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3 years ago

The element that corresponds to the electron configuration 1s22s22p63s23p64s13d5 is

Chemistry

1 answer:

vampirchik [111]3 years ago

5 0

Answer:

It's Chromium , I guess

Explanation:

chromium and Copper is some kind of special in

the complete electronic structure of an element

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Balancing equations

Bad White [126]

Make sure you numbers with variable are on one side and the numbers

7 0

4 years ago

A cold pack manufacturer has decided to change the chemical in their cold pack from ammonium nitrate to ammonium chloride, a saf

My name is Ann [436]

Answer: Tfinal = 7.1°C

Explanation:

heat released or absorbed = mass × specific heat capacity × change in temperature

q = m × cg × ΔT (eqn 1)

Note: ΔT = (Tfinal - Tinitial)

(q = ? ΔHsoln=25.7kJ/mole = 25700J/mole; mass of solution, m = 100 + 35g = 135g; cg = specific heat capacity of water = 4.18 J°C-1g-1; ΔT = ? masss of solute, NH4NO3 = 35g, molar mass of solute, NH4NO3 = 80g)

molar enthalpy of solution, ΔHsoln = heat absorbed or released ÷ moles of solute, n

ΔHsoln = q ÷ n

q = ΔHsoln × n

moles solute, n = mass solute (g) ÷ molar mass solute (g mol-1)

moles of solute, n = 35g/80g/mol = 0.4375 moles

q = 25700J/mol × 0.4375 mol = 11243.75J

From equation 1 above, ΔT = q / (m × cg) = 11243.75J / (135 × 4.18 J°C-1g-1) = 19.9°C

Since the reaction is endothermic, Tinitial > Tfinal, therefore, Tfinal = Tinitial - ΔT = 27 - 19.9 = 7.1°C

4 0

4 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

HCl + CaCO3 → CaCl2 + H2O + CO2 balanced equation Pls Help i will give 100 Points!!!

vagabundo [1.1K]

Answer:

i think its CaCO3 + 2HCl → CaCl2 + H2O + CO2

Explanation:

3 0

2 years ago

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what property of the materials used in computer chips makes them useful as switches that turn electricity on and off

Leya [2.2K]

Answer: Metalloids are used in computer chips because they often conduct electricity under certain conditions and stop the flow of electricity under other conditions. This characteristic enables computer chips to switch electric current on and off.

Explanation:

5 0

3 years ago