Studies have shown that video games can affect the brain negative
Answers
Answer:
Well yea that is true but it can also benefit you in a few ways.
Explanation:
Video games can sometimes benefit you because like it could help you lose weight ans that is proven by research because you playing it would make you eat less and sometimes helps your brain be more active.
Related Questions
Calculate the volume in liters of a 0.0026 mol/L copper(II) fluoride solution that contains 800. mg of copper(II) fluoride . Round your answer to significant digits.
Answers
The volume in liters of the given copper(II) fluoride solution is 30.3 L.To calculate the volume in liters of the given copper(II) fluoride solution.
We need to use the formula:
moles = concentration x volume
First, we need to convert the mass of copper(II) fluoride from milligrams to grams:
800. mg = 0.8 g
Next, we can calculate the number of moles of copper(II) fluoride:
moles = 0.0026 mol/L x V (where V is the volume in liters)
moles = (0.0026 mol/L) x V
We can now set up an equation to solve for V:
(0.0026 mol/L) x V = 0.8 g / 101.55 g/mol (the molar mass of copper(II) fluoride)
Simplifying the equation, we get:
V = (0.8 g / 101.55 g/mol) / 0.0026 mol/L
V = 30.29 L
Finally, we round our answer to three significant digits, giving us:
Volume = 30.3 L
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Each electron can be represented by 4 quantum numbers. The two electrons in the outermost level of strontium are designated at 5 s . How many quantum numbers would these two electrons have in common
Answers
Explanation:
They are both in shell 5 and subshell s.
Since s only has 1 orbital, they also have the same orbital number.
But they have different magnetic spins.
Hence 3 out of 4 quantum numbers are in common.
what might happen to atoms if force didn't exist
Answers
Answer: If the strong force didn't exist, there would be nothing but hydrogen and neutrons floating in space.
Explanation:
Which of the following is NOT a type of nuclear decay? *
Alpha
Beta
Gamma
Delta
Answers
Answer:
Delta
Explanation:
Delta is a not a type of nuclear decay. Most times, the delta sign is used to denote a change between the initial and final states of a reaction.
There are three main types of nuclear decay which are:
Alpha decayBeta decay Gamma decayAlpha decay results in the formation of alpha particles. Beta decay produces electron like particles. Gamma decay produces gamma radiations.Which of the following correctly lists the isoelectric pH's of asp, asn, and arg from lowest to highest?
a) D N R
b) D R N
c) R N D
d) R D N
e) N R D
f) N D R
Answers
The correct answer is N D R, lists the isoelectric pH's of asp, asn, and arg from lowest to highest
Isoelectric pH is the pH value at which a molecule does not have a net electric charge. At this pH, the amino acid's zwitterionic form has an equal number of positively and negatively charged ions. Amino acids with acidic side chains, such as aspartate (asp), have lower isoelectric pHs, whereas amino acids with basic side chains, such as arginine (arg), have higher isoelectric pHs.Asn is an abbreviation for Asparagine, and R is an abbreviation for Arginine. Aspartate and asparagine are two amino acids with a side chain of carboxylic acid. The side chain of arginine has a positive charge. As a result, Asp and Asn have low isoelectric pHs, whereas Arg has a high isoelectric pH. As a result, the isoelectric pH's of Asn, Asp, and Arg are N, D, and R, respectively. Therefore, the correct answer is N D R.
The isoelectric pH's of Asn, Asp, and Arg are N, D, and R, respectively. Therefore, the correct answer is N D R.
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Which of the following minerals effervesces (produces a bubbling, fizzing reaction) in hydrochloric acid? Group of answer choices gypsum quartz halite calcite
Answers
The minerals effervesce (produces a bubbling, fizzing reaction) in hydrochloric acid is calcite. The correct option is D, calcite.
What is calcite?Calcite is a mineral that is very hard, and highly reactive.
It is present in many colors, white, yellow, orange, red, green, and blue.
In Ancient Egypt, calcite was used to carve many things, such as bast, alabaster, etc.
Thus, the correct option is D, calcite.
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"dairy cattle management question
Typical DMI is ________% during the dry period
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Typical DMI (Dry Matter Intake) for dairy cattle during the dry period is around 2.0 to 2.2% of their body weight. This means that a dairy cow will consume approximately 2.0 to 2.2% of its body weight in dry feed each day during the dry period.
Dairy cows are not producing milk during the dry period, which is the time frame of about 60 days prior to calving, and are instead getting ready for the upcoming lactation cycle. Their dietary needs at this period are different from those they have when they are actively making milk.
