Answer:
11.33g of hydrogen
Explanation:
We need to apply the formulae;
Nt/No= (1/2)^t/t1/2
Where;
Nt= mass of hydrogen remaining after a time t (the unknown)
No= mass of hydrogen initially present = 2900g
t= time taken for Nt mass of hydrogen to remain = 19600 years
t1/2= half-life of hydrogen= 2450 years
Substituting values;
Nt/2900= (1/2)^19600/2450
Nt/2900= (1/2)^8
Nt/2900= 1/256
256Nt= 2900
Nt= 2900/256
Nt= 11.33g of hydrogen
Therefore, 11.33g of hydrogen is left after 19600years.
Is the earth older than any of the rock layers.
Yes, the Earth is Older than most of the Rock Layers.
About 6,000 years ago God created light to divide the darkness. The next day created the atmosphere and the oceans so there was no land yet. But on the next day he created the land that divided the water and vegetation was created.
These are true facts from Genesis 1
You have a gas at a pressure of 5 atm and a temperature of 300 K, what is the new pressure if the temperature is decreased to 200 K?
Answer:
3.33 atm
Explanation:
P1/T1 = P2/T2
5 atm/ 300 K = P2 /200K
P2 = 5atm*200 K/300 K
P2 = 3.33 atm
what are the typical properties of a group 1 metal
Answer:
The group 1 elements are all soft, reactive metals with low melting points. They react with water to produce an alkaline metal hydroxide solution and hydrogen.
Explanation:
How would you solve this?
"Calculate the amount of energy transferred if only 650.50 grams of sulfur trioxide (SO3) gas were produced. (Remember the ∆H = -396.8 kJ is part of the balanced equation)"
balanced equation: 2 SO2 (g) + O2(g) ⇌ 2 SO3 (g) ∆H = -396.8 kJ
Answer:
1.6×10^3 KJ
Explanation:
We must first calculate the number of moles corresponding to 650.50g of sulphur trioxide.
Number of moles = mass of sulphur trioxide/ molar mass of sulphur trioxide
Molar mass of sulphur trioxide= 80.066 g/mol
Given mass of sulphur trioxide= 650.50g
Number of moles = 650.50g / 80.066 g/mol
Number of moles = 8.124 moles of sulphur trioxide
Now from the balanced reaction equation;
Formation of 2 moles of sulphur trioxide evolves 396.8KJ of energy.
Therefore formation of 8.124 moles of sulphur trioxide will evolve;
8.124moles × 396.8 KJ /2 moles = 1611.8KJ or 1.6×10^3 KJ
How can an invasive species like weeds affect crops on a farm?
A) It competes with the crops on that farm for resources.
B) It can turn productive land into unusable land.
C) It overtakes the crop population of that farm.
D) lț can serve as habitat for pests.
E) All of the above
Answer:
E
Explanation:
All of the above
what pressure, in atmospheres is exerted by 0.325 mol of hydrogen gas in a 14.08L container at 35°C ?
Answer:0.58 atm
Explanation:see attached photo
Answer:
[tex]P=0.583atm[/tex]
Explanation:
Hello,
In this case, by using the ideal gas equation:
[tex]PV=nRT[/tex]
We can compute the pressure as shown below, considering the given data and absolute temperature:
[tex]P=\frac{nRT}{V}=\frac{0.325mol*0.082\frac{atm*L}{mol*K}*(35+273)K}{14.08L}\\ \\P=0.583atm[/tex]
Best regards.
a _ is a push or pull
Answer:
force
Explanation:
Answer:
what dose this mean "_" is there an image that could help?
how chemistry has affected the study microbiology
Answer:
because it's way to confusing and something that gets harder
Which of the following contains salt water?
Lake
Ocean
River
Glacier
Answer:
Ocean
Explanation:
The maximum salinity is about 35 parts per mille. Among other terms, around 3.5 per cent of seawater weight is produced from salts dissolved.
