Non-metals tend to combine to form molecular compounds.
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B) compound
C) mixture
D) solution
B) compound is a pure substance
Further explanation
A pure substance can be an element or compound.
The element is a single substance that cannot be broken down anymore or the simplest substance.
While the compound is a pure substance that is formed from a combination of two or more elements through chemical reactions and has a constant chemical ratio.
A mixture is a combination of two or more single substances. The properties of the mixture component are not lost / unchanged as in compounds.
The mixture can be divided into a homogeneous mixture if the composition / ratio of each substance in the mixture is the same and heterogeneous mixture if the ratio of the composition of the substances is not the same (can be varied) in each place.
Mixtures can also be divided into solutions, suspensions and colloids based mainly on the size of the particles
alloy is a mixture of elements that have metal properties
Compounds are represented in chemical formulas which can be separated into their constituent elements by chemical processes
can be separated by physical or mechanical means, the composition can be changed depending on the proportion of pure substances that form it
Solution is: a mixture of two or more substances consisting of a solute and a solvent. The particle size of the solution is very small, less than 1 nm.
A heterogeneous mixture
a homogeneous mixture
an example of a physical change
1 mol of Lead weighs more than 1 mol of Gold because lead has a higher atomic mass (207.2 g/mol) compared to gold's atomic mass (197.0 g/mol). Option D. is correct.
Consider the atomic masses of both gold and lead, as the question involves comparing a mole of each. Importantly, the molar mass of any substance is numerically equivalent to its atomic weight in Atomic Mass Units (amu). The atomic mass of gold is approximately 197.0 amu while lead has an atomic mass of around 207.2 amu.
Therefore, a 1 mol of Lead (207.2 g) would weigh more than 1 mol of Gold (197.0 g).
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When you are discussing the concentration of solution, you are discussing how many particles there are in a given amount of solvent. You are comparing. If there is more solute in a beaker of solvent, then it is highly concentrated. If there is less solute in a beaker of the same amount of solvent, then it is less concentrated or more dilute. The terms diluted and concentrated are related to each other. These words are used to compare certain solutions to each other, since there is nothing like numbers, these words are relative to one another.
b. disease limits
c. carrying capacity
d. mutation rate
Answer;
Mutation rate
-Mutation rate is not a difference between a population showing exponential growth and a population showing logistic growth.
Explanation;
-When the resources are unlimited, populations exhibit exponential growth, resulting in a J-shaped curve and when the resources are limited, populations exhibit logistic growth.
-The carrying capacity is the maximum population size of the species that the environment can sustain indefinitely, given the food, habitat, water, and other necessities available in the environment. It affects the size of population and thus has an effect on both exponential and logistic growth.
-Food limits and disease limits are also other factors that may determine the population size in a biological ecosystem.
b. 10 grams
c. 20 milligrams
d. 50 grams
Answer: 20 milligram per kilo gram of food.
Explanation:
FDA: Food and drug Administration
According to FDA, product labelled as gluten free must contain 20 parts per million gluten. This also means that 20 milligram of gluten per kilo gram of food. or we can also say that 20 milligrams of gluten per 35.27 ounce of food.
Hence,the correct answer is option (c).
H20(g)
1. Balance the equation above by putting coefficients into each blank space.
1C5H12+ 8O2----- 5CO2+ 6 H2O (this is what I got)
2. How many atoms of oxygen are in 144 grams of pentane?
step 1: 144g of C5H12*(1mole/72.17)= 1.995moles of C5H12
step 2: 1.995moles of C5H12*(8moles of O2/1mole of C5H12)= 15.962 moles of O2
step 3: 15.962 moles of O2*(6.02*10^23 atoms of O2/1mole of O2)= 9.609*10^24 atoms of O2 (I don't know if I did this right)
3. How many atoms of oxygen are in 192 grams of carbon dioxide gas?
step 1: 192 grams of CO2 *(1mole of CO2/44.01grams of CO2)= 4.363 moles of CO2
step two: 4.36moles of CO2* ( 1 mole of O2/1mole of CO2)=
step 3: 4.363* (6.02*10^23) = 2.627*10^24 atoms of O2 (I don't know if this is correct.
4. A) CIRCLE ONE: True or False:
reactant you begin with fewer grams of is your limiting reactant.
B) If 32 g of oxygen gas and 32 g of pentane are combined, how much water will be produced, in moles? (Use your reaction from the top of the first page)
NEED HELP ASAP THANK YOU!!!