There are a number of reasons why DMI is lower during the dry season. First of all, during the dry phase, the cow's udder involutes (regresses) and gets ready for the impending lactation. The cow's metabolic activity decreases as a result, and she requires less energy.
Second, during the dry season, the cow's rumen capacity drops. Due to the growing calf and the shrinking amount of the udder, the capacity of the rumen, the main component of the cow's stomach, has been diminished. The amount of feed that the cow can eat is constrained by the small rumen space.
The cow's physiological state during the dry period and fluctuations in hormone levels can also have an impact on the cow's appetite. A decrease in feed intake may result from hormonal changes and rumen motility changes that the cow may encounter.
It is crucial to keep in mind that the precise DMI during the dry period can change depending on elements including cow genetics, physical condition, and management techniques. For dairy farmers to maintain ideal cow health and get their animals ready for a successful lactation phase, it's critical to track each cow's consumption and modify feeding techniques accordingly.
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PLEASE HELPP!!!
PLEASE HELP!!!
Write the sentences in your copybook and draw a line through one of the words in
bold to complete each of these sentences about alkali metals correctly.
Alkali metals generally become more / less dense going down the group.
The melting and boiling points of alkali metals increase / decrease down the group.
The softness of alkali metals increases / decreases going down the group.
The speed with which alkali metals react with oxygen increases / decreases going
down the group.
Answers
Answer:
vahshahhsjajaiaoakkakakaaosos
A jogger runs 10 km East. She then stops and heads back west for 6 km. What is the jogger's distance? What is the jogger's displacement?
Answers
Answer:
distance is 16m
displacement 4m east
Question (a)Calculate the empirical formula of a compound that has the following composition by mass. 29.0% Na, 40.5% S, O=30.4%
Answers
The first step to answer this question is to assume that the given percents are masses.
Then, convert these masses to moles using the corresponding molar mass:
\(\begin{gathered} 29.0gNa\cdot\frac{1molNa}{22.98gNa}=1.26molNa \\ 40.5gS\cdot\frac{1molS}{32.065gS}=1.26molS \\ 30.4gO\cdot\frac{1molO}{15.999gO}=1.9molO \end{gathered}\)Divide each result by the least result (1.26mol):
\(\begin{gathered} \frac{1.26mol}{1.26mol}=1 \\ \frac{1.26mol}{1.26mol}=1 \\ \frac{1.9mol}{1.26mol}=1.5 \end{gathered}\)Since not all of these are whole numbers, we have to multiply them times 2:
\(\begin{gathered} 1\cdot2=2 \\ 1\cdot2=2 \\ 1.5\cdot2=3 \end{gathered}\)These numbers are the subscripts of each element in the empirical formula.
It means that the empirical formula of this compound is:
\(Na_2S_2O_3\)What is a limitation for using solar energy to meet global energy needs?
Answers
Answer:
The sun provides more than enough energy to meet the whole world's energy needs, and unlike fossil fuels, it won't run out anytime soon. As a renewable energy source, the only limitation of solar power is our ability to turn it into electricity in an efficient and cost-effective way.
a 50.00 ml sample of water is titrated with 0.0200 m hcl to the methyl orange end point. the titration requires 3.97 ml to reach the endpoint. calculate the total alkalinity expressed as mg caco3/l.
Answers
The total alkalinity expressed as mg CaCO₃/L is 158.86 mg CaCO₃/L.
To calculate the total alkalinity of the water sample expressed as mg CaCO₃/L, you can follow these steps:
1. Determine the moles of HCl used in the titration:
moles of HCl = (volume of HCl) × (concentration of HCl)
moles of HCl = (3.97 mL) × (0.0200 mol/L)
moles of HCl = 0.0794 mmol (Note: Convert mL to L by dividing by 1000)
2. Assume that the moles of HCl are equal to the moles of CaCO₃ since they react in a 1:1 ratio in the titration.
3. Calculate the mass of CaCO₃:
mass of CaCO₃ = (moles of CaCO₃) × (molar mass of CaCO₃)
mass of CaCO₃ = (0.0794 mmol) × (100.09 g/mol)
mass of CaCO₃ = 7.943 mg
4. Determine the total alkalinity expressed as mg CaCO₃/L:
total alkalinity = (mass of CaCO₃) × (1000 mL/volume of water sample)
total alkalinity = (7.943 mg) × (1000 mL / 50.00 mL)
total alkalinity = 158.86 mg CaCO₃/L
So, the total alkalinity of the water sample is 158.86 mg CaCO₃/L.