So a lot of salt water in oceans
Hope this helps.
Answer:
b)
Explanation:
ocean is a containing salt water
Which one is correct
Answer:
number 3.
Explanation:
Answer:
3
Explanation:
Sound travels at 340 m/s in dry air at room temperature. What is the
wavelength of sound waves with a frequency of 880 Hz under those
conditions?
Answer:
Wavelength of sound waves[tex]\ambda = 386[/tex] millimetres
Explanation:
The speed of any wave is equal to the product of its wavelength and frequency.
This can be represented mathematically as
[tex]V = f* \lambda[/tex]
Where
V is the speed of sound waves
f is the frequency of sound waves
and
[tex]\lambda[/tex] is the wavelength of the sound waves.
Substituting the given values in above equation we get -
[tex]340 = f * \lambda\\\lambda = \frac{340}{880} \\[/tex]
[tex]\lambda = 0.386[/tex] meters
[tex]\ambda = 386[/tex] millimetres
4.1 kg of a plastic, used to make plastic bottles, has a carbon footprint of 6.0 kg of carbon dioxide.
Calculate the carbon footprint of one plastic bottle of mass 23.5 g
Answer:
The carbon footprint of one plastic bottle of mass 23.5 g is 34.390 g.
Explanation:
The carbon footprint of one plastic bottle can be estimated by simple rule of three. That is:
[tex]x = \frac{23.5\,g}{4100\,g}\times 6000\,g[/tex]
[tex]x = 34.390\,g[/tex]
The carbon footprint of one plastic bottle of mass 23.5 g is 34.390 g.
What is potential energy
Potential energy has to do with the energy held
by an object because of its position.
Potential energy is energy that is stored
which can be used to do work.
a sample of gas at a pressure of 5.1 atm and a temperature of 45 degrees celsius is heated. it’s pressure goes to 7.8 atm what is it’s new temperature in celsius
Answer:
213.4°C.
Explanation:
Data obtained from the question:
Initial pressure (P1) = 5.1atm
Initial temperature (T1) = 45°C = 45°C + 273 = 318K
Final pressure (P2) = 7.8atm
Final temperature (T2) =..?
The new temperature can be obtained as follow:
P1/T1 = P2 /T2
5.1/318 = 7.8/T2
Cross multiply
5.1 x T2 = 318 x 7. 8
Divide both side by 5.1
T2 = 318 x 7. 8 /5.1
T2 = 486.4K
Finally, we shall convert 486.4K to celsius temperature. This can be done as follow:
T(°C) = T(K) – 273
T(K) = 486.4K
T(°C) = 486.4 – 273
T(°C) = 213.4°C.
Therefore, the new temperature is 213.4°C
Na2S2O3(aq) + HCl(aq) → S(s) + SO2(g) +
_NaCl(aq) + H2O(1)
A.6
B. 7
C. 8
D.9
WILL BE AWARDED BRAINLIEST
A balloon occupies a volume of 44 L at 200K, what will the temperature of the balloon become if it is changed to 500K?
Answer:
110L
Explanation:
The following data were obtained from the question:
Initial volume (V1) = 44L
Initial temperature (T1) = 200K
Final temperature (T2) = 500K
Final volume (V2) =..?
The new volume of the balloon can be obtained by using Charles' law equation as shown below:
V1/T1 = V2/T2
44/200 = V2/500
Cross multiply
200 x V2 = 44 x 500
Divide both side by 200
V2 = 44 x 500/200
V2 = 110L
Therefore, the new volume of the balloon is 110L
What is the molarity of 5.74 liters of solution made with 246 grams of iron (III) chloride (FeCl3)? Answer with 3 SDs.
Answer:
0.264 mol/L
Explanation:
Data obtained from the question includes:
Volume = 5.74L
Mass of FeCl3 = 246 g
Molarity =?
Next, we shall determine the number of mole in 246g of FeCl3.
This is illustrated below:
Mass of FeCl3 = 246g
Molar mass of FeCl3 = 56 + (35.5x3) = 162.5g/mol
Number of mole of FeCl3 =..?
Mole = Mass /Molar Mass
Number of mole of FeCl3 = 246/162.5
Number of mole of FeCl3 = 1.514 mol
Now, we can obtain the molarity of the solution as follow:
Molarity = mole /Volume
Volume = 5.74L
Mole of FeCl3 = 1.514 mol
Molarity = 1.514/5.74
Molarity = 0.264 mol/L
Which compounds are electrolytes
Answer:
Calcium.
Potassium.
Chlorine.
Magnesium.
Sodium.
Phosphate.
Explanation:
if you flirt with someone else is that considered cheating ?
Answer:
Depends how your flirting
Explanation:
Answer:
yes, because if you love someone you wont want anyone else. therefore if you flirt your giving someone else the attention your significant other is suppose to get from you.
Explanation:
Can I Plz Have help?!?!?!?
(Q1) What is the correct value for coefficient (A)?
A. 1
B. 2
C. 3
D. 4
(Q2) What is the correct value for coefficient (B)?
A. 1
B. 2
C. 3
D. 4
(Q3) What is the correct value for coefficient (C)?
A. 1
B. 2
C. 3
D. 4
(Q4)What is the correct value for coefficient (D)?
A. 1
B. 2
C. 3
D. 4
(Q5) If there is enough energy and H2, then how many moles of Sn02 will react with 2 moles of H2 and produce 1 mole of Sn and 2 moles of H2O? How many moles of SnO2 does this balanced equation represent?
A. 0.5
B. 1.0
C. 1.5
D. 2.5
(Q6)The reactants in this equation are _________.
A. SnO2 and Sn
B. Sn and H2O
C. SnO2 and H2
D. H2 and H2O
(Q7)The products in this equation are _________.
A. SnO2 and Sn
B. Sn and H2O
C. SnO2 and H2
D. H2 and H2O
(Q8)This reaction is ___________.
A. endothermic
B. exothermic
Answer:
1. A
2. B
3. A
4. B
5. B
6.C
7. B
8. A
Explanation:
SnO₂ + H₂ + energy → Sn + H₂0
The reaction is between Tin(iv) oxide and hydrogen gas to form tin and water molecules.
Notice the reaction is not balance therefore let us balance the equation. To balance the equation the number of atoms on both side (reactant and product)of the equation must be equal.
SnO₂ +2H₂ → Sn + 2H₂0
The equation is balanced . SnO₂ has coefficient of 1 , H₂ has coefficient of 2, Sn has coefficient of 1 and H₂0 has coefficient of 2.
Q5
SnO₂ + 2H₂→ Sn + 2H₂0
1 moles of SnO₂ will balance the equation
Q6
The reactant is on the left side of the chemical equation. Therefore the reactants are Tin(iv) oxide and hydrogen molecules (SnO₂ and H₂)
Q7
The product is on the right side of the chemical equations .Therefore, the products are Tin and water molecules(Sn and H₂0).
Q8
The reaction is an endothermic reaction because it absorb heat from it environment.
Identical twins are born with black hair. They grow up together as children, but as adults they live far apart and lead very different lives. How do you explain why one of the twin's black hair turns gray over time?
Answer:
Identical twins came from the same sperm and egg, so they have the same chromosomes and genes. ... As identical twins get older they may look more and more different, because they are exposed to more diverse environments. The science of epigenetics explains how these environmental influences can affect the genes.
hope this is helpful!
The color changes occurs in hair might caused by life styles and diet irrespective of the genetical traits. The damaged pigment cells causes the gray hair.
What are genetic traits ?Each characteristics in a living thing is coded by genes in them. These codes corresponding to some behaviors are called genetic traits. The pigment melamine make the hair black.
Variation in the pigment makes the color variation in hair also. Gray hair may appear on anyone at any age. Some people begin to go grey as early as when they are in high school or college.
