Q: What is Chemistry as a subject
A: what is chemistry
Q: A gallon (3.78L) of latex paint can cover 385 ft2 of the surface of a wall. What is the average…
A: Since, 1 L = 103 cm3∴3.78 L = 3.78 x 103 cm3Since 1 ft2 = 929 cm2∴ 385 ft2 = (385x929) cm2…
Q: What, and how does some characteristics of a good student, and how does studying chemistry help…
A: everything we do is chemistry. Starting from cooking to sleeping , all depend upon chemical…
Q: Green chemistry rests on a set of 12 principles. What are they?
A: 12 principles of green chemistry has to be given,
Q: Copper melts at 1083 °C, has a density of 8.92 g/mL, is a good conductor of electricity, and turns…
A: Chemical property is the ability of a substance to undergo a specific chemical change. These…
Q: A good example of a homogeneous mixture is(a) a cola drink in a tightly capped bottle(b) distilled…
A: A mixture is a blend of components where the constituent components retain their properties and…
Q: What type of metal is this? Aluminum, Copper, Lead or Iron?
A: Specific heat of metal in cal/g˚C is 0.220 Specific heat of metal in J/g˚C is 0.920.
Q: How can a liquid be distinguished from a fine powder? What type of experiment or observation might…
A: Both are made up of small particles. Perhaps the particles in a powder are larger than those of a…
Q: 2. What is matter composed of?
A: To find: What is matter composed of
Q: Explain the history of chemistry
A:
Q: A long ton is defined as exactly 2240 lb. What is this mass in kilograms?
A: Concept introduction: The ratio of two equivalent quantities that are expressed in terms of…
Q: 1. In a change, one kind of matter is turned into another.
A: The answer to the following question is--
Q: Definetion of chemistry
A: Given Name of subject = Chemistry Definition = ?
Q: one
A: Two Different objects were put in Water. One floats but another one is sunk.
Q: • If a car travels a distance of 241 km, what is that distance in miles?
A: Given Distance = 241 km
Q: If 12.87 mL of a salt solution weighs 13.357 g, what is the density of the salt solution?
A: The relation between mass, volume and density is as follows : Density = mass/volume
Q: Mass is the measure of what property of matter?
A: Properties of matter are mainly two types such as physical properties of matter and chemical…
Q: The density of liquid bromine is 2.928 glcm³. The volume of 29.572 g sample is?
A: Density can be defined as mass of substance per unit volume. The mathematical expression for density…
Q: Which of the following is a homogeneous mixture? a) water and sand b) water and salt c) water and…
A:
Q: Is the melting point of a chemical a physical property or chemical property
A: Physical property :- A property which can be measured without changing the chemical composition of…
Q: What is meant by the phrase characteristic properties of matter?
A: To define this phrase , we would first define matter and then we would see what is meant by…
Q: 4. How do you distinguish a. Chemical properties from physical properties b. Distillation from…
A:
Q: Vegetables is an example of Element? Compound? Homogenerous mixture? Heterogenous mixture?
A: Vegetables are plant or part of plant that are cooked to consume in human body. They contain some…
Q: what is the importance of chemistry for medical students?
A: Chemistry- Branch of science which deals with the study of chemical properties of elements, their…
Q: why or why not does a golf ball fit the definition of matter?
A: Solution: Matter is everything we see around us which has a mass and occupies space.Matter has…
Q: chemical tests were used to differentiate between the two substances in the mixture. Which of the…
A: Physical properties:These are the type of properties which are considered as ‘observables’ i.e.…
Q: Fossils show that humans have existed
A: By studying the fossil record we can tell how long life has existed on Earth, and how different…
Q: total voulme in graduated cylinder is 1.00ml total numbers of drops placed in cylinder is 24 what…
A: Volume of cylinder =1ml No of drops in 1ml cylinder is =24 24 drops occupy volume =1ml 1drop…
Q: Which of the following describes a chemical property? a. The density of iron is 7.87 g/cm3b. A…
A: The chemical property has to be described.
Q: Which among the properties are measurable? Which ones are not?
