Answer:Endothermic reactions draw heat into the reaction. Heat is transferred from the surroundings into the reaction. The reaction heats up while the surroundings cool down.
Explanation: ice melting in a glass of water would be an example of an endothermic reaction. The ice pulls heat from the water, cooling the water down, but causing the ice to heat up making the ice melt.
1. Draw what you think happened with the water molecules and the molecules in the food-coloring dyes during chromatography. 2. Include a key that will help another scientist understand your model. 3. Label the parts of your model. 4. Use arrows if needed.
PLEASE HELP ME WHOEVER HELPS ME WITH THIS I WILL MAKE BRAINLIEST I SWEAR I WILL. also i need help with the molecule part so please help me
Answer:
we cant draw on drainly and we cant upload a pic cause we cant share links on here
Explanation:
whats the relationship between lichens and quality
Answer:
Lichens love clean air
Explanation:
Lichens love clean air too - in fact, their sensitivity to air pollution means they make great air quality indicators. Like small signposts, these curious organisms can tell us a lot about the air we are breathing.
PLZ ANSWER FAST LOL:If the magnets are aligned will the spacecraft and launcher repel, attract, or do both?
Answer:
Explanation:
The answer depends, if they are at opposite poles they will attract but if they are at the same pole they will repel
Question 7 (5 points)
(05.01 LC)
One mole of zinc has a mass of 65.4 grams. Approximately how many atoms of zinc are present in one mole of zinc?
Answer:
6.02 x 10²³ atoms
Explanation:
The number of moles present in 1 mole of zinc will be 6.02 x 10²³ atoms. This is because a mole of any substance contains the Avogadro's number of particles which is 6.02 x 10²³ atoms.
A mole is simple a convenient way of estimating the number particles within a substance.
So every 1 mole of a substance contains the same number atom in there.
For the give zinc, since it is 1 mole, it will contain 6.02 x 10²³ atoms
they've changed the answer, but 6.02 x 1023 is still right. the new answer is just 6 x 1023.(6.02 rounded to the nearest integer)
which statement describes the movement of carbon dioxide in the carbon cycle?
The motion of objects in regard to other objects is called_motion:
-curved
-straight
-slow
-fast
-relative
How many molecules are there in 0.655 moles of CH_2?
Answer:
Not sure about this one, sorry
Explanation:
HELP ASAP pls will give brainlist
Answer:
Fe ^2+ + MnO - 4 → Fe 3+ + Mn 2+
Explanation:
Explanation:
You follow a series of steps in order:
Identify the oxidation number of every atom.
Determine the change in oxidation number for each atom that changes.
Make the total increase in oxidation number equal to the total decrease in oxidation number.
Place these numbers as coefficients in front of the formulas containing those atoms.
Balance all remaining atoms other than
O
and
H
.
Balance
O
.
Balance
H
.
Check that atoms and charges balance.
Here's how it works. Your unbalanced equation is
The table above shows the ionic charges of several elements. Which element listed below is most similar to oxygen (O) in that it will form an ion with a 2- charge?
A. Phosphorus (P)
B.Helium (He)
C. Beryllium (Be)
D. Sulfur (S)
Answer:
Long range
Explanation:
A. But not too sure
Ions can be made by single element or covalently bonded group of elements. The covalently bonded group of elements is called polyatomic ions or polyatomic atoms. Therefore, the correct option is option D.
What is Ions?Any species that contain charge whether it is positive charge or negative charge is called ions. The example of polyatomic ions are sulfate, phosphate, nitrate etc.
Cation ion is the species that loose electron and attain positive charge while anion is a species which gain electron and attains negative charge so when anion and cation combine in fixed ration the the overall charge of the molecule is zero that is molecule is neutral, the charge over cation and anion is also called oxidation state. Sulfur (S) exist as S⁻² as ion which is similar to O²⁻.
Therefore, the correct option is option D.
