The table shows the specific heat of four substances—brick, dry soil, paper, and water. If all four substances were exposed to sunlight for the same amount of time, which substance would heat up the slowest?
The table shows the specific heat of four substances—brick, dry - 1

Answers

Answer 1
Answer:

Water would heat up the slowest if four substances were exposed to sunlight because it has the highest specific heatcapacity.

What is specific heat capacity?

Specific heat capacity is the amount of thermal energy required to raise the temperature of a system by one temperature unit (1°C) without any change of phase.

According to this question, a table comprising the specific heat of four substances were given. In the table, water has the highest specific heat capacity.

This means that water would heat up the slowest if four substances were exposed to sunlight because it has the highest specific heat capacity.

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Answer 2
Answer: The specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius. Therefore, a high value of specific heat would mean that more heat is needed in order for the temperature to increase. The correct answer would be water since it has the highest specific heat of the choices given.

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What percentage of atoms in the entire universe are hydrogen atoms?

Answers

The 90 percentage of atoms in the entire universe are hydrogen atoms.

What is the composition of atoms in universe?

  • The most abundant element is hydrogen.
  • The 90% mass of universe is made of hydrogen and 10% of helium atoms.

Why most of the universe is made of the hydrogen?

  • Since, hydrogen atom have only one proton and one electron and no neutron .

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the percentage of atoms in the universe that are hydrogen are 90%

Which of the following is type of bonding involves the complete transfer of a valence electron from a less electronegative atom to a more electronegative one?. a.ionic bonding.
b.metallic bonding.
c.covalent bonding.
d.hydrogen bonding

Answers

Answer: Option (a) is the correct answer.

Explanation:

When there is transfer of electrons between the two atoms then the bond formed is known as ionic bond.

In binary atomic systems, there is formation of ionic bond between a metal and non-metals. As a result, there will be high difference in electronegativity between the two atoms.

Therefore, this also shows potential for electrons transfer.

For example, NaCl is an ionic compound and also there is high difference in electronegativity between the Na and Cl atom.

Thus, we can conclude that ionic bonding is a type of bonding which involves the complete transfer of a valence electron from a less electronegative atom to a more electronegative one.

The answer is: a. ionic bonding.

Ionic bond is the electrostatic attraction between oppositely charged ions (cations and anions).  

For example, compound magnesium chloride (MgCl₂) has ionic bond.  

In this example, chlorine is large company, because it has greater electronegativity than magnesium (small company) and take electrons (assets) from it.

Magnesium (Mg) transfers two electrons, became positive cation, to chlorine (Cl), which became negative anion.  

Magnesium is metal from group 2 and chlorine is nonmetal from group 17 of the Periodic table.  

Electronegativity (χ) is a property that describes the tendency of an atom to attract a shared pair of electrons.


What is the chemical formula for zinc carbonate?(1) ZnCO3(2) Zn(CO3)2
(3) Zn2CO3
(4) Zn3CO3

Answers

The chemical formula for Zinc Carbonate is ZnCO3.

2.0 cm + 2.6 cm + 4.2 mm =

Please show work

Answers

Hi ;)!
So:
4.2 mm (/10) = 0.42 cm

2.0 cm + 2.6 cm + 0.42 cm =  5.02 cm ;)

Why does changing the volume of a container change the pressure of the gas in it?

Answers

Answer:

the answer is D

Explanation:

i did the test

When volume is decreased, the gas has less space in which to move, and therefore pressure increases as the gas is pushed together.

Chromium, calcium, and potassium are near each other on the periodic table and have some common characteristics but differ in chemical reactivity. Which lists these metals in order from most reactive to least reactive?calcium, chromium, potassium
chromium, calcium, potassium
potassium, calcium, chromium
potassium, chromium, calcium

Answers

Answer: The correct order is:

Potassium > calcium > chromium

Explanation:

Potassium belongs to the group of alkali metals with group number 1 in a periodic table. Potassium easily displaces hydrogen atom from the water molecule.

Where as calcium belongs to group (II) and easily displaces hydrogen atom from the water molecule.

In a reactivity series potassium is comes before the calcium metal which means that it is more reactive than calcium metal.

Potassium > calcium

Where as chromium metal is member of group 6 and chromium reacts with steam and acids to form hydroxides. But doesn't reacts with water(in liquid phase) which means it less reactive then potassium and calcium.

Potassium > calcium > chromium

potassium, calcium, chromium