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3 years ago

Which rule is used when writing the name of an ionic bass

2 answers:

8 0

The chemical name begins with Hydro The Chemical name ends with hydroxide and the ide ending is changed to ic also the polyatomic ate ending changed to ic

musickatia [10]3 years ago

6 0

Answer:

Name = name of metal + hydroxide.

Step-by-step explanation:

You name an ionic base according to the rule:

Name = name of metal + hydroxide

Thus,

NaOH = sodium hydroxide

Ca(OH)₂ = calcium hydroxide

Al(OH)₃ = aluminium hydroxide

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Which elements are rarely found in organic molecules

Marizza181 [45]

Answer:

Explanation:

6 0

3 years ago

The energy content of food is typically determined using a bomb calorimeter. Consider the combustion of a 0.22-g sample of butte

iren2701 [21]

Answer: The energy of combustion of butter is 31.5 kJ/g

Explanation:

The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.

$Q=C\times \Delta T$

Q = Heat absorbed by calorimeter =?

C = heat capacity of calorimeter = $2.67kJ/^0C$

Initial temperature of the calorimeter = $T_i$ = $23.5^0C$

Final temperature of the calorimeter = $T_f$ = $26.1^0C$

Change in temperature , $\Delta T=T_f-T_i=(26.1-23.5)^0C=2.6^0C$

Putting in the values, we get:

$Q=2.67kJ/^0C\times 2.6^0C=6.94kJ$

As heat absorbed by calorimeter is equal to heat released by combustion of butter

$Q=q$

Heat released by 0.22 g of butter = 6.94 kJ

Heat released by 1g of butter = $\frac{6.94}{0.22}\times 1=31.5kJ$

The energy of combustion of butter is 31.5 kJ/g

8 0

3 years ago

Some instruments differentiate individual quanta of electromagnetic radiation based on their energies. assume such an instrument

bulgar [2K]

Answer:

5.68×10¯¹⁰ m

Explanation:

From the question given above, the following data were obtained:

Energy (E) = 3.50×10¯¹⁶ J

Wavelength (λ) =?

Energy (E) and wavelength (λ) are related according to the following formula:

E = hv/λ

Where

E => is the energy

h => is the Planck's constant

v => is the velocity of electromagnetic radiation

λ => is the wavelength of the radiation.

With the above formula, we can obtain the wavelength of the radiation as follow:

Energy (E) = 3.50×10¯¹⁶ J

Planck's constant (h) = 6.63×10¯³⁴ Js

Velocity (v) = 3×10⁸ m/s

Wavelength (λ) =?

E = hv/λ

3.50×10¯¹⁶ = 6.63×10¯³⁴ × 3×10⁸ / λ

3.50×10¯¹⁶ = 1.989×10¯²⁵/ λ

Cross multiply

3.50×10¯¹⁶ × λ = 1.989×10¯²⁵

Divide both side by 3.50×10¯¹⁶

λ = 1.989×10¯²⁵ / 3.50×10¯¹⁶

λ = 5.68×10¯¹⁰ m

Thus, the wavelength of the radiation is

5.68×10¯¹⁰ m

7 0

3 years ago

Hydrogen gas is collected by downward displacement of water why

77julia77 [94]

Explanation:

Hydrogen is collected by downward displacement of water as it is less denser than water. Hence it comes out at the surface of water . It is insoluble in water so it does not dissolve in water. ... So, it is impossible to collect hydrogen gas in air medium.22-O

8 0

3 years ago

A student collects 285mL of nitrous oxides gas at 15.8°C and a pressure of 1.05atm. The next day, the same sample occupies a vol

Natalka [10]

Answer:

1.01 atm

Step-by-step explanation:

To solve this problem, we can use the Combined Gas Laws:

p₁V₁/T₁ = p₂V₂/T₂ Multiply each side by T₂

p₁V₁T₂ = p₂V₂ Divide each side by V₂

p₂ = p₁ × V₁/V₂ × T₂/T₁

Data:

p₁ = 1.05 atm; V₁ = 285 mL; T₁ = 15.8 °C

p₂ = ?; V₂ = 292 mL; T₂ = 11.2 °C

Calculations:

(a) Convert temperatures to kelvins

T₁ = (15.8+273.15) K = 288.95 K

T₂ = (11.2+273.15) K = 284.35 K

(b) Calculate the pressure

p₂ = 1.05 atm× (285/292) × (284.35/288.95)

= 1.05 atm × 0.9760 × 0.9840

= 1.01 atm

4 0

3 years ago