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What is the molecule that formed between B and F?
Answers
Answer:
Hydrogen bond strengths range from 4 kJ to 50 kJ per mole of hydrogen bonds. In molecules containing N-H, O-H or F-H bonds, the large difference in electronegativity between the H atom and the N, O or F atom leads to a highly polar covalent bond (i.e., a bond dipole).
Explanation:
What is a hydrogen bond?
What is a Metallic bond?
What is a Covalent bond?
What is an Electrovalent or Ionic bond?
WILL GIVE BRAINLIEST!!!
Answers
An electrovalent or ionic bond is a type of chemical bond that occurs between two atoms when one or more electrons are transferred from one atom to another. This results in the formation of two ions with opposite charges that are attracted to each other by electrostatic forces, forming an ionic bond.
Typically, an ionic bond occurs between a metal and a nonmetal. The metal atom loses one or more electrons to become a positively charged ion or cation, while the nonmetal atom gains one or more electrons to become a negatively charged ion or anion. For example, in the formation of sodium chloride (NaCl), sodium donates an electron to chlorine, forming Na+ and Cl- ions that are attracted to each other to form an ionic bond.
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How many molecules are in 0.23 moles of CaCl2?
A) 2.62 x 10^24 molecules of CaCl2
B)1.39 x 10^23 molecules of CaCl2
C) 2.61x 10^23 molecules of CaCl2
D) 3.82 x 10^-25 molecules of CaCl2
Previous
Answers
Answer:
1.39 × 10²³ molecules of CaCl₂
Explanation:
Given data:
Number of moles of CaCl₂ = 0.23 mol
Number of molecules = ?
Solution:
Avogadro number:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ molecules
0.23 mol × 6.022 × 10²³ molecules / 1mol
1.39 × 10²³ molecules
A solution prepared by dissolving 180.0 mg of a sugar (a molecular compound and a nonelectrolyte) in 1.00 g of water froze at -1.86°C. What is the molar mass of this sugar? The value of Kf is 1.86°C/m._______ g/mol
Answers
Answer:
180 g/mol.
Explanation:
What is given?
ΔT = [0 - (- 1.86 )] °C = 1.86 °C.
i = 1 (for a nonelectrolyte).
Kf = 1.86 °C/m.
Step-by-step solution:
To solve this problem, we have to use the boiling point elevation formula, which is the following:
\(\Delta T=i\cdot m\cdot K_f.\)Where ΔT is the change in boiling point, i is the Van't Hoff factor, m is the molality of solution, and Kf is the molal boiling point constant.
Let's calculate the molality with the given data:
\(m=\frac{\Delta T}{i\cdot K_f}=\frac{1.86\text{ \degree C}}{1\cdot1.86\text{ }\frac{\degree C}{m}}=1\text{ m.}\)1 m is the same that 1 mol/kg. As we have 1.00 g of water and 180.0 mg of the sugar, we can multiply 1 mol/kg by the mass of water. Remember that 1 kg equals 1000 g, so 1.00 g is the same that 0.001 kg:
\(1\text{ }\frac{mol}{kg}\cdot0.001\text{ kg=0.001 mol.}\)Remember that the units of the molar mass is in g/mol, and 1 g equals 1000 mg, so 180.0 mg is the same that 0.18 g. If we divide 0.18 g by 0.001 mol, we will obtain the molar mass of the sugar, which would be:
\(\begin{gathered} Molar\text{ mass=}\frac{0.18\text{ g}}{0.001\text{ mol}}, \\ Molar\text{ mass=180}\frac{g}{mol}. \end{gathered}\)The answer would be that the molar mass is 180 g/mol.
india 's only active volcano is on _______
a) andaman island
b) Saudi Arabia
c) peninsula
Answers
The answer to your question would have to be a.
Explain why silk and wool are more easily dyed with azo dyes than other fabrics like nylon or cotton.
Answers
Silk and wool are more easily dyed with azo dyes than other fabrics like nylon or cotton because they are polypeptides.
Polypeptides or polymers made of amino acids are what makeup wool and silk. Natural protein fibers like wool and silk, synthetic polyamide fibers like nylon, and, to a lesser extent, acrylic fibers and blends of these fibers, are typically dyed with acid dyes. They are applied to these fibers from a dyebath under acidic or neutral conditions, thus their name. The azo group is the most widely used chromophore in acid dyes. When an ionic bond is formed between the protonated amine group of the fiber and the acid group of the dye, acid dyes that are anionic and soluble in water are applied to wool, silk, and nylon
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Give any two reasons why we need to separate things in our daily life.
