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egoroff_w [7]
2 years ago
11

Which type of force does a magnet use to move a nail?

Chemistry
2 answers:
Katarina [22]2 years ago
7 0
It’s answer a Friction
galben [10]2 years ago
3 0

Answer:

C maybe

Explanation:

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Calculate the amount of CaO that would be produced when 35.5g of CaCO3 decompose on heating (Ca= 40, O = 16, C = 12, H = 1
DanielleElmas [232]

amount of CaO that would be produced when 35.5g of CaCO3 decompose on heating (Ca= 40, O = 16, C = 12, H = 1

just put the values to have answer

4 0
3 years ago
If 0.5 mole of zn is added to hydrochloric acid containing 0.6 mol of hcl, which reactant is in excess
ser-zykov [4K]
The balanced equation for the reaction is as follows;
Zn + 2HCl --> ZnCl₂ + H₂
stoichiometry of Zn to HCl is 1:2
limiting reagent is the reactant that is fully consumed in the reaction.
the amount of product formed depends on amount of limiting reactant present.
The excess reactant is when it has been provided in excess and only a fraction of the provided amount is used up in the reaction.
Amount of Zn moles - 0.5 mol
Amount of HCl moles - 0.6 mol
If Zn is provided, number of HCl moles reacted - 0.5 x 2 = 1.0 mol of HCl is required, but only 0.6 mol of HCl is provided.
HCl is therefore the limiting reactant, 
Number of Zn moles required - 0.6 mol /2 = 0.3 mol
But 0.5 mol are given, therefore 0.2 mol of Zn is in excess
6 0
3 years ago
Take 3 drops per 15 lbs. of body weight per day divided into 6 doses until the cooties are gone. how many drops do you take per
Luden [163]
You'd take about ten or eleven drops per day
3 0
3 years ago
You mix 12(g) H2 and 7.0(g) of O2 to form H2O. What is the theoretical yield of the reaction
deff fn [24]

Answer:

15.75g of H2O

Explanation:

Equation for reaction

2H2 + O2 -> 2H2O

From the equation, 2 moles of H2 react with 1 mole of O2 to produce 2 moles of H2O

Mole ratio of reactants is 2:1

1 mole of H2 contains 2g

x moles of H2 contains 12g

x=(12×1)/2 = 6

Therefore, 6 moles of H2 contains 12 g

1 mole of O2 contains 16g

x moles of O2 contains 7g

x=(1×7)/16

x=7/16=0.4375

Therefore, 0.4375 moles of O2 contains 7g

In solving for theoretical yield,

Firstly, determine the limiting reactant between all reactants involved in the reaction.

Considering the reactants in the reaction above, H2 and O2.

Mole ratio is 2:1

2 moles of H2 is needed to react with 1 mole of O2.

Then, 6 moles of H2 will react with x moles of O2

x=(6×1)/2=3

Therefore, 6 moles of H2 will react with 3 moles of O2

1 mole of O2 reacts with 2 moles of H2.

Then, 0.4375 mole of O2 will react with (0.4375×2)=0.875 moles of H2

But we are given 7g~0.4375 moles of O2 and, 12g~6 moles of H2.

From the stoichiometry, 6 moles of H2 needs 3 moles of O2.

But only 0.4375 moles of O2 is made available in the reaction.

Hence, O2 is the limiting reactant

Now, with the limiting reactant being O2, we can find the theoretical yield of the product.

Stoichiometric ratio between the limiting reactant and the product is

1:2

This means, 1 moles of O2 reacts to produce 2 moles of H2O

0.4375 moles of O2 will produce x moles of H2O

x=(2×0.4375)/1=0.875 moles.

Therefore, the theoretical yield of the product is 0.875 moles of H2O

or 15.75g of H2O

8 0
3 years ago
I need help please this is due today
jonny [76]
Option B is correct. Average speed can be found through the equation speed = distance/time. Applying this to each person using the data in the chart:

Dennis’ speed: 60 ft/0.5 secs = 120 ft per sec

Johnny’s speed: 60 ft/0.45 secs = 133.333 ft per sec

Travis’ speed: 60 ft/0.52 secs = 115.38 ft per sec

Michael’s speed: 60 ft/0.48 secs = 125 ft per sec

As you can see, Johnny’s speed is the fastest at 133.333 ft/sec.

8 0
3 years ago
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