Answer:
The temperature at which each bean is kept
Explanation:
Independent variable is what YOU CHANGE
The temperature at which each bean is kept is the independent variable.
INDEPENDENT VARIABLE:
Independent variable is a variable that is changed or manipulated by the experimenter. The independent variable, which is also called manipulable variable, causes the dependent variable to respond, which is measured or recorded. In an experiment to determine the temperature at which beans sprout the fastest, the independent variable is the temperature at which each bean is kept is the independent variable.Learn more: https://brainly.com/question/17498238?referrer=searchResults
Question you have about rocks or minerals
A decomposition occurs when you open a can or bottle of soda. Carbonic acid,H2CO3, is in carbonated beverages. It decomposes into carbon dioxide and water. If you leave an open soda can out for a long time, it loses its fizz. Which equation represents the balanced chemical equation for this reaction?
Answer:
H₂CO₃ (aq) → CO₂ (g) + H₂O (l)
Explanation:
Step 1: Write out unbalanced decomposition equation
H₂CO₃ (aq) → CO₂ (g) + H₂O (l)
Step 2: Balance equation
We see that we have 3 oxygens on both sides of the reaction.
We also see that we have 1 carbon on both sides of the reaction.
We also see that we have 2 hydrogens on both sides of the reaction.
Therefore, the chemical equation is balanced.
What are the characteristics for natural resources ?
Answer:
The characteristcs of natural resources are commercial and industrial use.
It includes soil, salt, oil, natural gas, coal, iron.
The element X has three naturally occurring isotopes. The isotopic masses (amu) and % abundances of the isotopes are given in the table below. Calculate the average atomic mass of the element in amu. PLEASE HELP ASAP THANK YOU SO MUCH
Answer:
162.35 amu
Explanation:
Let A represent isotope X-159
Let B represent isotope X-163
Let C represent isotope X-164
The following data were obtained from the question:
Isotope >>> Abundance >>> Mass no
A >>>>>>>> 30.60 >>>>>>>> 159.37
B >>>>>>>> 15.79 >>>>>>>>> 162.79
C >>>>>>>> 53.61 >>>>>>>>> 163.92
Average Atomic mass =.?
The average atomic mass of element X can be obtained as follow:
Average atomic mass = [(mass of A × A%)/100] + [(mass of B × B%)/100] + [(mass of C × C%)/100]
= [(159.37 × 30.60)/100] + [(162.79 × 15.79)/100] + [(163.92 × 53.61)/100]
= 48.77 + 25.70 + 87.88
= 162.35 amu
Therefore, the average atomic mass of element X is 162.35 amu
Which term describes the energy an object has because of its motion?
Answer:
kinetic
Explanation:
The density of an element is 11.3 g/cm'. What is its density in kg/mº?
Answer:
11.3 g/cm³ = 11.3x100x100x100/ 1000 = 11300kg/m³
Explanation:
Can someone help me with example #1 please
Answer: 343 K
Explanation:
To convert Celsius to Kelvin, you would add 273 to Celsius.
70°C+273=343 K
Now, we know that 70°C is 343 K.
(01.04 LC)
What phase of matter has particles that are held together but can flow past each
other and takes the shape of a container, filling it from the bottom up? (3 points)
1) Gas
2) Liquid
3) Plasma
4) Solid
what are we referring to when we talk about the position of an object
Explanation:
The location of a body with reference to a given point.
Which device involves the use of plasma in technology? arc welder diesel engine incandescent lightbulb battery-operated flashlight
Answer:
arc welder involves use of plasma in technology
The device involves the use of plasma in technology is "arc welder"
What is plasma ?The 4th phase of matter, after solid, liquid, as well as gas, often been referred to as plasma. Inside a particular substance that is solid, liquid, or even gaseous, the electrons typically stick with almost the unique atomic nucleus.
What is arc welder?Using electricity to generate sufficient heat to dissolve metal as well as then allowing the melted metals to cool, arc welding would be a technique for joining metals together.
Arc welding employs the plasma technology principle because the gas would be ionized.
Therefore, the correct answer will be option (a).
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According to Democritus, what is the composition of matter?
Answer:
he composition of matter is invisible particles called atoms.
Explanation:
I'm sure its correct
Answer:
The composition of matter is invisible particles called atoms. ... The root of the word "atom" is atomos, meaning uncuttable.
