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3 years ago

Why do different materials have similar properties

Chemistry

2 answers:

NeTakaya3 years ago

8 0

There’s a difference in the number of protons and neutrons in atoms for many of the different properties of elements

Deffense [45]3 years ago

7 0

Answer:

The difference in the number of protons and neutrons in atoms account for many of the different properties of elements.

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What do organisms have based on their functions?

mote1985 [20]

Unicellular organisms, cells perform all the basic actions and functions required for living like nutrition, respiration, reproduction etc.

In multicellular organisms, cells divide their tasks on the basis of "DIVISION OF LABOUR" to specialize in certain functions besides respiration etc. Like conduction in neurons, excitation in muscles, RBC production by bone marrow etc.

6 0

3 years ago

When solid Ni metal is put into an aqueous solution of Pb(NO3)2, solid Pb metal and a solution of Ni(NO3)2 result. Write the net

Sonja [21]

Answer:

$Pb^{2+}(aq)+Ni(s)\rightarrow Ni^{2+}(aq)+Pb(s)$

Explanation:

Hello there!

In this case, according to the given information, it turns out firstly necessary for us to write the complete molecular equation as shown below:

$Pb(NO_3)_2(aq)+Ni(s)\rightarrow Ni(NO_3)_2(aq)+Pb(s)$

Now, we can separate the nitrates in ions as they are aqueous to obtain:

$Pb^{2+}(aq)+2(NO_3)^-(aq)+Ni(s)\rightarrow Ni^{2+}(aq)+2(NO_3)^-(aq)+Pb(s)$

And then, we cancel out the nitrate ions as the spectator ones, for us to obtain the net ionic equation:

$Pb^{2+}(aq)+Ni(s)\rightarrow Ni^{2+}(aq)+Pb(s)$

Best regards!

6 0

3 years ago

According to this chemical equation which molecules represeny the products 4fe+3O->2fe2O3 A iron B iron and oxygen C iron oxi

svet-max [94.6K]

Answer: C. iron oxide

Explanation:

In a chemical reaction , the reactants are written on the left hand side followed by a rightarrow and then products are given on the right side of the arrow.

In the given chemical equation :

$4Fe+3O_2\rightarrow 2Fe_2O_3$

Reactants are iron (Fe) and oxygen $(O_2)$ and product is iron oxide $(Fe_2O_3)$ .

8 0

3 years ago

4. What is the percent by mass of tungsten in the calcium tungstate compound CaWO3, commonly

MA_775_DIABLO [31]

Answer: 67.4%

Explanation:

Ca 40.8

W. 183.8

O. 16.00

CaWO3 272.6

W = 183.8/272.6 = 0.674

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3 years ago

In the chemical equation H, O2 (aq) --> H2O(1) + O2(g), the O2 is a

kogti [31]

Answer:

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3 years ago