What is the element
The element which is a non-metal and present in the same group as lead is carbon as they both have four electrons in their valence shell.
An element is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.
Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.
The number of protons in the nucleus is the defining property of an element and is related to the atomic number.All atoms with same atomic number are atoms of same element.
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b.) infrared
c.) radio
d.) gamma rays
Answer:
The answer is radio waves
Explanation:
• The solubility of Solute ___ increases the most as temperature increases.
• The solubility of Solutes C and D is the same at __°C.
• As the temperature increases from 0 to 100, the solubility only changes by about __ grams for Solute B.
Answer:
Decreases
E
20
5
Explanation:
Answer:
Decreases
E
20
5
Explanation:
Mass of water: 43 g
Explanation:
When a substance is heated, the temperature of the susbtance increases according to the equation:
where
Q is the amount of heat supplied to the substance
m is the mass of the substance
C is the specific heat capacity of the substance
is the increase in temperature
In this problem, we have:
Q = 4300 J is the heat absorbed by the water
C = 4200 J/gC is the specific heat capacity of water
is the increase in temperature
By re-arranging the equation, we can find the mass:
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The mass of the water sample can be calculated using the formula for heat absorption: Q = mcΔT.
Given that the water sample absorbed 4300 joules of heat and the temperature increased from 15°C to 39°C, the mass of the water sample is approximately 43.03 grams.
This physics problem can be solved by using the formula for heat absorption:
Q = mcΔT,
where Q is the heat absorbed (in joules), m is mass (in grams), ΔT is the change in temperature (in °C) and c is the specific heat capacity. For water, c is 4.186 joules/gram°C.
The change in temperature (ΔT) of the water sample is the final temperature (39°C) minus the initial temperature (15°C), which equals 24°C.
Using the given value for Q (4300 joules), we rearrange the formula to calculate m (mass):
m = Q / (cΔT) = 4300 / (4.186*24) ≈ 43.03 grams.
Thus, the mass of the water sample is approximately 43.03 grams.
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