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shutvik [7]
3 years ago
12

How many Signifact figures does 0.000300

Chemistry
1 answer:
Deffense [45]3 years ago
6 0

Answer:

3 significant digits

Explanation:

The first 0 don't count (that's the rule in significant digits). So 3,0,0 are left over. Count them and total will be 3 significant digits. (remember the last zero count if there is a decimal but the first zeros doesn't count even with the decimals)

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Identify the two types of radiation shown in the figure below. Explain your reasoning.
saul85 [17]

Answer:- \gamma and \alpha radiation.

Explanations:-  Alpha particle is helium nucleus with two protons and two neutrons and so it has +2 charge where as gamma is a form of light, so these are rays and not particles. Since these are rays, the charges for gamma rays is zero means they are neutral.

When alpha particles are passed through electromagnetic field they are repelled by the positive plate and attracted by the negative plate as there is an attraction between opposite charges. So, the line we see towards positive plat is representing an alpha particle radiation.

Since gamma rays are neutral, they are not deflected in electromagnetic field and go straight. So, the other line in the diagram is representing gamma rays radiation.

5 0
3 years ago
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How many grams of Zn could be extracted from 300. g of ZnS
BabaBlast [244]
150grams of zinc can be extracted
7 0
3 years ago
What is the name for a substance made of billions of oppositely charged ions<br> joined together?
bija089 [108]

Answer:

Ionic substance

Explanation:

An ionic substance is formed when oppositely charged ions link up to form an infinitely large lattice structure that can only be described in terms of unit cells.

Ionic substances may consist of billions of oppositely charged ions. Ionic substances are hard, have high melting and boiling points and do not conduct electricity in the solid state because the ions are not free in the solid state.

However, in solution or molten state, the substance conducts electricity since the ions which are the charge carriers are now mobile.

8 0
3 years ago
How do you maximize the products of chemical reactions?
Kitty [74]

Answer:

1. increase the temperature

2. increase the concentration of reactants

3. increase the surface area of the reactants

4. use a catalyst

5. remove the product as it's formed

Explanation:

for a chemical reaction to take place, the bonds between atoms in the reactants are broken, the atoms rearrange and new bonds between the atoms are formed to make the products.

3 0
3 years ago
How many moles of n are in 0.225 g of n2o?
katrin2010 [14]
<span>First, divide the mass of N2O by it's molar mass of 46 g/mol to determine the number of moles of N2O, then multiply that number by two since there are two moles of N in each mole of the compound N2O. This results in a final answer of 9.78X10^-3 moles of N in 0.225g of N2O.</span>
5 0
3 years ago
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