water, soil, temperature, space
Answer:
wdym??
Explanation:
Answer:
wdym by water, soil, temperature, space?
Explain the role of a primary consumer and a secondary consumer in a food web.
Answer:
Explanation:
Secondary consumers are organisms that eat primary consumers for energy. Primary consumers are always herbivores, or organisms that only eat autotrophic plants.
Carnivores only eat other animals, and omnivores eat both plant and animal matter.
What is the pH of a solution that has a [OH^-] of 1x10^-2?
2
12
9
8
how many teaspoons of jelly would be required to use 36 slices of bread?
Answer:
depends on how much jelly u like
1
Which of the following is a mixture?
A air
B copper
C oxygen
D steam
Answer:
A air
Explanation:
Air is a mixture but not compound. Its constituents can be separated. For example: oxygen, nitrogen etc. by physical process.
8. What is the chemical equation when calcium chloride combines with water?
Answer:
CaCI2 + H2O = Ca(OH)2 + HCI
Which gas variable has to do with the amount of collisions of gas particles has?
(I think it’s temperature but I’m not sure)
Pressure
Temperature
Amount
Volume
Because both tin and carbon are members of Group 4A(14), they form structurally similar compounds. However, tin exhibits a greater variety of structures because it forms several ionic species. Predict the shape and ideal bond angle, including any deviations, for SnCl3−.
Answer:
See Explanation
Explanation:
Elements in group fourteen are mostly known to form compounds in which there are four electron domains leading to a tetrahedral electron domain geometry.
However, the presence of lone pairs affects the shape of the molecule. SnCl3− has four electron domains, three of them are bond pairs while one is a lone pair. The shape of the molecule is based on a tetrahedron, however the observed geometry is trigonal pyramidal due to the presence of the lone pair. Its bond angle is now less than the predicted 109 degrees.
3.00 L of a gas is collected at 35.0°C and 705.0 mmHg. What is the volume at STP?
Group of answer choices
2.55 L
1.65 L
2.47 L
3.10 L
Answer:
2.47L
Explanation:
Using the combined gas law equation as follows:
P1V1/T1= P2V2/T2
Where;
P1 = initial pressure (mmHg)
P2 = final pressure (mmHg)
V1 = initial volume (L)
V2 = final volume (L)
T1 = initial temperature (K)
T2 = final temperature (K)
According to the information provided in this question;
P1 = 705mmHg
P2 = 760mmHg (STP)
V1 = 3.00L
V2 = ?
T1 = 35°C = 35 + 273 = 308K
T2 = 273K (STP)
Using P1V1/T1= P2V2/T2
705 × 3/308 = 760 × V2/273
2115/308 = 760V2/273
Cross multiply
308 × 760V2 = 2115 × 273
234,080V2 = 577,395
V2 = 577,395 ÷ 234,080
V2 = 2.47L
A toy balloon is filled to 135 mL at a temperature of 22.5 °C (295.5 K). What temperature in Kelvin does it need to be heated to expand to 250 mL?
Answer:
T2 = 547.2K
Explanation:
Given:
V1 = 135 ml. V2 = 250 ml
T1 = 295.5K. T2 = ?
Using Charles's law and solving for T2,
V1/T1 = V2/T2
T2 = (V2/V1)T1
= (250 ml/135 ml)(295.5K)
= 547.2K (or 273.2°C)
Which chemical reaction is the fastest?
A. Oven cleaner absorbs cooked grease overnight.
B. Cake rises as it cooks in the oven.
C. Drain cleaner fizzes up as it encounters blockages in a pipe.
D. Milk turns sour.
Answer:
C) drain cleaner fizzes up as it encounters blockages in a pipe
Explanation:
The saturation point for a solution is 25.0 grams of solute per 500 grams of solvent. If you pour 50.0 grams of solute into 800. grams of solvent, how many grams of
solute are in solution?
Plz help me!!
Answer:
I think 50 grams only because you have pour 50 grams of solute in to 800 grams of solvent.
An artificial biosphere is an enclosed area that contains the elements necessary for human life to exist. Suppose scientists want to develop an artificial biosphere on a new planet. The new planet has an atmosphere that is 96% carbon dioxide with only trace amounts of oxygen. What could humans do to make enough oxygen to survive? Explain your answer.