Answers
Answer:
1: They could get mixed up and then it messes other stuff up, 2: It keeps you orgnized
Explanation:
The pH of a solution can be determined using the formula pH=−log[H
+
], where H
+
is the hydrogen ion concentration in the solution. a. The hydrogen ion concentration of a particular brand of fruit juice is 0.0003 mol/L. Determine the pH of the solution, to the nearest tenth. ( 1 mark) b. A tomato has a pH of 3.0. Algebraically determine the hydrogen ion concentration of this solution. (2 marks)
Answers
(a)The pH of the fruit juice solution is approximately 3.5. (b) The hydrogen ion concentration of the tomato solution is 0.001 mol/L.
(b)The hydrogen ion concentration of the tomato solution is 0.001 mol/L.
(a). The hydrogen ion concentration of the fruit juice is 0.0003 mol/L. We can determine the pH of the solution using the formula pH = -log[H⁺].
pH = -log(0.0003)
pH ≈ -log(3 × 10⁻⁴)
Using a calculator, we can calculate the logarithm:
pH ≈ -(-3.5229) (rounded to the nearest tenth)
pH ≈ 3.5
Therefore, the pH of the fruit juice solution is approximately 3.5.
(b). A tomato has a pH of 3.0. We can determine the hydrogen ion concentration of this solution by rearranging the formula pH = -log[H⁺] to solve for [H⁺].
[H⁺] = 10(-pH)
[H⁺] = 10⁻³
[H⁺] = 0.001 mol/L
Therefore, the hydrogen ion concentration of the tomato solution is 0.001 mol/L.
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The mass of 10 moles of ammonia is 17 grams true or false
Answers
Answer:
False, 17.03*10 = 170.3g not 17
at a given temperature, an unknown gas effuses through a porous barrier at a rate that is 0.849 times that of neon gas (ℳ
Answers
The molar mass of the unknown gas is approximately 47.007 g/mol.
To solve this problem, we can use Graham's law of effusion, which states that the rate of effusion of a gas is inversely proportional to the square root of its molar mass.
Let's assume the molar mass of the unknown gas is M_2. According to the problem, the rate of effusion for argon (M_1) is 0.849 times that of the unknown gas:
Rate of argon (M_1) / Rate of unknown gas (M_2) = 0.849
By rearranging the equation, we get:
Rate of unknown gas (M_2) = Rate of argon (M_1) / 0.849
Since the molar mass of argon (M_1) is given as 39.948 g/mol, we can substitute the values into the equation:
Rate of unknown gas (M_2) = 39.948 g/mol / 0.849
Calculating this expression gives us the molar mass of the unknown gas:
M_2 = 47.007 g/mol
Therefore, the molar mass of the unknown gas is approximately 47.007 g/mol.
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The molar mass of the unknown gas is approximately 27.17 g/mol.
At a given temperature, the rate at which a gas effuses (passes through a small opening) can be determined by using Graham's Law of Effusion. Graham's Law states that the rate of effusion of a gas is inversely proportional to the square root of its molar mass. In this case, we are comparing the effusion rates of an unknown gas and neon gas.
The given information states that the rate of effusion of the unknown gas is 0.849 times that of neon gas. Let's denote the rate of effusion of the unknown gas as r_unknown and the rate of effusion of neon gas as r_neon.
We can express this relationship mathematically as:
r_unknown = 0.849 * r_neon
Now, Graham's Law tells us that the rate of effusion is inversely proportional to the square root of the molar mass. Let's denote the molar mass of the unknown gas as M_unknown and the molar mass of neon gas as M_neon.
Using Graham's Law, we can write:
r_unknown / r_neon = sqrt(M_neon / M_unknown)
Since we know that r_unknown = 0.849 * r_neon, we can substitute this value into the equation:
0.849 * r_neon / r_neon = sqrt(M_neon / M_unknown)
Simplifying the equation:
0.849 = sqrt(M_neon / M_unknown)
To solve for M_unknown, we need to isolate it on one side of the equation. Squaring both sides of the equation, we get:
0.849^2 = M_neon / M_unknown
M_unknown = M_neon / 0.849^2
Now, the molar mass of neon gas (M_neon) is approximately 20.18 g/mol. Let's substitute this value into the equation:
M_unknown = 20.18 g/mol / 0.849^2
Calculating this value, we find:
M_unknown ≈ 27.17 g/mol
So, the molar mass of the unknown gas is approximately 27.17 g/mol.
