 g of gold at 18 °C and supply it with heat to increase its temperature to 195 °C. We can calculate the amount of heat required using the following expression.

Q = c \times m \times \Delta T

where,

  • Q: heat
  • <em>c: specific heat capacity of gold</em> (0.129 J/g.°C)
  • m: mass
  • ΔT: change in the temperature

Q = \frac{0.129 J}{g.\° C}  \times 231 g \times (195 \° C - 18 \° C) = 5.27 \times 10^{3} J = 5.27 kJ

5.27 kJ of heat are required to heat 231 g of gold from 18 °C to 195 °C.

You can learn more about heating here: brainly.com/question/1105305

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