Many human activities result in carbon dioxide emissions.
Our carbon footprint is a measure of how much carbon dioxide we each cause to be produced.
(a) Why should we be concerned about our carbon footprint?
(b) Most power stations in the UK burn coal.
Coal was formed from tree-like plants over millions of years.
Suggest why burning wood instead of coal would help to reduce our carbon footprint.
Answer:
: the average human-driven CO2 emissions per year climbed 1.4%
every household makes about 7 tons worth of Co2
A C02 footprints are produced at such high rates and hurts plants and the environment
B coal is a very inexpensive and efficient way to generate electricity. Since its a large quantity of them which still produces alot co2 unlike wood, burning wood doesn't produce as much but it's much harder to ignite and get to last because it takes coal almost 100 degrees and wood takes about 700 degrees
Which best describes what is represented by images 1 and 2?
Image 1 shows a polymer, and Image 2 shows a monomer.
Image 1 shows a monomer, and Image 2 shows a polymer.
Image 1 shows a macromolecule, and Image 2 shows a synthetic polymer.
Image 1 shows a synthetic polymer, and Image 2 shows a macromolecule.
Answer:
b
Explanation:
im doing a test about it
Answer:
b
Explanation:
Need a little help with science please
Answer:
I'm pretty sure its liver and pancreas
Explanation:
the pancreas delivers the digestive juice to the small intestine through small tubes, your liver makes the digestive juices called the bile that helps digest fats and some vitamins
Answer:
the answer is liver and pancreas
What percent of I-125 has decayed if there are 37.5g of the original sample left?
Answer:
[(x-37.5)/x]*100%
62.5% (assuming the original sample weighs 100.0g)
Explanation:
Let's say that the original sample is x
Mass of I-125 which has decayed: x-37.5
Percentage of decayed mass: [(x-37.5)/x]*100%
Please recheck, for this may not be the correct answer
A solution with a molarity of 0.1850 contains 19.30 grams of BaCl2. What is the volume of the solution
Answer:
Volume in L = 0.50 L
Explanation:
Given data:
Molarity of solution = 0.1850 M
Mass of BaCl₂ = 19.30 g
Volume of solution = ?
Solution:
First of all we will calculate the number of moles of solute:
Number of moles = mass/molar mass
Molar mass of BaCl₂ = 208.23 g/mol
Number of moles = 19.30 g / 208.23 g/mol
Number of moles = 0.093 mol
Volume of solution:
Molarity = number of moles of solute / volume of solution in L
0.1850 M = 0.093 mol / Volume in L
Volume in L = 0.093 mol / 0.1850 M (M= mol/L)
Volume in L = 0.50 L
i dont know the answer pls help me
Answer:
Unicellular
Explanation:
Unicellular organisms are made up of only a single cell
A potted plant is placed under a grow lamp, which provides 4,200 J of energy to the plant and the soil over the course of an hour. The specific heat capacity of the soil is about 0.84 J/g° C and there are about 2,400 g of soil. How much does the temperature of the soil increase?
Answer:
Temperature increase = ΔT = 2.08 °C
Explanation:
Given data:
Energy absorbed by plant = 4200 J
Specific heat capacity of soil = 0.84 J/g°C
Mass of soil = 2400 g
How much temperature increase = ?
Solution:
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
by putting values,
4200 J = 2400 g ×0.84 J/g°C × ΔT
4200 J = 2016 J/°C × ΔT
ΔT = 4200 J / 2016 J/°C
ΔT = 2.08 °C
Why the microscope is made an inclination joint?
Answer:
inclination joint This is the joint between the pillar and the arm of the microscope. It is used to tilt the body tube and stage. It is usually best to keep the stage horizontal.
Explanation:
Can somebody help me please
Answer:
0.1139952 is the answer
Explanation:
Only the ______ has successfully landed men on the moon.
Answer: The United States
The United States is the only country to have successfully conducted crewed missions to the Moon, with the last departing the lunar surface in December 1972.
Explanation:
Answer
Only the United States has successfully landed men on the moon.
Explanation:
The United States is the only country to have successfully conducted crewed missions to the Moon, with the last departing the lunar surface in December 1972.
can someone help me (╥︣﹏᷅╥)
Water stored in snow and ice can return directly to the atmosphere through the process of sublimation.
((its timed pLEasE
Please select the best answer from the choices provided
T
F
jupiter is much more larger than earth , would gravity be weaker or stronger here?
Answer:
stronger
Explanation:
there is more gravity on Jupiter since it is bigger than earth
20 milliliters of water are poured into a graduated cylinder. A sample of metal is added. The water rises to the 32-milliliter line. What is the volume of the piece of metal?
