Answer:
Explanation:
The pH scale goes from 0 to 14, where pH 7 is neutral. If the pH is above 7, the water is basic; if it is below 7 the water is acid. The optimum pH for pool water is 7.4, since this is the same as the pH in human eyes and mucous membranes. A pH of 7.4 also gives good chlorine disinfection.
Region where electrons are located within an atom, what is it??
Answer:
Electron shells surrounding the nucleus.
Calculate the number of moles of MgBra in 500 mL of a 0.80 M solution.
O 4.0 mol
O 0.040 mol
O 40 mol
O 0.40 mol
Answer:
0.40mol
Explanation:
M = n/V
n= VM
500mL is 0.5L
n = (0.5)(0.80)
n = 0.40mol
!!!!!!
A 68g bar of gold is cut into 3 equal pieces. How does the density of each piece compare to the density of the original gold bar?
Answer:
22.6666666666666666 and so on
Explanation:
68÷3
Answer:
The right answer 22.6666666667
Explanation:
68÷3 the right one
HELP ME PLEASE ITS MY LAST LESSON
Answer:
Arcuate: A fan-shaped delta, bowed or curved.
Cuspate: V-shaped delta.
Bird-foot: Outstretched claws delta
Inverted: The narrow end of delta, or river delta.
Waves: Large or regular shaped waves delta.
Tires: Round shaped delta
River estuary: A landform deposited by sediment
Explanation:
If a girl says that she doesn't like you but she gives you her number, does that mean she likes you?
Answer:
she could be lying about liking you or just want to be friends just ask
Which choice accurately describes what light is?
Answer:
If I think this is the same question then the answer is "scientists still debate this"
Explanation: First of all I just took the test. and second light can be both a particle and a wave because of quantum mechanics, I believe einstein came up with the idea.
draw the major and minor product when the following alkyl halide is heated with sodium ethoxide in ethanol. you may neglect cis-trans isomerism of the products when answering this question. if there is only one product, click no reaction for the minor product.
The major product is 3-methyl-2-pentene and the minor product is 2-ethyl-1-butene.
The alkyl halide shown is 3-bromo-3-methyl pentane. We can see that it is a tertiary alkyl halide. The proportion of products formed during the reaction are determined by Markovnikov rule.
The two products of this reaction are; 3-methyl-2-pentene and 2-ethyl-1-butene. The major product is 3-methyl-2-pentene because it is formed from a more stable carbocation intermediate. 2-ethyl-1-butene is the minor product.
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which groups of the modern periodic table contain elements that are classified as metalloids
Answer:group 4 and 5
Explanation: it is because they are the smallest class of elements containing only 6 elements
How can a chemical reaction be sped up?Select from the drop-down menu to correctly complete the statement.
Add a ___ that is unaffected by a reaction.
A:Catalyst
B:Coefficient
C:Product
Answer: Catalyst
Explanation: it speeds it up lol but basically the catalyst helps speed up the chemical reaction by reducing the activation energy or changing the reaction machenism/
Answer:
The answer is A. Catalyst
True or false: A compound containing one or more oxygen atoms is not necessarily capable of forming hydrogen bonds between its molecules.
Answer:
false
Explanation:
I think it would help you out
S = AD/AT
Solve for "AD"
Answer:
AD=S×ATExplanation:
the question is solving for AD if s=AD/AT; THEN S/1=AD/AT by cris cross multiplication AD=S×AT3.01 x 1023 atoms Na
Answer:
3,079.23
Explanation:
3. How many grams of magnesium ion are in 155.0 grams of Mg3P2?
Answer:
83.82 g of magnesium ions.
Explanation:
We want to determine the mass of magnesium ions in 155.0 grams of magnesium phosphide (Mg₃P₂).
We can convert from grams of Mg₃P₂ to moles of Mg₃P₂, moles of Mg₃P₂ to moles of Mg, and moles of Mg to grams of Mg.
Find the molecular weight (molar mass) of magnesium phosphide:
[tex]\displaystyle \begin{aligned}\text{MW}_\text{Mg$_3$P$_2$} &= \left(3(24.31)+2(30.97)\right) \text{ g/mol} \\ \\ &= (72.93 + 61.94) \text{ g/mol} \\ \\ &= 134.87 \text{ g/mol}\end{aligned}[/tex]
The molecular weight of magnesium is 24.31 g/mol*.
From the chemical formula, we can see that there are three moles of magnesium for every one mole of magnesium phosphide.
Hence, multiply initial amount with known ratios:
[tex]\displaystyle \begin{aligned} &155.0 \text{ g Mg$_3$P$_2$} \cdot \frac{1 \text{ mol Mg$_3$P$_2$}}{134.87\text{ g/mol}} \cdot \frac{3\text{ mol [Mg$^{2+}$]}}{1 \text{ mol Mg$_3$P$_2$}}\cdot \frac{24.31 \text{ g [Mg$^{2+}$]}}{1 \text{ mol [Mg$^{2+}$]}}\\ \\ & = 83.82 \text{ g [Mg$^{2+}$]}\end{aligned}[/tex]
In conclusion, there are 83.82 grams of magnesium ions in 155.0 grams of magnesium phosphide.
*Because the magnesium ions in magnesium phosphide have two less electrons, its molecular weight will indeed be lower. However, due to the extremely small size of an electron (1/2000th of a proton), the difference in mass is insignificant.
Compare amplitudes, wavelengths, and frequencies of waves
Answer this question for me? Marking brainliest, five stars, and a thank you! You also get points!
Answer:
The answer is option b.
Explanation:
Amplitude is the distance apart each wave is.
Help Asap for Brainlist
Answer:
3rd option
Explanation:
Can someone help me on this
Answer:
V = volume, usually in Litres
n = number of moles, in mol
R = the gas constant, which should be 8.33 J*K /mol
T = is the temperature, but in kelvin (if its in Celcius, you convert it)
Asap help for Brainlist
Answer:
d
Since there are 6 electrons and it's neutral, that means there are also 6 protons to balance it out. They said there's 6 neutrons. The atomic mass is the total of protons and neutrons so 6+6=12
Analyze how humans use technology to store (potential) and/or use (kinetic) energy.*
Science btw
Human devices use potential energy to store energy, whereas kinetic energy is potential energy in motion. Both types of energies can be measured in Joules (J).
Human devices generate and use different sources of energy, which can be classified into renewable sources (e.g., solar, hydraulic, winds, etc) and non-renewable sources (e.g., nuclear energy) of energy.
For example, a hydroelectric power plant transforms the potential energy stored in water reservoirs (e.g., a lake) into mechanical energy (a type of kinetic energy) when this energy is released from the water reservoir and flows through a turbine.
Subsequently, this type of kinetic energy is then used to generate electricity.
On the other hand, a nuclear power plant uses the potential energy that is stored within the nuclei of atoms to produce kinetic energy by a process known as nuclear fission.
This process (nuclear fission) releases energy in the form of heat (i.e., thermal energy).
Subsequently, this type of kinetic energy (heat) is used to generate steam, which then moves turbines to generate mechanical energy and finally generates electricity.
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Which statement is a chemical reaction?
A compound is crushed into fine powder.
O Atoms break apart into even smaller Aarticles.
O
Electron bonds break and reattach to other atoms
O Molecules move faster.
Answer:
Electron bonds break and reattach to other atoms
Explanation:
Most chemical reactions involve the breaking of bonds
I need help please! Describe how distillation works using the terms boiling and condensation?
Answer:
it boils a liquid to create condomsation
Explanation:
Answer:
Distillation refers to the selective boiling and subsequent condensation of a component in a liquid mixture. It is a separation technique that can be used to either increase the concentration of a particular component in the mixture or to obtain (almost) pure components from the mixture. The process of distillation exploits the difference in the boiling points of the components in the liquid mixture by forcing one of them into a gaseous state.
Explanation:
In a lab, students collected 64g of SO2 and 46g of sodium. What was the original amount of Na2SO4 present?
Answer:
127889
i think
Explanation:
A baseball that is moving through the air has ________ energy.
Answer:
Kinetic
Explanation:
Kinetic energy is the energy of motion.
Answer:
kinetic energy because of its motion
Why are compounds, such as NaCl, more stable than the elements that make them up?
Answer:
Explanation:
Why are compounds, such as NaCl, more stable than the elements that make them up?
the driving force for chemical reaction is that elements and compounds wil react until they produce more stable matter,
Na metal and Cl2 are very reactive. When they react with each other they become more stable as the Na+ and Cl− ions
the outer electron configuration of an alkali metal has:
Answer:
one electron
Group 1A elements are the alkali metals and all have one electron in the outermost energy level because their electron configuration ends in s1.
Explanation:
Answer:
1 electron
Explanation:
they are reactive becasue they only have one electron.
The following gases were bubbled through water, which of the gases is most likely to dissolve and why?
a. CO2
b. CH4
C.PH
d. N2
Solubility refers to the ability of substances to dissolve in a solvent. Of the gases listed here, that which would most likely dissolve in water is;
a. CO2Carbon dioxide is a gas that has a very high solubility in water. When bubbled through water, 99% of the gas dissolves while 1% of the gas comes off as carbonic acid.
The solubility of carbon dioxide increases with an increase in pressure and decreases with an increase in temperature.
Therefore, option A is correct.
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The most commonly used commercial method to extract delta-9-tetrahydrocannabinol (THC) from the cannabis plant material is by:
Answer:
using liquid carbon dioxide to produce oils or other forms.
Explanation:
Organisms that reproduce sexually have offspring with greater variety. Which statement best explains this characteristic?
A. The offspring get DNA from two parents, and it mutates regularly.
B. The offspring get DNA from two parents, and it combines randomly.
C. The offspring get DNA from one parent, and it mutates regularly.
D. The offspring get DNA from one parent, and it combines randomly.
Organisms that reproduce sexually have offspring with greater variety because: B. The offspring get DNA from two parents, and it combines randomly.
Reproduction refers to a biological process through which living organisms (parents) mate to produce offspring.
Basically, there are two (2) main types of reproduction and these include;
Asexual reproduction.Sexual reproduction.During sexual reproduction, parent organisms produce offspring with greater variety because the genetic material of their parents are randomly combined to produce genetically-diverse offspring.
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Organisms that reproduce sexually have offspring with greater variety as a
result of offspring get DNA from two parents, and it combines randomly.
The DNA gotten from the daughter cells during meiosis involves the
production of unique cells from the parent cells
This is usually done by the daughter cells obtaining DNA from both parent
and combining randomly. It doesn't mutate regularly as mutation represents
defects which occurs in cells.
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8. How is the cell wall different from the cell membrane?
O The cell wall is only in plant cells
The cell wall is in animal and plant cells
The cell membrane provides protection
All cells only have a cell membrane
How many atoms of potassium make up 2 moles?
Answer:
1.2044 × 10²⁴
Explanation:
1 mol = 6.022 × 10²³
2 mol = 2 × 6.022
How you can minimize human impact on the environment?
