The mass of a sample is 550 kilograms. Expresses that mass in milligrams? Express your answer in scientific notation rounded to three significant figures.

Q: Aqueous hydrochloric acid  HCl  will react with solid sodium hydroxide  NaOH  to produce aqueous…

A: The balanced chemical equation for given reaction is as follows,

Q: what is the density of the salt in g/mL?

A: Density = mass ÷ volume    Rule for significant figure in division:- Round off final answer as per…

Q: If you add 21.1 mL of solution from a buret into a flask that already contained 38.7 mL of solution,…

A: Given that,  21.1 mL of solution from a buret is added into a flask that already contained 38.7 mL…

Q: A chemist must prepare 475. mL of 1.00 M aqueous sodium nitrate (NaNO3) working solution. He'll do…

A: Volume of sodium nitrate =475 mL = V2 Concentration of sodium nitrate =1.00 M =M2 Molarity=5.64mol/L…

Q: A chemist prepares a solution of aluminum chloride AlCl3 by measuring out 4.42g of aluminum chloride…

A: Interpretation -  To determine the  concentration ( in mole/L ) of the chemist's aluminum chloride…

Q: An electric current of 21.10 A transports 880. μC of charge. Calculate the time this took. Be sure…

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Q: sample of lead has a mass of 0.490. Calculate the number of moles. Your answer should be rounded to…

A: Given mass=0.49g Molar mass =207 Mole= mass/molar mass Mole=0.49/207 Mole= 0.0023

Q: A chemist must prepare 450. mL of 1.00 M aqueous barium chloride (BaCl,) working solution. She'll do…

A: Molarity of stock BaCl2 solution(M1) = 1.27 M  Molarity of final BaCl2(M2) = 1.00 M V2 = 450. mL

Q: A chemist prepares a solution of sodium nitrate (NANO,) by weighing out 281.1 g of sodium nitrate…

A: Given data, Mass of NaNO3 = 281.1g Volume of solution = 450.0mL

Q: Your calculator gives you the number 1761.2868 as the volume (in cm^ 3) of a box 2.0 ft by 6.5 cm by…

A: When rounding off the result of a multiplication, the number of significant figures in the final…

Q: You add 5.8 g iron to 21.90 mL of water and observe that the volume of iron and water together is…

A: Mass of iron, m = 5.8 g  Initial volume of water, V1 = 21.90 mL  Final volume of water and iron…

Q: The composition of a mixture of potassium chlorate and potassium chloride is to be determined. A 9.5…

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Q: An atom of a particular element has a volume of 7.8 x 10-31 m3. What is this volume in cubic…

A: An atom is always neutral because of the equal number of electrons and protons. Electrons are…

Q: A certain compound has a molar mass of 323.4 g/mole  .  Determine the number of grams in 2.73 x 10-2…

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Q: A chemist weighed out 7.64 g of tungsten. Calculate the number of moles of tungsten she weighed out.…

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Q: Aqueous hydrochloric acid HCl will react with solid sodium hydroxide NaOH to produce aqueous…

A:

Q: A chemistry student must write down in her lab notebook the concentration of a solution of sodium…

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Q: A piece of cardboard is 12.0 cm long and 6.3 cm wide. What is the area of this piece of cardboard in…

A: Given,A piece of cardboard is 12.0 cm long and 6.3 cm wide.

Q: Limiting reactants Aqueous hydrochloric acid (HCI) will react with solid sodium hydroxide (NaOH) to…

A: In the given question we have to calculate the maximum mass of sodium chloride that could be…

Q: e concentration in

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Q: a student uses a graduated cylinder to determine the volume of water dispensed from a 50.00 ml…

A: To find percentage difference between two values, calculate difference between two values and divide…

Q: what mass (in g) of solid lead would displace exactly 234.6 liters of water? The density of the lead…

A: Given : density of lead = 11.4 g/cm3                                                 Volume of water…

Q: You are trying to determine the density of a piece of metal. You use a balance and find that the…

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Q: Gaseous butane (CH3(CH2)2CH3) will react with gaseous oxygen O2 to produce gaseous carbon dioxide…

A: As given in the question that butane reacts with gaseous oxygen to produced carbon dioxide and…

Q: A hectacre (1.0000 x 104 m2) is a metric unit of area analogous to an acre. How many square feet are…

A: 1 feet consists of 0.3048 m and 1 square feet consists of 0.093 m2. 1 hectare consists of 10000 m2 5…

Q: mass of the necklace

A: This is simply a question of density. As we know that by using concept of density, we can calculate…

Q: A homogeneous mixture was prepared by mixing 0.15 g A, 112.3 g B and the 24.55 g C.  The volume is…

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Q: Aqueous hydrochloric acid (HCl) will react with solid sodium hydroxide (NaOH) to produce aqueous…

A:

Q: What is the volume in liters of 5.085 pounds of gold? The density of gold is 1.93 g/cm^3. Express in…

A:

Q: A student reported the mass of ten glass beads as 2.507 ± 0.015 g. What should the student report as…

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Q: A student measures a block to weigh 127.95 grams what would this mass be in milograms with the…

A: Given – Mass of block = 127.95 g   To find - convert g to mg

Q: A rectangular block of iron was found to be 19.00 cm wide, 0.31500 m high, and 720.026 mm deep.…

A: In the given problem, first we need to convert the height and width in cm. Then we use the formula…

Q: A chemist must dilute 0.0659 L of 2.78 M aqueous sodium chloride (NaCl) solution until the…

A: Given: The initial molarity of sodium chloride = 2.78 M The initial volume of NaCl solution = 0.0659…

Q: Aqueous hydrochloric acid (HCI) will react with solid sodium hydroxide (NaOH) to produce aqueous…

A: Given :- mass of HCl = 33.9 g mass of NaOH = 74 g aqueous HCl react with solid sodium hydroxide NaOH…

Q: The density of water at 4.00°C is 0.967 g/mL. How many molecules of water are present in a 499.8 mL…

A: We have to find the number of molecules of water in a given volume. The density of water is also…

Q: Calculate the volume of NaOH solution the student will need to add to reach the De

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Q: Calculate the concentration in /molL of the chemist's barium acetate solution.

A: Number of moles = mass/molar mass  Molarity = moles/volume of solution(in L)

Q: The composition of a mixture of potassium chlorate and potassium chloride is to be determined. A 9.5…

A: The reaction for the decomposition of KClO3 is shown below:

Q: Water is added to 25.0 mL of a 0.716 M KNO3 solution until the volume of the solution is exactly…

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Q: For example: 10.1 +93.4 = 103.5, because both 10.1 and 93.4 are precise to the tenths place. Solve…

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Q: Aqueous hydrochloric acid (HCl) will react with solid sodium hydroxide (NaOH) to produce aqueous…

A: We have to calculate the maximum mass of water that can be formed.

Q: A recent study found that the median concentration of lead in Canadian tap water is 2.3 x10-8 mol/L.…

A: Given,  The concentration of lead in Canadian tap water =  2.3 x10-8 mol/L. The mass of lead…

Q: Calculate the mass in grams of 13.0 mol of copper(I) sulfate. Enter your answer in scientific…

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Q: O MEASUREMENT Adding or subtracting and multiplying or dividing measurements A chemistry student…

A: Given: Mass of graduated cylinder = 1.5 g Mass of ( graduated cylinder + NaOH )…

States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.