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Pani-rosa [81]
2 years ago
10

Is this correct? please check

Chemistry
1 answer:
Reil [10]2 years ago
4 0

Answer:

A is the correct option

Explanation:

batteries have chemical energy and will convert to electricity and when reached to bulb, it emits light as electromagnetic rays

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What is the correct ionic formula when mg2+ and p3− react?
Mumz [18]

Answer: Ionic formula will be Mg_3P_2.

Explanation: Mg^{2+} and P^{3-} ions will form a ionic compound. Ionic compounds have both metals and non-metals.

Here Mg^{2+} is a metal and P^{3-} is a non-metal.

The net charge on any compound must be 0.

So we need 2 phosphate ions to balance the charge on Mg^{2+} ions. Similarly we need 3 Magnesium ions to balance the charge on P^{3-} ions.

Criss-crossing the charges, we will get the formula as Mg_3P_2

Criss-crossing is shown in the image below.

6 0
3 years ago
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Why does the nitrogen concentration decrease after hydrogen is added? n2(g)+3h2(g)⇌2nh3(g) why does the nitrogen concentration d
Leno4ka [110]

<span>The chemical reaction of a reversible reaction is actually governed by Le Chatelier’s principle. It states that when more reactants are introduced into the system, the reaction will proceed forward to create more products. So since Hydrogen is a reactant and Nitrogen is also reactant so adding more Hydrogen makes more products hence reducing the Nitrogen concentration.</span>

3 0
3 years ago
A store sell 21 piece of clothing every 45 minutes.How long will it take the store to sell 100 pieces of clothing?
zmey [24]

Explanation:

<em>2</em><em>1</em><em> </em><em>piec</em><em>e</em><em> </em><em>=</em><em>4</em><em>5</em><em> </em><em>mins</em>

<em>100</em><em> </em><em>pieces</em><em>=</em><em> </em><em>x</em>

<em>on</em><em> </em><em>cross</em><em> </em><em>mul</em><em>tiplicati</em><em>on</em>

<em>2</em><em>1</em><em>x</em><em>=</em><em>4</em><em>5</em><em>×</em><em>1</em><em>0</em><em>0</em><em>m</em><em>i</em><em>n</em><em>s</em>

<em>2</em><em>1</em><em>x</em><em> </em><em>=</em><em>4</em><em>5</em><em>0</em><em>0</em><em>m</em><em>i</em><em>n</em><em>s</em>

<em>x</em><em> </em><em>=</em><em>4</em><em>5</em><em>0</em><em>0</em><em>m</em><em>i</em><em>n</em><em>s</em><em>÷</em><em>2</em><em>1</em>

<em> </em><em> </em><em>=</em><em>2</em><em>1</em><em>4</em><em>.</em><em>3</em><em>m</em><em>i</em><em>n</em><em>s</em><em> </em><em>or</em><em> </em><em> </em><em>3</em><em>.</em><em>5</em><em>7</em><em>h</em><em>r</em><em>s</em>

3 0
2 years ago
What is the mass of 0.28 mole of iron?
vredina [299]

Answer:

Your answer should be 15.68 grams.

Explanation:

Seeing as 1 mole has a mass of 56 g, 56*0.28 would get you 15.68 g.

6 0
3 years ago
In the second step of this reaction, isocyanic acid reacts to form melamine and carbon dioxide: hnco(l)→c3n3(nh2)3(l)+co2(g) bal
slava [35]

Formula of isocyanic acid is HNCO. It colourless, volatile compound. It is poisonous inorganic compound. Melamine is synthesized from urea. The reaction involves two steps. In first step, urea gets converted to isocyanic acid  which is an intermediate. In the second step, isocyanic acid gives melamine (molecular formula C₃H₆N₆) and carbon dioxide (CO₂). The balanced chemical reaction involved in second step is given below:

6 HNCO → 1 C₃N₃(NH₂)₃ + 3CO₂

The co-efficient of the reaction are: 6, 1, 3

7 0
3 years ago
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