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DochEvi [55]
3 years ago
13

X square+4x+4 factories that ​

Chemistry
1 answer:
Maslowich3 years ago
4 0
Answer:
(x + 2)(x + 2)

Explanation:
You need 2 numbers that times to give 4 and add to give 4. So 2 and 2.
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Why are salt solutions not used to treat the roads during snow events when the temperature is below -15 degrees Celsius? *
Marta_Voda [28]

Answer:

i think thats c

Explanation:

3 0
3 years ago
Sum of all forces acting on object is it a forces, unbalanced forces , balanced forces, net forces
malfutka [58]

Answer: The answer is Net Forces.

Net force is the vector sum of forces acting on a particle or body.

Have a great day!

8 0
3 years ago
Read 2 more answers
Wood, Iron, Glass, Paper, Nickel Which substances show magnetic property?
____ [38]
If I am correct the answer would be iron and nickel.
4 0
3 years ago
iron is made by a reduction of iron oxide with carbon monoxide. Fe2O3+3CO-2Fe+3CO2. Calculate the mass of iron that can be forme
lyudmila [28]

Answer:

Mass = 88.12 g

Explanation:

Given data:

Mass of iron oxide = 126 g

Mass of iron formed = ?

Solution:

Chemical equation:

Fe₂O₃ + 3CO    →      2Fe + 3CO₂

Number of moles of iron oxide:

Number of moles = mass/molar mass

Number of moles = 126 g/ 159.69 g/mol

Number of moles = 0.789 mol

Now we will compare the moles of iron with iron oxide.

                      Fe₂O₃           :             Fe

                         1                 :               2

                   0.789              :            2/1×0.789 = 1.578 mol

Mass of iron:

Mass = number of moles ×molar mass

Mass = 1.578 mol × 55.84 g/mol

Mass = 88.12 g

4 0
2 years ago
A second reaction mixture was made up in the following way:
Leya [2.2K]

A. We can calculate the initial concentrations of each by the formula:

initial concentration ci = initial volume * initial concentration / total mixture volume

where,

total mixture volume = 10 mL + 20 mL + 10 mL + 10 mL = 50 mL

ci (acetone) = 10 mL * 4.0 M / 50 mL = 0.8 M

ci (H+) = 20 mL * 1.0 M / 50 mL = 0.4 M   (note: there is only 1 H+ per 1 HCl)

ci (I2) = 10 mL * 0.0050 M / 50 mL = 0.001 M

 

B. The rate of reaction is determined to be complete when all of I2 is consumed. This is signified by complete disappearance of I2 color in the solution. The rate therefore is:

rate of reaction = 0.001 M / 120 seconds

rate of reaction = 8.33 x 10^-6 M / s

6 0
3 years ago
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