Answer:
See Explanation
Explanation:
A biosphere is a zone of life found on earth. Since the artificial biosphere has all the elements that support and sustain human life, then there must also be soil in the artificial biosphere.
If that is the case, then we can engage in massive tree planting. Trees take in carbon dioxide and release oxygen. Hence if a large number of trees are planted all over the artificial biosphere, the trees will eventually produce large enough oxygen to support human life overtime.
Hey I know this looks easy but
Can somebody plz help tell me where to put the organisms in the correct group (only if u know which ones) thanks :3
WILL MARK BRAINLIEST WHOEVER ANSWERS FIRST :DDD!
Answer:
Benthos: crabs, starfish, lobsters, stingrays,, algae
Plankton: diatom, tubeworms
Nekton: whales, sharks, turtles,
Explanation:
I NEED NOW PLEASE HELP How many grams of KF are need in order to produce 2.0 mol CaF?
What is the change in energy of a gas at a pressure of 105 kPa, if 245 J of energy is added causing a change in volume from 25.3 L to 38.6 L?
Answer:
-1151.5 J
Explanation:
Given that:
The supplies energy = 245 L
The energy used in the expansion of gas = Pressure ×ΔV (change in volume)
At standard conditions;
Pressure = 105 × 10³ Pa
energy used in the expansion = 105 × 10³ Pa × (38.6 - 25.3)L
= 1396.5 J
Thus, the change in the energy of gas = 245 - 1396.5 J
= -1151.5 J
Hence, we can conclude that the gas has lost its own energy in the process of expansion.
What does the line with “alternating spikes and semicircles” mean?
Answer:
The line with spikes and semicircles is a stationary front, it brings days of steady rain.
Explanation:
L means Low pressure, it brings stormy weather with strong winds.
H means High pressure, it brings fair weather and light winds.
The line with spikes is a cold weather front, it brings thunderstorms and colder
temperatures.
The line with spikes and semicircles is a stationary front, it brings days of steady rain.
Please help!!!! Best answer will get brainliest
Answer:
covalent network
Explanation:
trust me on this one
31. A mixture with sand, pink sugar and water would be best separated using
Answer:
Filtration and evaporation
Explanation:
A mixture of sand, pink sugar and water can be separated by filtration and evaporation.
The pink sugar is already dissolved in the water but the sand remains undissolved in the water hence it can be filtered off. The filtrate now contains the sugar.
The sugar is obtained from the filtrate by evaporation of the solution to yield the solid pink sugar and steam which can be condensed again to give liquid water.
(1) Complete the word equation for the complete combustion of methane in
oxygen.
→ water +
methane +
en of methane can produce carbon and
Cooled in ice to help the water vapour condense. Tube 2 – contains lime water, goes cloudy to show the presence of carbon dioxide. Word equation: (hydrocarbon + oxygen → carbon dioxide + water) Methane + oxygen → carbon dioxide + water.
Gary wanted to find out if some food colourings contained a banned food dye.
He put a drop of each food colouring and the banned food dye onto some special paper.
He hung the paper in a beaker of water.
After 10 minutes, the banned food dye and some of the dyes from the food colourings had moved up the paper.
Gary’s results are shown below.
(a) Gary wrote the labels on the paper in pencil. Why should he not write them in ink?
Explanation:
njsnjsjiwnaibainaondodnodn9nsine8ni
ito Ang naimbento ni graham bell na nagpabilis sa pakikupagtalastasan
Answer:
ФОТОГРОФИРУЙ
ИЛИ НАПИШИ
В КОМЕНТЫ
How many grams of Mg would be needed to react with 6.0 moles HCl?
Answer:
72g
Explanation:
The balanced equation of the reaction between Magnesium (Mg) and hydrochloric acid (HCl):
Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g)
Based on this equation, 1 mole of Mg needs to react with 2 moles of HCl.
Hence, 6 moles of HCl will need to react with 6 × ½ = 3 moles of Mg.
Using the formula; mole = mass/molar mass
Molar mass of Mg = 24g/mol
3 = mass/24
mass = 72g.
What is the oxidation number of carbon in the compound carbon dioxide, CO2?
A) +3
B)+2
C)-3
D)+4
Answer:
the oxidation number is 4
can some kind soul help me plss
convert propanamine to propylalcohol
Answer:
Yeah
Explanation:
Propylene glycol can be dehydrated to propionaldehyde which can in turn be reductively aminated to propylamine.
