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4 years ago

What is the oxidation state of nitrogen in the compound nh4br

Chemistry

2 answers:

blsea [12.9K]4 years ago

4 0

Answer:

what was the answer?

Explanation:

it wont let me ask the question, only answer it sorry :(

monitta4 years ago

3 0

A) –1 B) +2 C) +6 D) +4 3.

MARK ME BRAINLIEST!!!!!!!

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If you obtained 2.50 moles of CuSO4 from the reaction of CuO and H2SO4, but the theoretical yield was 3.19 moles, what was the p

IceJOKER [234]

Answer:

78.4%

Explanation:

Just as context, write the chemical equation and the mole ratios

1) Balanced chemical equation:

CuO (s) + H₂SO₄ (aq) → CuSO₄ (aq) + H₂O (l)

2) Therotetical (stoichiometric) mole ratios:

1 mol CuO : 1 mol H₂SO₄ : 1 mol CuSO₄ : 1 mol H₂O

You can calculate the percent yield from the amount of CuSO₄ obtained and the theoretical yield

3) Percent yield

Definition:

Percent yield = (actual yield / theoretical yield)×100

Theoretical yiedl (given): 3.19 moles CuSO₄

Actual yield (given): 2.50 moles CuSO₄

Calcualtion:

Substitute the values in the formula:

Percent yield = (2.50 moles CuSO₄ / 3.19 moles CuSO₄)×100 = 78.4%

6 0

4 years ago

A sample of a gas in a rigid cylinder with a movable piston has a volume of 11.2 liters at STP. What is the volume of this gas a

posledela

Given that the volume of cylinder at STP = 11.2 L

Standard temperature = 273 K

Standard pressure = 1 atm

Calculating the volume of gas at 202.6 kPa and 300. K:

Applying the combined gas law,

$\frac{P_{1}V_{1}}{T_{1}} =\frac{P_{2}V_{2}}{T_{2}}$

$P_{1} =1 atm$

$V_{1}=11.2 L$

$T_{1}=273K$

$P_{2}$ = $202.6 kPa*\frac{1 atm}{101.325 kPa} =2 atm$

$V_{2}= ?$

$T_{2}=300. K$

Plugging in the values and calculating final volume:

$\frac{(1atm)(11.2L)}{(273 K)} =\frac{(2atm)(V_{2})}{(300K)}$

$V_{2}=6.15 L$

Therefore the correct answer will be, b) 6.15 L

6 0

3 years ago

An isotope contains 47 protons, 47 electrons, and 60 neutrons

barxatty [35]

Answer:

Explanation:

becasue

4 0

2 years ago

At rest, a neuron has a lower concentration of sodium than the surrounding fluid. The neuron also has a higher concentration of

pshichka [43]

Answer:

a. Remaining at rest requires the use of ATP.

Explanation:

The resting membrane potential is maintained by the sodium-potassium pump. The sodium potassium pump does this by actively pumping sodium ions out of the cell and potassium ions inside the cell in a ratio of 3:2. This movement of ions by the sodium-potassium pump is against their concentration gradient. In a neuron at rest, there are more sodium ions outside the cell than there are inside the cell. Also, there are are more potassium ions inside the cell than there are outside the cell. However, there are ion channels through which these ions enter and leave the cell. Sodium ion channels allow sodium to enter the cell following its concentration gradient, whereas, potassium ion channels allow potassium to leave the cell following its concentration gradient. However, more potassium ions leave the cell than do sodium ions enter the cell because of the higher permeability of the cell to potassium ions.

In order to maintain the resting membrane potential, the sodium potassium pump powered by the hydrolysis of an ATP molecules pumps sodium ions out of the cell and potassium ions into the cell.

Therefore, the correct option is A, as ATP is needed by the sodium-potassium pump in order to maintain the resting membrane potential.

6 0

3 years ago

Identify which trends in the diagrams below describe

mr_godi [17]

Explanation:

the atmoc radius across the period

<h2>Atom radius as you move form left to right the atomic in the period table atomic radius decrease do to decrease the number of shell and it causes the Electron closed to nucleus. and also cause to decrease the inozation engey, electronegative andelectro affinity....... in the group the atomic radius increase as you move down the group do to increase number of shell because the Electron are far-away to the nuclear and it causes the small amount of energy to ionization so that the ionization engey , electronaffity and electronegative are increase </h2>

5 0

3 years ago