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craig4509
29.05.2020 •
Mathematics
Will mark brainliest
Question 26 (Mandatory) (2 points)
This photo shows a clear liquid being poured into a jar with another clear liquid. A yellow forms in the jar.
Yellow stuff
Question 26 options:
solvent
plasma
solute
precipitate
Question 27 (Mandatory) (2 points)
Question 27 options:
Fill in the blank: The number of molecules in a chemical reaction are indicated by the .
Question 28 (Mandatory) (2 points)
Which picture most accurately shows the Lewis Dot Diagram of Bromine?
Question 28 options:
bromine 4
bromine 2
bromine 3
bromine 1
Question 29 (Mandatory) (2 points)
What is the correct name of the following ionic compound: CaO. Follow the correct naming rules we learned in class!
Question 29 options:
oxocalcium
calcium oxygen
calcium oxide
monocalcium monoxide
Question 30 (Mandatory) (2 points)
What is the correct name of the following covalent compound: C2H6. Follow the correct naming rules we learned in class!
Question 30 options:
ethane
carbon hydrogen
dicarbon hexahydride
carbon hydride
Question 31 (Mandatory) (2 points)
What happens in a neutralization reaction?
Question 31 options:
Acid and base results in salt and water that are neutral pH
Nothing happens
pH of 7 makes everything it touches turn neutral
Protons balance electrons
Question 32 (Mandatory) (6 points)
Matching: Label each of the following characteristics as Acid or Base.
Question 32 options:
pH 5
corrodes active metals
high pH
turns litmus paper blue
donates H+
slippery
1.
acid
2.
base
Question 33 (Mandatory) (2 points)
Covalent bonds occur between and .
Question 33 options:
metals and nonmetals
metals and metals
nonmetals and nonmetals
Question 34 (Mandatory) (2 points)
Ionic bonds occur between and .
Question 34 options:
metals and nonmetals
nonmetals and nonmetals
metals and metals
Question 35 (Mandatory) (2 points)
Why are buffers important in living organisms?
Question 35 options:
Buffers make bases work more effectively
Buffers prevent pH changes in body systems
Buffers kill bacteria and viruses
Buffers cause acids to break down food
Question 36 (Mandatory) (2 points)
Question 36 options:
Fill in the blank: The number of atoms of an element in a molecule are indicated by the .
Question 37 (Mandatory) (2 points)
Chemical reactions must be because...
Question 37 options:
Balanced because of the law of conservation of matter and energy
Larger on the product side because new substances are produced
Not enough information
Smaller on the reactant side because the reactants are used up
Question 38 (Mandatory) (2 points)
Which of the following is NOT an indication that a chemical reaction took place?
Question 38 options:
New substance formed
Bubbles
Change in shape
Precipitate forms
Solved
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Answers on questions: Mathematics
- M Mathematics Which of the following is an example of a predator/prey relationship? a. a fungus grows on a fallen log and decomposes it. b. mistletoe attaches to another plant and uses...
- M Mathematics (1 pt) multiply. 791.3 × 0.06 a. 47.478 b. 474.78 c. 4,747.8 d. 47,478...
- M Mathematics Given one leg of a right triangle Is 5cm and the hypotenuse is 13m, find the other leg....
- M Mathematics You throw a basketball from a height of 3 feet with an upward velocity of 11 feet per second. The function h=-16t^2 +11 + 3 gives the height h of the basketball after t seconds....
- M Mathematics A veterinarian’s assistant made a table that shows the animals seen in the office in one week. What is the probability that the pet seen was sick? Enter your answer as a...
- M Mathematics What should be true about -5 and 5? Why?...
- M Mathematics What is the equation of the line...
- M Mathematics Solve for 2sin^2 x=1 for the interval -2x2...
- M Mathematics The difference between two numbers is 3. The sum of the same two numbers is 13. What are the two numbers? 1...
- M Mathematics What is the measure of angle 5?...
Ответ:
7/50 = .14
7/9 = .7 repeating
11/12 = .916 (with the 6 repeating)