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ser-zykov [4K]
3 years ago
11

Which of the following is the best instrument to use to prepare a solution?

Chemistry
1 answer:
Taya2010 [7]3 years ago
4 0
What are the options?
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The nutritional information on a cereal box shows that one serving of dry cereal has 90 calories (actually kilocalories). If one
umka2103 [35]

Answer:

90 °C

Explanation:

First, we must know the specific heat capacity of water, which is defined as the energy required to heat 1 gram of water by one degree Celsius. The specific heat capacity of water is 1 cal·g⁻¹°C⁻¹.

The equation we will use is Q = mcΔt, where Q is the heat energy, m is the mass, c is the specific heat capacity, and Δt is the temperature change. We will rearrange the equation to solve for Δt and substitute the values:

Δt = Q / (mc) = (90 kcal)(1000 cal/kcal) / (1 kg)(1000 g/kg)(1 cal·g⁻¹°C⁻¹) = 90 °C

5 0
4 years ago
The decrease in the quality of water caused by the discharge of solid or liquid waste into it is called water pollution true or
mafiozo [28]

Answer:

The answer to this is TRUE.

3 0
3 years ago
An airplane flies at a constant speed of 920 km/h. How long will it take the plane to travel a distance of 1150 km?
rewona [7]

Answer:

1.25 hours or 75 minutes or 1 hour and 15 minutes

Explanation:

5 0
3 years ago
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AlCl3 + Na NaCl + Al Did Cl change oxidation number?
gizmo_the_mogwai [7]
Yes. If this is the balanced equation:

AlCl3 + 3Na —— 3NaCl + Al

then Al was reduced from a 3+ oxidation (to neutralize the 3- from the chlorine) to a 0 oxidation (elemental ground state).
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What ion does a base increase
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OH- is the ion that increases the concentration of a base
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