Answer: So to figure out your energy balance you need to gather some important information. That is, you eat more calories than your body uses. A kilojoule is a calorie) is a measure of energy in food. On average, people eat and drink around 8700 kilojoules a day.
Explanation: I hope that helped- Please mark me as brainliest!
What is 2+2 plzzzzz help I’m only 83
Answer: 4
Explanation: if you move to spaces in a number line from 2 you would be at 4
Which of the following elements is used by your body? A) aluminum B) helium C) calcium D) all of the above
3. A sample of neon gas has a volume of 1.2 L at 28.5°C. What will the volume be at 125°C it the
pressure remains constant?
Answer:
1.58L
Explanation:
Given parameters:
Initial volume = 1.2L
Initial temperature = 28.5°C = 28.5 + 273 = 301.5K
Final temperature = 125°C = 125 + 273 = 398K
Unknown:
New volume = ?
Solution:
Volume and temperature relationship is resolved using the Charles's law.
The law states that "the volume of a fixed mass of a gas varies directly as its absolute temperature if the the pressure is constant".
So;
[tex]\frac{V1}{T1}[/tex] = [tex]\frac{V2}{T2}[/tex]
V1 is the initial volume
T1 is the initial temperature
V2 is the new volume
T2 is the new temperature
[tex]\frac{1.2}{301.5}[/tex] = [tex]\frac{V2}{398}[/tex]
301.5V2 = 477.6
V2 = 1.58L
7. A sound wave travels 500m in 60 seconds. Calculate the speed of the sound?
Answer:
8.33m/s
Explanation:
Given parameters:
Distance traveled = 500m
Time taken = 60s
Unknown:
Speed of the sound = ?
Solution:
The speed the sound can be derived using the expression below:
Speed = [tex]\frac{distance}{time}[/tex]
So;
Speed = [tex]\frac{500}{60}[/tex] = 8.33m/s
Summarize the arguments both for and against allowing genetically altered meats into the United States.
Can u please help!?
:⊃
Answer:Through "gene escape" they can pass on to other members of the same species and perhaps other species. Genes introduced in GMOs are no exception, and interactions might occur at gene, cell, plant and ecosystem level. Problems could result if, for example, herbicide-resistance genes got into weeds. So far, research on this is inconclusive, with scientists divided - often bitterly. But there is scientific consensus that once widely released, recalling transgenes or foreign DNA sequences, whose safety is still subject to scientific debate, will not be feasible.
Explanation: i don't really know, don't come at me please
when an ecosystem changes the results are (positive negative both or none) explain
This is science!
Answer:
C. Both
Explanation:
When an Ecosystem changes the effects can be both positive and negative. It all really just depends on what the change is.
(C) A metal 'M' has electronic configuration 2, 8, 2. Find the formula of its
12]
a. Hydroxide
b. Phosphate
M = 2 . 8 . 2
Valence Electron of M = 2
M ==> M⁺² + 2 e⁻
a. M⁺² + OH⁻ ==> M(OH)₂
b. M⁺² + PO₄⁻³ ==> M₃(PO₄)₂
true or false:
1. chemical bonds have only one form.
2. All compounds are neutral.
3. covalent bonds do not exhibit any sort of preferential charge between atoms.
4. a covalent bond can only involve one shared electron.
Can someone help me please but on those two questions
Answer:
In first mcq correct option is "solid" while in 2nd correct is "gas"
Explanation:
During a chemical reaction, the______
is not fully consumed.
A)
ideal chemical
B)
excess reactant
C)
limiting reagent
D)
stoichiometric compound
Answer:
limiting reagent :)
Explanation:
Answer:
B) excess reactant
Explanation:
During a chemical reaction, the excess reactant is not fully consumed.
You put two pots of water on the stove to boil. Both pots are the same size and are on the same size burner at the same heat setting, and one pot has twice as much
water as the other. Which one will boil faster? Why do you think that is?
Answer:
The emptiest one.
Explanation:
The more water, the more heat molucules have to turn to boil.
Have a great day!
Hope I helped and it would be greatly appreciated if you could be considerate and give brainliest.
If you could repeat the lab and make it better, what would you do differently and why?
There are always ways that labs can be improved. Now that you are a veteran of this lab and have experience with the procedure, offer some advice to the next scientist about what you suggest and why. Your answer should be at least two to three sentences in length.
Hello, 3Coli Here!
Your Answer is Here:
I would recheck, redo, and revise my answers, if necessary. Also, I can look at the lesson again, if I forgot something. So that's what I would do.
Hopefully, this helps!
Ask your question below!
Answer:
I will just revise and check my answer, or I can redo the lesson.
Explanation:
Have a good day! :D
Balance the following equations:C(s) +CO2(g)- CO(g)
Answer:
C(s)+CO₂(g)→2CO(g)
Explanation:
Basically you’re adding the compounds until they’re equal on both sides
HURRRYYY
in a chemical reaction you will always have an excess reactant. true or false?
Answer:
It's False
Explanation:
In a chemical reaction, reactants that are not used up when the reaction is finished are called excess reagents. The reagent that is completely used up or reacted is called the limiting reagent, because its quantity limits the amount of products formed.
Hope this helps you
Answer: false
Explanation:
A student investigated the reaction of magnesium with oxygen.
The student calculated that 4.8 g of magnesium would make 8.0 g of magnesium oxide.
The equation for the reaction is:
2Mg + O2 → 2MgO
What mass of oxygen is required to produce 8.0 g of magnesium oxide from 4.8 g of magnesium?
Based on The Law of Conservation of Mass Lavoisier, the mass of oxygen required is 3,2 g
The two main postulates that was given by Antoine Lavoisier are, oxygen play an important role in combustion and the other is mass of the reactant and product is conserved. Therefore the mass of oxygen is 3.2 g.
What is law of conservation of mass?According to Law of conservation of mass, mass can neither be created nor be destroyed. Mass can only be transformed from one form to another. The law of conservation of mass was given by Antoine Lavoisier.
Every reaction in nature follow the law given by Antoine Lavoisier that is mass is always conserved. Another postulated that was given by Antoine Lavoisier is the role of oxygen in combustion reaction. Combustion can not happen without presence of oxygen. According to Law of Conservation of Mass Lavoisier, the mass of oxygen required is 3.2 g.
Therefore the mass of oxygen is 3.2 g.
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As stars get older, before they collapse, they throw off dust, heavy atoms and other materials an form a new
A. Constellation
B. Star
C. Rain cloud
D. Nebula
Answer:
B or D
Explanation:
.....I'm pretty sure I earned on some kids tv show
Plz answer as soon as possible :)
Answer:
5.99
Explanation:
hope this helps you
what is ore of iron
Iron ore are rock rocks
hope this helps
please mark as brainlist
Balanced equation for
GaF3 +
Cs →
CSF +
Ga
How many mols are in 6.73 x 1024 particles of Cu? A. 6.02 x 1023 mols of Cu B. 11.18 mols of Cu C. 1.12 mols of Cu D. 10 mols of Cu\
Answer:
B. 11.18 mols of Cu
Explanation:
Given parameters:
Number of particles in Cu = 6.73 x 10²⁴ particles
Unknown:
Number of moles = ?
Solution:
A mole of a substance is known to contain the Avogadro's number of particles. To solve this problem;
6.02 x 10²³ particles is contained in 1 mole of a substance
6.73 x 10²⁴ particles will be contained in [tex]\frac{6.73 x 10^{24} }{6.02 x 10^{23} }[/tex] = 11.18moles of Cu
Explanation:
Purpose and Theory: A tablet of vitamin C contains the active ingredient called ascorbic acid (HC,H,0.).
Ascorbic acid is an organic acid which is a white power and is soluble in water.
In the following microtitration lab you will be grinding up a vitamin C tablet
, and using a 0.10 g sample of the
vitamin C powder, which will be dissolved in 20-40 mL of water. This solution will be used to determine the
quantity of ascorbic acid in a commercial vitamin C tablet.
Groups
Lab 2
# of Drops 1 or Drops 2 of Drops 3
96
91
94
Hadia
Data & Analysis:
Complete the missing information in the following data table [24]
1
2
3
Trial
Volume of NaOH (drops)
0 05mL drop
(NaOH (O 0050mol/L)
Volume of NaOH (ML)
Average Volume of NaOH (ml)
T I
O 0050
00050
00050
The balanced chemical reaction between ascorbic acid and sodium hydroxide is:
HC,H,O + NaOH NaC,H,Oye H,O,
1. Stoichiometrically calculate the mass (in grams) of ascorbic acid in the powdered sample.
!!!!!PLZZZZ HELP!!!!! I'LL GIVE YOU 5 STARS AND A LIKE AND I'LL GIVE YOU POINTS JUST HELP ME ANSWER
Moles|Grams|Liters
1.2 mol N2=__ L
3 mol H2=__ L
0.5 mol CO2=__ L
10.3 L NO2=__ moles
67.2 L SO2=__ moles
89.6 L NO=__ moles
44.8 L NO2=__ grams
201.6 L H2=__ grams
65 grams CO=__ L
152 grams F2=__ L
Answer:
1.2 mol N2 = 26.88 L
3 mol H2 = 67.2 L
0.5 mol CO2 = 11.2 L
10.3 L NO2 = 0.46 moles
67.2 L SO2 = 67.2 / 22.4 = 3 moles
89.6 L NO = 89.6 /22.4 = 4 moles
44.8 L NO2 = 92 grams
201.6 L H2 = 18 g
65 grams CO = 51.9 L
152 grams F2 = 89.6 L
Explanation:
1 mole of a gas occupies a volume of 22.4 L
(N = 14, O = 16, C = 12, H = 1, F = 19)
1.2 mol N2= 1.2 * 22.4 L = 26.88 L
3 mol H2 = 3 * 22.4 L = 67.2 L
0.5 mol CO2 = 0.5 * 22.4 L = 11.2 L
10.3 L NO2 = 10.3 / 22.4 L = 0.46 moles
67.2 L SO2 = 67.2 / 22.4 = 3 moles
89.6 L NO = 89.6 /22.4 = 4 moles
1 mole or 22.4 L of NO₂ has a mass of 46 g
44.8 L NO2 = (44.8 /22.4) * 46 grams = 92 grams
1 mole or 22.4 L of H₂ has a mass of 2 g
201.6 L H2 = (201.6 / 22.4) * 2 grams = 18 g
1 mole or 22.4 L of CO has a mass of 28 g
65 grams CO = 65/28 * 22.4 L = 51.9 L
1 mole of F₂ has a mass of 38 grams
152 grams F2 = 152/38 * 22.4 L = 89.6 L
A rocket travels 4500 meters in 150 seconds. What is its average speed?
Answer:
Your average speed was 3.77 Miles per hour
Explanation:
Which among the following will make lime water look milky?Immersive Reader
(1 Point)
O₂
CaCO₃
Ca(OH)₂
Which among the following will make lime water look milky
option C) Ca(OH)₂
_____ is the element from which iron is taken.
Carbon
Quartz
Hematite
y’all pleasee answer these
how do i caculate the trmperature change that 725 grams of aluminum will undergo when 2.35x10^4 Joules of thermal energy are added to it?
Answer:
36°C
Explanation:
Given parameters:
Mass of aluminum = 725g
Quantity of heat = 2.35 x 10⁴J
Unknown:
Temperature change = ?
Solution:
To solve this problem, we simply use the expression below:
The quantity of energy is given as:
Q = m C Δt
Q is the quantity of energy
m is the mass
C is the specific heat capacity of aluminum = 0.9J/g°C
Δt is the change in temperature
The unknown is Δt;
Δt = [tex]\frac{Q}{mc}[/tex] = [tex]\frac{2.35 x 10^{4} }{725 x 0.9}[/tex] = 36°C
Write your explanation on how plants
nake their own food?
imnortont bynroduct of
Answer:
photosynthesis are ligt water and carbon dioxide
Explanation:
Plants make their own food out of inorganic compounds through a process called photosynthesis that takes place in the leaves. The ingredients necessary for photosynthesis are light, water and carbon dioxide.
Which of the following properties are most typical for nonmetals? Check all that apply.
Answer:
B) Poor conductors
Explanation:
According to the characteristics of non-metals , non-metals are poor conductors of electricity and are mostly gases at room temperature and are also brittle.
What are the characteristics of non-metals?
An element is the simplest form of matter.Elements are further classified as metal,non -metals and metalloids. Non-metals do not possess luster and are dull . They are not malleable and ductile and are soft due to the covalent bonding present in them . Non-metals owing to their soft nature have low melting points.
As they have large intermolecular spaces they are mostly gases at room temperature and are also brittle due to the presence of weak bonding present in them.They are poor conductors as they do not have mobile electrons.They have low tensile strength due to presence of covalent bonding.
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What characteristic of an element’s atoms always determines the element’s identity?
Answer:
Number of protons
Explanation:
There are three sub atomic particles. These are;
- Protons
- Electrons
- Neutrons
Among these three particles, only one determines the identity of the element. This is the Protons. The number of protons which is also called the atomic number determines the identity of an element. For instance, atom with one proton is Hydrogen and n other element can have atomic number of one.
0.385g of 17Cl is how many atoms?
Answer:
(Click here to get an answer to your question ✍️ 0.385g of 17Cl is how many atoms?).
Explanation: