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statuscvo [17]
3 years ago
8

USE LETTERS FOR ANSWERS, NO NEED TO EXPLAIN

Chemistry
1 answer:
Deffense [45]3 years ago
6 0

Answer:

Ok:

Explanation:

6a) Hg + Zn(NO_3)_2\\

b) NR

c) Hg_{(l)} + Zn(NO_3)_2 {(aq)}=> NR

d) Welp, no reaction so i don't know.

7a) KI + Pb(NO_3)_2

b) PbI_2 + KNO_3

c) All are aqeuous except for PbI2 which is solid

d) 2KI _{(aq)}+ Pb(NO_3)_2_{(aq)} => PbI_2_{(s)} + 2KNO_3_{(aq)}

Check if that is ok or if my work has any issues :).

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Which term refers to the ability to do work? O energy O power force O motion
Burka [1]

Answer:

the correct answer in energy

Explanation:

3 0
4 years ago
Read 2 more answers
The formula weight of a compound is determined by adding up the individual weights of every _______ in that compound.
Jlenok [28]

Answer:

C. Atom

The formula weight is calculated by the sum( adding) of the atomic masses for every atom in the formula

3 0
3 years ago
The elements in Groups 1 and 2 get more reactive as you go down the group.
deff fn [24]

Answer:

Sodium and Magnesium

Explanation:

The elements in Groups 1 and 2 get more reactive as you go down the group.

This means that Sodium is more reactive than lithium and Magnesium is more reactive than beryllium.

On the periodic table, as you go down the group, the reactivity of an element increases. Especially with metals in group 1 and 2. Now Lithium is a metal of group 1, followed by Sodium, while Beryllium is a metal in group 2, followed by magnesium. That's how I picked the answers

4 0
3 years ago
Suppose you have been given the task of distilling a mixture of hexane + toluene. Pure hexane has a refractive index of 1.375 an
rosijanka [135]

Answer:

Mole fraction of hexane in your sample is 0,746

Explanation:

Based on the information you can write the following equations:

X + Y = 1 <em>(1)</em>

Where X is mole fraction of hecane and Y is mole fraction of toluene

Also, based on the assumption that the refractive index of the hexane + toluene mixture varies linearly with mole fraction you can write:

1,375X + 1497Y = 1406 <em>(2)</em>

<em></em>

Replacing (1) in (2):

1,375X + 1,497(1-X) = 1,406

1,375X - 1,497X + 1,497 = 1,406

-0,122X = -0,091

X = -0,091/-0,122

X = 0,746

Thus, the <em>mole fraction of hexane in your sample is 0,746</em>

Also you can know the mole fraction of toluene replacing this value in (1):

0,746 - Y = 1

Y = 1-0,746

Y = 0,254

I hope it helps!

4 0
4 years ago
The bonds S-S, O-H and Ca-Cl are, respectively, a) nonpolar covalent, polar covalent, ionic polar covalent, b)nonpolar covalent,
Brums [2.3K]

Answer:

nonpolar covalent, polar covalent, ionic

Explanation:

From the question ,

S - S Bond -

Both the atom are same , hence , making a non polar bond , because of no difference between the electronegativity of the atom ,

Hence , the S-S Bond is non polar covalent bond .

O-H bond -

The Oxygen atom is more electronegative than the hydrogen atom , so the bond is polar in nature .

And as the bond is formed by sharing ,

Therefore ,

O-H bond is polar covalent bond .

Ca-Cl bond -

Calcium is a metal , whereas , Chlorine is a non - metal , the bond is ionic in nature ,

Hence , Ca-Cl bond is  ionic  in nature .

7 0
3 years ago
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