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Olenka [21]
3 years ago
11

Balance the equations. Zn+ HCl → ZnCl2 +

Chemistry
1 answer:
motikmotik3 years ago
7 0

Answer:

Zn + 2HCl → ZnCl2 + H2

Explanation:

Zn + HCl → ZnCl2 +

The complete equation is given below:

Zn+ HCl → ZnCl2 + H2

Now we can balance the equation by doing the following:

There are 2 atoms of Cl and 2 atoms of H on the left. This can be balanced by putting 2 in front of HCl as shown below:

Zn + 2HCl → ZnCl2 + H2

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What kinds of elements form an ionic bond?
Vanyuwa [196]
Ionic bonds usually occur between metal and nonmetal ions. For example, sodium (Na), a metal, and chloride (Cl), a nonmetal, form an ionic bond to make NaCl. In a covalent bond, the atoms bond by sharing electrons. Covalent bonds usually occur between nonmetals.
5 0
3 years ago
Specify whether CF4 is polar. Match the correct word in the left column to the blanks in the sentence on the right.
zavuch27 [327]

Answer:

CF4 is non polar

polar, no net, nonpolar

Explanation:

The overall polarity of a molecule depends on the presence of polar bonds within the molecule and the orientation of the polar bonds to produce an overall dipole moment. This implies that the presence of polar bonds in a molecule does not automatically imply that such molecule is polar or will display on overall dipole moment. The orientation of the individual dipoles affects the overall dipole moment of the molecule.

A polar molecule results from an unequal/unsymmetrical sharing of valence electrons. While there may be unequal sharing of electrons in the individual bonds, in a nonpolar molecule like CF4 these bonds are evenly distributed and cancel out. There is no net dipole and the CF4 is non-polar. Hence the order of words chosen in the answer to fill in the blanks.

5 0
3 years ago
Why is there so little evidence of the Period of Heavy Bombardment on Earth?
OverLord2011 [107]

C. Weathering, plate movements and volcanoes destroyed many of

the craters

Explanation:

The earth is a dynamic planet. Both external and internal processes sculpt and shapes the surface and interior of the earth primarily from the energy from the sun and the primordial heat accumulated during the formation of the earth.

  • The period of heavy bombardment of the earth resulted in the creation of craters and other impact features on the earth surface.
  • As earth evolved, the process of weathering which is one of the tools of denudation caused the lowering and changing of the earth. Through this process sedimentary rocks were formed.
  • The movement of the earth through plate tectonics also greatly shaped the earth. New materials from the interior were brought to the surface. Some existing parts were destroyed at subduction zones. Some also became elevated.
  • Volcanism also brought new materials to the surface and this changed the terrain.

Learn more:

Asteroid brainly.com/question/12785992

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#learnwithBrainly

6 0
3 years ago
Read 2 more answers
A compound contains only carbon, hydrogen, and oxygen. combustion of 11.75 mg of the compound yields 17.61 mg co2 and 4.81 mg h2
Ymorist [56]

Number of moles is defined as the ratio of given  mass in g to the molar mass.

First, convert the given mass of carbon dioxide in mg to g:

1 mg = 0.001 g

17.61 mg = 0.01761 g

Number of moles of carbon dioxide = \frac{0.01761 g}{44.01 g/mol}

= 0.0004001 mol

Mass of carbon  = number of moles of carbon dioxide \times molar mass of carbon

= 0.0004001 mol\times 12.011 g/mol

= 0.004806 g

Number of moles of water= \frac{0.00481 g}{18 g/mol}

= 2.672\times 10^{-4}

Since, water contains two hydrogen atoms. Thus,

Moles of hydrogen = 2\times 2.672\times 10^{-4}

= 5.34\times 10^{-4}

Mass of hydrogen = 5.34\times 10^{-4}\times \times 1.008 g/mol

= 5.34\times 10^{-4} g

Mass of oxygen = 0.001175-(5.38\times 10^{-4}g+0.004806 g)

= 0.006405 g

Number of moles of oxygen = \frac{0.006405 g}{15.999 g/mol}

= 0.000400

Now,

C_{0.0004001}  H_{0.000534}  O_{0.000400}

Divide the smallest number to get the whole number,

C_{\frac{0.0004001}{0.000400}}  H_{\frac{0.000534}{0.000400}}  O_{\frac{0.000400}{0.000400}}

we get,

C_{1}  H_{1.33}  O_{1}

Now, multiply all the subscript by 3 to get the whole number,

C_{3}     H_{4}      O_{3}   (empirical fomula)

Molar mass of the compound  =3\times 12.011 g/mol+4\times 1.008 g/mol+3\times 15.999 g/mol

= 88.062 g/mol

Divide given molar mass of the compound with the molar mass of the compound.

=\frac{176.1 g/mol}{88.062 g/mol}

= 1.999\simeq 2

Thus, multiply the subscripts of empirical formula by 2 to get the molecular formula, we get:

C_{6}H_{8}O_{6}

Hence, empirical formula is C_{3}H_{4}O_{3} and molecular formula is C_{6}H_{8}O_{6}



8 0
3 years ago
Rhia is using the above equation to investigate the carbon footprint, ccc, in kilograms of carbon dioxide (co_2)(co 2 ​ )left pa
Drupady [299]

Answer: -

0.2 Kg

Explanation: -

The equation used by Rhia for the carbon footprint measurement is

C = 0.2 B + 0.1 S

where S miles are by subway, B miles by bus and C is Kg of carbon dioxide.

From the equation we see the coefficient of B is 0.2.

Thus 0.2 Kg of carbon dioxide per mile the bus portion contributes to Rhia's carbon footprint.

8 0
3 years ago
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