7. The standard width between rails on North American and most European railroads is 4 ft 8 in. Calculate this distance in.... a. centimeters. b. meters. oqaa

Q: a. The Recommended Dietary Allowance (RDA) of dietary folate intake shouldn't be higher than 400 ug…

A:

Q: Visualize a 12-ounce can of diet cola and a 12-ounce can of regular cola are added to a sink full of…

A: Given : The regular cola sinks and the diet cola floats in water.

Q: T/F If a mixture can be separated into pure substances via filtration, the original mixture was a…

A: To identity the whether the given statements are true or false

Q: . A chemist mixes sodium with water and witnesses a violentreaction between the two substances. This…

A: The given statement is   A chemist mixes sodium with water and witnesses a violent reaction between…

Q: Earth’s oceans contain approximately 1.36 * 109 km3 of water. Calculate the volume in liters

A: Given information,      Volume of water is 1.36 * 109 km3 .

Q: 1. What is a unit?

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A: Mass of the filled acetone is 13.33g. The length of the glass tube is 20.0cm.

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A: Details explanation is given below

Q: A small hole in the wing of a space shuttle requires a 18.7 cm patch. (a) What is the patch's area…

A: Area of the patch is 18.7 cm2.

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A: Given : the mass of water = 1331 g We know, The density of water  = 1.0 g/cm3 The formula for…

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A: Rule for significant figure in Mathematical operation:(1) Addition and Substraction round by  the…

Q: A hybrid electric vehicle has an EPA gas mileage rating of 53mL/gal in the city. How many kilometers…

A: 1 gallon = 3785.41 ml 53 miles = 85.2952 km mileage of car = 53 miles/gal or 3785.41 ml needed to…

Q: Ice cubes float in a glass of water because solid water is less dense than liquid water. (a)…

A: a) The density of ice has to be given, Given: mass =7.36 g Side=2.0 cm. Calculation. Volume=a3…

Q: A small hole in the wing of a space shuttle requires a 17.7 cm2 patch. (a) What is the patch’s area…

A: (a) The patch area given is 17.7 cm2 Using conversion factors 1 cm2 = 10-4 m2 1m2 = 10-6 km2 So,

Q: 17. What is the mass of an object that has a density of 0.23 g/cm and whse volume is 52 cm?

A: As requested, the solution of question number 17 is as follows: Given:  Density of substance=…

Q: 1.65 meters to cubic mililiters

A: As known unit conversion:

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Q: Water has a density of 0.997 g>cm3 at 25 °C; ice has a densityof 0.917 g>cm3 at -10 °C. (a) If…

A: Density describes any substance's weight that gets divided by the substance's volume. For bulky…

Q: a sample containing 33.42g of metal pellets is pound into a graduated cylinder initially containing…

A: Given mass of metal                 = 33.42 gram  Initially volume of water = 12.7 mL  Final Volume…

Q: The density of mercury is 13.6 g/mL. Comment on how the density of mercury could cause environmental…

A: Here we have to comment how the density of mercury could cause environmental problems-

Q: Sample A weighs 30.00 g and displaces 15.00 mL of water. Sample B weighs 20.00 g and displaces 30.00…

A: Given,  Mass of sample A = 30.00 g Volume of sample A = 15.00 mL  Mass of sample B = 20.00 g Volume…

Q: Silicon for computer chips is grown in large cylinders called“boules” that are 300 mm in diameter…

A: In order to calculate the number of wafers that can be cut out we first write down the given data:…

Q: Fossils show that humans have existed

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Q: the purpose of space travel, for example-these containers could slowly release oxygen into the…

A: Since you have posted question with multiple sub-parts, we are entitled to answer the first 3 only.…

Q: A Rectangular titanium soild weighs 152.213 g and measures 7.50cm by 3.00 cm by 1.50cm. Refer to…

A: Given : Mass of titanium metal = 152.213 g And the dimensions of metal = 7.50 cm by 3.00 cm by 1.50…

Q: Classify each substance by composition, first as mixture (MX) or a pure substance (PS): sugar…

A: We know, Mixture : A mixture is any substance which is made up of two or more different substance ,…

Q: a.)What is the mass of water in a 150 mL 70% ethyl alcohol? Consider the density of water at 25 °C.…

A: a.) 70% ethyl alcohol means 70mL ethyl alcohol is present in 100mL solution. Therefore, volume of…

Q: My Data: Ensure Nutrition Shake: 0.038 g/mL Class Data: Group 7:Ensure: 0.0233 g/mL Is 0.0233 g/mL…

A: The measured values are not close to the true value and thus this value is not accurate.

Q: The population density of worms in a particular field is 35 worms per cubic meter of soil. How many…

A:

Q: What is 7.13 inches converted to meters?   Recall that 2.54 cm = 1 in

A:

Q: The U.S. quarter has a mass of 5.67 g and is approximately1.55 mm thick. (a) How many quarters would…

A: It is given that a U.S quarter has a weight of 5.67 g and has a thickness of 1.55 mm. and it needs…

Q: 72. Complete the following conversions between SI units.

A:

Q: Mass of group is in-lbs is 475.0lbs convert it to  kg  cg

A:

Q: The U.S. quarter has a mass of 5.67 g and is approximately1.55 mm thick. (a) How many quarters would…

A: Given data, The U.S. quarter has a mass of 5.67 g and is approximately 1.55 mm thick. How many…

Q: The world record for an adult male running 1.00 miles is 3.72 calculate this speed in m/sec

A: Given: Distance = 1.00 mile Time = 3.72 sec

Q: A 1-ounce serving of Doritos has 17 g of carbohydrates. What is this mass unit of ounces?

A: The relationship between mass in ounce and g s  1 ounce = 28.35 g

Q: The dosage for an antibiotic is prescribed at 6.0 mg per kilogram of body weight, taken twice daily…

A:

Q: use data to discuss whichc calculated density is more accurate.

A: Density is obtained by dividing mass by volume Density(d) = mass(m)Volume(v) => m = d*v (or) v =…

Q: A cylindrical glass tube 20.0 cm in length is filled with acetone. The mass of the acetone to fill…

A: Given: length of tube=20.0 cmmass of acetone=19.33 gdensity of acetone=0.784 g/mL To find: Diameter…

Q: Calculate the mass of ethanol in 1.83 qt of ethanol. The density of ethanol is?

A: Calculate the volume of ethanol:

Q: current is measure as 0.00007 A/cm2 unit area in units of mdd.

A: Zinc is the d-block element.  the symbol for Zinc is Zn.  Corrosion is a natural process and it…

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: Earth's oceans have an average depth

A: An ocean is a huge body of saltwater that covers 71 percent of surface of earth.

Q: 1.23 Which separation method is better suited for separating asolution of sugar and water into pure…

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Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.