Answer:
12
Explanation:
32-20= 12
This is because when the metal is added it adds to the volume of the liquid hence to find the metal itself subtract the final volume from Intel volume
[tex]\tt \underline{Answer:}[/tex]
12
[tex]\tt \underline{Explanation:}[/tex]
The water increases/rises to the 32 milliliter line, and before it was 20 milliliters of water in a graduated cylinder. So...to identify/find the volume, you can basically subtract.
32 - 20 = 12.
~Hope this helps! :)
BrainlyAnime ♪
What do all volcanos emit?
Answer:
By far the most abundant volcanic gas is water vapor, which is harmless. However, significant amounts of carbon dioxide, sulfur dioxide, hydrogen sulfide and hydrogen halides can also be emitted from volcanoes.
List 3 different sugars found in this product. *
3 points
INGREDIENTS / INGRÉDIENTS :
CORN MEAL, SUGAR, CORN BRAN, CORN SYRUP,
MALTODEXTRIN, FANCY MOLASSES, SALT, WHOLE OAT FLOUR.
BAKING SODA, NATURAL FLAVOUR, COLOUR (CAROTENE),
VITAMINS AND MINERALS: IRON, ZINC OXIDE, NIACINAMIDE,
d-CALCIUM PANTOTHENATE, THIAMINE HYDROCHLORIDE,
CHOLECALCIFEROL (VITAMIN D3), PYRIDOXINE
HYDROCHLORIDE, FOLIC ACID.
CONTAINS OAT INGREDIENTS. MAY CONTAIN SOY.
SEMOULE DE MAÏS, SUCRE, SON DE MAÏS, SIROP DE MAÏS,
MALTODEXTRINE, MÉLASSE QUALITÉ FANTAISIE, SEL, FARINE
D'AVOINE ENTIÈRE, BICARBONATE DE SODIUM, ARÔME
NATUREL, COLORANT (CAROTENE),
VITAMINES ET MINÉRAUX : FER, OXYDE DE ZINC,
NIACINAMIDE, d-PANTOTHÉNATE DE CALCIUM,
CHLORHYDRATE DE THIAMINE, CHOLÉCALCIFÉROL (VITAMINE
D3), CHLORHYDRATE DE PYRIDOXINE, ACIDE FOLIQUE,
CONTIENT DES INGRÉDIENTS DE L'AVOINE. PEUT CONTENIR DU SOYA.
Answer:
Sugar (Sucrose), Corn Syrup (Glucose), Molasses (C6H12NNaO3S)
Explanation:
Each of these is a sweetener.
how do you classify the society on the basis of economy write one characteristic of any two of them
Answer:
Explanation:
(1) The primary industry is mainly agriculture, which includes agricultural, forestry, animal husbandry and fishery components. Agriculture is the foundation of social economy. (2) The secondary industry, which mainly includes the industrial and construction industries.
How are clouds formed? Simple answer please!
Answer:
Clouds form when the invisible water vapor in the air condenses into visible water droplets or ice crystals. For this to happen, the parcel of air must be saturated, i.e. unable to hold all the water it contains in vapor form, so it starts to condense into a liquid or solid form.
Explanation:
MARK ME BRAINLIEST!!!!!!!! THANKS BESTFRIENNNNNDDDDD!!!!!!!!
Answer:
Clouds form when the invisible water vapor in the air condenses into visible water droplets or ice crystals. For this to happen, the parcel of air must be saturated, i.e. unable to hold all the water it contains in vapor form, so it starts to condense into a liquid or solid form.
Explanation:
I HOPE THIS HELPS*--- *meow*
What is the density in units of g/mL of a substance with a mass of 20.0 g and a volume of 4. 0 mL?
Answer:
5 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question we have
[tex]density = \frac{20}{4} = 5 \\ [/tex]
We have the final answer as
5 g/mLHope this helps you
A vector is a quantity with magnitude and ____
Answer:
direction
Explanation:
A P E X
What is a lone pair?
A. Two pairs of electrons that form a double bond
B. Two atoms that have been pushed close to each other
C. A pair of electrons that is not used in bonding
D. A diatomic molecule attracted to no other molecule
Answer:
I BELIEVE IT is c.
Explanation:
In the compound Al2O3, aluminum has an oxidation number of 3, while oxygen's oxidation number is ________.
Answer:
The oxidation number of Oxygen is -2.
Answer:
-2
Explanation:
I just had that question!
ScF2 +
KBr ---->
KE +
ScBr2
Balanced equation :
ScF₂ + 2KBr ⇒ 2KF + ScBr₂
Further explanationGiven
Reaction
ScF₂ + KBr ⇒ KF + ScBr₂
Required
Balanced equation
Solution
1. Give coefficient
ScF₂ + aKBr ⇒ bKF + cScBr₂
Sc, left=1, right=c⇒c=1
F, left=2, right=b⇒b=2
K, left=a, right=b⇒a=b⇒a=2
The equation becomes :
ScF₂ + 2KBr ⇒ 2KF + ScBr₂
Give an example of a chemical reaction during which a single substance breaks
down. *
Answer:
2NaCl(l) => 2Na(s) + Cl₂(g)
Explanation:
Electrolysis of melt NaCl to form sodium (Na) metal and chlorine (Cl₂) gas.
This is a class of reaction called 'Decomposition Rxns'. For what it's worth, there are 6 distinct compound types that undergo breakdown by decomposition. The acronym C O A C H E can help remember them.
C - Carbonates => CaCO₃(s) => CaO + CO₂
O - Oxides of Metals => 2Fe₂O₃(s) => 4Fe°(s) + 3O₂(g)
A - Acids (Oxoacids) => H₂CO₃(aq) => CO₂(g) + H₂O(l)
C - Chlorates, Bromates & Iodates => 2KClO₃(s) => 2KCl(s) + 3O₂(g)
H - Hydroxides => Ca(OH)₂(s) => CaO(s) + H₂O(l)
E - Electrolysis => see above electrolysis of NaCl(l)
Answer:
2NaCl(l) => 2Na(s) + Cl₂(g)
Explanation:
What energy transform occurs when the hot plate is plugged into the outlet and the control knob is on position?
Thermal to mechanical
Thermal to electrical
Electrical to thermal
Mechanical to thermal
Answer:
Its electrical to thermal energy
Explanation:
Please help me this is my science final
Answer:
1.Winter
2.Autmn
3.Summer
4.Spring
I hope this helps!
How many carbon atoms are represented by the model below?
Answer:
3
Explanation:
SOMEONE HELP PLS ILL GIVE BRAINLIEST AND 19 PT
Sample left = 6.25 g
The percentage = 6.25%
Further explanationGiven
t1/2 = half-life = 3.8 days
t = decay time = 15.2 days
No = initial sample = 100 g
Required
Nt = final sample left
The percentage
Solution
General formulas used in decay:
[tex]\large{\boxed{\bold{N_t=N_0(\dfrac{1}{2})^{t/t\frac{1}{2} }}}[/tex]
Input the value :
[tex]\tt N_t=100.\dfrac{1}{2}^{15.2/3.8}\\\\N_t=100.\dfrac{1}{2}^4\\\\N_t=6.25~g[/tex]
The percentage : Nt/No
6.25 : 100 = 6.25%
A sample of pure radioactive isotope is left to decay. After 40.0 days, the 1 point
sample is placed in a mass spectrometer, and it is determined that only
25% of the original isotope remains. How long is the half-life?
Answer:
6 months and 1 day
Explanation:
This biome has extremely cold winters and short, mild summers. It has no trees, only low-growing plants with short root systems because of its frozen soil
called the permafrost. It is covered by snow for most of the year. Animals that live here must have wide paws or hooves to walk through the frozen mushy.
soil. This biome is known as the_________
A. Tropical rainforest
B. Taiga
C. Deciduous Forest
D. Desert
E. Grassland
F. Tundra
Mg(s) + HCl(aq) −→ MgCl2(aq) + H2(g).
What mass of HCl is consumed by the reaction of 2.28 mol of magnesium?
Answer in units of g
166 g HCl
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
BracketsParenthesisExponentsMultiplicationDivisionAdditionSubtractionLeft to RightChemistry
Stoichiometry
Reading a Periodic TableBalancing EquationsUsing Dimensional AnalysisExplanation:Step 1: Define
[RxN - Unbalanced] Mg (s) + HCl (aq) → MgCl₂ (aq) + H₂ (g)
[RxN - Balanced] Mg (s) + 2HCl (aq) → MgCl₂ (aq) + H₂ (g)
[Given] 2.28 mol Mg (s)
Step 2: Identify Conversions
[RxN] 1 mol Mg = 2 mol HCl
Molar Mass of H - 1.01 g/mol
Molar Mass of Cl - 35.45 g/mol
Molar Mass of HCl - 1.01 + 35.45 = 36.46 g/mol
Step 3: Stoichiometry
Set up: [tex]\displaystyle 2.28 \ mol \ Mg(\frac{2 \ mol \ HCl}{1 \ mol \ Mg})(\frac{36.46 \ g \ HCl}{1 \ mol \ HCl})[/tex]Multiply: [tex]\displaystyle 166.258 \ g \ HCl[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
166.258 g HCl ≈ 166 g HCl