Our genes decide when we begin to grey our hair. That a result, the majority of us will start ageing at around the same time as our parents or grandparents did.
However, our lifestyle and diet also influence the hair and skin color. Therefore, there might have differences in appearance of twins too.
Find more on genetic traits:
https://brainly.com/question/2655226
#SPJ5
A hurricane is destroyed by?
HELPPPPPPPPPPPPOOOooooooo
What is an allele?
a
A type of cell.
b
A blood type.
С
A type of mutation.
d
A variation of a gene.
Answer:
D. a variation of a gene
1- What do greenhouse gases do in our atmosphere? a. They absorb radiation given off by the Earth b They block harmful radiation from reaching the Earth c .They keep all the air within the Earth d .They make the Earth cooler
Answer: A. They absorb radiation given off by the earth.
Explanation: Green house gases are gases that have the capability of trapping the heat energy from the sun in our environment. These special attribute of these gases is what keeps our environment warm and sustain life as we know it. Example of Green House Gases include: carbon dioxide, water vapour and methane.
Answer:
A. THEY ABSORBS RADIATION GIVEN OFF BY THE EARTH.
Explanation:
Greenhouse gases are gases capable of absorbing and emitting infrared radiations in different wavelength range emitted by the earth. These gases include water vapor, carbon iv oxide, methane, ozone, chlorofluorocarbons, nitric oxide, hydrofluorocarbons. These gases contribute to the greenhouse effects and there actions are dependence on their respective characteristics, abundance in the atmosphere and the indirect effects it causes. Earth surfaces absorbs radiant energy from the sun and these radiations are reflected as light or reflected back to space as hear. Greenhouse gases are involved in absorbing and emitting these incoming energies in order to create a balance between the incoming and outgoing energies. This determines the temperature on the earth surface. The earth can be warm or cold depending on the direction the difference in this balance shifts. Without the greenhouse gases the average temperature of the earth will be lower than the expected temperature.
Name two inputs, two outputs and two side effects of the healthcare system.
Answer:
Healthcare system is one of the most important in any country’s economy.
Health care system Inputs include Medication, patients, locations
Outputs: Treating injured or sick people, taking care of people's health
Side effects: Lack of medication/drugs or no right medication, wrong diagnosis or prescription.
What is the answer I need help I’m stuck
Answer:
Formation of covalent bonds in water
☆CHEERS!☆How many molecules are in 7.32 moles of sulfur dioxide?
Answer:
4.41 × 10²⁴ molecules SO₂
General Formulas and Concepts:
Atomic Structure
CompoundsMolesStoichiometry
Using Dimensional AnalysisExplanation:
Step 1: Define
[Given] 7.32 moles SO₂
[Solve] molecules SO₂
Step 2: Identify Conversions
Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.
Step 3: Convert
[DA] Set up: [tex]\displaystyle 7.32 \ moles \ SO_2(\frac{6.022 \cdot 10^{23} \ molecules \ SO_2}{1 \ mol \ SO_2})[/tex][DA] Multiply [Cancel out units]: [tex]\displaystyle 4.4081 \cdot 10^{24} \ molecules \ SO_2[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
4.4081 × 10²⁴ molecules SO₂ ≈ 4.41 × 10²⁴ molecules SO₂
Answer:
4.41 × 10²⁴ molecules SO₂
Explanation:
The Person is right
010)
Which solution is the most concentrated?
A. 75% isopropyl alcohol
B. 7% isopropyl alcohol
C. 95% isopropyl alcohol
11)
Answer:
C
Explanation:
95 > 7
95 > 75
The answer is C.
4Fe +302 + 2Fe2O3
How many grams of Fe2O3 will be produced from 10.0 g of Fe and 7.00 g of O2?
Answer:10g of Fe produces 14.37g of Fe2O3
7g of O2 produce 46.84g of Fe2O3
Explanation: