What molecule is the ultimate source of hydrogen ions that are secreted into the gastric juice?

A 0.5922 g sample of a pure soluble chloride compound is dissolved in water, and all of the chloride ion is precipitated as AgCl

Elanso [62]

Answer: The mass percent chlorine in pure chloride compound is 56.31 %.

Explanation:

We are given:

Mass of AgCl precipitated = 1.3487 g

We know that:

Molar mass of AgCl = 143.32 g/mol

Molar mass of Chlorine atom = 35.45 g/mol

As, all the chlorine in the sample is precipitated to silver chloride. So, the mass of chlorine in silver chloride will be equal to the mass of chlorine present in the sample.

To calculate the mass of chlorine in given mass of AgCl, we apply unitary method:

In 143.32 g of silver chloride, mass of chlorine present is 35.45 g

So, in 1.3487 g of silver chloride, mass of chlorine present will be = $\frac{35.45g}{143.32g}\times 1.3487g=0.3335g$

To calculate the percentage composition of chlorine in pure chloride compound, we use the equation:

$\%\text{ composition of chlorine}=\frac{\text{Mass of chlorine}}{\text{Mass of pure chloride compound}}\times 100$

Mass of pure chloride compound = 0.5922 g

Mass of chlorine = 0.3335 g

Putting values in above equation, we get:

$\%\text{ composition of chlorine}=\frac{0.3335g}{0.5922g}\times 100=56.31\%$

Hence, the mass percent chlorine in pure chloride compound is 56.31 %.

6 0

4 years ago

Erwin Schrödinger developed the quantum model of the atom. What scientific knowledge was necessary for Schrödinger’s work?

madam [21]

The scientific knowledge that was necessary for Schrodinger’s work is the Bohr’s model. Unlike the Bohr model, the quantum model does not define the exact path of an electron. The electron is likely to be in a less dense area of cloud.

4 0

3 years ago

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Calculate the number of moles of Cu in 3.8×10213.8×1021 atoms of Cu.

rosijanka [135]

Answer:

6.3×10⁻³ moles of Cu

Explanation:

The relation is, that 1 mol of particles are contained by 6.02×10²³ particles.

This is Avogadro's number that explains that: one mole determines the number of fundamental units that are contained in a constant number but they do not depend on the type of material or the type of particle, and this quantity is 6.02 × 10²³

We can make a rule of three:

6.02×10²³ atoms are contained 1 in mol of Cu

Therefore, 3.8×10²¹ atoms will be contained in (3.8×10²¹ . 1) / NA = 6.3×10⁻³ moles

7 0

4 years ago

What is the biggest difference between an exothermic and endothermic process?

Nuetrik [128]

B.the amount of energy transferred.

5 0

3 years ago

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How much heat energy in megajoules is neede to convert 7kilograms of ice at negative 9 degrees to water at 0 degrees celsius

den301095 [7]

Heat_1: Get the ice to 0 degrees

Convert 7 kg to grams

7 kg [1000 grams / 1 kg] = 7000 grams

Heat needed to get the the ice from - 9 to 0

deltat = 0 - -9 = 9 degrees

m = 7000 grams

c = 2.1 joules/gram

Heat_1 = m*c*deltat

Heat_1 = 7000 * 2.1 * 9

Heat_1 = 132,300 joules

Heat_2: Melt the ice.

There is no temperature change. The formula is 333 j/gram

Formula: H = mass * constant

H = 7000 g * 333 J / gram

H = 2331000 joules

Heat_3: Total amount of Joules needed.

2331000 + 132300 = 2 463 300 joules

Convert to Megajoules

2 463 300 joules * 1 megajoule / 1000000 = 2.63 megajoules.

8 0

3 years ago