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True [87]
3 years ago
9

(This question was deleted last month)

Chemistry
1 answer:
4vir4ik [10]3 years ago
6 0

Answer: Fireworks exploding is a chemical change.

Explanation: Lighting gunpowder, and making the explosion is a chemical change.

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Using the arrangement of the periodic table, which elements are the most similar to phosphorus in properties?
Nana76 [90]

Answer:

Nitrogen and Arsenic

Explanation:

Since Phosphorous and Arsenic both are Nitrogen group elements i.e. Group(Va)

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4 years ago
What are the two variables that affect the electric force between two objects?
givi [52]

Explanation:

The electrical force between two objects is given by the formula as follows :

F=\dfrac{kq_1q_2}{d^2}

k is electrostatic constant

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d is distance between charges

So, the two force between two charged objects depends on the product of charges and distance between charges.

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3 years ago
What events caused the formation of most islands in the South Pacific?
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3 years ago
How many liters of HF can be made from 50.0 g of a 12.0M HF solution
aliina [53]

Answer:

Explanation:

The first thing we calculate are the moles: (50.0 g)/(20.0063 g/mol) =2.5 moles  

Then we use the inverse formula for the molarity: (2.5 mol)/(12.0 M) = 0.208 L

My bad, I pressed the wrong button for answer!

5 0
3 years ago
A cube of aluminum (density = 2.70 g/ml) has a mass of 17.2 g. what is the edge length of the cube?
Helen [10]
<span>The formula for mass, which is mass = density x volume, can be rewritten as volume = mass/density. We can deduce the volume of the cube as the mass and density are given: 17.2g/2.7g/ml = 6.37ml. Now that the volume of the cube is known, we can deduce the edge length. Volume = length x width x height, so 6.37 = X^3. We then take the cube root of 6.37 to discover the value of x, which will be the edge length of the cube. The edge length of the cube is 1.85 cm.</span>
8 0
3 years ago
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