Answers
Answer:
3 is c but im unable to see the 2nd questions picture
Explanation:
Related Questions
If two atoms are the same element, which statement can never be true?
1: they can have different number of protons.
2:they can have different number of electrons.
3:they can have different number of neutrons
Answers
Answer:
The answer is number 3: They can have different number of neutrons
Explanation:
Which of the following best describes the change in Antarctic temperature from about 440,000 years ago to about 340,000 years ago?
A
The temperature increases by about 10 S
B
The temperature decreases by about 8°C.
С
The temperature increases by about 12°C and then decreases by about 12°C.
D
The temperature decreases by about 10°C and then increases by about 12°C.
Answers
Answer: С . The temperature increases by about 12°C and then decreases by about 12°C.
Explanation:
Temperatures around the world have been on the rise since the Industrial revolution as humans clog the planet with Carbon Dioxide and other pollutants. This had led to a rise in temperatures that has seen ice levels fall and sea levels rise around the world.
Temperature fluctuations on the other hand are not a new thing. Studies show that in Antarctica temperatures from about 440,000 years ago to about 340,000 years ago increased by 12°C and then decreased by about 12°C.
Answer:
C. The temperature increases by about 12°C and then decreases by about 12°C.
Explanation:
The attached shows ice core data that indicates the time period of interest was about the period of one full cycle of climate change. Temperature went up, then went down again to about its original level. The range of change was on the order of 12 °C.
20 POINTS A group of students is conducting a density experiment with two blocks. Block 1 has more mass and less volume than Block 2. Based on this information, the student can correctly conclude that *
both blocks have densities less than water's density
both blocks have densities greater than water's density
Block 1 has a higher density than Block 2
Block 1 has a lower density than Block 2
Answers
Answer:
Block 1 has a higher density then block 2
Explanation:
Answer:
Yep, the correct answer is C. Block 1 has a higher density than block 2.
Explanation:
Fill in the blank... spelling counts.
Speed is the ______ something travels divided by the _____ It takes to travel that dinstance.
Answers
Answer:
[tex]speed = \frac{distance}{time}[/tex]
A hypothesis must be testable. Which hypothesis is testable? *
Ablue is the best color.
BSummer is nicer than fall.
CDogs are better than cats.
DA beagle can jump higher than a Persian cat.
Answers
the answer is D because can be tested the others ones is opinion
please mark me as brainliest
Which element is a gas?
A.Br
B.C
C.B
D.Be
Answers
Answer:
A.Br
Explanation:
Bromine is the only gas from the choices provided. It belongs to the group of halogens, group 7.
It has atomic number of 35 and it belongs to the p-block on the periodic table.
C is carbon and carbon is a solid matter B is boron and boron is a metalloid Be is beryllium and silvery white metalOnly Bromine is the gas from the given choices. It is fuming liquid and when exposed, it becomes gaseous.
The water cycle would not be possible without ______ and ________.
Options
1. evaporation; condensation
2.gravity; sun
3.precipitation; rain
4.gravity; precipitation
Answers
Answer:
I think it's 4
Explanation:
but I don't really remember the water cycle
Chemical equation to show cdso4 dissolves in water
Answers
no se bb si quieres salimos tu sabes
Liquid hexane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water . Suppose 17. g of hexane is mixed with 101. g of oxygen. Calculate the maximum mass of carbon dioxide that could be produced by the chemical reaction. Be sure your answer has the correct number of significant digits.
Answers
Answer:
52g of carbon dioxide
Explanation:
Liquid hexane + gaseous oxygen --> Carbon dioxide + gaseous water
The balance chemical equation is given as;
C6H12 + 9O2 --> 6CO2 + 6H2O
From the stochiometry of the reaction;
1 mol of hexane (86g) would consume 9 mol of oxygen (144g) to form 4 mol of carbon dioxide (264g)
The limiting reactant in this equation is hexane as it would run out before oxygen. This means hexane determines how much of the carbon dioxide is formed.
86g of hexane = 264g of crbon dioxide
17g of hexane = xg of carbon dioxide
x = 17 * 264 / 86 = 52g of carbon dioxide
What is the percent yield for the reaction below when
705.0 g SO2 and 80.0 g 02 produce 586.0 g S03?
2802(g) + O2(g) → 2503(9)
Answers
Answer:
Percent yield of reaction is 150%.
Explanation:
Given data:
Percent yield = ?
Actual yield of SO₃ = 586.0 g
Mass of SO₂ = 705.0 g
Mass of O₂ = 80.0 g
Solution:
Chemical equation:
2SO₂ + O₂ → 2SO₃
Number of moles of SO₂:
Number of moles = mass/ molar mass
Number of moles = 586.0 g/ 64.1 g/mol
Number of moles = 9.1 mol
Number of moles of O₂:
Number of moles = mass/ molar mass
Number of moles = 80.0 g/ 32g/mol
Number of moles = 2.5 mol
Now we will compare the mole of SO₃ with O₂ and SO₂.
SO₂ : SO₃
2 : 2
9.1 : 9.1
O₂ : SO₃
1 : 2
2.5 : 2×2.5 = 5
The number of moles of SO₃ produced by oxygen are less it will limiting reactant.
Theoretical yield of SO₃:
Mass = number of moles × molar mass
Mass = 5 mol × 80.1 g/mol
Mass = 400.5 g
Percent yield of reaction:
Percent yield = actual yield / theoretical yield × 100
Percent yield = 586.0 g/ 400.5 g× 100
Percent yield = 1.5× 100
Percent yield = 150%