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dedylja [7]
4 years ago
14

Which statement applies to the horizontal rows or periods in the periodic table? A. The properties are all the same. B. The elem

ents have the same number of electrons. C. The properties change going across each row. D. The elements in each row combine easily.
Chemistry
2 answers:
Tom [10]4 years ago
8 0
D, I think. I did this test soo
Papessa [141]4 years ago
3 0
D I'm pretty sure. but I'm not 100 percent sure
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maks197457 [2]
Well there are 60 seconds in a minute and 60 minutes in an hour and 24 hours in a day so you would do 60×60 which is 3600. then you would multiply 3600 by 24 which would give you the number of seconds in a day, 86400. since you need the number of seconds in 2 days just multiply the amount by 2. your answer is: There are 172,800 seconds in two days.
4 0
4 years ago
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What is the oxidation state of S in H₂SO4?<br> OA. +8<br> OB. +6<br> OC. -4<br> OD. -2
slega [8]

Answer:

B.) +6

Explanation:

To find the oxidation number of sulfur, we can assume the oxidation numbers of the other elements.

What I mean is, oxygen (O) always has an oxidation number of (-2). That being said, if there are 4 oxygen atoms, oxygen is contributing -8 overall. We also know that hydrogen generally has an oxidation number of (+1). Like before, if there are 2 hydrogens, it must be contributing +2.

If the overall molecule is neutral, we have to get these charges to balance out.

In essence, -8 + 2 + ? = 0?

If you combine the charges from oxygen and hydrogen, you are left with -6. Therefore, to make the molecule neutral, sulfur must have an oxidation number of +6.

5 0
3 years ago
What happens when the compound MgO is formed?
OleMash [197]

I would say that the first answer choice makes sense since the charge of Oxygen is +2. But I may be wrong, try it out!

5 0
4 years ago
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What is the mole ratio of D to A in the generic chemical reaction? 4A + B --&gt; C + D​
storchak [24]
<h3>Answer:</h3>

Mole ratio of D to A is 1 : 4

<h3>Explanation:</h3>

We are given the generic chemical equation;

4A + B → C + D​

We are supposed to determine the mole ratio of D to A

What is mole ratio?

  • Mole ratio is the ratio of the number of moles of reactants or products in a chemical reaction.
  • We determine the mole ratio using the coefficients of reactants or products in question.

For example;

  • In the equation, 4A + B → C + D​, the coefficient of A is 4 while the coefficient of D is 1.
  • This means, 4 moles of A reacts with 1 mole of b to produce 1 mole of C and 1 mole of D
  • Thus, mole ratio of D to A  is 1 : 4
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3 years ago
Wich of the following is a unit of volume in the english system of mesurement​
ch4aika [34]

Answer:

uhh its gallon

Explanation:

5 0
4 years ago
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