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maksim [4K]
3 years ago
6

I need help finding this out

Chemistry
1 answer:
pishuonlain [190]3 years ago
8 0
Its either b or c, but i think its b
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4. How many moles of Ca(HCO3)2 are present in 4.6 liters of a 3.5 molarity<br> solution?
weeeeeb [17]
Multiply the volume by molarity to get moles.

3.5 M • 4.6 L = 16.1 mol Ca(HCO3)2
8 0
3 years ago
Non examples of chemical change<br> List some please
Ivan

Answer:

Crushing a can.

Melting an ice cube.

Boiling water.

Mixing sand and water.

Breaking a glass.

Dissolving sugar and water.

Shredding paper.

Chopping wood.

3 0
3 years ago
3) The amount of energy it takes to eject an electron from the surface of a metal is 4.15 x 10-19J. If light with a wavelength o
Triss [41]
We can use two equations to solve this.
(1) - E = hf
        E = Energy (J)
        h = plank's constant (6.63 × 10⁻³⁴ J s)
        f  = frequency (Hz)

(2) - v = fλ
        v = velocity of the wave (m/s)
       f  = frequency (Hz)
       λ = wavelength (m)

the λ for the given wave is 625nm (625 x 10⁻⁹ m) and the velocity of the wave is equal to speed of light (3 x 10⁸ m/s) since the wave is a light.

hence we can find the frequency of the wave by using (2) formula.
3 x 10⁸ m/s = f x 625 x 10⁻⁹ m
                f  = 4.8 x 10¹⁴ Hz

by using calculated frequency and (1) formula, we can find the energy of the wave.
 E = 6.63 × 10⁻³⁴ J s x 4.8 x 10¹⁴ Hz
 E = 3.18 x 10⁻¹⁹ J

The energy of wave is less than energy needed to eject an electron.
Hence, the metal does not eject electron.
4 0
3 years ago
If more powdered Kool-Aid is added to the same amount of water, what happens to the solution?
Furkat [3]

Answer:

The Kool-Aid mix by itself is a solid, made up of sugar, flavorings, and dyes to color it. When you add it to the water, this powdered mix seems to disappear.  If we kept adding Kool-Aid mix to the solution, the water would keep dissolving the mix until it became saturated, or until it couldn't dissolve any more mix.

Explanation:

3 0
3 years ago
A disaccharide is formed by the chemical bonding of
Agata [3.3K]

Answer:

The correct option is A.

Explanation:

A disaccharide refers to a sugar that is formed by the chemical bonding of two monosaccharides which are joined together via glycosidic bond.

A monosaccharide refers to any sugar that can not be reduced further to give a simpler sugar. When two monosaccharides residue come together they form a disaccharide ('Di' means two).

One good example of monosaccharide is glucose. When two glucose molecules or glucose and another monosaccharide join together they give rise to disaccharide such as surcose, lactose and maltose. The components of these disaccharides are given below:

1. Sucrose (Table sugar): Glucose + fructose.

2. Lactose (Milk sugar): Glucose + galactose.

3. Maltose: Glucose + glucose.

7 0
3 years ago
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