Propionaldehyde can be converted to n-propyl amine in two steps.
Conversion of propionaldehyde to oxime
Propionaldehyde is treated with hydroxyl amine in weakly acidic medium to form imine product known as propionaldoxime.
CH₃CH₂CHO+NH₂OH->CH₃CH₂CH=N-OH+H₂O
Reduction of imine to form amine
In this step,propionaldoxime is reduced by proper reducing agent like Na in ethanol to form n-propyl amine.
CH₃CH₂CH=NO-Na-C₂H5OH-> CH₃CH₂CH₂NH₂
An unknown substance has the chemical formula: Fez(C204)3 A molecule of the unknown substance contains A 3 fluorine atoms, 2 calcium atoms, and 4 oxygen atoms. 2 iron atoms, 6 carbon atoms, and 12 oxygen atoms. , 2 iron atoms, 2 carbon atoms, and 12 osmium atoms. 1 fluorine atom, 2 europium atoms, 8 copper atoms .
Answer:
Explanation: It is an ionic compound Fe2(C2O4)3
The compound with the formula Fe₂(C₂O₄)₃ contains two iron atoms, 6 carbon atoms and 12 oxygen atoms. Thus option C is correct.
What is chemical formula?Chemical formula of a compound or molecule represent the identity of the compound by representing which atoms are present in how many numbers.
Chemical formula is significant in representing a compound and distinguish it from other compounds.The number of each atom are given as subscripts for the symbol of each atoms.
If any group of atoms such SO₄ group or CO₃ group repeats in the compound put them in brackets and their number is given outside.The compound Fe₂(C₂O₄)₃ contains 2 iron atoms because Fe is the symbol of iron.
C₂O₄ is oxalate group and it is 3 in number. Two carbon and 4 oxygens are there in one oxalate group. Thus there are total 6 carbons and 12 oxygens in 3 oxalate groups. Hence option C is correct.
To find more about chemical formula, refer the link below:
https://brainly.com/question/29031056
#SPJ2
i would appreciate it if someone could show me the net ionization reaction for the following equation:
CaCl2(aq) + 2NaHCO3 -> CaCO3 + 2NaCl + CO2 + H2O
thanks in advance!!
Answer:
Deduce the balanced chemical equation:
CaCO3(s) + 2HCl(aq) > CaCl2 + H2O(l) + CO2(g)
2. Write as ionic species:
Ca2+(aq) + CO3 2- (aq) + 2H+ + 2Cl- > Ca2+(aq)+ 2Cl-(aq) + H2O(l) + CO2(g)
3. Identify ions on the right that also appear on the left, and eliminate them. (As Robert Cruikshank says, these are known as ’spectator ions’ and take no overall part in the reaction):
CO3 2- (aq) + 2H+(aq) > H2O(l) + CO2(g)
This is the balanced ionic equation.
The reaction O3 + NO → O2 + NO2 has Ea = 10.7 kJ/mole and ΔH = – 199.8 kJ/mole. What is the activation energy for the following reaction?
O2 + NO2 → O3 + NO
Answer:
Ea = 210.5kJ/mole
Explanation:
When the reaction:
O3 + NO → O2 + NO2
Occurs, requires 10.7kJ/mole and releases -199.8kJ/mole.
For the forward reaction:
O2 + NO2 → O3 + NO
The Ea is the sum of Ea of the forward reaction and - ΔH, that is:
Ea = Ea - (-ΔH)
Ea = 10.7kJ/mol - (-199.8kJ/mol)
Ea = 210.5kJ/mole
Why is the death of a Star important for our life on Earth?
Explanation:
The reason why stars are so important is that they have helped humans navigate through Earth. When it was dark these stars would light up the sky giving people lightly. In addition, stars are very important because they make life on Earth. ... Earth would just be a rock with ice.
Explain how the percentages of nitrogen , oxygens and carbon dioxide in the earth atmosphere today have changed from the earth
Answer:
See below
Explanation:
The atmosphere of the earth hundreds of millions of years ago was only water vapour and carbon, both from the one ocean that existed around the continental body of Pangea. The photosynthesis process and exache (⊕) caused the percentages to decrease.