Answer:
its B
Explanation:
not so sure but its reasonable for me
Answer:
B
Explanation:
Hail form as water droplets freeze to form chunks or balls of ice
Please give me Brainliest as I provided an explanation
Most elements occur in nature as a single isotope.
TRUE
FALSE
Answer:
false
Explanation:
because elements never exist in nature as single isotopes they are always combined
Answer:
FALSE
Explanation:
in the cases of three elements (tellurium, indium, and rhenium) the most abundant isotope found in nature is actually one (or two) extremely long-lived radioisotope(s) of the element, despite these elements having one or more stable isotopes.
a student observed the shape of the moon once every 7 days during the month of June. which of the following sets of drawings shows how the moons shape could have changed during the month of June?
Lipase is an enzyme that breaks down the fat in food molecules into smaller molecules. Which of the following best describes the function of lipase?
Multiple lines between two atoms in a covalent lewis dot diagram mean:
A That there are more atoms involved
B That multiple electrons are shared between the atoms
C That the atoms are not bonded
D That the bond is easier to break
A cube of zinc at 15.C is placed in contact with a cube of tin at 45. Which statement describes the initial flow of heat between the cubes? *
What is the result of excess nutrients (nitrates) in North Carolina waters?
A.Algae growth is high
B.Algae growth is low
C.Algae growth is moderate
Answer:
A. Algae growth is high
Explanation:
Substances that contains high concentration of nitrates, phosphates etc add nutrients to the water body. This is because organisms like ALGAE consider these compounds nutrients needed for their growth and development. The process whereby these nutrients becomes excessive in a water body is referred to as EUTROPHICATION.
Eutrophication of a water body i.e excessive nutrients like nitrates in a water body like the North Carolina waters being described in this question will lead to rapid and excessive growth of algal species. This increase in algal growth can cause the water body to be low in oxygen content and ultimately become inhabitable by living organisms.
5.Are pure solids included in equilibrium expressions? Explain your answer.
Answer:
Pure solids or liquids are excluded from the equilibrium expression because their effective concentrations stay constant throughout the reaction. The concentration of a pure liquid or solid equals its density divided by its molar mass.
Explanation:
Hope this helps!!!
Mole Conversion: How many moles in 45 grams of H2SO4
Answer:
0.45881381335
Explanation:
divide 45 by the molar mass of H2SO4
45/98.079
Answer:
0.45
Explanation:
divise
How many moles are in 150.0 grams of Fe2O3
Answer:
its 150 hope this helps
Explanation:
What is the number of grains of rice in the 40 mL sample? Show all of your work using dimensional analysis.
The number of grains of rice in the 40 mL sample : 880 grains
Further explanationGiven
from recorded data:
mass of 20 grains rice = 0.4 g
mass beaker = 29.5 g
mass beaker+rice=47.1 g
mass only rice = 17.5 g
Required
the number of grains of rice
Solution
Maybe if we use a digital scale with high resolution accuracy we can get the mass of 1 grain of rice
But we still use existing data
To determine the mass of rice in the beaker, we just need to find the difference between the mass of the beaker + rice - beaker, or we can set the scale to zero before we add rice to the beaker.
If we look at this difference, the mass of the rice in the beaker should be :
47.1-29.5 = 17.6 g
Since the data shows that 20 grains of rice mass 0.4 g, so 17.6 g of rice contains:
[tex]\tt 17.6~g\times \dfrac{20~grains}{0.4~g}=880~grains[/tex]
A soccer ball was kicked it had the mass of .42 kg and accelerated at 25m what is the force
A student repeats a reaction several times to test the effects of various
changes on the reaction rate. The data table shows the results. Based on
these results, how would decreasing the concentration of the reactants
change the reaction rate?
Conditions
Original
Higher concentration
Higher temperature
Metal added
Reaction Time (5)
10 seconds
5 seconds
5 seconds
5 seconds
A. More information is needed to determine what would happen to
the reaction rate.
B. Decreasing the concentration would increase the reaction rate.
C. Decreasing the concentration would decrease the reaction rate.
D. Decreasing the concentration would have no effect on the
reaction rate.
Answer:
C) Decreasing the concentration would decrease the reaction rate.
Explanation:
A.P.E.X
what is the chemical name for carbon?
name the process of separating into immiseible liquid?
Answer:
Decantation
Explanation:
Decantation is a process for the separation of mixtures of immiscible liquids or of a liquid and a solid mixture such as a suspension.
PLEASE HELP
In the equation 2KCIO3 → 2KC1 + 302, how many moles of oxygen are produced when 3.0 mol of KCIO3 decompose completely?
