Answer:
covalent bonds
Explanation:
covalent bonds hold together the hydrogen and oxygen atoms of individual H2O molecules. Covalent bonds occur when two atoms share electrons with each other.
Charles's Law: This law essentially states that gas volume has a direct relationship to temperature. If a football is inflated indoors during winter and then taken outside, what volume will be occupied inside the football if indoors the football is inflated at 26°c taking up 100 cm3, and it is 13°c outside?
Answer:
V2 = 95.65 cm^3 or 96 cm^3 (depends on if you want to round up or not)
Explanation:
Charles law is V1 / T1 = V2 / T2 (1 means initial and 2 means final condition)
For Charles law, you must use kelvin scale for temperature. So to convert from C to K, you add 273.15
T1 = 26 +273.15 = 299.15 K
T2 = 13 + 273.15 = 286.15 K
Now plug in the values,
100 / 299.15 = V2/286.15
V2 = 95.65 cm^3 or ~ 96 cm^3
The answer should make sense because if they have a direct relation, if one goes down then the other goes down. For final condition, we lowered the temperature so our volume should have decreased too and it did (we went from 100 to 96 cm^3)
Calculate the molar mass of Ca3(PO4)2
934.32 g Ca3(PO4)2 =______
moles Ca3(PO4)2
Answer:
Molar mass of Ca₃(PO₄)₂ = 310.18 g/mol934.32 g Ca₃(PO₄)₂ = 3.01 moles Ca₃(PO₄)₂Explanation:
The molar mass (MM) of Ca₃(PO₄)₂ can be calculated as follows:
MM of Ca₃(PO₄)₂ = (MM of Ca)*3 + [(MM of P) +(MM of O)*4]*2MM of Ca₃(PO₄)₂ = 310.18 g/molNow we can convert 934.32 g of Ca₃(PO₄)₂ into moles:
934.32 g ÷ 310.18 g/mol = 3.01 molesA nurse practitioner prepares 470. mL of an IV of normal saline solution to be delivered at a rate of 85 mL/h. What is the infusion time, in hours, to deliver 470. mL?
Answer: Infusion time is 5.5 h
Explanation: Time is 470 ml / 85 ml/h = 5.5 h
Which substance has Delta.Hf defined as 0 kJ/mol?
A. H2O (s)
B. Ne (l)
C. F2 (g)
D. CO2 (g)
Answer:
its actually c
Explanation:
2. In the electrolysis of water
(a) Name the gases liberated at anode and cathode.
(b) Why is it that the volume of gas collected on one electrode is two times that on the other
electrode?
(c) What would happen if dil.H,SO, is not added to water?
Answer:
In the electrolysis of water the gases collected in anode is oxygen and in cathode is hydrogen.
It is because water contains two molecules as compared to one molecules of oxygen.
If Dil.H,So, is not added in water then water doesn't conduct electricity.
Please make me brainiest answer
How many total ions are there in 5.00 moles of cobalt (II) bromide?
Considering the side chain of each of the amino acids at pH 7.4, is that amino acid classified at neutral, basic, or acidic? You are currently in a sorting module. Turn off browse mode or quick nav, Tab to items, Space or Enter to pick up, Tab to move, Space or Enter to drop. Neutral Basic Acidic
Answer:
Considering the side chain of each of the amino acids at pH 7.4, is that amino acid classified at neutral, basic, or acidic? You are currently in a sorting module. Turn off browse mode or quick nav, Tab to items, Space or Enter to pick up, Tab to move, Space or Enter to drop. Neutral Basic Acidic
The answer is in the the images. I have placed all the structures in the specific boxes. I hope this helps.
When fluorine (F) forms chemical compounds with metals, the fluorine atom gains electrons , looses electrons
7. What is the pH of [OH-] = 1.0 * 10-5 solution?
О
1
5
14
9
Answer:
I'd 9 Coz is better than anything else I help so u need to other people that question don't be jealous of them
What chemical is used to represent compounds
Answer:
Compounds are represented by chemical formulas. Elements in a compound are represented by chemical symbols, and the ratio of different elements is represented by subscripts.
PPLLLLLZZZZZ HELPPPPPPPPP ME WITH THIS QUESTION BRAINLIEST ANY ANSWERS WOULD BE GREATLY APPRECIATED :) chemical reaction will stop when the limiting reactant is used up.
Question 1 options:
True
False
Consider the role of third world countries in this system. How would they benefit or not benefit from a cap and trade system?
