Answer:
The weight changes, but his or her mass does not.
Explanation:
The true statement from the given choices about an astronaut traveling from planet to planet is that the weight changes but his or her mass does not.
This is due to the difference in acceleration due gravity from one planet to the other.
Mass is the amount of matter present within a substance. Weight is the vertical force on a body due to its mass and acceleration due gravityGravity from one planet to the other differs significant and so is the weight.
Why is methanol more soluble in water than butanol
Answer:
Explanation: The longer the alkyl chain, the less soluble in water is the alcohol. Methanol and ethanol are infinitely miscible in water; propanol and butanol have limited solubility. ... Hydrogen bonding with water thus becomes less viable, and solubility of the long-chain alcohol IN WATER decreases.
Explanation:
3
Which two elements are the most abundant in the Earth's crust?
OA. iron and magnesium
B. iron and nickel
Oc. silicon and magnesium
OD. silicon and oxygen
Novomatlan
Yes
Answer:
Look at the properties of Oxygen and Silicon - the two most abundant elements in the Earth's crust - by clicking on their symbols on the Periodic Table.
Explanation:
Answer:
D. silicon and oxygen
Explanation:
The most abundant elements on the earth's crust are silicon and oxygen. Silicon and oxygen forms a wide range of silicate minerals they are found in the crust.
There are many silicates which are derived from the basal units of silicon and oxygen combining together. Other atoms or elements then combines with the silicate framework.
Oxygen is about 46% abundant in the crust whereas silicon takes about 28% to be the second most abundant element on the crust.
Silicate minerals abounds in rocks and within the soil.
In which of the following locations are bacteria often found?
Answer:
in the air and soil
in drinking water
on and inside the human body
Explanation: Hope that helps
Which of the following represents a solution? *
2 points
NaCl (s)
HCl (aq)
H2O (g)
HBr(g)
Answer:units of G.
Explanation:Milk of magnesia, a suspension of Mg(OH)2
in water, reacts with stomach acid (HCl) in a
neutralization reaction.
Mg(OH)2(s) + 2HCl(aq) −!
2H2O(l) +MgCl2(aq)
What mass of MgCl2 will be produced if
4.55 g of Mg(OH)2 reacts?
Answer in units of g.
021 (part 2 of 2) 10.0 points
What mass of HCl is required to completely
react with 4.55 g of Mg(OH)2?
1.2 dkg to grams now I have to say extra stuff for it to submit
Answer:
12 grams and I have to write something longer so just ignore this
help plz and can you plz use terms
Ionic bonds form between _____ which form positively charged ions and _____ which form negatively charged ions.
ionic bonds form between metals which form positively charged ions and nonmetals which form negatively charged ions.
Which statement best explains the net transfer of energy that is about to
happen in this photo?
A. The racket and the ball will both gain kinetic energy.
B. The ball will gain kinetic energy, and the racket will lose kinetic
energy
C. The racket will gain potential energy, and the ball will lose kinetic
energy
D. The racket and the ball will both lose potential energy
Answer:
Explanation:
B I got it right
Answer:
B. The ball will gain kinetic energy, and the racket will lose kinetic
energy
Explanation:
Which term represents a chemical reaction?
deposition
combustion
sublimation
vaporization
Answer:
vaporization
Explanation:
Which best describes the effect of a ecosystem when populations of white-tailed deer are overhunted by people in an area?
A. It disrupts the balance between predators and prey
B. It decreases the amount of producers
C. It directly increases the population of decomposers
D. It decreases competition for food among carnivores
Answer:
A. It disrupts the balance between predators and prey
Explanation:
The effect on the ecosystem when populations of white - tailed deer are overhunted is that it disrupts the balance between predators and prey within the ecosystem.
The whited - tailed deer is the usually the prey. The carnivores are the cats and other flesh eating animals. When the deer is over-hunted, there are more predators compared to prey. This leads to a serious imbalance and a high level of competition for the scarce prey.
What determines an element's properties?
ANSWER: A. The valence electrons
A. The valence electrons
B. The isotopes it forms
C. Its atomic mass
D. The core electrons
Answer:
b
Explanation:
025 Aqueous barium chloride and aqueous potassium carbonate react to produce solid
barium carbonate and aqueous potassium chloride.