From Google
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Calculate the percent composition for each of the elements in Na3PO4. A 5.00 gram sample of an oxide of lead PbxOy contains 4.33 g of lead. Determine the simplest formula for the compound. Balance the following equations by inspection: Cu(N03)2 rightarrow CuO + NO2 + O2 C2H6 + O2 rightarrow CO2 + H2O Mg3N2 + H2O rightarrow Mg(OH)2 + NH3 Magnesium (Mg) reacts with chlorine gas (C12) to produce magnesium chloride (MgC12). How many grams of Mg will react with 2 moles of Cl2? Mg(s) + C12(g) rightarrow MgC12(s) The compound P4S3 is used in matches. It reacts with oxygen to produce P4O10 and SO2. The unbalanced chemical equation is shown below, P4S3(s) + O2(g) rightarrow P4O10(s) + SO2(g) What mass of SO2 is produced from the combustion of 0.331 g P4S3 in excess O2? Nitric oxide is made from the oxidation of ammonia. What mass of nitric oxide can be made from the reaction of 8.00 g NH3 with 17.0 g O2? 4 NH3(g) + 5 O2(g) rightarrow 4 NO(g) + 6 H2O(g) To what volume should you dilute 50.0 mL of 12 M HNO3 solution to obtain a 0.100 M HNO3 solution?
Answer:
1. Percentage composition of: Na = 42%; P = 19.0%; O = 39%
2. Simplest formula of compound is PbO₂
3. (i) 2Cu(NO₃) ---> 2CuO + 2NO₂ + 3O₂
(ii) 2C₂H₆ + 7O₂ ---> 4CO₂ + 6H₂O
(iii) Mg₃N₂ + 6H₂O ---> 3Mg(OH)₂ + 2NH₃
4. 48 g of MG will react with 2 moles of Cl₂
5. 0.288 g of SO2 will be produced from the combustion of 0.331 g P₄S₃ in excess O₂
6. 12.8 g of nitric oxide can be produced from the reaction of 8.00 g NH₃ with 17.0 g O₂
7. The stock acid solution should be diluted to 6000 mL or 6.0 L
Explanation:
The full explanation is found in the attachments below
You estimate that you sent 135 texts last week but when you get the bill, it was actually 175. Calculate the percent error
Answer: -40
Explanation: Percent error is calculated by subtracting the value you actually recieved from the literature value (175 in your case) SO your answer should be 135-175=-40.
Which is the formula mass of (NH4)2SO4?
0 96.07 amu
114.12 amu
O 116.17 amu
132.17 amu
Answer:
D. 132.17 amu
Explanation:
The formula mass of a compound can be determined from the formula of the compound thus, from the number each elements present. The formula mass of (NH₄)₂SO₄ is 132.17 amu.
What is formula mass?
Formula mass of a compound is the mass calculated from its formula. Each elements has a definite mass called its atomic mass expressed in g/mol or amu.
Mass number of an element is the sum of number of its protons and neutrons. The actual mass of an element is calculated with respect to the mass of 1/12th of Carbon-12 and it is called relative mass.
Here, the atomic mass of N = 14.006 amu
mass of H = 1.008 amu.
There are 4 hydrogen thus 4 × 1.008 = 4.008 u.
The mass of two units of NH₄ is = (14.006 + 4.008) × 2
= 36.028 u.
Atomic mass of sulfur = 32.6 amu
atomic mass of oxygen = 15.9 amu.
Thus for 4 oxygens = 15.9 × 4 = 63.6 u
The mass of SO₄ unit = 32.06 + 67.6 = 96.2u
Thus the total mass of (NH₄)₂SO₄ = 96.2 + 36.028
= 132.17 amu
Hence, the formula mass of (NH₄)₂SO₄ is 132.17 amu. Thus, option D is correct.
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what is the Si base unit of mass?
what is the base unit/1000 of mass?
what is the base unit×1000 of mass?
what is the base unit of liquid volume? what is the base unit/1000?
what is the base unit×1000?
what is the base unit of temperature? what is the base unit/1000?
what is the base unit×1000?
The SI unit of temperature is the kelvin (K), which spans the same temperature change as the degree Celsius. The Kelvin scale is a thermodynamic scale, meaning that its zero point is at absolute zero rather than the freezing point of water. The second reference point for this scale as it is currently defined is the triple point of water, which is a unique point on the phase diagram of water (a specific combination of pressure and temperature) where ice, liquid water and water vapor are all in equilibrium. The triple point is assigned the temperature of 273.16 K.
The old centigrade scale used the freezing and boiling temperatures of water as its reference points, with one degree centigrade equal to 1/100 of the temperature span between the freezing and boiling points of water. The definition of the Kelvin scale was chosen to make the kelvin the same size as the centigrade degree.