Answer:
they would benefit
Explanation:
they would benefit because we can move more machines that reduce pollution in those countries.
What is the lowest whole number ratio between the aluminum ion and carbonate ion in the compound, aluminum carbonate?
A. 2 :1
B. 1: 1
C. 3 : 2
D. 1 : 2
E. 2 : 3
Answer:
E. 2 : 3
Explanation:
Aluminium carbonate is a neutral compound made by aluminium ion, Al³⁺ and carbonate ion, CO₃²⁻. As is neutral, the formula must be:
Al₂(CO₃)₃.
2 Al₃⁺ = 6 positives charges
3 CO₃²⁻ = 6 negative charges
Thus, the simplest whole number ratio between Al³⁺ and CO₃²⁻ must be:
2:3
And right answer is:
E. 2 : 3identify two conjugate base for each compound HCN and HBr
The conjugate base of HCN is CN^-
The conjugate base of HBr is Br^-
Please hurry! And help!!
Best answer gets marked Brainliest!
NO LINKS or question will be REPORTED!
When two nitrogen atoms combine, they form a
A) Compound
B) Liquid
C) mixture
D) Molecule
Answer:
I guess the answer is compound
Explanation:
Coz compound it is on there playing with me again Go ahead and paste it in the class
A beaker of 450g of water is heated from 4.0°C to 25.0°C on a hot plate. If the
specific heat of H2O is 4.18J/9°C how much energy has the water absorbed?
A 39,501 J
B 4.42 x 104
C 5.13 J
D 54,549 J
Answer: 5.13
Explanation: juss do it
Taking into account the definition of calorimetry, the water has absorbed 39,501 J.
CalorimetryCalorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.
Sensible heat is defined as the amount of heat that a body absorbs or releases without any changes in its physical state (phase change).
So, the equation that allows to calculate heat exchanges is:
Q = c× m× ΔT
where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.
Energy that the water absorbedIn this case, you know:
Q= ?c= 4.18 [tex]\frac{J}{gC}[/tex]m= 450 g ΔT= Tfinal - Tinitial= 25 C - 4 C= 21 CReplacing in the definition of calorimetry:
Q = 4.18 [tex]\frac{J}{gC}[/tex]× 450 g× 21 C
Solving:
Q= 39,501 J
Finally, the water has absorbed 39,501 J.
Learn more about calorimetry:
brainly.com/question/11586486
brainly.com/question/24724338
#SPJ2
For the reaction 2Na + Cl2 2NaCl, calculate the percent yield if
155.0 g of chlorine (Cl2) should be produced and your experiment
produced 143 g (C12).
Answer:
[tex]Y=92.25\%[/tex]
Explanation:
Hello there!
In this case, according to the given chemical reaction, it is possible for us to calculate the percent yield by dividing the actual yield of 143 grams of gaseous chlorine by the theoretical yield of 155 g of this gas. In such a way, we proceed as follows:
[tex]Y=\frac{143g}{155g} *100\%[/tex]
Which has a result of:
[tex]Y=92.25\%[/tex]
Regards!
If 50 mL of pure acetone is mixed with 450 mL of water, what is the percent by volume of acetone?
Answer:
10%
Explanation:
The percent by volume of acetone is given by the following formula:
% v/v = Volume of acetone / Total Volume * 100%
Now we calculate the total volume of the solution:
Total Volume = Volume of Acetone + Volume of Water
Total Volume = 50 mL + 450 mL = 500 mL
Then we calculate the percent by volume:
% v/v = 50 mL / 500 mL * 100 % = 10%
"When your heart was an open book" is an example of of
A. simile
B. metaphor
C. alliteration
D. all of the above
B. metaphor
The answer is metaphor, because it can't possibly be other thing.
what dose bioverisidy refer to
Answer:
The term biodiversity (from “biological diversity”) refers to the variety of life on Earth at all its levels, from genes to ecosystems, and can encompass the evolutionary, ecological, and cultural processes that sustain life.
or if you want a short answer:
The term “biodiversity” refers to the variety of living organisms.
Answer:
the term bioverisidy refer to the veriety of life on earth at all its levels from genes to ecosystem and ecompass the evolutionary ecological and cultural prosesses that sustain life
A “happy” atom is one that has a _________ valence orbital. octet rule
Answer:
Hello There!!
Explanation:
I believe the answer is 8.
hope this helps,have a great day!!