To learn more about ions, here:
https://brainly.com/question/13692734
#SPJ6
Can somebody help me with this math.
helppppppppppppppppppppp
Answer:
Formation of sedimentary rocks
Explanation:
I believe this is correct, May I get a brainliest???
Structural Formulas for Covalent Molecules
Is anyone good at doing these because I am so confused
1) C2H4
2) C3Cl8
3) SCl2
4) HClO2
5) HNO2
6) H2SeO3
7) H2S2
8) C2H6O2
9) C2H7N
10) C2NH3
11) C2PSH3
12) CH2O2PN
13) C2H2S
14) CH2O
15) N2H2
Answer:
CFJA17THZ561GJA561GH68N461DG56BSJ57
HOPE IT HELPS THANK ME LATER.
You have 9.3 mL of a 0.031 M solution of NaOH. If you add this solution to 8.5 mL of a 0.012 M solution of crystal violet, what is the initial concentration of NaOH in the reaction mixture?
Answer:
0.016M is the initial concentration of NaOH in the reaction mixture
Explanation:
The NaOH is diluted from 9.3mL to 9.3mL + 8.5mL = 17.8mL. That is a dilution of:
17.8mL / 9.3mL = 1.914 times
As the initial concentration of the NaOH solution is 0.031M and is diluted 1.914 times, the final concentration of the NaOH solution is:
0.031M / 1.914 =
0.016M is the initial concentration of NaOH in the reaction mixture
can you help me balance this
Balanced equation
Mg₃(PO₄)₂ + 2Al(NO₃)₃ → 3Mg(NO₃)₂ + 2AlPO₄
Further explanationGiven
Reaction
Mg3(PO4)2 + Al(NO3)3 → Mg(NO3)2 + AlPO4
Required
Balanced equation
Solution
Give a coefficient :
Mg₃(PO₄)₂ + aAl(NO₃)₃ → bMg(NO₃)₂ + cAlPO₄
Make an equation :
Mg, left = 3, right=b⇒b=3
P, left=2, right=c⇒c=2
Al, left=a, right=c⇒a=c⇒a=2
The reaction becomes :
Mg₃(PO₄)₂ + 2Al(NO₃)₃ → 3Mg(NO₃)₂ + 2AlPO₄
lil give brainly 20 points
Answer: i would say producer
Explanation:
Answer:
a
Explanation:
Pls do it I don’t understand
Why is it important that sulfur dioxide is not released into the atmosphere?
Answer:
Acid rain.
Explanation:
What form is the carbon prior to the lion eating the giraffe?*
1 point
Carbon dioxide
Sugar
Nitrogen
Answer:
Sugar
Explanation:
The carbon is in form of sugar prior to the lion eating the giraffe. This form of carbon in the giraffe serves as a rich source of nutrient for the lion.
The carbon enters living organisms as carbon dioxide. As it enters, it is converted by plants into glucose, a from of sugar.
When giraffes eats the glucose in plant, it is stored in them and used for the liberation of energy
This same stored chemical energy in the giraffe is taken up by the lion.
What is the mass, in grams, of MgCl2 is consumed when 255g Mg(OH)2 is produced?
MgCl2 + 2 LiOH → Mg(OH)2 + 2 LiCl
416 g MgCl₂
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableStoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
[RxN - Balanced] MgCl₂ + 2LiOH → Mg(OH)₂ + 2LiCl
[Given] 255 g Mg(OH)₂
[Solve] x g MgCl₂
Step 2: Identify Conversions
[RxN] 1 mol MgCl₂ → 1 mol Mg(OH)₂
[PT] Molar Mass of Mg - 24.31 g/mol
[PT] Molar Mass of O - 16.00 g/mol
[PT] Molar Mass of H - 1.01 g/mol
[PT] Molar Mass of Cl - 35.45 g/mol
Molar Mass of Mg(OH)₂- 24.31 + 2(16.00) + 2(1.01) = 58.33 g/mol
Molar Mass of MgCl₂ - 24.31 + 2(35.45) = 95.21 g/mol
Step 3: Stoichiometry
Set up conversion: [tex]\displaystyle 255 \ g \ Mg(OH)_2(\frac{1 \ mol \ Mg(OH)_2}{58.33 \ g \ Mg(OH)_2})(\frac{1 \ mol \ MgCl_2}{1 \ mol \ Mg(OH)_2})(\frac{95.21 \ g \ MgCl_2}{1 \ mol \ MgCl_2})[/tex]Multiply/Divide: [tex]\displaystyle 416.227 \ g \ MgCl_2[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
416.227 g MgCl₂ ≈ 416 g MgCl₂
6) Which of the following is the highest pressure?
