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grigory [225]
3 years ago
15

Suppose you want to find out which dog food your dog likes best. Write about the experiment you would design. What variables do

you need to control? How would you avoid experimental bias? Write a scientific hypothesis.
Answer all these questions. Thanks!
Chemistry
1 answer:
denis-greek [22]3 years ago
3 0
By giving the dog 2 or more different dog foods and seeing what one he eats the must of and the variables u control is how much you give the dog and the hypothesis is if I give the dog two or more different kinds of dog food than we will see what one he/she like the most
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Please help it’s due today I will give brainliest
Thepotemich [5.8K]

1st and 4th options are suitable answers, as these 2 changes are not exactly physical changes as it cant return back to original form and as well as its not cooling, so I feel its 1st and 4th options

7 0
3 years ago
Pleaaaaase helppppppppppppp ASAP
laiz [17]

Answer:

Explanation:

a) The forward reaction is exothermic, hence when temperature is increased the equilibrium shift towards the reactants side to get rid of the excess energy. This will mean that more reactants are produced decreasing yield

b) There are a fewer number of moles of gas on the right side compared to the left side (Just count the coefficients before each compound) so a higher pressure will mean that the equilibrium will shift towards the products side in order to decrease the pressure. This will mean that more products are formed increasing yield

c) When something is powdered it's surface area to volume ratio increases. A higher surface area means that the particles around it have more area to work on so the frequency of collisions will increase increasing the rate of reaction. This is why iron is powdered.

4 0
3 years ago
Which of the following combinations would you need an electroplating apparatus to coat the first metal onto the second metal
ivolga24 [154]

Answer:

nickel onto iron.

7 0
3 years ago
Read 2 more answers
7.26 of a hydrate, Cu(NO3)2.xH2O, formed 2.4 g copper(II) oxide.
goldfiish [28.3K]

Number of moles= mass/ molar mass

Or n=m/MM

n = number of moles

m = mass

MM = molar mass

1) n CuO = 2.4g / 79.54g/mol = 0.03 mol CuO

2) n Cu(NO3)2.xH2O = 7.26 g / 205.6 = 0.035 moles of Cu(NO3)2.xH2O

3) 205.6 g

Cu = 63.5 g

N = 14g

O =16g

H= 1 g

63.5+ (14+(16*3))*2+1*2+16 =205.6 g

4) yes is 188g

5) I don’t know, I assume was 1

6 0
3 years ago
Read 2 more answers
The constant collisions of the moving particles of a gas with the walls of the container produce the characteristic called
timurjin [86]

Answer:

Pressure

Explanation:

Apply the definition of pressure to this problem.

8 0
2 years ago
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