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Sav [38]
3 years ago
7

How many valence electrons are in the chemical Hafnium?

Chemistry
2 answers:
suter [353]3 years ago
5 0
4 Electrons g because i just had it rs
djverab [1.8K]3 years ago
4 0

Answer:

Their are 4 electrons just had the same problem

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What are the products in a chemical equation located?
Arturiano [62]

Answer:

The right-hand side

Explanation:

A chemical equation describes a chemical reaction. Products are the end-result of the reaction and are written on the right-hand side of the equation.

7 0
3 years ago
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Which of the following functional groups acts most like an acid in water? A) carboxyl B) amino C) carbonyl D) hydroxyl.
Anestetic [448]

Answer : A - carboxyl group.


The carbon in the carboxyl group is bonded to a hydroxyl group and also it is double bonded to an oxygen group.


The carboxyl group when it is dissolved in a solution donates it's hydrogen ion(H+ ion). When it is dissolved in water, the carboxyl group loses its H+ ion to form negatively charged ion.


RCOOH + H2O⇄RCOO- + H3O+


Thus the carboxyl group act as an acid when dissolved in water.

8 0
3 years ago
What volume of oxygen gas is released at STP if 10.0 g of potassium chlorate is decomposed? (The molar mass of KClO3 is 122.55 g
ArbitrLikvidat [17]
<span>KCl<span>O3</span><span>(s)</span>+Δ→KCl<span>(s)</span>+<span>32</span><span>O2</span><span>(g)</span></span>

Approx. <span>3L</span> of dioxygen gas will be evolved.

Explanation:

We assume that the reaction as written proceeds quantitatively.

Moles of <span>KCl<span>O3</span><span>(s)</span></span> = <span><span>10.0⋅g</span><span>122.55⋅g⋅mo<span>l<span>−1</span></span></span></span> = <span>0.0816⋅mol</span>

And thus <span><span>32</span>×0.0816⋅mol</span> dioxygen are produced, i.e. <span>0.122⋅mol</span>.

At STP, an Ideal Gas occupies a volume of <span>22.4⋅L⋅mo<span>l<span>−1</span></span></span>.

And thus, volume of gas produced = <span>22.4⋅L⋅mo<span>l<span>−1</span></span>×0.0816⋅mol≅3L</span>

Note that this reaction would not work well without catalysis, typically <span>Mn<span>O2</span></span>.


8 0
3 years ago
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Global winds are directly caused by the Earth's rotation and
Natali5045456 [20]

Answer:

A the uneven heating of earths surface

Explanation:

Because earths rotates on its axis, circulating air is deflected torward the right in the northern hemisphere and toward the left Southern Hemisphere. This is called the coriolis effect

5 0
3 years ago
What does a high number on the pH scale say about a solution?
erik [133]

Explanation:

A is cortect answer dsfa

8 0
1 year ago
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