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3 years ago

The formula H2O2 is an example of *

Chemistry

1 answer:

saveliy_v [14]3 years ago

8 0

Answer: Molecular formula

Explanation:

Molecular formula is the chemical formula which depicts the actual number of atoms of each element present in the compound.

Empirical formula is the simplest chemical formula which depicts the whole number of atoms of each element present in the compound.

Ionic formula is the simplest chemical formula which depicts the whole number of atoms of each element present in an ionic compound.

Molecular formula of hydrogen peroxide is $H_2O_2$ . Empirical formula of hydrogen peroxide is OH.

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A 125G sample of water was heated to 100.0°C and then I borrow platinum 20.0°C is dropped into the beaker the temperature of the

Sophie [7]

Answer:

mass of platinum = 2526.12 g

Explanation:

Given data:

Mass of water = 125 g

Initial temperature of water= 100.0°C

Initial temperature of Pt = 20.0°C

Final temperature = 235°C

Specific heat of Pt = 0.13 j/g°C

Specific heat of water = 4.184 j/g°C

Mass of platinum = ?

Solution:

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = T2 - T1

Q(w) = Q(Pt)

m.c. (T2 - T1) = m.c. (T2 - T1)

125 g × 4.184 j/g°C × (235°C - 100.0°C) = m × 0.13 j/g°C × (235°C - 20°C)

125 g × 4.184 j/g°C × 135°C = m × 0.13 j/g°C × 215°C

70605 j = m×27.95 j/g

m = 70605 j /27.95 j/g

m = 2526.12 g

5 0

4 years ago

An exothermic reaction occurs spontaneously ,why?

Delvig [45]

Answer:

See below

Step-by-step explanation:

An exothermic reaction tends to occur spontaneously because the products are more stable than the reactants.

Nature tries to get to the lowest energy state.

4 0

3 years ago

Question 1 (1 point)

lilavasa [31]

Answer:

I believe the answer is C. Stopping an object from moving

4 0

3 years ago

Small quantities of hydrogen gas can be prepared in the laboratory by the addition of aqueous hydrochloric acid to metallic zinc

Alexxx [7]

Explanation:

The given data is as follows.

Pressure of moist hydrogen gas = 1.018 atm

Pressure of water vapor = $32 torr \times \frac{1 atm}{760 torr}$

= 0.0421 atm

Formula to calculate the pressure of dry hydrogen gas is as follows.

Pressure of $H_{2}$ gas = $P_{moist H_{2}} - P_{H_{2}O}$

Now, putting the given values into the above formula as follows.

Pressure of $H_{2}$ gas = $P_{moist H_{2}} - P_{H_{2}O}$

= 1.018 atm - 0.0421 atm

= 0.976 atm

Therefore, we can conclude that partial pressure of hydrogen gas in the given sample is 0.976 atm.

8 0

3 years ago

Read 2 more answers

4. Locate the data and observations collected in your lab Juide. What are the key results? How would

GalinKa [24]

Answer: In a lab guide, the key results are those that support my working hypotheses or serve to reject these assumptions. Moreover, the key results may also be other discoveries that are important to understand the processes and/or mechanisms investigated in the experiment.

1 answer

Explanation:

3 0

3 years ago