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Lelu [443]
3 years ago
8

What does FE stand for in the Periodic Table of Elements?

Chemistry
2 answers:
sveticcg [70]3 years ago
6 0
It stabds for Iron.
Anna [14]3 years ago
4 0
FE in the periodic table, stands for iron
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Where does most of our heat come from?
Tpy6a [65]

Answer:

the cells in your body

Explanation:

Most people that i have asked this similar question to, have said the sun. It's not the sun because the sun disappears at night. Your body produces heat because your cells are burning up energy.

3 0
2 years ago
A student determines the aluminum content of a solution by first precipitating it as aluminum hydroxide, and then decomposing th
Vladimir [108]

Answer: The student should obtain <u>1.103 g of aluminum oxide </u>

Explanation:

  • First we write down the equations that represent the aluminum hydroxide precipitation  from the reaction between the aluminum nitrate and the sodium hydroxide:

Al(NO3)3 + 3NaOH → 3NaNO3 + Al(OH)3

Now,  the equation that represents the decomposition of the hydroxide to aluminum oxide by heating it.

2Al(OH)3 → Al2O3 + 3H2O

  • Second, we gather the information what we are going to use in our calculations.

Volumen of  Al(NO3)3 = 40mL

Molar concentration of Al(NO3)3 =  0.541M

Molecular Weight Al2O3 = 101.96 g/mol

  • Third, we start using the molar concentration of the aluminum nitrate and volume used to find out the total amount of moles that are reacting

\frac{0.541moles Al(NO3)3}{1L} x\frac{1L}{1000mL} x 40mL Al(NO3)3 =  0.022moles Al(NO3)3

then we use the molar coefficients from the  equations to discover the amount of Al2O3  moles produced

0.022moles Al(NO3)3 x \frac{1mol Al(OH)3}{1mol Al(NO3)3} X\frac{1mol Al2O3}{2molAl(OH)3} = 0.011 moles Al2O3

finally, we use the molecular weight of the Al2O3  to calculate the final mass produced.

0.011moles Al2O3 x \frac{101.96g Al2O3}{1mol Al2O3} = 1.103g Al2O3

4 0
4 years ago
How many protons electrons and neutrons respectively does 29 CS have
irakobra [83]

55 \; \text{e}^{-}, 55 \; \text{p}^{+}, and 74 \; \text{n}^{0}- in case cesium-129 is what you were referring to.

Cesium has atomic number 55 as seen on a modern periodic table. A cesium atom nucleus would thus contain an equal number of protons; in addition to that, a <em>neutral</em> atom of cesium would contain the same number of electrons in its electron cloud.

For a particular isotope,

\text{Mass number} = \text{Number of protons per nuclei} + \text{Number of Neutrons per nuclei}.

This isotope of cesium has a mass number of 129 and contains 55 protons in each atomic nucleus. One cesium nuclei would therefore contain 129 - 55 = 74 neutrons.

8 0
3 years ago
Word Bank: Mixtures, Compounds, Matter, Homogeneous, Element, Substance, Heterogeneous
docker41 [41]

Answer:

<em>1</em><em>.</em><em> </em><em>Element</em>

<em>2</em><em>.</em><em> </em><em>Heterogeneous</em><em> mixture</em>

<em>3</em><em>.</em><em> </em><em> </em><em>Compound</em>

<em>4</em><em>.</em><em> </em><em>Mixture</em><em> </em><em>or </em><em>Substances</em>

<em>5</em><em>.</em><em> </em><em>Elements</em>

<em>6</em><em>.</em><em> </em><em>Homogeneous</em><em> mixture</em>

4 0
3 years ago
What is the function of control rods in a nuclear reactor?
trapecia [35]
The answer is
C. Control reaction rate
hope it helps :)

4 0
3 years ago
Read 2 more answers
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