4. In the synthesis of ammonia, how many grams of N2 are needed to react completely with 45.8 L of H2 at 50°C and 2130 mmHg? 1 N2 З Н > 2 NH3

Q: Calculate the mass of hydrazine (N₂H₂) that contains a billion (1.00 × 10°) hydrogen atoms. Be sure…

A: Given that,number of H - atoms = 1.00 × 109 atoms of H Mass of N2H4 = ? ,Molar mass = 32.0452 g…

Q: Which has the smallest density? 1.) 1.5 g/mL 2.) 1.5 g/L 3.) 1.5 mg/L 4.) 1.5 g/cm3

A: To compare the given densities first of all we convert the unit of density in g/mL unit.

Q: Green plants use light from the Sun to drive photosynthesis. Photosynthesis is a chemical reaction…

A: Photosynthesis is a chemical reaction in which water (H2O) and carbon dioxide (CO2) chemically react…

Q: The average radius of a molecule of lysozyme an enzyme in tears is 1.430nm. What is its radius in…

A: To solve this we have to convert the radius from nanometer to Kilometer  We know that  1 nm = 10-9 m…

Q: A rectangular block has dimensions 2.9 cm × 3.7 cm × 12.8 cm. The mass of the block is 609.0 g. What…

A: Dimensions = 2.9*3.7*12.8 Volume = product of dimensions (length*breadth*height) = 137.344 cm3

Q: Express his mass in micrograms

A:

Q: 56. Round the number on the left to the number of significant figures indicated by the example in…

A: Significant figures of a number are those which are absolutely necessary to explain the numbers…

Q: Round 329.2258 to 2 significant digits

A: Significant figures are meaningful digits which are known with certainty. There are certain rules…

Q: An Astronaut on the moon places a package on a scale and finds its weight to be 12 N What would the…

A: Weight of package on moon = 12  N

Q: 36.5 kg 3 m to g cm 6.D 3 cm 3

A:

Q: The product of 6.89/1.3550 will have ____ significant figures.   A)  1   B)  2   C)  3   D)…

A: -> 6.89 / 1.3550

Q: Copper has a density of 4.4 g/cm3.  What is the volume of 6.83 g of copper? The volume of the…

A:

Q: Based on the information in the table, which of the four substances below is an element? O CÓ O H20…

A: The given table is,

Q: Write the number 3.51 x 1010 in standard form.

A:

Q: Put answer in scientific notation  1.67x10^4/7.49x10^-4

A: The given calculation is: 1.67×1047.49×10-4

Q: Which of the option below is an exact number 01.02 x 10³ cm 01.1052 cm 07.0 pennies O 1,000 kg

A:

Q: Express the following in scientific notation 1. 175 pm 2. 955.9 nm 3. 896.45 fm 4. 29 Gm

A:

Q: The number 24.03687 rounded to significant figures is________

A: The number 24.03687 rounded to significant figures is?

Q: If you have a pOH of 3.65 the [OH-] would be ____M.   You only need to type the number in the box…

A: of the solution is negative base-10 logarithm of hydroxide ion concentration. …… (1) 3.65…

Q: 2.8 x 4.5039 =? what is the result of the operation expressed in significant numbers? A) 12.6 B)…

A: Given  2.8 x 4.5039 = ?

Q: e) 248 cm to millimeters

A: We have to predict the value in millimeters.

Q: How many significant figures does the number 48.050 have? A) 3 B) 4 C) 5 D) 2

A: The number 48.050 have significant figures  - 5

Q: 1.04km to cm

A: We have to convert 1.04 Km to cm.  First, we have to convert 1.04 Km to meter(m) and then meter(m)…

Q: 4) What volume will a 4.67 g object occupy if its density = 7.86 g/cm³? 5) The density of mercury…

A:

Q: What would the volume (in cm) of an aluminum cube be if the density is 2.70 g/cm3 and the mass is…

A: Density = Mass / Volume Mass in grams(g) Volume in cm3 Unit of Density = g/cm3

Q: Which one of the following is the largest mass? A) 7.6 x 10 mg 8 B) 7.6 × 10'ng C) 7.6 × 10 ²kg D)…

A: The conversion of quantity from one unit system to another unit system is known as unit conversion.…

Q: The mass of a proton is 1.67 x 10-27 kg. What is the mass of a proton in femtograms? A) 1.67 x…

A: Mass of proton is sum of subatomic particles: protons and neutrons. Subatomic particles are protons,…

Q: How many sigfigs does this number have 0.021?

A: Rules:- All non-zero digits are significant. Zeros between non-zeros are significant. Trailing…

Q: 17. Divide these measurements and round off if necessary: 235 divided by 62

A: The given question is an example of division and the answer is shown below.

Q: Express the quantity 33.2 x 10-min mm. a) 33.2 mm c) 0.332 mm b) 3.32 mm d) 3.32 x 10- mm

A: The meter and millimeter both are units of length. The millimeter is equal to one-thousandth of a…

Q: Number mm 9.997 m cm 45 mm 18 cm

A:

Q: Express 34670000.0003 N in scientific notation

A: Scientific notation=> It is a way to express very large number or very small number. RULES:-  1)…

Q: 1.04 km to cm

A: The conversion of quantity from one unit to another unit is known as unit conversion. During the…

Q: 4) What volume will a 4.67 g object occupy if its density = 7.86 g/cm³? 5) The density of mercury…

A:

Q: 206 cm3 to ft3

A: The relation between cubic centimetre (cm) and cubic foot (ft) is written below.1 cm3 = 3.5315×10-5…

Q: Solve each problem, and express the answer in scientific notation.a. (4 × 1 0 2) × (1 × 1 0 8) c. (6…

A: Scientific notation is a systematic way to express very large or very small numbers.

Q: 15 - When you consider the significant numbers, which one is the result of (1,500 x 2.0) +…

A:

Q: How many significant figures does the number 48.050 have? A) 3 B) 4 C) 5 D) 2

A:

Q: (34.56 cm) * (10.00 cm)*(4.95 cm) = _____________cm3

A: Volume is the space a substance or object can occupy. It can be expressed in various units but its…

Q: A chemist has a block of gold metal (density is 19.3 g/mL). The block weighs 3.10 g. What is the…

A: The density of a substance is defined as a mass of a unit volume of the substance. The density of a…

Q: What volume of water does the graduated cylinder contain(to the proper number of significant…

A: Correct answer is (c) 32.5 mL The graduated cylinder contains 32.5 mL water. Lower level of meniscus…

Q: H 3000 B 2000 HO 1500 mpm 1000

A: Given Compounds:To Identify the structure (from the list of given structures) that corresponds to…

Q: O 1000 O 100 O 2.2 O 2200

A: Answer = 1000 gram Solution - According to the question - Given - Kilogram to Grams Hence, the…

Q: When rounding the number 2.348615 to 5 significant figures, what is the correct value? 2.2405

A: The following rules are applied in determining the number of significant figures :  Rule 1. All…

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.