Answer:
These are called cis-but-2-ene (where the groups are on the same side) or trans-but-2-ene (where they are on opposite sides). Cis-but-2-ene is also known as (Z)-but-2-ene; trans-but-2-ene is also known as (E)-but-2-ene. For an explanation of the two ways of naming these two compounds, follow the link in the box below.
Explanation:
Which action is not an accomplishment of the Apollo missions?
to study the surface of the moon
to orbit the Earth for two weeks
to send rovers to the Moon
to land on the moon
Answer:
to send rovers to the Moon.
Explanation:
Apollo refers to the project led by The National Aeronautics and Space Administration (NASA) to study the environment of the Moon in the 1960s and 1970s. Project Apollo 's objectives went beyond landing humans on the moon and getting them back safely to Earth. They included attempting to establish technology to meet other national space interests, to carry out a plan of scientific observation of the Moon, enhancing human capacity to work in the lunar climate, etc.
Answer:
man this was the ONLY question i missed i would have have a 100% accuracy!
Explanation:
If you are given a 2,900-gram sample of Hydrogen, and hydrogen has a half-life of 2,450 years. How much hydrogen is left after 19,600 years?
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.
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
Which equation represents a spontaneous reaction?
A) Ca + Ba2+ to Ca2+ + Ba
B) Co + Zn2+ to Co2+ + Zn
C) Fe + Mg2+ to Fe2+ + Mg
D) Mn + Ni2+ to Mn2+ + Ni
Answer:Mn+Ni2+-->Mn2+ + Ni
Explanation:
Castle Learning said it
How do you determine if the reaction is spontaneous?
If ΔH is negative, and –TΔS positive, the reaction will be spontaneous at low temperatures (decreasing the magnitude of the entropy term).
What is the meaning of spontaneous reaction?
When both of these conditions are met, the reaction occurs naturally. A spontaneous reaction is a reaction that favors the formation of products at the conditions under which the reaction is occurring.
Learn more about spontaneous reaction here : brainly.com/question/24376583
#SPJ2
If atmospheric pressure measurement for taking at regular intervals from sea level to the stratopause The measurements with most likely show that the pressure
Answer:
Troposphere
Explanation:
The troposphere is the lowest layer of Earth's atmosphere that extends from under the stratosphere down to the surface of the earth. Nearly all weather condition takes place in the troposphere. The troposphere contains about 75% of the atmosphere's mass and 99% of the total mass of water vapour and aerosols in the atmosphere.
Answer: Pressure decreases.
Explanation:
Atmospheric pressure is termed as the downward force applied by the weight of air against a particular area on Earth's surface. the Standard atmospheric pressure is determined by weighing the column of air occupying 1 square inch on Earth's surface which begins at sea level and moves upward to the uppermost layer of the atmosphere
Measuring the Atmospheric pressure from sea level to the stratosphere,the second layer of the atmosphere which contains the most of the ozone gas show that the pressure decreases
what is 3 ethyl 3, 4 dimethylheptane abbreviated structural formula?
Answer:
CH2- CH3
|
CH3 - CH2 - C - CH - CH2 - CH2 - CH3
| |
CH3 CH3
Explanation:
Heptane
CH3 - CH2 - CH2 - CH2 - CH2 - CH2 - CH3
3 ethyl 3, 4 dimethylheptane
CH2- CH3
|
CH3 - CH2 - C - CH - CH2 - CH2 - CH3
| |
CH3 CH3
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
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.
Help me now, please!
_SnO2 + _H2 + Energy → _Sn + _H2O
1) Find the correct coefficients for all the "_"s.
2) Answer this question: 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?
3) Answer this question: If you add up the total grams of reactants and then compare it to the total grams of product, the 2 numbers should be the same. If they are not the same you have made a mistake somewhere before this and need to go back and find and fix it. The total g of reactants and products were _ g and _ g respectively.
Answer:
1. SnO2 = 1; H2 = 2; Sn = 1; H2O = 2
2. I mole of SnO2 is required to react with 2 moles of H2 to produce 1 mole of Sn and 2 moles of H20.
The balanced equation represents 1 mole of SnO2
3. Total mass of reactants and products are each 154.71g respectively
Explanation:
1. According to the law of conservation of mass, the total mass of reactants in a chemical reaction is equal to the mass of products.
Therefore, a balanced chemical equation has equal number of moles of each atom on the reactants side and on the product side. The balanced chemical equation for the reaction above will be:
Sn02 + 2H2 + Energy -----> Sn + 2H2O
Sn has 1 mole of atoms on both sides
O has 2 moles of atoms on both sides
H has 4 miles of atoms on both sides.
2. According to the balanced chemical equation above,
1 mole of SnO2 reacts with 2 moles of H2 to produce 1 mole of An and 2 moles of H20.
This balanced equation represents 1 mole of SnO2.
3. The atomic masses of Sn, O and H are 118.71g, 16g and 1g respectively.
Therefore, the molar masses of the reactants and products are;
SnO2 = 118.71 + 16 * 2 = 150.72g
H2 = 2 *1 = 2g
H2O = 2 * 1 + 16 = 18g
Total mass of reactants = 150.71g + 2 * 2g = 154.72g
Total mass of products = 118.71 + 2 * 18g = 154.71g
If energy is shown on the product side of the equation, then the
1.
reaction
A.
is exothermic.
B.
is endothermic.
C.
does not require any activation energy.
D.
does not include
any
other product.
Answer:
is exothermic
Explanation:
releases energy to the atmosphere
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.
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
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
i will give the brainliest for who answer this questio but no guessing
Write the common names of group IVA, VIIA and VIII A _____________________ ,
____________________ , _____________________
Answer:
IVA: nonmetal/other metals VIIA:halogens VIII: Nobel Gases
Explanation:makes sense
A hurricane is destroyed by?
HELPPPPPPPPPPPPOOOooooooo
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 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.
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
if the ph of phosphoric acid is 1.5 what is its molarity?
Answer:
0.032 M
Explanation:
pH denotes the acidity or alkalinity of an aqueous solution. pH stands for potential hydrogen. The letter “p” denotes potential and the letter “H” denotes for hydrogen. A pH number varies from 0 to 14 depending upon on how acidic or alkaline a liquid is. Any aqueous solution that has pH above 7 is alkaline and any aqueous solution that has pH below 7 is acidic.
ph of phosphoric acid = 1.5
pH = -log[[tex]H_3O^+[/tex]]
1.5 = -log[[tex]H_3O^+[/tex]]
-1.5 = log[[tex]H_3O^+[/tex]]
[tex][H_3O^+]=10^{-1.5}[/tex] = 0.032 M
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
The pressure inside a sealed container is 97.9 kPa when the temperature is 298 K.
What will the pressure be if the temperature is 376 K?
Answer:
123.5 kPa
Explanation:
P2=P1T2/T1
You can check this by knowing that P and T at constant V have a proportional relationship. Hence, this is correct.
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
please help I have no idea tbh
Answer: I believe the answer is B. Sorry if i'm wrong
Explanation:
Which of the following best describes bases? A. They feel slippery and taste sour. B. They turn red litmus paper blue and react with metals. C. They taste bitter and react with carbonates. D. They turn red litmus paper blue and taste bitter.
Answer: D. They turn red litmus paper blue and taste bitter.
Explanation:
Acids are those substances which either donates hydrogen ions when dissolved in water. They have pH ranging from 1 to 6.9. They are sour in taste. They dissolve metals to give hydrogen gas. They turn blue litmus red.
Bases are those substances which either donates hydroxide ions when dissolved in water or donates a pair of electrons. They have pH ranging from 7.1 to 14. They are bitter in taste. They are slippery in nature. They turn red litmus blue.
Daphne is a pilot for a package delivery service. As her plane takes off and travels away from the Earth’s surface, its gravitational potential energy increases. Which three factors affect the plane’s gravitational potential energy?
Answer:
its height relative to some reference point, its mass, and the strength of the gravitational field
Explanation:
Gravitational energy is the potential energy associated with gravitational force, such as elevating objects against the Earth’s gravity. The potential energy due to elevated positions is called gravitational potential energy.
The factors that affect an object’s gravitational potential energy are the following; its height relative to some reference point, its mass, and the strength of the gravitational field it is in. For instance, consider a wallet lying on a table, it has less gravitational potential energy than the same wallet lying on top of a taller cupboard, and yet lesser gravitational potential energy than a heavier wallet lying on the same table.
If an object lies at a certain height above the Moon’s surface, it has less gravitational potential energy than the same object lying at the same height above the Earth’s surface because the Moon’s gravitational force is weaker.
The SI unit that can be used to express mass is ?
Answer:
why cant I see the picture on my screen
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: