any help with these questions would help i'm lost

Any Help With These Questions Would Help I'm Lost

Answers

Answer 1

Answer:

1.  31.25 mL

2.  1.98 g/L

3.  0.45 g/mL

Explanation:

For each of the problems, you need to perform unit conversions.  You need to use the information given to you to convert to a specific unit.

1.  You need volume (mL).  You have density (g/mL) and mass (g).  Divide mass by density.  You will cancel out mL and be left with g.

(50.0 g)/(1.60 g/mL) = 31.25 mL

2.  You are given grams and liters.  You need to find density with units g/L.  This means that you have to divide grams by liters.

(0.891 g)/(0.450 L) = 1.98 g/L

3.  You have to find density again but this time with units g/mL.  Divide the given mass by the volume.

(10.0 g)/(22.0 mL) = 0.45 g/mL


Related Questions

Which of the following is a description of an exothermic reaction?

A. releases heat
B. reactants have less enthalpy than the products
C. ∆H is positive
D. gets cold

Answers

A description of an exothermic reaction is it releases heat. The correct option is A.

What is an exothermic reaction?

An exothermic reaction is a reaction in which heat is released into the atmosphere. In these reactions, less energy is needed to start the reaction and the energy is released when bonds are made in the products. Delta H is always negative in these reactions.

Energy is always given off when the reaction happened, in the form of heat and light. Examples are burning of wood, melting of ice, combustion, corrosion, etc.

Thus, the correct option is A. releases heat regarding a description of an exothermic reaction.

Learn more about exothermic reaction, here:

https://brainly.com/question/18523044

#SPJ5

Which of the following represents the least number of molecules?
(a) 20.0 g of H2O (18.02 g/mol)
(b) 77.0 g of CH4 (16.06 g/mol)
(c) 68.0 g of CaH2 (42.09 g/mol)
(d) 100.0 g of N2O (44.02 g/mol)
(e) 84.0 g of HF (20.01 g/mol)

Answers

Answer:

A ; 20g of water has the least number of molecules

Explanation:

Here, we want to know which of the options represent the least number of molecules;

To calculate this, we are going to first calculate the number of moles using the formula below;

Number of moles = mass/molar mass

Then from the number of moles, we can calculate the number of molecules by multiplying the number of moles by 6.02 * 10^23 molecules

Let’s proceed;

a. That will be 20/18.02 = 1.1099 moles

1.1099 * 6.02 * 10^23 = 6.68 * 10^23 molecules

b. That will be 77/16.06 = 4.8 moles

4.8 * 6.02 * 10^23 = 2.89 * 10*24 molecules

c. That will be 68/42.09 = 1.62 moles

1.62 * 6.02 * 10^23 = 9.73 * 10^23 molecules

d. That will be 100/44.02 = 2.27 moles

2.27 * 6.02 * 10^23 = 1.37 * 10^24 molecules

e. That will be = 84/20.01 = 4.2 moles

4.2 * 6.02 * 10^23 = 2.53 * 10^24 molecules

From all the values obtained, the lowest is 20g of water

How many moles of calcium are in 5.82g of calcium?

Answers

Answer:

0.024951344877489 mole.

Explanation:

y

Other Questions
Based on this excerpt, the authors are most likely to attempt to answer which question? How did colonists challenge the rules of crowned kings? How did the Age of Sugar differ from the Age of Revolutions? When did Europeans decide to speak about equality? Why did some Europeans decide they wanted to speak out about slavery? 5. An object is a regular, rectangular, solid with dimensions of 2 cm by 3cm by 2cm. It has a mass of 24 g. find its density. Which of the following expressions match the translation nineteen more than the product of 4 and a number? 4n + 19 4(n + 19) 19(n + 4) 4 + 19n Looking into the sky one night, Tori wondered how far into outer space she would get if she drove a car for 3.21 103 hours at a rate of 70mph. She calculated and determined that a car travelling at 70 mph covers approximately 1.13 105 meters per hour. Tori wrote this expression to determine the distance she would travel into outer space. (3.21 103)(1.13 105) Estimate the distance travelled. Almost-equals30 1015 meters Almost-equals3 108 meters Almost-equals30 108 meters Almost-equals3 1015 meters Lamar bought a 6-kilogram can of pistachios for $6.90. What is the unit price?A $1.90B) $1.30C$1.10D $1.15 Type the correct answer in each box. Use numerals instead of words. If necessary, use / for the fraction bar(s).The equation of the line in this graph is y = _ x +_ chinese food or korean why (my journal entry) Which of the following is a producer? O mouse cactus O snake O goose Many people in the Deaf community view deafness as a different way of experiencing the world and not as a disability,A TrueB. False List two ways in which bacteria are important to humans. Briefly explain these ways. Which mineral is found in almost every type of rock? An advantage of light microscopes compared to electron microscopes is that light microscopesallow you to view the surface of cells in greater detail than electron microscopes have a higher magnification capability because they use natural light allow you to view living cells, while electron microscopes do nothave a greater resolution available because they use white light If the sum of a number and six is doubled, the result is nine less than the number. Find the number Why was the great Sphinx builtHelp!!!! Why does the author end the story before showing Mrs.Wright's trial?A. To prevent the reader from understanding Mrs.Peters's feelingsB. To satisfy the reader by directly answering questions the story raisesC. To allow the reader to guess whether Mrs.Wright will be convictedD. To suggest that Mrs.Hale will change her mind after the stories end The Math 123 book includes about 230 pages (not including the back parts of the book). If you aim to complete 65% of all the pages, how many should you finish? The main idea: ask yourself what is this mostly about?On Mondays, Jen gets up early for school. After school, she has soccer practice.Then she goes to karate class. When she gets home, she does her homework.JenWhat's the main idea? 6Which sentence about Swift's "A Modest Proposal" is written objectively?A Modest Proposal" uses false premises to signal that it is actually a satire.The excess of verbal irony in A Modest Proposal diminishes its overall impact.O I think Swift's satire was a brilliant way to draw attention to the issue of poverty.Swift should be ashamed of his preposterous proposal to sell and eat children. complex sentence ____________________________ as soon as _________________________ The sample mean is an example of ____. (A) interval estimation (B) point estimation (C) confidence point (D) confidence