Please note that the given information does not mention the temperature explicitly. However, the molar mass of a gas is constant at a given temperature. Therefore, we can use the given information to determine the molar mass of the unknown gas regardless of the temperature.
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Which diagram shows a pair of electrons that have opposite spins?
O1
1
个个
Answers
Answer:
the answer is half arrow
the by-product of photosythysis is
Answers
Answer: The by-product of photosynthesis is oxygen.
Explanation: The photosynthesis process is the process by which photoautotrophs convert light energy into chemical energy which can later be used to fuel the activities of organisms. The three important elements required for the photosynthesis process are Water, carbon dioxide and light. The product formed from this process, stored in the form of sugars, which are created from water and carbon dioxide. The by-product of the photosynthesis process is oxygen.
6CO2 + 6H2O → C6H12O6 + 6O2
Answer:
Oxygen
Explanation:
Plants don't have any use for oxygen and we get oxygen from plants
Why is reduced precipitation, rather than drought, the leading cause of limited water availability?
A)
Reduced precipitation is the cause of drought.
B)
Drought only impacts the supplies of groundwater.
C)
Water availability depends upon drought conditions.
D)
Drought only affects areas with vegetation.
E)
Precipitation limits the amount of water in many environments.
Answers
Answer:
A. Reduced precipitation is the cause of drought.
Explanation:
Reduced precipitation begins to insufficient water availability because water catch basins or tanks tend to dry out. When it drains out, people tend to start working and drying out the backup water sources and stored ones. Until such time, that the reservoirs of water will completely be dried out. And there will be no more water for them to use and there will be a drought.
hope this helps
Answer:
Option A
Explanation:
Precipitation generally refers to the source of water like rain ,snow If precipitation decreases the rain water coming decreasesWhich decreases the water level on earthThat's the main reason behind droughtHence option A is correct consider the diagram below
What does D represent?
O energy of the products
O energy of the reactants
O reactants, Q +R
O products, N +M
Answers
Begin walking at a brisk pace by pushing off of your heels onto your toes. After you feel warmed up (after 1 or 2 minutes), begin jogging at a slow pace (for 2 minutes). Next, run as fast as you can for 2 minutes. Slow down to a jog for 2 minutes. Slow down to a brisk walk for 2 minutes. Describes what? Question 1 options: Progressive walk Progressive Run Running Walking
Answers
Answer:
The answer is Progressive Run
Explanation:
I took the test and got it right <3
Brisk walking is the type of exercise that includes walking 3 miles in an hour at a faster speed than strolling. The situation describes the progressive run.
What is a progressive run?A progressive run is a type of aerobic and anaerobic exercise that benefits training and race management techniques.
The progressive run technique includes the easy and relaxing jog with a gradually increased running pace. This practice is used to overcome the second-half slow run issues.
Therefore, the situation depicts option B. progressive run.
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In which of the following reactions is mass and/or
charge not conserved?
A) H₂O → H+ + OH-
B) CIO2 + 2 H2O + 4e → Cl- + 4 OH-
C) H2SO4 + NaOH → Na2SO4 + H+ + 2 OH-
D) ZnCl + H₂O → ZnOH + H+ + Cl−
E) none of the above
Answers
Answer:
The answer is E) none of the above.
In all of the given reactions, mass and charge are conserved. The law of conservation of mass states that the mass of reactants must be equal to the mass of the products in a chemical reaction. The law of conservation of charge states that the total charge of the reactants must be equal to the total charge of the products.
In reaction A, the water molecule dissociates into a hydrogen ion (H+) and a hydroxide ion (OH-), but the total mass and charge are still conserved.
In reaction B, the reduction of CIO2 to Cl- is balanced by the oxidation of water to form OH-. The electrons and charge are conserved.
In reaction C, H2SO4 reacts with NaOH to form Na2SO4, H+ and OH-. The mass and charge are conserved.
In reaction D, ZnCl reacts with water to form ZnOH, H+ and Cl-. The mass and charge are also conserved.
Which statement describes the periodic table
Answers
Answer:
Periodic Table is a scientific model.
The following data was collected for a runner's speed: 4mi/hr, 3mi/hr, 6.9mi/hr, and 7mi/hr. Is this data precise
Answers
The data collected is not precise.
In science, we define precision as the degree to which scientific measurements yield results having close range of values.
A precise data set has values that are very close to each other.
In this case the values; 4mi/hr, 3mi/hr, 6.9mi/hr, and 7mi/hr are not close to each other.
Therefore, the data set is not precise.
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