How can we find life on other planets?
Through satellites...
does anyone know the answer to this
The worst feeling is when you are hurting so badly inside but not a single tear comes out.
Anyone relate?
I know i can.
Answer:
chemistry wow
Explanation:
Please help on question 7 and 8, i really need help and this is for marks! I only have 9 min left i will mark brainliest to whoever gives the best answer!
Answer:
I'm going to go with conduction
Explanation:
At first I thought it was combustion but I read the problem incorrectly. It seems like the liquid boils after you put them on the hot plate.
It's most likely conduction because heat and energy is being transferred into the liquid from the hot plate
Ecosystems are self-sustaining. They naturally recycle resources without human intervention. Do you think this is true for a pop- bottle biome?
Answer:
yes. For a pop bottle biome to be self sustaining it needs a water cycle, mineral cycle, solar energy flow, and a balance.
Explanation:
hope this helps
Answer:
I would say no because you have to add water and other recourses for it to grow and work
Explanation:
Ellie started her reaction between the KMnO4 and malonic acid by first heating the two solutions in the hot water bath. She then removed the test tubes from the water bath and poured the KMnO4 into the 75-mL test tube containing the malonic acid. She mixed the solution, placed it back into the water bath, then started the timer. For the data collected at 75 oC, indicate how the process explained above impacts the reaction time.a. The time recorded in the lab notebook is the true reaction time because the reaction only starts after the timer is started b. The time recorded in the lab notebook is longer than the true reaction time because the reaction starts the moment the two solutions were mixed c. The time recorded in the lab notebook is the true reaction time because the reaction only starts after the mixture is placed back into the hot water bath d. The time recorded in the lab notebook is shorter than the true reaction time because the reaction starts the moment the two solutions were mixed
Answer:
The time recorded in the lab notebook is shorter than the true reaction time because the reaction starts the moment the two solutions were mixed
Explanation:
A chemical reaction is "a process that involves rearrangement of the molecular or ionic structure of a substance, as distinct from a change in physical form or a nuclear reaction" (Oxford dictionary).
A chemical reaction begins immediately the reactants are mixed together in a reaction vessel because the particles of the reactants immediately begin to collide with each other. There is no lost time before reactions begins!
This implies that, the time recorded in the lab notebook is shorter than the true reaction time because the reaction starts the moment the two solutions were mixed.
Answer:
the first one is B. and E. and the second is A., B., and D. on edge 2023
Explanation:
What is the ionic charge for the lead ion in PbS2?
Answer:
[tex]\boxed {\boxed {\sf +4}}[/tex]
Explanation:
Lead (Pb) has 2 positive oxidation states, +4 and +2.
Sulfur (S) has 3 oxidation states: +6, +4, and -2. Since lead creates a positive ion, sulfur must be a negative ion to balance the charges.
There are 2 atoms of sulfur, each with a charge of -2. Therefore, their overall charge is -4, because 2* -2= -4.
A compound has a net charge of 0. To achieve this, lead must have a charge of +4 to balance out the -4 charge of sulfur.
Lead has a +4 ionic charge in PbS₂
Which affects both deep water and surface currents in the ocean? the wind the temperature of the water the Coriolis effect None of the above
Answer:
the wind and the temperature of water both drive ocean currents
Answer:
B. Write 'T' for true or 'F' for false statements :
1. Publisher works only with document in fixed shapes and sizes.
2. Viewing tools are only for editing purpose.
3. Text box icon is found in Styles group.
4. Publisher does not allow you to add images to your document.
5. Margin guides are blue lines that mark the edges.
water
air
multiple cells
a place to live
Answer:
I guess it WATER
how do I do this I’m confused
by using pro.gram..
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[tex]{\huge{\purple{\underline{\underline{✎﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏}}}}}[/tex]
Aqueous hydrochloric acid HCl will react with solid sodium hydroxide NaOH to produce aqueous sodium chloride NaCl and liquid water H2O. Suppose 15.7 g of hydrochloric acid is mixed with 27. g of sodium hydroxide. Calculate the maximum mass of sodium chloride that could be produced by the chemical reaction.
Answer:
25.155 gram
Explanation:
HCl(aq.) + NaOH(aq.) ⇒ NaCl + H2O
According the above equation equal number of moles of reactant are producing same number of moles of products.
Now, no. mole of HCl = 15.7/(1+35.5) = 0.43 moles
no. of moles of NaOH = 27/(23+16+1) = 0.675 moles
Since the amount of sodium hydroxide exceeds the amount of hydrochloric acid, the maximum amount of each substance participating in the reaction is HClν ν 0.43 moles .Therefore, the maximum amount of NaCl that can be produced is as follow
= (23+35.5)×0.43 = 25.155 gram
When the following equation is balanced, what is the coefficient of oxygen?
C2H5OH() + O2(g) --> CO2(g) + H2O()
Answer:
The answer is 3
C2H5OH + O2 CO2 +H2O (unbalanced)
C2H5OH +3O2(g). 2CO2(g)+3H2O(balanced)
According to the balanced chemical equation, C₂H₅OH + 3 O₂[tex]\rightarrow[/tex] 2 CO₂ + 3 H₂O the coefficient of oxygen is three.
What is chemical equation?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.
Learn more about chemical equation,here:
https://brainly.com/question/28294176
#SPJ2
Hydrocyanic acid is a weak acid. Therefore, the salt KCN is
Question 4 options:
Basic
Amphoteric
Neutral
Acidic
What is the relationship between radius and diameter
Answer:
the radius is half the diameter
The radius of a circle is equal to half the diameter.
Help me I’m struggling with this one
Answer:
Eukarya
Explanation:
It's larger than a prokaryotic cell and it has a nucleus.
Predict the shape of the molecule....
Answer: trigonal bipyramidal
Explanation:
Number of electron pairs = [tex]\frac{1}{2}[V+N-C+A][/tex]
V = number of valence electrons present in central atom
N = number of monovalent atoms bonded to central atom
C = charge of cation
A = charge of anion
[tex]SbCl_5[/tex] :
In the given molecule, antimony is the central atom and there are five chlorine as monovalent atoms.
The number of electron pairs are 5 that means the hybridization will be [tex]sp^3d[/tex] and geometry of the molecule will be trigonal bipyramidal.
15 points will mark brainliest
Hydrazine (N2H4) and dinitrogen tetroxide (N2O4) form a self-igniting mixture that has been used as a rocket propellant. The reaction products are N2 and H2O. Part A Write a balanced chemical equation for this reaction. Express your answer as a chemical equation. nothing A chemical reaction does not occur for this question. Request Answer Part B What is being oxidized, and what is being reduced
Answer:
2N₂H₄+N₂O₄→3N₂+4H₂O; N₂H₄ gets oxidized, N₂O₄ gets reduced.
Explanation:
Part AThey tell us what substances react to form what products, so we can write an unbalanced chemical equation from those substances.
N₂H₄+N₂O₄→N₂+H₂O
To balance this equation, we need to make it so there is an even amount of each element on both sides of the reaction. We can do this by multiplying the amount of each substance by adding a coefficient in front of it.
2N₂H₄+N₂O₄→3N₂+4H₂O
Part BTo identify what is being oxidized and what is being reduced, look at the oxidation charges of each element.
N₂H₄ gets oxidized, N₂O₄ gets reduced.
What is the correct sequence of chemical transformations with the correct phases?
Answer:
1. Cu(s) 2. Cu(NO3)2 (aq) 3. Cu(OH)2 (s) 4. CuO (s) 5. CuSO4 (aq) 6. Cu(s)
Explanation:
Which aquatic organism would be least likely to survive in a <7 pH environment?
protozoa
worms
algae
bacteria
What part of the food. chain is a pine?
a:primary consumer
b:secondary consumer
c:herbivore
d:producer
Answer:
producer
Explanation:
What is the molarity of a 3.00 L solution that contains 0.400 mol FeCl3?
1.20 M
0.266 M
7.50 M
0.133 M
Answer: 0.133 mol/l
Explanation: molality = concentration = 0.400 mol/3.0 l
Ok so N2+O2=2NO and my delta h is 180.5 kJ I need to know. If I react 10 g of nitrous gas with excess oxygen how many grams of Nitrogen monoxide will be produced
Answer:
21.6 grams
Explanation:
N₂ + O₂ → 2NOFirst we convert 10 g of N₂ into moles, using its molar mass:
10 g ÷ 28 g/mol = 0.36 mol N₂Then we convert 0.36 moles of N₂ into moles of NO, using the stoichiometric coefficients of the balanced reaction:
0.36 mol N₂ * [tex]\frac{2molNO}{1molN_2}[/tex] = 0.72 mol NOFinally we convert 0.72 NO moles into grams, using its molar mass:
0.72 mol NO * 30 g/mol = 21.6 gSally has constructed a concentration cell to measure Ksp for MCln. She constructs the cell by adding 2 mL of 0.05 M M(NO3)n to one compartment of the microwell plate. She then makes a solution of MCln by adding KCl to M(NO3)n. She adds 8.138 mL of the resulting mixture to a second compartment of the microwell plate. Sally knows n (the charge on the metal ion) = +2
She has already calculated [Mn+] in the prepared MCln solution using the Nernst equation. [Mn+] = 8.279 M
Required:
How many moles of [Cl-] must be dissolved in that compartment?
Answer:
0.13475 mol
Explanation:
From this question sally knows that n= 2
MCln = MCl
[Mn+] using nernst equation = 8.279
The volume of the resulting mixture Mn+ = 8.138 ml
The number of moles mn+ =
8.279 x 8.138
= 67.375mmol
= 0.067375
Since n = 2
The mold of cl- that must be dissolved in the compartment
= 0.067375 x 2
= 0.13475 mols
What is the molarity of ZnCl, that forms when 20.0 g of zinc completely reacts with CuCl2, according to the following reaction? Assume a final
volume of 285 mL
Zn(s) + CuCl2(aq) → ZnCl2(aq) + Cu(s)
The distances from large bodies of water will affect the average rainfall of an area. (Example: Florida has more rain than Nevada) *10 points
A. True
B. False
Answer:
A
Explanation:
2. How many grams are in 2.05 x 1030 atoms of Lithium (Li)?
how many moles are 20 grams of Helium ?
Answer: The correct answer is 5.00 moles
Explanation:
Help please
Lunar eclipses happen when the _____.
moon passes between the Earth and the sun
Earth passes between the sun and the moon
sun passes between the Earth and the moon
Answer:
mook passes between the earth and sun
7. What volume does a sample of 1.5 x 1023 atoms of helium at STP represent?
a) 5.6 liters b) 11.2 liters c) 17.8 liters d) 22.4 liters
Answer:
a) 5.6 L
Explanation:
Step 1: Given data
Atoms of helium: 1.5 × 10²³ atoms
Conditions: Standard temperature (273.15 K) and pressure (1 atm)
Step 2: Calculate the moles corresponding to 1.5 × 10²³ atoms
To convert atoms to moles, we will use Avogadro's number: there are 6.02 × 10²³ atoms of helium in 1 mole of atoms of helium.
1.5 × 10²³ atoms × 1 mol/6.02 × 10²³ atoms = 0.25 mol
Step 3: Calculate the volume of 0.25 moles of He at STP
At STP, 1 mole of helium occupies 22.4 L.
0.25 mol × 22.4 L/1 mol = 5.6 L