The Celsius scale is defined in terms of the Kelvin scale but is equivalent to the old centigrade scale, which it replaces. It is convenient for reporting weather and cooking temperatures and so on, but is not particularly useful for scientific purposes. For instance, the behavior of gases which approximate ideal gases is such that at zero degrees C they experience a volume change of 1/273 for a one degree change in temperature. This observation provided one of the first indications for the value of absolute zero.
When using the ideal gas law:
PV = nRT
where P is pressure
V is volume
n is the quantity of gas in moles
R is a constant
T is the temperature
it is necessary to use a thermodynamic scale, usually Kelvin.
Another thermodynamic scale, the Rankine scale, has a relationship to the Fahrenheit temperature scale analogous to that between the Kelvin and Celsius scales.
In which field(s) is knowledge about how science works important?
A. Medicine
B. All of these are correct
C. Law
D. Politics
E. Agriculture
Answer:B
Explanation:
b.) If the half-life of Carbon-14 is 5230 years and I start with 100 grams, how long will it take for the
Carbon-14 to decay to 3.125 grams?
Answer:
26150 years
Explanation:
First we need to determine the number of half lives -- not years -- it'll take for 100g (of any element) to decay to 3.125 g
First Half Life 100/2 = 50
Seconf Half Life 50/2 = 25
Third Half Life 25/2 = 12.5
Fourth Half Life 12.5/2 = 6.25
Fifth Half Life 6.25/2 = 3.125
So it'll take 5 half lives for 100g to decay to 3.125g.
If the Half Life of Carbon-14 is 5230 and it will take 5 half lives, to determine the number of years we just need to multiply 5*5230
5*5230 = 26150
This means that it will take 26150 years for 100g Carbon-14 to decay to 3.125g.
Hope this helps!
An increase in temperature usually slows down a chemical reaction.
True or false? Because?
Which charts or graphs always use axes both labeled with quantitative values and show individual points of data, meaning that each point matches with one value on the x-axis and one value on the y-axis? Check all that apply.
The graphs which use axes both labeled with quantitative values and show individual points of data include:
Scatter plotsLine graphsBar graphs.What is a Graph?Thus is defined as a pictorial representation of data or variables in an organized or definite manner.
The graphs mentioned above always have each point matching with one value on the x-axis and one value on the y-axis.
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How many significant figures are in the following numbers?
a. 0.002849
b. 40030
the number of electrons in n=1 and n=2 shells of aluminum are
Answer:
n=1 holds two electrons and n=2 holds eight electrons.
Explanation:
Hello
In this case, since the atomic number of aluminum is 13, its electron configuration is:
[tex]Al^{13}: 1s^2,2s^2,2p^6,3s^2,3p^1[/tex]
In such a way, we can see that the level n=1 is filled with two electrons since the subshell s is able to hold two electrons and the level n=2 is also filled but with eight electrons as s holds two whereas p holds 6. Moreover, n=3 is holding three electrons.
Best regards.
example for Conceptual
Answer:
The definition of conceptual is something having to do with the mind, or with mental concepts or philosophical or imaginary ideas. An example of conceptual is when you formulate an abstract philosophy to explain the world which cannot be proven or seen. "Conceptual."
Explanation:
100.0 mL of a 0.500 M solution of KBr is diluted to 500.0 mL. What is the new concentration of the solution
Answer:
0.1 M
Explanation:
The following data were obtained from the question:
Initial volume (V1) = 100 mL
Initial concentration (C1) = 0.5 M
Final volume (V2) = 500 mL
Final concentration (C2) =?
Using the dilution formula C1V1 = C2V2, the new concentration of the solution can be obtained as follow:
C1V1 = C2V2
0.5 × 100 = C2 × 500
50 = C2 × 500
Divide both side by 500
C2 = 50/500
C2 = 0.1 M
Therefore, the new concentration of the solution is 0.1 M
The new concentration of the solution of KBr that was diluted to 500mL is 0.1M
HOW TO CALCULATE CONCENTRATION:
The concentration of solution that was diluted can be calculated using the formula as follows:C1V1 = C2V2Where:
C1 = original concentration (M)C2 = diluted concentration (M)V1 = original volume (mL)V2 = diluted volume (mL)According to this question, 100.0 mL of a 0.500 M solution of KBr is diluted to 500.0 mL. The new concentration can be calculated as follows:0.500 × 100 = C2 × 50050 = 500C2C2 = 50 ÷ 500C2 = 0.1MTherefore, the new concentration of the solution of KBr that was diluted to 500mL is 0.1M.Learn more at: https://brainly.com/question/10720472?referrer=searchResults
2. Report each of the following quantities to 3 significant figures. Use standard notation if possible, or
exponential notation if standard notation won't work.
a. 86,942
f. 56,018
b. 0.00621875
g. 0.003870
c. 107062.03
h. 15.9994
d. 4.00049
i. 12.011
e. 96
j. 2,000
Answer:
a. 86,942 = 8.69x10⁴
f. 56,018 = 5.60x10⁴
b. 0.00621875 = 6.22x10⁻³
g. 0.003870 = 3.87x10⁻³
c. 107062.03 = 1.07x10⁵
h. 15.9994 = 16.0
d. 4.00049 = 4.00
i. 12.011 = 12.0
e. 96 = 9.60x10¹
j. 2,000 = 2.00x10³
Explanation:
Hello,
In this case, rounding off each measurement to three significant figures, considering that if the fourth figure is five or more, the third one is rounded, we obtain:
a. 86,942 = 8.69x10⁴ (four places until the last digit and third digit is not rounded).
f. 56,018 = 5.60x10⁴ (four places until the last digit and third digit is not rounded).
b. 0.00621875 = 6.22x10⁻³ (three places until the first digit and third digit is rounded).
g. 0.003870 = 3.87x10⁻³ (three places until the first digit and third digit is not rounded).
c. 107062.03 = 1.07x10⁵ (five places until the last non-decimal digit and third digit is not rounded).
h. 15.9994 = 16.0 (those consecutive nines round the number to 16.0).
d. 4.00049 = 4.00
i. 12.011 = 12.0
e. 96 = 9.60x10¹ (exponential notation is needed since the number initially has two significant figures so an additional zero is added)
j. 2,000 = 2.00x10³ (three places until the last digit and third digit is not rounded).
Best regards.
Which of the following is true for all chemical reactions? The total mass of the reactants increase. The total mass of the products is greater than the total mass of the reactants. The total mass of the products is less than the total mass of the reactants. The total mass of the reactants equals the total mass of the products.
Answer:
The total mass of the reactants equals the total mass of the products.
Explanation:
The true statement for all chemical reactions is that the total mass of the reactants equals the total mass of the products.
What is chemical reaction?Chemical reactions are those reactions in which reactants react with each other and converted into products for the completion of the reaction.
Let us assume a chemical reaction:
A + B → C + D
Where, A & B are reactants which are converted into products C & D. Means mass of reactants will convert into the mass of products as it follows the law of conservation of mass.
So, total mass of the reactants equals the total mass of the products.
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The value of ΔG°′ΔG°′ for the conversion of glucose-6-phosphate to fructose-6-phosphate (F6P) is +1.67 kJ/mol+1.67 kJ/mol . If the concentration of glucose-6-phosphate at equilibrium is 2.95 mM2.95 mM , what is the concentration of fructose-6-phosphate? Assume a temperature of 25.0°C25.0°C .
Answer:
The concentration of fructose-6-phosphate is 1.50x10⁻³M
Explanation:
Gibbs Free energy, ΔG°, is defined as:
ΔG° = -RTln K
Where ΔG° = 1670J/mol
R is gas constant = 8.314J/molK
T is absolute temperature (25°C + 273.15 = 298.15K)
Thus, equilibrium constant, k, is:
1670J/mol = -8.314J/molK* 298.15K ln K
-0.6737 = ln K
0.5098 = K
K of the reaction:
G6P ⇄ F6P
is:
K = 0.5098 = [F6P] / [G6P]
As [G6P] is 2.95x10⁻³M:
0.5098 = [F6P] / [2.95x10⁻³M]
[F6P] = 1.50x10⁻³M
The concentration of fructose-6-phosphate is 1.50x10⁻³MChoose the answer that shows the following number correctly
written in scientific notation.
430,000
a 4.3 x 104
b 43 x 104
C 0.43 x 106
d 4.3 x 105
List all the different ways we can use a model to represent things
convert 13.4 degrees celcius into kelvin
Answer:
286.55K
Explanation:
To convert to kelvin , add 237 .15
[tex]13.4\°C + 273.15 = 286.55K[/tex]
Answer:
13.4 degrees celsius =
286.55 kelvins
Temperature
13.4
Celsius
286.55
Kelvin
Formula
13.4°C + 273.15 = 286.55K
Explanation:
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5400 L to KL
With work??
Answer:
5.4KL
Explanation:
Divide by 1000