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vekshin1
22 days ago
15

The specific heats and densities of several materials are given below:

Chemistry
1 answer:
alisha [2.9K]22 days ago
6 0
The alteration in temperature recorded is 84.7°C. To determine this temperature change, we utilize the equation: q = mcΔT, where q is the heat absorbed, m the mass of the substance, and c the specific heat capacity. Here, the heat absorbed equals 1 kCal (or 1000 Cal), the steel mass amounts to 100 g, and the specific heat of steel is represented at 0.118 Cal/g.°C. Plugging in these values reveals the temperature change to be 84.7°C.
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21.7 mL of gas at 98.8 kPa is allowed to expand at constant temperature into a 52.7 mL container. What is the new pressure of th
alisha [2963]
The new pressure of the gas is calculated to be 40.7 kPa. Using the principle that P1 • V1 = P2 • V2, we can set 98.8 kPa (P1) multiplied by 21.7 mL (V1) equal to P2 (unknown pressure) multiplied by 52.7 mL (V2). To isolate P2, we rearrange the equation to P2 = (98.8 kPa • 21.7 mL) / 52.7 mL, resulting in P2 equal to 40.7 kPa.
8 0
1 month ago
A group of students is investigating how the addition of salt impacts the floatation of an egg in water. Four identical cups wer
VMariaS [2998]

Answer:

The dependent variable in this experiment is the egg's position above the water.

Explanation:

The dependent variable refers to the factor that is influenced by another variable.

On the other hand, the independent variable is what can be altered, affecting the dependent variable's outcome.

The controlled variable remains constant throughout the experiment.

In this setup, the amount of salt added acts as the independent variable, while the flotation level of the egg is the dependent variable, and the water volume in each cup represents the controlled variable.

7 0
23 days ago
Read 2 more answers
Find the molarity of 750 ml solution containing 346 g of potassium nitrate
lorasvet [2795]
For KNO₃, the mass is 346g. The molar mass can be computed as (39.098) + (14) + (15.99*3), which results in 101.068 gmol⁻¹. The volume of the solution is given as 750ml, equivalent to 0.75dm³. The formula for molarity is (mass of solute/molar mass of solute)*(1/volume of solution in dm³). Accordingly, molarity = (346/101.068)*(1/0.75), yielding 4.56 mol dm⁻³.
5 0
24 days ago
The first eighteen chemical elements on the periodic table are described below in a series of statements. The first 1S letters o
castortr0y [3046]
The question appears to be confusing. The periodic table consists of elements organized by increasing atomic number.
3 0
28 days ago
How can a piece of wood floating on water illustrate the condition of lowest potential energy and maximum
Tems11 [2777]

Answer:

By reducing the height of the center of gravity of the object in relation to its center of buoyancy

Explanation:

In the field of hydrostatics, for a floating object, the state of equilibrium corresponds to either a peak or a trough in potential energy. Stability in equilibrium occurs when the potential energy is minimized. Achieving a lower position of the center of gravity of the floating object compared to its center of buoyancy creates a stable equilibrium arrangement.

4 0
2 months ago
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