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4 years ago

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How do you know which elements increases or which elements decreases on a Ionisation graph? Like how can you figure out that the

se elements will increase on the graph and which will decrease?

1 answer:

Y_Kistochka [10]4 years ago

4 0

Explanation:

There is a trend in the periodic table.

I.E increases up the group and across the period. So you know that metals have less I.E compared to non-metals.

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2 AgNO3(aq) + CaCl2(aq) -----> 2 AgCl(s) + Ca(NO3)2(aq)

yan [13]

5.732 grams of AgCl is formed when 0.200 L of 0.200 M AGNO3 reacts with an excess of CaCl2.

Explanation:

The balanced equation:

2 AgNO3(aq) + CaCl2(aq) -----> 2 AgCl(s) + Ca(NO3)2(aq)

data given:

volume of AgNO3 = 0.2 L

molarity of AgNO3 = 0.200 M

atomic weight of AgCl= 143.32 gram/mole

from the formula, number of moles can be calculated

Molarity = $\frac{number of moles}{volume in litres}$

number of moles of AgNO3 = 0.04

From the reaction:

2 moles of AgNO3 reacts to form 2 moles of AgCl

0.04 moles of AgNO3 reacts to form x mole of AgCl

$\frac{2}{2}$ = $\frac{x}{0.04}$

= 0.04 moles of AgCl is formed

mass of AgCl formed is calculated by multiplying number of moles with atomic mass of AgCl

mass of AgCl = 0.04 x 143.32

= 5.732 grams of AgCl is formed.

4 0

3 years ago

Help please!!! My science homework is due in 2 days and I need help!

sertanlavr [38]

1) <em>Because the crystals do not have much time to develop if the lava cools fast, they are quite tiny. If the lava cools gradually, the crystals will have ample time to form and become huge. The size of crystals in an igneous rock is a good predictor of the conditions under which the rock developed. </em>

<em>2) Intrusive igneous rocks cool slowly from magma in the crust. They have a lot of crystals. Extrusive igneous rocks cool fast from lava near the surface. They are covered with tiny crystals.</em>

<em>3) Usually they will contain metal elements that oxidise easily. For example, the Igneous rocks on them Moon (the Maria or 'oceans') are darker in colour due to a higher percentage of iron.</em>

<em>4) The hue of igneous rocks is proportional to their density. Darker colored rocks have a higher density because they contain more material and iron. Light colored rocks have a lesser density because they contain less material and iron.</em>
<em>5) Magma is hot, molten rock under the earth's surface; lava is when magma reaches the earth's surface (it is then called lava).</em>
<em>6) The mineral grains with a pegmatitic texture are unusually big. The biggest ones are often more than 3 cm long. In intrusive rocks, this texture can be seen. The fact that they were particularly big did not imply that they cooled slowly.</em>
<em>7) Igneous rocks are classified according to their origin, texture and mineral composition. A igneous rock formed from lava that erupted on to earths surface.</em>

<em>~</em>

<em>ROR</em>

5 0

2 years ago

Lithium is a metal.

Zina [86]

Answer:

Explanation:

lithium: lithium is very soft, silvery metal. melting point is 180.54°C and boiling point is 1,335°C. it's density is 0.534 grams per cu.cm. oxygen: oxygen is colourless , odorless , tasteless gas

8 0

3 years ago

How many electrons will be in the valence of non- H atoms when they make covalent bonds?

NNADVOKAT [17]

Answer:

Please one time click here

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8 0

3 years ago

Which sentence is the best definition of a hypothesis?

Varvara68 [4.7K]

Answer:

d

Explanation:

its a proposed explanation based off limited evidence.

8 0

3 years ago

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