A25
I need the balanced chemical equation for this
The balanced equation
BaCl₂(aq)+ K₂CO₃(aq)--> BaCO₃(s) + 2KCl(aq)
Further explanationGiven
word equation
Required
Balanced equation
Solution
Convert to chemical equation :
Reaction
BaCl₂(aq)+ K₂CO₃(aq)--> BaCO₃(s) + KCl(aq)
Give a coefficientaBaCl₂(aq)+ K₂CO₃(aq)--> bBaCO₃(s) + cKCl(aq)
Make an equationK, left = 2, right = c⇒c=2
C, left = 1, right = b⇒b=1
Ba, left = a, right = b⇒a=b⇒a=1
The equation becomes :
BaCl₂(aq)+ K₂CO₃(aq)--> BaCO₃(s) + 2KCl(aq)
Fe0 + 2H+1 Cl-1 → Fe+2 Cl2 -1 + H20 ↑
De acuerdo con la ecuación planteada si se cambia el hierro Fe por dos moles de sodio Na0 probablemente formará
A. 2NaCl + H2
B. NaCl + H2
C. 2NaH + Cl2
D. NaCl2 + H2
Answer:
A and the answer if we can manage by its formula NaCl H2 but the answer is A
Question 3
True or False. You must convert grams to moles to do stoichiometry.
True
оо
D
False
Answer:
True
Explanation:
Sometimes you will need to convert from grams to moles, or moles to grams
Fe2 O3 = Al =Fe Al2 O3
you will need to be sure to count all of atoms on each side of the chemical equation. Once you know how many of each type of atom you can only change the coefficients (the numbers in front of atoms or compounds) to balance the equation for Aluminum + Iron (II) oxide
Which of the following atoms would have a charge of +1?
An atom with 9 protons, 9 electrons, and 9 neutrons
An atom with 7 protons, 11 electrons, and 8 neutrons
An atom with 5 protons, 5 electrons, and 4 neutrons.
An atom with 6 protons, 5 electrons, and 7 neutrons
Answer: An atom with 6 protons, 5 electrons, and 7 neutrons
Explanation: In this case, neutrons do not matter as they have a charge of 0, or no charge. A proton has a charge of +1 and an electron has a charge of -1. Since there are 6 protons, the total charge of the protons would be +6. Since there are 5 electrons the total charge of the electrons would be -5. +6 - 5 would result in a charge of +1. This means that this atom would have an overall charge of + 1. Basically, if there is one more proton than electron, then the overall charge of the atom will be +1 but if there is one more electron than proton, then the overall charge of the atom will be -1.
What is the balanced chemical equation for Nitric acid with sodium carbonate
Answer:
Nitric acid reacts with sodium carbonateto form sodium nitrate, carbon dioxide and water. 2HNO3+Na2CO3→2NaNO3+CO2+H2O.
Does gasoline (C8H12) have polar or non-polar molecules?
Answer:
non polar molecules
Explanation:
Ethyl alcohol will dissolve in water in all proportions because the polar molecules interact with each other freely. In contrast, gasoline is a nonpolar molecule. hope that helped...
Why must ionic compound have a total charge of 0?
The table shows the recipe and the available ingredients for making the maximum possible number of sandwiches.
Making Sandwiches
Recipe for One Sandwich
Total Ingredients Available
1 cheese slice, 2 lettuce leaves, 2 bread slices Total ingredients available: 8 cheese slices, 6 lettuce leaves, 6 bread slices
If the ingredients represent reactants of a chemical reaction, which of the following represents the leftover reactant?
OTwo cheese slices
Two lettuce leaves
Five lettuce leaves
Five cheese slices
Answer:
5 Cheese Slices
Explanation:
I took the quiz and got it right.
Answer:
Five cheese slice
Explanation:
8-1-1-1=5
25.00 g of the compound is composed of 6.77 g of tin and 18.23 g of bromine. What is the percent by mass of tin in the compound? Show work.
The percent by mass of Tin : = 27.08%
Further explanationGiven
25.00 g of the compound
6.77 g of Tin
18.23 g of Bromine
Required
The percent by mass of Tin
Solution
Proust stated the Comparative Law that compounds are formed from elements with the same Mass Comparison, so that compounds have a fixed composition of elements
%mass X = (mass X/mass sample) x 100%
So %mass of Tin :
= (6.77 g : 25 g) x 100%
= 27.08%
We are slowly learning that even if we react, it won't change anything, it won't make people suddenly love and respespect us, it won't magically change their minds. Sometimes it's better to just let things be, let people go, don't fight for closure, don't ask for explanations, don't expect people to understand where you're coming from. We are slowly learning that life is better lived when you don't center it on what's happening around you and center it on what's happening inside you instead.
Work on yourself and you inner peace.
Answer:
wow ok ill try to
Explanation:
this is the most beautiful thing ive seen all day
thank you
Calculate the sodium ion concentration when 70.0 mL of 3.0
M sodium carbonate is added to 30.0 mL of 1.0 M sodium
bicarbonate.
Answer:
4.5 M Na+
Explanation:
Multiply the molarity by the volume of the solution to get moles.
Note that there are TWO sodium ions in sodium carbonate, therefore the first-mole calculation must be multiplied by two.
Since molarity is defined as moles of ions/liters of solution, the final molarity will be the sum of the calculated moles divided by the sum of the liters of solution.
Hope this helps :)
The complete combustion of acetic acid, HC2H3O2(I) to form water, H2O(I), and CO2(g), at constant pressure releases 871.7 kJ of heat per mol of acetic acid.
Write a balanced thermochemical equation if 5.0g of acetic acid will be used in the reaction.
HC2H3O2(I) + O2 --- H2O(I) + CO2(g) H= -871.7 kJ
Answer:
HC2H3O2(I) + O2(g) ---> H2O(I) + CO2(g) ΔH= -72.35 kJ
Explanation:
We know that 5.0 g of acetic acid will contain, 5.0g/60 g/mol = 0.083 moles of acetic acid
Now from the reaction equation;
1 mole of acetic acid evolved -871.7 KJ of heat
0.083 moles of acetic acid will evolve 0.083 * -871.7 = -72.35 KJ
For 5.0 g of acetic acid, we can write;
HC2H3O2(I) + O2(g) ---> H2O(I) + CO2(g) ΔH= -72.35 kJ
The forces that hold molecules of metals together are stronger than the forces that hold molecules of non -metals together. This means that metals have
Answer:
Stronger bond as compared to non metals
Explanation:
what is the molar mass of p4010? solve
Answer:
283.889044 g/mol
The molar mass of P4 O10 is 283.889044 g/mol. Adding the molar mass of each element gives us the molar mass of the compound.
Explanation:
Calculate the theoretical yield for your reaction. {This is your predicted mass of CuO produced based on the starting mass of CuCO3Cu(OH)2}
Identify the Experimental Yield of your reaction (the amount that actually got produced and measured)
Calculate the percent yield of your reaction (refer to the introduction)
Evaluate your percent yield – state at least one legitimate reason your yield could be higher or lower than 100%. Be specific (the experimental error is not specific enough, for example)
Answer:
CuCO3Cu(OH)2 overlapping yield calculate itCuCO3Cu(OH)2 overlapping yield calculate it
holy sheesh dude
Explanation:
CuCO3Cu(OH)2 overlapping yield calculate it
Define the terms heredity and inherited in your own words.
Answer:
Heredity is when you have gotten either physical or mental traits from your parents.
Inherited in Biology: Getting traits from your parents
Inherited outside Biology: is the practice of passing on private property, titles, debts, privileges, rights, and obligations upon the death of an individual.
Explanation:
What is the formula for displacement? *
1- Final position minus initial position
2- Relation to a reference point plus distance travelled
3- Distance divided by time
4- Speed times vector
Answer:
2 i think i am not very good at this lol
Explanation:
The units that acceleration use are distance/time^2 (in metric units).
The acceleration is the change of velocity over time, so
In another way, if the velocity is constant, the acceleration is zero, but if the velocity change over the time (as a car do when the red light change), the acceleration takes value!.
what is the name and classification of a six sided molecule with oh attached