~Pinky~
AgI + KNO3 what type of reaction is this
Answer:
all + kn03
Explanation:
and the reaction is single replacement
Maintaining constant pressure, the volume of a gas is increased from 12,0 L
to 32.0 L by heating it. If the original temperature was 23.0°C, what is the
new temperature? *
23. 45 K
61.33 K
789.33 K
567.87 K
Answer:
790 K
Explanation:
Step 1: Given data
Initial volume of the gas (V₁): 12.0 LInitial temperature of the gas (T₁): 23.0 °CFinal volume of the gas (V₂): 32.0 LStep 2: Convert 23.0 °C to Kelvin
We will use the following expression.
K = °C + 273.15 = 23.0 + 273.15 = 296.2 K
Step 3: Calculate the final temperature of the gas
Assuming constant pressure and ideal behavior, we can calculate the final temperature of the gas using Charles' law.
T₁/V₁ = T₂/V₂
T₂ = T₁ × V₂/V₁
T₂ = 296.2 K × 32.0 L/12.0 L = 790 K
15men work in 80days .How long will it take to finish that work if 5men were added?
Answer:
80 day= 15 men
Explanation:
1 man takes = 80*15 = 1200 days
20 men take = 1200/20= 60 days
Answer:
80 days=15 men
Explanation:
hope it helps❣️
what are factors that affecting the boiling point of liquid?
What happens in radioactive decay?
O A. An electron is lost to form a negatively charged particle.
O B. An unstable nucleus breaks down into smaller parts.
O C. Two smaller nuclei are joined to form one larger nucleus.
O D. A large nucleus breaks apart to form smaller nuclei.
SHIRME
A radioactive atom will spontaneously release radiation in the shape of energy rather than particles in order to transition into a more steady state.
Why is something radioactive?Radioactivity, as its name suggests, seems to be the act of generating radiation without any external cause. This is carried out by an unstable atomic nucleus that "wants" to abandon certain power in order to change to a more stable form.
Are people radioactive at all?Absolutely, since humans consume radioactive materials from the environment through food, drink, and air, our bodies are inherently radioactive. Our bodies take these substances in and store them in our bones, tissues, and organs. We also breathe them in and consume them.
To know more about radioactive visit:
https://brainly.com/question/1770619
#SPJ1
how can miscible liquids that different boiling points be separated
Answer:
By boiling and further condensing the liquid with the lowest boiling point.
Explanation:
Hello there!
In this case, according to the attached diagram, it turns out possible for us to infer that the mechanism whereby miscible liquids with different boiling points are separated is distillation, because the flask is heated until the boiling point of the liquid with the lowest value, in order to boil it and subsequently condense it, whereas the liquid with the highest boiling point remains in the flask; and therefore, the two liquids are separated.
Regards!
Select ALL of the abiotic factors
lesson 5.01
Question 1 options:
air
light
fungi
soil
salinity
Answer:
I think it should be
salinity and
light
Titan, the largest moon of Saturn, has an atmosphere that is about 94% nitrogen (N2) and 6% methane (CH4). The molecular mass of nitrogen is 4.651e-26kg and the molecular mass of methane is 2.663e-26kg. The acceleration due to gravity at the surface is about 1.35 m/s^2. For this problem, assume that Titan's atmosphere is in thermal equilibrium at 100 K. What fraction of the atmosphere is methane at altitude 2 km
Answer:
9.493 e-01
Explanation:
Given that Titan's temperature at thermal equilibrium = 100 K
Determine the fraction of the atmosphere that is methane
at an altitude of 2 km
applying Ideal gas law
P = Po e^ -Z/k ---- ( 1 )
In this question Z = M₀ g z ( replace -Z in equation 1 with M₀gz )
P = Po e^- M₀gz / RT ------ ( 2 )
where : Mo = 16 * 10^ -3 kg/mol , g = 1.35 m/s^2 , z = 2 * 10^3 m , R = 8.3 J/mol.k , T = 100 k
insert values Back to equation 2
P = Po e^-0.052
P = 0.9493 Po
hence the fraction of the atmosphere that is methane
= P / Po = 9.493 * 10^-1
= 9.493 e-01
Once the concentration of the common ion is increased______.
a. the solubility of the ionic solid increases.
b. the solubility of the ionic solid decreases.
c. the solubility of the common ion increases.
d. the solubility of the common ion decreases.
Answer:
B
Explanation: