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mart [117]
3 years ago
15

Na+ leaks through neuron membranes faster than k+ because of the properties of the non-gated leak channels. na+ leaks through ne

uron membranes faster than k+ because of the properties of the non-gated leak channels.
a. True

b. False
Chemistry
1 answer:
Pavlova-9 [17]3 years ago
5 0

Answer: b. False

K+ ions move faster than the Na+ ions through the neuron membranes.

The concentration of Sodium ions outside the cell is very high. The concentration of Potassium ions inside the cells is very high. Leakage channels thus allow sodium ions to move inside the cells and pumps out the Potassium from the cells.

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How many grams of sodium chromate, Na2CrO4, are needed to react completely with
JulsSmile [24]

Answer:

We need 27.0 grams of Na2CrO4 to react with 56.7 grams of AgNO3

Explanation:

Step 1: data given

Mass of silver nitrate AgNO3 = 56.7 grams

Molar mass AgNO3 = 169.87 g/mol

Molar mass of Na2CrO4 = 161.97 g/mol

Step 2: The balanced equation

2AgNO3 + Na2CrO4 → Ag2CrO4 + 2NaNO3

Step 3: Calculate moles AgNO3

Moles AgNO3 = mass AgNO3 / molar mass AgNO3

Moles AgNO3 = 56.7 grams / 169.87 g/mol

Moles AgNO3 = 0.334 moles

Step 4: Calculate moles Na2CrO4 moles needed

For 2 moles AgNO3 we need 1 mol Na2CrO4 to produce 1 mol Ag2CrO4 and 2 moles NaNO3

For 0.334 moles AgNO3 we need 0.334 / 2 = 0.167 moles Na2CrO4

Step 5: Calculate mass Na2CrO4

Mass Na2CrO4 = 0.167 moles * 161.97 g/mol

Mass Na2CrO4 = 27.0 grams

We need 27.0 grams of Na2CrO4 to react with 56.7 grams of AgNO3

8 0
3 years ago
Why are the optimum conditions for the Haber process a temperature of 450°C and pressure of 200 atmospheres?
Novay_Z [31]

Answer:

See explanation.

Explanation:

Hello,

Haber process is defined as the widely acknowledged productive process of ammonia by the reaction:

N_2(g)+3H_2(g)\rightleftharpoons 2NH_3(g)

Which is carried out in gaseous phase. Thus, by means of the Le Chatelier's principle, it is possible to know that its standard enthalpy of reaction is -45.90 kJ/mol (NIST webbook) for which it is an exothermic chemical reaction, for that reason less ammonia will be produced at high temperature, nonetheless, the temperature should not be too low since the reaction rate significantly decrease, therefore, the optimum found temperature is 450 °C.

Moreover, since there are more moles (3+1=4) at the reactants and less moles at the products (2), increasing the pressure of the reaction increases the yield of ammonia, nonetheless, higher pressures involve the purchasing of more expensive equipment to withstand the high-pressures, for that reason, the best found pressure has been set as 200 atm.

Best regards.

8 0
4 years ago
Read 2 more answers
What are the chemical symbols for the elements calcium, carbon, and chlorine respectively? es
laiz [17]
The answer is letter c
7 0
3 years ago
Al (s) + O2 (g)→ Al2O3 (s) what type of chemical reaction is it
Serhud [2]

Explanation:

Correct option is

D

3

The unbalanced chemical reaction is Al(s)+O

2

(g)→Al

2

O

3

(s)

Balance Al atoms by adding 2 to Al on LHS

2Al(s)+O

2

(g)→Al

2

O

3

(s)

Balance O atoms by adding

2

3

to O

2

on LHS

2Al(s)+

2

3

O

2

(g)→Al

2

O

3

(s)

Multiply the whole equation with 2.

4Al(s)+3O

2

(g)→2Al

2

O

3

(s)

This is the balanced chemical equation. The coefficient of O

2

is 3.

6 0
3 years ago
What is the difference between quantative and qualitative analysis​
AlexFokin [52]

Answer:

Quantitative data can be counted, measured, and expressed using numbers.  Qualitative data is descriptive and conceptual.  Qualitative data can be categorized based on traits and characteristics.

Explanation:

Quantitative analysis involves looking at the hard data, the actual numbers. Qualitative analysis is less tangible. It concerns subjective characteristics and opinions – things that cannot be expressed as a number.

3 0
3 years ago
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