![littlebrain2672](/avatars/23024.jpg)
littlebrain2672
22.01.2022 •
Chemistry
(a) A cube of osmium metal 1.500 cm on a side has a mass of
76.31 g at 25 °C. What is its density in g>cm3 at this tempera-
ture? (b) The density of titanium metal is 4.51g>cm3 at 25 °C.
What mass of titanium displaces 125.0 mL of water at 25 °C?
Solved
Show answers
More tips
- H Health and Medicine Simple and Effective: How to Get Rid of Cracked Heels...
- L Leisure and Entertainment What to Bring on a Hike? Essential Items to Pack for a Safe and Enjoyable Adventure...
- L Leisure and Entertainment Couchsurfing: A New Way to Travel...
- S Style and Beauty Autotanning: Harmful or Safe?...
- F Food and Cooking 10 Ideas for a Wedding Anniversary Gift...
- H Health and Medicine How to Reduce Sweating in the Heat and Beyond: Say Goodbye to Excessive Sweat...
- F Food and Cooking Do Aphrodisiacs Really Work? Separating Fact from Fiction...
- H Health and Medicine What to Eat to Lose Weight?...
- A Animals and plants How to Teach Your Parrot to Talk?...
- H Health and Medicine How to Improve Your Posture?...
Answers on questions: Chemistry
- C Chemistry What is the molar concentration of an aqueous solution that has 200g of Iron (II) Chloride dissolved in 450mL of water? (convert to moles then solve for Molarity)...
- C Chemistry Osmium has the highest melting point and is the densest naturally occurring element. If you are given an Osmium metal block that measures 2.7 mm, 4.3 mm, and 3.9 mm....
- C Chemistry (100 points) {brainliest} Solar energy is light and heat from the sun that s harvested to produce electricity or otherwise provide energy. Which of the following statements...
- C Chemistry How does chopping a solid up into little pieces change its surface area?...
- C Chemistry How many grams of manganese (IV) oxide are needed to make 5.6 Liters of a 2.1 solution? (solve for moles then convert to grams)...
- C Chemistry Afootball field is about 100 m long. if it takes a person 20 seconds to run its length, how fast were they running ?...
- C Chemistry What is its molecular formula? type in the correct number based on the label. cahb α....
- M Mathematics Question 9 How many milliliters of water should be evaporated from a 10 milliliters mixture that is 50% salt in order to be left with one that is 80% salt?...
- B Business How changing lifestyles and attitudes affect retail business industry...
- C Chemistry Nuclear symbol for the isotope of tin that contains 70 neutrons per atom...
Ответ:
Scientific method
Scientific method
Ответ:
50
Step-by-step explanation:
FIRST, we need variables. Once we define variables, it's much easier to turn this word problem into a math problem.
Let a = first side
Let b = second side
Let c = third side
NOW, we can turn the words into equations:
"a triangle has a perimeter of 165 cm."
a + b + c = 165
"the first side is 65cm less than twice the second side."
a = 2b - 65
"the third side is 10cm less than the second side."
c = b - 10
Before we finish, I have to ask: Who writes problems like this??? Pointless problems like these are why kids don't like math! Ugh. Drives me crazy. It's a shame, because solving math problems really does have a certain satisfaction, once you learn how. [Okay. I'm done. Back to the problem.]
If we could get this to have only one variable, we could solve it. Substitution to the rescue!
a + b + c = 165 (rewrote equation from above)
(2b - 65) + b + (b - 10) = 165 (substituted "a" and "c" from equations above)
See how that works? Let's solve it.
2b - 65 + b + b - 10 = 165 (dropped the parentheses, because there was nothing to distribute, not even a minus sign)
4b - 75 = 165 (combined like terms)
4b = 240 (added 75 to both sides)
b = 60 (divided both sides by 4)
We found the second side! We can find the first and third sides using those equations from above:
a = 2b - 65
a = 2*60 - 65
a = 120 - 65
a = 55
c = b - 10
c = 60 - 10
c = 50
All done