A: Measurable properties are those properties that can be measured using scientific tools.
Q: What volume of water (ml) would a 51.4 g sample of pure gold displace? The density of gold is 19.3…
A:
Q: Suppose the densities of two metals are so close together that density is difficult to use to be…
A: Metals are highly electropositive and have strong metallic bond. Metallic bonds are stronger than…
Q: Using an example, explain the difference between a physical property and a chemical property
A:
Q: A piece of platnium metal ore obtained was determined to have a mass of 1.6124 grams. The density of…
A:
Q: what is the importance of studying matter and mixtures in chemistry? explain.
A: Matter can be defined as the substance that has mass and occupy space. There are three states of…
Q: Who is the founder of chemistry?
A: The person who known as founder of chemistry is Antoine Lavoisier. The complete name of Antoine…
Q: Which of the following is based upon repeatable data and is no longer tentative? -Theory…
A: Which of the following is based upon repeatable data and is no longer tentative? -Theory -Scientific…
Q: When large pieces of a purple-black crystalline solid are gently heated, a purple vapor is formed…
A: Solution : Change is defined as the process that shows the change in state, shape, color, shape,…
Q: Based on this result, is the woman's drink a pure substance or a mixture
A:
Q: Although the standard of mass is, strictly speaking, the kilogram, in chemistry we more commonly…
A: Answer - Although the standard of mass is, strictly speaking,the kilogram, in chemistry we more…
Q: Which of the following is an element? Fe,(SO,), Li O2
A: The substances that have a tendency to occupy space are considered as matters. The matters can be…
Q: A beaker weighs 145.60 grams. The chemical weighs 3.467 grams. What is the total mass?
A: Given: Weight of beaker = 145.60 g Weight of chemical = 3.467 g
Q: Consider One Particular Issue in Our Society (for instance: industry, etc.,) and Describe and…
A: Industry It is an organization that provides and supplies goods and services. It could be primary,…
Q: The area of a telescope lens is 7903 mm² (a) What is the areain square feet (ft² )? (b) If it takes…
A: a) Conversion of mm into feet: 1 feet=304.8 mm1 mm =1304.8 feet=0.00328084 feet Calculation of area…
Q: What are chemical and physical properties?
A: Physical properties can be observed or measured without changing the composition of matter. Physical…
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- Part B O2 (8) + 2H20 (1) + 2Cu (s)+40H (aq) +2Cu²* (aq) Express your answer using two significant figures. K- 8.3 • 1016 Submit Previous Answere Request Answer X Incorrect; Try Again; 4 attempts remaining • Part C Bra (1) + 21 (aq)→2Br (aq) + I2 (s) Express your answer using two significant figures. K-1.73 • 10 51Calculate the gravitational force of attraction for two protons separated by 69.0 pm. The mass of a proton is mp = 1.673 x 10-27 kg. Express your answer using two significant figures. F₁ = Submit ΑΣΦ Request Answer ? NBoxes 1-4 box 1 answer choices: 0, 3, 1, 2, or 4. box 2 answer choices: 2, 1, 3, 0, or 4. box 3 answer choices: 10.7, 0.241. 0.482, 0.804, 5.36, 0.121, 3.21, or 1.61. Box 4 answer choices: L^2/mol^2•s, L^3/mol^3•s, L/mol•s, 1/s, or L^4/mol^4•s
- 1) Perform the indicated mathematical operations. State the uncertainty of the final answer as ± 1-digit variation in the least significant digit. (remember that the last significant digit's place holder is the most uncertain digit!) 7.700 x 2.1 = uncertainty: 2.132 + 17 + 4.04 = uncertainty: 27000 + 500 = uncertainty: 30.0 x 50.0 = uncertainty: (9.6 × 107)(1.24 × 10³)_ uncertainty: 1.897 x 10211 of 1 Review | Constants | Periodic Ta Part B [(285.0 x 10°) – (1.300 × 10’)] × 2.8988 Express your answer to the appropriate number of significant digits. Ενα ΑΣφ [(285.0 x 10°) – (1.300 × 10')] × 2.8988 = Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Your response should have more than three significant figures since both values involved in the product will have greater than three significant figures When you take the difference between 285.0 x 10° and 1.300 x 103 the last significant digit is determined by the value that is significant to the least number of decimal places, which is 285.0 x 105 Part C 1:37 62°F 1/14/ acerSolid PbBr2 (Ksp = 6.6 x 10-6) added to a solution of AgNO3, which results in the formation of solid AgBr (Ksp =5.5 x 10-13). For the following question, enter your answer to the appropriate number of significant figures. When inputting an answer in scientific notation, use “e” notation rather than multiplying by a power of 10. For example: 0.00031 = 3.1e-4. Do not write 3.2x10^-4. Do not include units in your answer (but do consider them when solving the problem!) Calculate Koverall using the balanced equation.
- Ben was tasked to prepare 10 paper tabs from a 20 mg tablet for neonatal patient X. However, the pharmacist found out that there was a discrepancy of 0.29 mg from the original weight after the preparation. The recorded weighing (in mg) are as follows: 2.01, 2.00, 1.89, 1.96, 1.99, 2.02, 1.98, 1.94, and 1.97. What is the total weight of the prepared paper tabs? What is the weight needed to complete the data? What is the computed mean? What is the summation of the differences? What is the computed mean deviation? What is the summation of the square of the differences? What is the computed standard deviation?What is the error in the answer to the following? a) (22.10 ± 0.01) + (37.51 ± 0.02) = b) (30.88 ± 0.03) - (31.57 ± 0.06) = c) (5.88 ± 0.05) × (2.17 ± 0.01) =3. Evaluate the following expression: 18 + (6 - 2)² × 3 4. Express the following sum as a decimal to four significant figures: 1/3 + 3/4 = 5. Solve for the positive value of x that satisfies the following equation: (x + 9)(x - 2) = 60 6. Solve for x to the proper number of significant figures: (0.500)^(x/4.50) = 0.100 7. Solve for x: 14x + 10 = 38 8. Which of the following is a pure substance that cannot be broken down into simpler substances by chemical means? A) Homogeneous mixture B) Chemical compound C) Chemical element D) heterogeneous mixture E) Solution 9. Which one of the following is NOT an example of a compound? A) concrete B) rust (iron oxide) C) carbon dioxide D) ammonia 10. Which one of the following is an example of an element? A) brass B) nickel C) bronze D) sterling silver
- 320.5 (6107.5/2.1) Express your answer to the appropriate number of significant figures.I am told that when determining the number of significant figures, if the decimal place is absent, then you start counting from the first nonzero number on the right side and continue counting to the left until you reach the last digit. However, if the decimal place is present, start counting the first nonzero number from the left and continue counting to the right until the final digit has been reached. For example, the number 50 only has two significant figures, while the number 50.00 has four significant figures. However, how does the number 50 have two significant figures? If I have to start countingfrom the right because of the absence of a decimal place, and I have to begin with the first non zero number, I would have to start from 5 and there is nowhere to count further to the left. How does the number 50 have two significant figures?1. Evaluate the following expression to the nearest whole number: 6⁶ × 6⁻⁴ 2. Evaluate the following expression to the nearest whole number: log(10⁵) 3. Evaluate the following expression: 18 + (6 - 2)² × 3 4. Express the following sum as a decimal to four significant figures: 1/3 + 3/4 = 5. Solve for the positive value of x that satisfies the following equation: (x + 9)(x - 2) = 60 6. Solve for x to the proper number of significant figures: (0.500)^(x/4.50) = 0.100 7. Solve for x: 14x + 10 = 38 8. Which of the following is a pure substance that cannot be broken down into simpler substances by chemical means? A) Homogeneous mixture B) Chemical compound C) Chemical element D) heterogeneous mixture E) Solution 9. Which one of the following is NOT an example of a compound? A) concrete B) rust (iron oxide) C) carbon dioxide D) ammonia 10. Which one of the following is an example of an element? A) brass B) nickel C) bronze D) sterling silver