Answer:
Explanation:
Atoms are neutral; they contain the same number of protons as electrons. A neutral sodium atom, for example, contains 11 protons and 11 electrons. Atoms that gain extra electrons become negatively charged.
If 120 g of iron(III) chloride reacts with 82 g of hydrogen sulfide
according to the following reaction:
2FeCl3 + H2S → 2FeCl2 + 2HCl+S , then which of the
following statements is true?
which of the following
groups of elements are all
metallic
Answer:
metallic element are those ones from group 1 to group 3
your answer would be - aluminum, copper, potassium
(even though you didn't list the options)
PLEASE HURRY. compare the reactivitys of potassium and gold metals toward water, what happens when SO2 reacts with water?? write chemical
Answer:
See Explanation
Explanation:
The reactivity of a metal towards water depends on the position of the metal in the electrochemical series. Metals that are high up in the series do react violently and spontaneously with water. Metals that are lower in the series are sometimes unreactive in water.
Hence, potassium reacts very rapidly with water to yield KOH and hydrogen gas while gold does not react with water.
SO2 react with water to form sulphuric acid hence SO2 is called an acid anhydride.
The reaction occurs in the following steps;
2SO2(g) + O2(g) ------->2SO3(g)
SO3(g) + H20(l) ------>H2SO4(aq)
1. For the reaction below, which change would cause the equilibrium
to shift to the right?
CH.(g) + 2H,S(g) + heat
CS,(g) + 4H,(g)
(a) Decrease the concentration of H,S.
(b) Increase the pressure on the system.
(c) Increase the temperature of the system.
(d) Increase the concentration of CS,
(e) Decrease the concentration of CH,
can someone also help me answer the rest of the questions so i can check my work thank you
Answer:
option A
decrease in the concentration will light up the reaction so it will shift to right side
HURRY I DONT HAVE TIME
Arrange the waves from highest energy to lowest energy.
Need the following questions answered please and thank you
On a separate page, describe the advantages and disadvantages of the model of human homeostasis used in gizmo . In what way is the model realistic ? What factors are no included in the model PLEASE HELP ILL GIVE YOU BRAINLIEST please I need help
Solution :
Homeostasis of a human body refers to the ability of the body to maintain the stable internal conditions of the changing environment. It help an organism to survive.
The Human Homeostasis Gizmo helps a person to explore and see the human body adapts itself at a nearly constant temperatures in various conditions.
The advantages of the model of the human homeostasis used in the gizmo is that it can explore and predict how the human body maintains its normal condition as to approximation. One of the disadvantage is that it cannot predict the actual conditions for the survival of the organisms that it needs to maintain its body temperature or conditions.
If the frequency is doubled and the speed is kept constant,
which of the following is true about wavelength?
a. wavelength will not change
b. wavelength will also double
c. wavelength will decrease to half its value
d. wavelength will be 3 times larger.
(science)
Answer:
done
Explanation:
A balloon contains 20.0 L of helium in the morning when the temperature is
23.0°C. By afternoon, the temperature has increases to 45.0°C. What is the new
volume of the balloon? *
O 21.49 L
39.13 L
0 0.02 L
Answer:
[tex]\boxed {\boxed {\sf 39.13 \ Liters}}[/tex]
Explanation:
We want to find the new volume given the temperature, so we use Charles's Law. This states the volume of a gas is directly proportional to the temperature. The formula is:
[tex]\frac {V_1}{T_1}=\frac{V_2}{T_2}[/tex]
We know the original volume is 20.0 liters and the temperature is 23.0 degrees Celsius. The temperature changes to 45.0 degrees Celsius, but we don't know the new volume. Substitute the known values into the formula.
[tex]\frac {20.0 \ L}{23.0 \textdegree C}=\frac{ V_2}{45.0 \textdegree C}[/tex]
We are solving the new volume, so we need to isolate the variable V₂. It is being divided by 45.0 degrees Celsius. The inverse of division is multiplication, so we multiply both sides by 45.0 °C.
[tex]45 \textdegree C *\frac {20.0 \ L}{23.0 \textdegree C}=\frac{ V_2}{45.0 \textdegree C}* 45 \textdegree C[/tex]
[tex]45 \textdegree C *\frac {20.0 \ L}{23.0 \textdegree C} = V_2[/tex]
The units of degrees Celsius cancel.
[tex]45 *\frac {20.0 \ L}{23.0}= V_2[/tex]
[tex]39.1304348 \ L=V_2[/tex]
If we round to the nearest hundredth, the 0 in the thousandth place tells us to leave the 3.
[tex]39.13 \ L \approx V_2[/tex]
The new volume of the balloon is approximately 39.13 Liters.
If a 1.0 mm of 10.0 NaOH normal is added to a liter of buffer repair in the NaH2O4 Which is 0.042 and Na2HPO4 which is 0.058, how much will PH change
Answer:
Explanation:
Using H-H equation for the NaH2O4/Na2HPO4 buffer:
pH = pKa + log [Na2HPO4] / [NaH2PO4]
Where pKa of this buffer is 7.198, [Na2HPO4] = 0.058M = moles [NaH2PO4] = 0.042M = moles
Replacing:
pH = 7.198 + log [0.058M] / [0.042M]
Initial pH = 7.34
Now, NaOH reacts with NaH2PO4 as follows:
NaOH + NaH2PO4 → Na2HPO4 + H2O
That means, the moles of NaOH are additional moles of Na2HPO4 and subtracted moles of NaH2PO4.
The moles of NaOH added:
1.0mm³ = 1.0x10⁻³L * (10mol / L) = 0.01 moles
NaH2PO4:
0.042mol - 0.010mol = 0.032moles
Na2HPO4:
0.058mol + 0.010mol = 0.068moles
Replacing in H-H equation:
pH = 7.198 + log [0.068M] / [0.032M]
Final pH = 7.53
Change in pH = 7.53 - 7.34
The change in pH is 0.19 units
Q: What statement describes plants in northern and southern states during the summer season? During the summer, the plants in northern and southern states are at their biggest and are in full bloom. Plants in the northern and southern states experience the biggest growth during the summer. The plants in northern and southern states have little changes in the summer due to short and mild winters. The plants in the northern and southern states during the summer receive the most sunlight and experience a growth period.
Answer:
The plants in the northern and southern states during the summer receive the most sunlight and experience a growth period.
Explanation:
The plants in the northern and southern states during the summer receive the most sunlight and experience a growth period because in the summer season, plants receive more solar radiation as compared to winter season. Plant needs more solar radiation for higher growth. Photosynthesis is the process which helps the plant to produce more vegetation and this will only happens when the sunlight is high so we can say that summer season enables the plant to have more vegetative growth.
Answer: b
Explanation none
i made this up dont listen to me
7) The mass of an electron is approximately equal to 1/1368 of the mass of
A) a positron
B) a proton
C) an alpha particle
D) a beta particle
Answer:B
Explanation:
What evidence is there that Potential energy is entering the system
Answer:
in particular 69-189 084 = 9283983
Drain Cleaner has an pH of 11. What is its pOH?
Answer:
To find the pOH, simply subtract the pH from 14. In order to calculate the pOH, take the negative log of the hydroxide ion concentration.
Explanation:
Hope this helps :3
Consider the reaction below.
2 upper I superscript minus (a q) plus upper C l subscript 2 (g) right arrow 2 upper C l minus (a q) plus upper I subscript 2 (a q).
Which half reaction correctly describes the reduction that is taking place?
Upper C l subscript 2 9 g) plus e superscript minus right arrow 2 upper C l superscript minu (a).
Upper C l subscript 2 (g) plus e superscript minus right arrow 2 upper C l superscript minus (a q).
2 upper I superscript minus (a q) right arrow upper I subscript 2 (a q) plus 2 e subscript minus.
2 upper I superscript minus (a q) right arrow upper I subscript 2 (a q) plus e superscript minus.
Answer:
2 e⁻ + Cl₂(g) → 2 Cl⁻(aq)
Explanation:
Let's consider the following balanced redox equation.
2 I⁻(aq) + Cl₂(g) → 2 Cl⁻(aq) + I₂(aq)
We can identify 2 half-reactions:
Oxidation: 2 I⁻(aq) → I₂(aq) + 2 e⁻
Reduction: 2 e⁻ + Cl₂(g) → 2 Cl⁻(aq)
We can identify the second half-reaction as the reduction reaction because Cl₂ gains 2 electrons and its oxidation number decreases from 0 to 1-.
Answer:
A
Explanation:
It's A
2) A solution consists of 0.50 mole of CaCl2 dissolved i
100. grams of H20 at 25°C. Compared to the boiling
point and freezing point of 100. grams of H20 at
standard pressure, the solution at standard pressure
has
(A) a higher boiling point and a lower freezing
point
(B) a lower boiling point and a lower freezing point
(C) a lower boiling point and a higher freezing
point
(D) a higher boiling point and a higher freezing
point
3) Which solution has the highest boiling point at
A. a higher boiling point and a lower freezing point
Explanation:
hope this helps :)
i need an essay about bow water bottles are ruining the earthh please ill give u a brainly
Answer:
Explanation:
Each bottle leaks harmful chemicals into our environment along the way as it decomposes. Studies show that the toxins decomposing bottles of water leach into our environment cause a variety of health issues, including reproductive problems and cancer.
PLEASE MARK AS BRAINLIEST ANSWER
Calculate the volume (liters) of solution that can be prepared from 180. grams of K2Cr2O7 for a 0.200M solution.
Answer:
The volume of the solution is 0.305 liters.
Explanation:
Molar mass is the amount of mass that a substance contains in one mole. The molar mass of K₂Cr₂O₇ is 294 g / mole. Then you can apply the following rule of three: if by definition of molar mass 294 grams of the compound are contained in 1 mole, 180 grams are contained in how many moles?
[tex]moles=\frac{180 grams*1mole}{294 grams}[/tex]
moles= 0.61
Molarity is a measure of the concentration of a substance that is defined as the number of moles contained in a certain volume. So, the molarity of a solution is calculated by dividing the moles of the solute by the volume of the solution:
[tex]molarity=\frac{number of moles of solute}{volume}[/tex]
Molarity is expressed in units [tex]\frac{moles}{liter}[/tex].
In this case:
molarity= 2 Mnumber of moles of solute= 0.61 molesvolume= ?Replacing in the definition of molarity:
[tex]2 M=\frac{0.61 moles}{volume}[/tex]
Solving:
[tex]volume=\frac{0.61 moles}{2 M}[/tex]
volume= 0.305 liters
The volume of the solution is 0.305 liters.
3
3) Write any 4 important of
4 important of measurement
Science
Answer:
A measurement is the action of measuring something, or some amount of stuff. So it is important to measure certain things right, distance, time, and accuracy are all great things to measure. Measurements can also allow us to make desicions based on the outcome of the measurement
Caffeine freezing point and boiling point?
NO LINKS
Answer:
The melting point of caffeine is 235°C and the boiling point is 178°C (4).
Explanation:
Petroleum is a mixture of hydrocarbons. It is separated into useful fractions by fractional distillation.
Which property does fractional distillation rely on to separate petroleum?
Explanation:
Fractional distillation is used to separate crude oil into simpler, more useful mixtures . This method can be used because different hydrocarbons have different boiling points
Hope this help u
You have two solutions and want to find how two chemicals react. Solution A has 100 mL of 1.0 M particle A. Solution B has 100 mL of 1.0 M particle B. You combine the two solutions and find the new concentrations of A and B to both be 0.50 M.
Answer:
There was no reaction
Explanation:
1.Did a reaction occur? Explain your answer. If a reaction occurred, also provide a possible chemical equation describing the reaction.
When a reaction occurs, the initial moles of each species decreases to produce a determined product. If the initial moles of reactant = final moles there was no reaction:
Initial moles A:
0.100L * (1.0mol / L) = 0.100 moles A
Final moles A:
0.200L * (0.5mol / L) = 0.100 moles A
Initial moles B:
0.100L * (1.0mol / L) = 0.100 moles B
Final moles B:
0.200L * (0.5mol / L) = 0.100 moles B
As the moles in the beginning = Moles after the mixture
There was no reaction
Does indium react with acid?
How many moles are in 56.54 liters of CO2?
I give Brainliest!
im I wrong on this question?
Answer:
I don't think so
Explanation:
That's what I got
How do you maximize the products of chemical reactions?
Answer:
1. increase the temperature
2. increase the concentration of reactants
3. increase the surface area of the reactants
4. use a catalyst
5. remove the product as it's formed
Explanation:
for a chemical reaction to take place, the bonds between atoms in the reactants are broken, the atoms rearrange and new bonds between the atoms are formed to make the products.
Which of the following molecules is polar?
Group of answer choices
CF4
CH4
CH3Cl
CO2
Answer
CH3Cl is polar amoungst the choices
What is the concentration of a 2500 milliliter solution that contains 7.5 moles of CaCO3? (Hint: there are 1000 milliliters (mL) in 1 liter (L) )
Answer:
M = 3.0 M.
Explanation:
Hello there!
In this case, according to the definition of molarity, it turns out possible for us to calculate the required molar concentration of the given volume of solution and moles of solvent by knowing they are divided as follows:
[tex]M=\frac{n}{V}[/tex]
However, since the volume is in liters, we first convert the 2500 mL to L and then calculate the resulting molarity as shown below:
[tex]V=2500mL*\frac{1L}{1000mL} =2.500L\\\\M=\frac{7.5mol}{2.500L}\\\\M=3.0M[/tex]
Whereas M stands for molar units of mol/L.
Regards!
How does La Niña affect the climate of the Pacific Ocean?
1.The warm water moves toward the east.
2.The cold water sinks deeper into the ocean.
3.The ocean becomes cooler.
4.The strength of the prevailing winds decreases
The statement in which La Niña affect the climate of the Pacific Ocean is "The cold water sinks deeper into the ocean."
What is La Niña effect?La Niña is a climate phenomenon that depicts the cooling of surface ocean waters along the coast of South America's tropical west coast.
What is climateThe average weather in a certain place over a longer length of time is referred to as climate.
The jet stream moves northward and weakens across the eastern Pacific as a result of La Niña. The South experiences warmer and drier weather than usual during La Nia winters. The North and Canada are wetter and colder than the rest of the country. The seas off the Pacific coast are cooler and contain more nutrients than typical during La Niña.
Water in the eastern Pacific is colder than typical because to La Niña. El Niño might cause the water to be warmer than usual in the same place. During La Niña years, drought-stricken areas are drenched, while El Niño years are drenched.
Hence the correct option is 2.
Learn more about climate here
https://brainly.com/question/10440860
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Plz help! NO FAKE ANSWERS PLEASE
Different types of radioactive decay cause different changes to an atom's nucleus. Use the periodic table to match the change in each atom to the type of decay. Drag each tile to the correct box.
Answer:
Read the previous one as it is correct.
Explanation: