11)A hybrid suv consumes fuel at a rate of 12.8 km/L. Using dimensional analysis, howmany miles can the car travel on 25.2 gal of gasoline? 3.78 L gal; 1.61 km 1 mi)

Answers

Answer 1

Answer: Dimensional analysis is a mathematical method that makes use of the fact that a number or expression with a unit can be multiplied by a factor without changing its value. It is done as follows:

12.8 km/L (25.2 gal) (3.78 L / 1 gal) (1 mi / 1. 61 km)

From the expression above, we cancel units and evaluate it. Then, this gives us,

757.31 miles

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Trisha is learning how to do a first-aid procedure known as CPR. She is practicing using a mannequin, or a model of the top half of the human body.What is one limitation of a CPR mannequin?
A.
It is not possible to press down on the chest of a CPR mannequin.
B.
It is not possible to breathe into the mouth a CPR mannequin.
C.
It is not possible to check for a real pulse on a CPR mannequin.
D.
It is not possible to lay a CPR mannequin on the floor.

Answers

C is the answer 〰️I need more characters Oop

Answer: The answer is C cause a CPR doll can do the rest

Explanation: pls mark as brainliest

Match the careers in chemistry.1. sales technician
2. theoretical research legal services
3. quality of life corporate management
4. finds practical applications information chemist
5. manufacturing environmental engineer
6. market research R&D
7. short and long term objectives marketing
8. patent rights production
9. services equipment product development

Answers

1. sales / marketing

2. theoretical research / information chemist

3. quality of life /environmental engineer

4. finds practical applications / R&D

5. manufacturing /production

6. market research /product development

7. short- and long-term objectives /corporate management

8. patent rights /legal services

9. services equipment /technician

The careers in chemistry should be closely related to working with chemical substances and the methods involved in experiments. Thus, the answers are finds practical applications information chemist and market research R&D.

What is the mass of 6.3 moles of Sulfur

Answers

Answer:

201.6 grams is the mass of 6.3 moles of sulfur.

Explanation:

$Moles(n) =\frac{\text{Mass of the compound}(m)}{\text{molar mass of the compound}(M)}$

Moles of sulfur ,n= 6.3 moles

Atomic mass of sulfur = M = 32 g/mol

Mass of the sulfur = m = ?

$m=M* n$

$=6.3 mol* 32 g/mol=201.6 g$

201.6 grams is the mass of 6.3 moles of sulfur.

The molar mass of sulfur is 32 g/mol.
The mass of 6.3 moles of Sulfur is 32×6.3=201.6 grams

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What is mean by scientific approach in chemistry
brief it

Answers

Answer:

scientific approach

Explanation:

Method of investigation in which a problems is First identified and observations, experiment are done

A 25.5 liter balloon holding 3.5 moles of carbon dioxide leaks. How many grams of carbon dioxide escaped before the container could be sealed if the new volume of the balloon is 15.4L?

Answers

Assumptions made:
1. Temperature and pressure is constant.
2. Ideal gas is involved.

The variables involved in this problem is the moles of the gas and the volume. We find their relationship from the ideal gas law. PV=nRT. With all other concept besides n and V is constant, Volume is directly proportional to the amount of gas inside the balloon. Solving this is as simple as ratio and proportion.

25.5L/3.5 moles = =15.4L/X moles
X= 2.11 moles.

Answer:

61 grams

Explanation:

If the number of moles of CO₂ in the balloon is given to be 3.5 moles, the mass of CO₂ in the balloon will be

number of moles = mass ÷ molar mass

Hence, mass = number of moles × molar mass

Molar mass of CO₂ is 44g. This is 44 because the atomic mass of carbon is 12 while that of oxygen is 16. Thus, 12 + (16 × 2) = 44 g

mass= 3.5 moles × 44g

mass = 154g (which is the initial mass)

When the mass of CO₂ in the 25.5 liter balloon is 154g, the mass of CO₂ in the balloon when the volume of CO₂ in the balloon is 15.4 liter will be X

To get X,

25.5 L ⇒ 154g

15.4 L ⇒ X

cross-multiply, and

X = (15.4 × 154) ÷ 25.5

X = 93.00 grams (which is the final mass)

93.00 grams of CO₂ was left in the balloon, hence the mass of CO₂ that escaped will be: initial mass minus final mass

= 154g - 93g

= 61g

The mass of CO₂ that escaped is 61 grams

Choose the correct one plz!