A. 1000 atm
b. 1000 mmHg
C. 1000 torr
C3H8 + 5O2 → 3CO2+ 4H2O, if 5.75L of oxygen are consumed in the above reaction, how many L of carbon dioxide are produced?
Answer: 3.45 L carbon dioxide are produced
Explanation:
According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.
To calculate the moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given volume}}{\text {Molar volume}}=\frac{5.75L}{22.4L}=0.257moles[/tex]
[tex]C_3H_8+5O_2(g)\rightarrow 3CO_2+4H_2O[/tex]
According to stoichiometry :
5 moles of [tex]O_2[/tex] produce = 3 moles of [tex]CO_2[/tex]
Thus 0.257 moles of [tex]O_2[/tex] will produce=[tex]\frac{3}{5}\times 0.257=0.154moles[/tex] of [tex]CO_2[/tex]
Volume of [tex]CO_2=moles\times {\text {Molar volume}}=0.154moles\times 22.4L/mol=3.45[/tex]
Thus 3.45 L carbon dioxide are produced
Greenhouse gasses help Earth's energy budget stay balanced. They absorb radiation from the sun which traps heat close the surface. Without
greenhouse gasses our planet would be too cold. Too many green house gasses could cause our planet to heat up.
True or False
Answer:
true
Explanation:
because of gravity hahah
_is a change in direction or speed
-velocity
-force
-deceleration
-mass
-acceleration
in multicellular organisms groups of cells that work together are called:______.
Answer:
In multicellular organisms groups of cells that work together are called tissues.
A missile is flying at a speed of 125 m/s. If the missile has a mass of 125 kg, what’s its kinetic energy?
976,563 is the answer I got to your question
Answer:
976 563
Explanation:
Hope you get it right thou
Which of the following operations usually makes a substance dissolve faster
in a solvent (select ALL that apply)?
A.raising the temperature
B.lowering the temperature
C.agitation
D.crushing the substance to a powder
Answer:
I think it is agitation
Explanation:
PLZ PLZ PLZ HELPP
1. If you have 4 dozen eggs, how many eggs do you have?
2. If you have 4 moles of gold atoms, how many atoms do you have?
Answer:
1. 48 2. uhhh molar mass of gold/avogadro's number = 4 moles so guess
Explanation:
Answer:
1. 48 2. uhhh molar mass of gold/avogadro's number = 4 moles so guess
Explanation:
balance the following generic chemical equation
ABC3+D-D(BC3)2+A
The balanced equation
2ABC₃+D⇒D(BC₃)₂+2A
Further explanationGiven
ABC3+D-D(BC3)2+A
Required
Balanced equation
Solution
Give a coefficientaABC₃+bD⇒D(BC₃)₂+cA
Make an equationD, left=b, right=1⇒b=1
B, left=a, right=2⇒a=2
A, left=a, right=c⇒a=c⇒c=2
The equation becomes :
2ABC₃+D⇒D(BC₃)₂+2A
What does the cardiovascular system do
for the human body?
Answer: The blood circulatory system (cardiovascular system) delivers nutrients and oxygen to all cells in the body.
Explanation:
why the times of moonrise for full and new moon are inverted.
Thank you :)