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lina2011 [118]
3 years ago
5

Please help me with my 8th grade chemistry, I'm behind and don't understand it at all

Chemistry
2 answers:
padilas [110]3 years ago
7 0

When a material is heated, the kinetic energy of that material increases and its atoms and molecules move about more. This means that each atom will take up more space due to its movement so the material will expand. ... Some metals expand more than others due to differences in the forces between the atoms / molecules.

love history [14]3 years ago
5 0

determine whether density can be classified as an intensive property. Examples of intensive properties include color, temperature, hardness, and density. In this lab density, the compactness of a substance, will be calculated for aluminum. Then by examining if the density is constant in five trials, which use various amounts of aluminum, the conclusion of whether density is indefinitely an intensive property for solid states of matter can be made.utilize two ionic compounds and facilitate a precipitation reaction in order to observe how the Law of Conservation of Mass applies to chemical processes, specifically, precipitation reactions

]

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Which best describes the process that occurs when liquid water becomes<br> ice?
garri49 [273]

Answer:

Freezing

Explanation:

When a liquid goes to a solid, this process is called freezing.

7 0
2 years ago
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Calculate the freezing point (0°C) of a 0.05500 m aqueous solution of glucose.
Rainbow [258]

Answer:

-0.1767°C (Option A)

Explanation:

Let's apply the colligative property of freezing point depression.

ΔT = Kf . m. i

i = Van't Hoff factot (number of ions dissolved). Glucose is non electrolytic so i = 1

m = molality (mol of solute / 1kg of solvent)

We have this data → 0.095 m

Kf is the freezing-point-depression constantm 1.86 °C/m, for water

ΔT = T° frezzing pure solvent - T° freezing solution

(0° - T° freezing solution) = 1.86 °C/m . 0.095 m . 1

T° freezing solution = - 1.86 °C/m . 0.095 m . 1 → -0.1767°C

4 0
2 years ago
A cart is rolling across the floor at a constant velocity of 2 m/s to the right. The cart is pushed again to the right, and it s
galben [10]

Answer: the answer is c.The unbalanced push causes the cart to speed up.

Explanation:

The application of an unbalanced force (the push) causes the cart to speed up. When the cart is in constant motion, the forces are balanced and there is no speeding up. Once an unbalanced force is added, the cart's speed changes.

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3 years ago
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The Earth only has a limited supply of fresh water; eventually, we will have to use ocean water. We will purify ocean water thro
Ad libitum [116K]
I believe it is all of the above
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3 years ago
________ are molecules whose general structure includes a central carbon with a carboxyl group, an amine group, a hydrogen molec
IgorLugansk [536]

The amino acids are the molecules where we can found the carboxyl group (-COO^{-}), amino group (-NH_{2}), hydrogen atom (H) and a residual R-group. On the structure of the residual R-group the name of the amino acid depends. Like if R is hydrogen (H) the amino acid is alanine; If R- group is a phenyl group i.e. -C_{6}H_{5}, the compound is called phenyl alanine. The structure of the general amino acid skeleton can be shown as-

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2 years ago
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