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3 years ago

I in the blanks.The solid substance left on the filter paper is called

Chemistry

1 answer:

horsena [70]3 years ago

3 0

Explanation:

the solid substance which left on the filter paper is called Residue

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Which of these solutes raises the boiling point of water the most?

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(E) ionic aluminum fluoride (AlF3)

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2 years ago

Answer the following questions based on the reaction below: NaOH(aq) + KHP(s) --> NaKP(aq)+H2O(I)

Natali [406]

Answer:

a) 1.44g

b) 77.3%

Explanation:

1. Chemical balanced equation (given)

$NaOH(aq)+ KHP(s)\rightarrow NaKP(aq)+H_2O(l)$

2. Mole ratio

$1molNaOH(aq):1molKHP(s)$

This is, 1 mol of NaOH will reacts with 1 mol of KHP.

3. Find the number of moles in 72.14 mL of the base

$Molarity=\text{number of moles of solute}/\text{volume of solution in liters}$

$\text{Volume of solution}=72.14mL=0.07214liters$

$\text{Number of moles of NaOH}=0.0978M\times 0.07214liter=0.007055mol$

4. Find the number of grams of KHP that reacted

The number of moles of KHP that reacted is equal to the number of moles of NaOH, 0.007055 mol

Convert moles to grams:

mass = number moles × molar mass = 0.007055mol × 204.23g/mol

mass = 1.4408 g.

You have to round to 3 significant figures: 1.44 g (because the molarity is given with 3 significant figures).

5. Find the percentage of KHP in the sample

The percentage is how much of the substance is in 100 parts of the sample.

The formula is:

% = (mass of substance / mass of sample) × 100

% = (1.4408g/ 1.864g) × 100 = 77.3%

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2 years ago

Identify the number of protons, neutrons, and electrons in a neutral atom of each of the following (you can refer to a periodic

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You must first know that the number of protons and neutrons are same, and neutrons number may vary. Carbon 12 has 6 protons, 6 neutrons and 6 electrons. Sodium 23 has 12 protons , 12 electrons and and 11 neutrons. Silver 108 has 47 protons, 47 electrons and 61 electrons. Finally, Sulfur 32 has 16 protons, 16 nuetrons and 16 electrons. Basically the number of neutrons in an atom can be found by subtracting proton number from mass number

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2 years ago

How much would a 50-kg object weigh on Mercury (gravity on Mercury is 3.59 m/s2)?

Andreyy89

Gravitational Acceleration or W=Mg so... Q1: W(earth)=50, W(X)=500 ---> g(X)=10*g(earth)=10*9.8=98 --> C is correct. Q2: M=W/g --> M=735/9.8=75 ---> B is correct. Q3: W=Mg=50*3.59=179.5 N ---> B is correct

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2 years ago

The electrons between atoms in metallic bonds

fgiga [73]

Answer:

Metallic bonding is the type of chemical bonding that occurs between atoms of metals. In a metallic bond, atoms share their electrons in a way that allows them to form a “sea” of free electrons. This electron sea is responsible for the unique physical and electrical properties of metals.

Explanation:

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1 year ago

I in the blanks.The solid substance left on the filter paper is called​

I in the blanks.The solid substance left on the filter paper is called