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Semmy [17]
3 years ago
15

Identify the double displacement reaction.

Mathematics
1 answer:
Anit [1.1K]3 years ago
3 0
A double replacement reaction occurs when the ionic parts of two ionic compounds are exchanged. 

Reaction 1 results in a product which is a single compound. No ionic parts are exchanged. 

Reaction 3 results in one compound being separated into its elemental parts. No ionic parts are exchanged. 

Reaction 4 has two reactants, but Pb is an element and not an ionic compound. No ionic parts are exchanged. 

Hence, the answer is Reaction 2. Both NaBr and Ca(OH)2 are ionic compounds. Br - is the anion in NaBr, and (OH)2 is also an anion. Ionic parts are exchanged. 
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Please help asap!<br><br><br> thank you
Cerrena [4.2K]

Answer:

a

Step-by-step explanation:

4 0
3 years ago
The wholesale price for a desk is $102. A certain furniture store marks up the wholesale price by 25%. Find the price of the des
denpristay [2]

Answer:

I guess $197.06

Step-by-step explanation:

8 0
2 years ago
in the bag, there are certain number of toy- blocks with alphabets A,B,C and D written on them. The ratio of blocks A:B:C:D is 4
Svet_ta [14]
Given, the ratio of blocks A, B, C,D are in the ratio 4:7:3:1

Let us consider the common ratio to be ‘x’.

So, toy blocks with alphabet A is 4x and

toy blocks with alphabet B is 7x and

toy blocks with alphabet C is 3x and

toy blocks with alphabet D is x


Again, the number of ‘A’ blocks is 50 more than the number of ‘C’ blocks.

As no. of ‘A’ and ‘C’ blocks are 4x and 3x respectively.

So,

4x=50 + 3x

x=50

Thus, the number of ‘B’ blocks is 7x = 7(50) = 350

350 is the required number.
7 0
3 years ago
Read 2 more answers
Please can u give me this answer ☹️
Jlenok [28]

Answer:

the second one

Step-by-step explanation:

Hello There!

The area of a triangle can be found using this formula

A = \frac{1}{2} (a+b)h

where a and b = bases and h = height

The trapezoid shown has the following dimensions

top base = 9cm

bottom base = 14 cm

height = 12 cm

slant height = 13 cm

using this information, we plug in the values into the formula

So A = \frac{1}{2} (9+14)12

the equation we created matches the 2nd equation therefore the second one is your answer

7 0
3 years ago
Read 2 more answers
Evaluate if a=2 and b=8 6+7b-3a
VladimirAG [237]

Answer:

56

Step-by-step explanation:

6+7b-3a

Substitute:

6+7(8)-3(2)

Solve:

6+56-6

Simplify:

6+50

=56

7 0
3 years ago
Read 2 more answers
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