Moles of Oxygen produced : 4.5 moles
Further explanationA reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.
The reaction coefficient shows the mole ratio of the reactants and products
Reaction
2KCIO₃ → 2KCl + 30₂
moles of KCIO₃ = 3
From equation, mol ratio of KCIO₃ : O₂ = 2 : 3, so mol O₂ :
[tex]\tt mol~O_2=\dfrac{3}{2}\times 3=4.5[/tex]
Is there currently a cure for HIV
Answer:
No
Explanation:
There are vaccines, to prevent it, made by Dr. Fauci, but no cure
The chemical process in which small organic molecules called monomers bond together to form a chain is called A) production B) polymerization C technology D) modification
how many moles of aluminum are needed to produce 2.8 moles of aluminum chloride
Answer:
1.4 mol
Explanation:
that my i got i was doing for it
What do the two arrows in the diagram most likely represent?
O radiation
O photosynthesis
cellular respiration
Oenergy transfers
Why is a map considered a model?
Answer:
Every map is a representation of reality, thus a model in the broadest sense. Sometimes mapping is distinguished from modelling by stating that mapping is a simple representation of reality, while modelling is trying to cover more complexity in reality.
Explanation:
pls pls answer questions for chem final within 45 mins i will give brainliest
True or False Hydrogen is amable used to in limpa
Answer:
False
Explanation:
Answer:
false
Explanation:
false
using your personal feelings to explain or describe is being..
Answer:
deep ............................
Answer:
( A Heart) fragile clueless of what love is then one day... somebody comes, somebody comes and you get a feeling a feeling of happiness a feeling of pure love not like any crush! Then one day... you lose them, you lose them and they are gone at first you feel cold like a piece of you just left the person that mad you feel this joy! You were just having another normal day but then you met then after that day you were happy but that one person! That one person made you So happy if you lost them you cant imagine how you could go what was life Before. so the second they leave it feels like your heart lost a piece that could only be filled with love! over the days your'e heart starts to feel numb and feel so lost you wonder and wonder. ( The heart)
Explanation
Question 4
Calculate the nlass of 7.1 x 1024 formula units of magnesium hydroxide, Mg(OH),.
its me again this is how you find the answer. note: i dont have the periodic table to see the exact atomic mass to find the molar mass however this is the answer:
so the actual formula is Mg(OH) with a 2 as a subscript because there are 2 Mg. so with Mg(OH)2 the Molar mass is 58.32g/mol. 58.32 g/mol x 7.1x1024 = 4.1x1026g
If you help me quickly i will give you 100 point
Answer:
Ovary
Explanation:
The ovaries are organs that lie to the upper right and left of the uterus. They produce, store, and release eggs into the fallopian tubes in the process called ovulation
Multiple choice- fill in the blank
Thermal energy is the (blank)
1. average kinetic energy of the particles in an object
2. total energy of the particles in an object
3. total transitional kinetic energy of the particles in an object
And internal energy is the (blank)
1. average kinetic energy of the particles in an object
2. total energy of the particles in an object
3. total transitional kinetic energy of the particles in an object
Answer:
Thermal energy refers to several distinct physical concepts, such as the internal energy of a system; heat or sensible heat, which are defined as types of energy transfer; or for the characteristic energy of a degree of freedom in a thermal system, where is temperature and is the Boltzmann constant
Explanation:
My question is on the image
Answer:
Top left: RR Top right: Rr Bottom left: Rr Bottom right: rr
Explanation:
if both parents are heterozygous then the table will always look like this. the chances of the offspring being heterozygous are 50%. the offspring has a 25% chance of having two recessive traits and a 25% chance of having two dominant traits.
I need help, and fast, please.
Which landform explains the lack of cultural interaction between ancient China and ancient India? (4 points)
the Loess Plateau
the Chang River valley
the Gobi Desert
the Himalaya Mountains
Answer:
I had this question and it was the 4th one for me
Explanation:
Which statement best describes how an ionic bond forms?
The transfer of electrons forms strong bonds between ions.
The sharing of electrons forms strong bonds between ions.
The transfer of electrons results in repulsive forces between molecules.
The sharing of electrons results in attractive forces between molecules.
The transfer of electrons forms strong bonds between ions is the best
statement that describes ionic bond formation.
Ionic bond is also known as electrovalent bonding. It involves the transfer
of electrons from an element to another. This is done so as to enable the
elements achieve a stable configuration and formation of new compounds.
The ionic bonds formed are usually strong so as to prevent the elements
from losing their stable configuration.
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