Questions and answers by

Emiko

Questions (27)

why can it be said that Europeans did not discover the Americas?A. The Americans were destroyed by wildfires before anyone
1. 1 answer
2. 39 views
why can it be said that Europeans did not discover the Americas?The Americans were destroyed by wildfires before anyone
1. 1 answer
2. 58 views
Which of the following describes a claim?(1 point)A. a statement that connects evidence to a reason B. a statement that everyone
1. 1 answer
2. 72 views
Evidence is relevant if it(1 point)A. is taken entirely from an online source. B. provides enough evidence to support the claim
1. 1 answer
2. 34 views
The student claims that a ball dropped 3.0 meters would have fewer than 96 joules of kinetic energy upon hitting the ground. Is
1. 1 answer
2. 52 views
Solve the equation using the inverse operation: x/4 = 12(1 point)Responses Inverse operation is subtraction; x = 8 Inverse
1. 1 answer
2. 143 views
Which algebraic equation represents the words:Twenty percent of your grade is 80 points. What was your grade? Responses 20/80 =
1. 1 answer
2. 63 views
Which word in an expression would translate to ADD mathematically?A. difference. B. The same as. C. Out of D. total.
1. 1 answer
2. 54 views
There are 12 boys and 10 girls in your gym class. If 6 boys joined the class, how many girls would need to join for the ratio of
1. 3 answers
2. 1,373 views
You mix soda water, fruit punch concentrate, and ginger ale in the ratio of1 : 2 : 5 to make fruit punch. How many pints of each
1. 1 answer
2. 1,850 views
During launches, rockets often discard unneeded parts. A certain rocket starts from rest on the launch pad and accelerates
1. 1 answer
2. 4,060 views
The temperature of a substance ____ as its heat of fusion is added to melt the substanceA. increases B. decreases C. remains
1. 1 answer
2. 660 views
According to Boyle, pressure and volume of a confined gas are ____ proportional, and according to Charles, the volume of a gas
1. 1 answer
2. 1,254 views
What is the molecular mass of potassium hydrogen carbonate (KHCO3)?A. 110g/mol B. 84g/mol C. 68g/mol D. 116g/mol
1. 1 answer
2. 749 views
What mass of sulfur has to burn to produce 4.5L SO2 at 300°C and 101 kPa in the following reaction?S(s) + O2(g) -> SO2(g) A.
1. 0 answers
2. 564 views
What mass of sulfur has to burn to produce 4.5L SO2 at 300°C and 101 kPa in the following reaction?S(s) + O2(g) -> SO2(g) A.
1. 2 answers
2. 602 views
Which element's atomic radius changes the most in size when it becomes ionized?A. Fluorine B. Lithium C. Sodium D. Chlorine
1. 3 answers
2. 750 views
Covalent bonding (with an electronegativity difference below 0.5) results when fluorine bonds withA. hydrogen B. potassium C.
1. 2 answers
2. 691 views
What is the electronegativity difference for a bond between potassium and iodine?A. 3.3 B. 0.4 C. 4.6 D.1.7
1. 2 answers
2. 2,849 views
Which of the following is true?A. Group 1 elements are more reactive than the group 2 elements because they have more valence to
1. 0 answers
2. 1,048 views
What type of reaction does the following equation represent?AgNO3 + NaCl ---> AgCl + NaNO3 A. Single-displacement reaction B.
1. 1 answer
2. 834 views
What type of reaction does the following equation represent?AgNO3 + NaCl ---> AgCl + NaNO3 A. Single-displacement reaction B.
1. 2 answers
2. 942 views
What type of reaction does the following equation represent?AgNO3 + NaCl ---> AgCl + NaNO3 A. Single-displacement reaction B.
1. 3 answers
2. 2,143 views
which of the following is true regarding the transition elements?A. Multiple oxidation states resulting from the involvement of
1. 2 answers
2. 1,543 views
which pairing below does not correctly match the scientist with the contribution to the understanding of the atomA. Proust and
1. 1 answer
2. 836 views
_____ was responsible for first grouping elements into triads based on similar properties.A. Döbereiner B. Moseley C. Dalton D.
1. 1 answer
2. 724 views
Which of the following statements correctly describes energy levels?A. Electrons can never move to a higher or lower energy
1. 1 answer
2. 993 views