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dedylja [7]
3 years ago
10

28 Which statement describes one acid-base theory?(1) An acid is an H+ acceptor, and a base is an H+ donor.

Chemistry
1 answer:
sleet_krkn [62]3 years ago
7 0
An acids theory States that An Acid is an H+ donor, and a base is an H+ acceptor.
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A single replacement reaction is a reaction in which one element replaces a similar element within a compound. True or false?
AleksAgata [21]

Answer:

true

Explanation:

A single replacement reaction is a reaction that an element is displaced with another element in a compound

A+BC------AC+B

Mg+2HCl-------MgCl2+H2

8 0
4 years ago
Formula of a copper (II)sulfate hydrate lab
s344n2d4d5 [400]

Answer:

Weigh the empty crucible, and then weigh into it between 2 g and 3 g of hydrated copper(II) sulphate. Record all weighings accurate to the nearest 0.01 g.

Support the crucible securely in the pipe-clay triangle on the tripod over the Bunsen burner.

Heat the crucible and contents, gently at first, over a medium Bunsen flame, so that the water of crystallisation is driven off steadily. The blue colour of the hydrated compound should gradually fade to the greyish-white of anhydrous copper(II) sulfate. Avoid over-heating, which may cause further decomposition, and stop heating immediately if the colour starts to blacken. If over-heated, toxic or corrosive fumes may be evolved. A total heating time of about 10 minutes should be enough.

Allow the crucible and contents to cool. The tongs may be used to move the hot crucible from the hot pipe-clay triangle onto the heat resistant mat where it should cool more rapidly.

Re-weigh the crucible and contents once cold.

Calculation:

Calculate the molar masses of H2O and CuSO4 (Relative atomic masses: H=1, O=16, S=32, Cu=64)

Calculate the mass of water driven off, and the mass of anhydrous copper(II) sulfate formed in your experiment

Calculate the number of moles of anhydrous copper(II) sulfate formed

Calculate the number of moles of water driven off

Calculate how many moles of water would have been driven off if 1 mole of anhydrous copper(II) sulfate had been formed

Write down the formula for hydrated copper(II) sulfate.

#*#*SHOW FULLSCREEN*#*#

Explanation:

7 0
3 years ago
Please help with 3 and 4
mafiozo [28]
3. volume of gas because its changing because of the temperature
4. 67.6 breaths per minute
     65+73+67+71+62=338/5=67.6
                                           ^because there are five terms that we added
7 0
3 years ago
When the reaction shown is correctly balanced, the coefficients are HNO3 + KOH → KNO3 + H2O
GuDViN [60]
Coefficients are 1,1,1,1
4 0
3 years ago
A 52.0 g of Copper (specific heat=0.0923cal/gC) at 25.0C is warmed by the addition of 299 calories of energy. find the final tem
Leto [7]

Answer : The final temperature of the copper is, 87.29^oC

Solution :

Formula used :

Q=m\times c\times \Delta T=m\times c\times (T_{final}-T_{initial})

where,

Q = heat gained  = 299 cal

m = mass of copper = 52 g

c = specific heat of copper = 0.0923cal/g^oC      

\Delta T=\text{Change in temperature} 

T_{final} = final temperature = ?

T_{initial} = initial temperature = 25^oC

Now put all the given values in the above formula, we get the final temperature of copper.

299cal=52g\times 0.0923cal/g^oC\times (T_{final}-25^oC)

T_{final}=87.29^oC

Therefore, the final temperature of the copper is, 87.29^oC

4 0
3 years ago
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