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Mkey [24]
3 years ago
10

What is 0.0745 in scientific notation?

Chemistry
2 answers:
zaharov [31]3 years ago
8 0

Hi! Here's the answer!

7.45E2 OR 7.45*10^{-2}

(im pretty sure im correct, so if you'd like please give me brainly :D)

katen-ka-za [31]3 years ago
4 0

Answer:

7.45 × 10^{-2}

Explanation:

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In the Table of Atomic Particles, various symbols have two numbers. The top number represents the atomic mass of the particle, w
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Atomic number and number of electrons.
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Which element in Group 17 is the most active nonmetal? (1) Br (2) I (3) Cl (4) F
Maksim231197 [3]

The element of the group 17 that is most active non metal is fluorine.

The group 17 of the periodic table contains bromine(Br), iodine(I), Chlorine(Cl) and fluorine(F).

Among all the elements of the group 17. Fluorine is the smallest in size.

Because of the small size of fluorine it has the highest electronegativity in group 17.

This high electronegativity makes it a very active non metal. It provides a very high oxidizing power and low dissociation energy to the fluorine atom.

Also because of the very small size the source of attraction between the nucleus and the electrons is very high in floor in atom.

It reacts readily to form oxides and hydroxides.

So, we can conclude here that fluorine is the most active non metal of group 17.

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7 0
1 year ago
What mass, in grams, of sodium sulfate is needed to make 230.5 g of a 3.5 % (m/m) aqueous solution of sodium sulfate?
andreev551 [17]

The percent concentration of a solution can be calculated from; mass of solute /mass of solution * 100. The mass of the solute here is 8.1 g.

<h3>What is concentration?</h3>

The term concentration refers to the amount of solute presnt in a solution. There are many ways of expressing concentration such as molarity, molality and percentage.

Here;

mass of solution = 230.5 g

Percent of solute =  3.5 %

3.5 = x/ 230.5 * 100

3.5 = 100x/230.5

230.5(3.5) = 100x

x = 230.5(3.5) /100

x = 8.1 g

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QUICK! Which best explains how the collisions of materials in space contribute to the formation of layers in protoplanets?
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B. The collisions release heat, which results in the heating and subsequent melting, sinking, and rising of materials.

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Got it correct on edge

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