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pochemuha
3 years ago
14

HELP ASAP ILL GIVE YOU 40 POINTS IF YOUR CORRECT!

Chemistry
2 answers:
disa [49]3 years ago
8 0

Answer:

Figure  7.4.1 : Balancing Equations. You cannot change subscripts in a chemical formula to balance a chemical equation; you can change only the coefficients. Changing subscripts changes the ratios of atoms in the molecule and the resulting chemical properties. For example, water (H2O) and hydrogen peroxide (H2O2) are chemically distinct substances. H2O2 decomposes to H2O and O2 gas when it comes in contact with the metal platinum, whereas no such reaction occurs between water and platinum. The subscripts are part of the formulas and once the formulas for the reactants and products are determined, the subscripts may not be changed. The coefficients indicate the number of each substance involved in the reaction and may be changed in order to balance the equation. The equation above indicates that one mole of solid copper is reacting with two moles of aqueous silver nitrate to produce one mole of aqueous copper (II) nitrate and two atoms of solid silver.

Explanation:

DiKsa [7]3 years ago
4 0

Answer: 6

Explanation:

Element                Quantity

Copper                        1

Silver                           2

Nitrogen                      1

Oxygen                        6

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What is the mass number of an isotope
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<span>The mass number given on the periodic table is a weighted average of all the isotopes. You get the exact mass of an isotope by adding the protons(atomic number) to the number of neutrons in that isotope.</span>
8 0
3 years ago
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You shine a flashlight into a glass of apple juice. Some of the light bounces off the liquid. Some of it passes through it. Whic
Vilka [71]

Answer:

2. Translucent

4. Reflection

Explanation:

The terms translucent describes the nature of the juice and reflection perfectly fits the property of the light.

A translucent substance is one that partially allows light to pass through it. Since it is said that some of the light bounced back and some passed through, this is translucent.

Also, the light bouncing back is an indicator of reflection. Reflection is a property of light where it bounces back a surface.

7 0
3 years ago
Identify the type of interactions involved in each of the following processes taking place during the dissolution of sodium chlo
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Answer:

I) Solvent-solvent interactions involves B & F.

B. Interactions involving dipole-dipole attractions.

F. Interactions between the water molecules.

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A. Interactions between the ions of sodium chloride.

D. Interactions involving ion-ion attractions.

III. Solute-solvent interactions involves G & C

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5 0
4 years ago
Calcium oxalate (CaC2O4) has a Ksp value of 2.3 × 10–9 at 25°C. Calculate the molar solubility of Ca2+ and C2O42– in one liter o
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Ksp is the equilibrium constant of solubility of a solid in a solution.

The solid is CaC2O4.

The dissolved ions are Ca2+ and C2O4 2-

The equation of the equilibrium is
CaC_{2}O_{4} = Ca^{2+} +  {C_{2}O_{4}}^{2-}

Then Ksp = [Ca 2+][C2O4 2-]

Where the [ ] indicates molar concentration

The chemical equation for this equilibrium implies [Ca 2+] = [C2O4 2-]. Name X this quantity

Ksp = x^2 ==> x = square root of Ksp

x = sqrt(2.3 * 10^ -9) = 4.8 * 10^ -5

Which is the second option.


7 0
4 years ago
Need help asap
zzz [600]
Question 4 is C. 13 I believe
5 0
4 years ago
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