Answers
Answer:
check my explanation
Explanation:
it is the secondary consumer because it doesn't eat grass
Related Questions
What is the percent by mass concentration of 1000 ml of a solution (d=1.5 g/ml) that contains 50 g of solute in it?
Answers
Answer: The percent by mass concentration is 33.3 %
Explanation:
Mass percent is the ratio of mass of solute to the mass of solution in terms of percentage.
mass of solute = 50 g
mass of solution = [tex]{\text {density of solution}}\times {\text {volume of solution}}=1.5g/ml\times 1000ml=1500g[/tex]
Mass percentage = [tex]\frac{50g}{1500g}\times 100\%=33.3\%[/tex]
Thus percent by mass concentration of 1000 ml of a solution (d=1.5 g/ml) that contains 50 g of solute in it is 33.3 %
Based on Reference Table F, which salt is the strongest electrolyte?
1.
CaCO3
2.
Na2SO4
3.
AgCI
4.
Zn3(PO4)2
Answers
Answer:
Na2SO4
Explanation:
Na2SO4 dissociates completely in solution to yield ions therefore it is the strongest electrolyte.
The question is incomplete as the table is missing but I will try to explain as generally as possible. Recall that an electrolyte is a compound that conducts electricity in solution.
Also recall that the number of ions available in solution determines the electrolytic strength of a substance. Hence, Na2SO4 dissociates completely in solution to yield ions therefore it is the strongest electrolyte.
Learn more about electrolytes: https://brainly.com/question/1301963
Provide a set of step by step instructions to make 750 mL of 1.5 M calcium chloride solution.
Answers
Answer: PLease see answer in explanation column
Explanation:
FIRST STEP
We find the grams ( mass ) of solute required to prepare the solution by using the formula
grams ( mass ) of solute, g(CaCl2)= Molar mass x Molarity of the solution x Volume of the solution
Therefore Preparing 750 mL of 1.5 M calcium chloride solution, we have that Molar mass of Calcium chloride =110.98 g/mol
g(CaCl2) =110.98 g/mol X 1.5mol/L X 0.75L
g(CaCl2) =124.8525g CaCl2
SECOND STEP
Now Dissolve 124.8525g CaCl2 in about 350ml of distilled water then add more water until the final volume be comes 750ml
In a redox reaction,
the oxidizing agent undergoes oxidation
the reducing agent undergoes reduction
the oxidizing agents undergoes reduction
O the oxidizing agent loses electrons
Answers
Answer:
the oxidizing agent undergoes oxidation and
the reducing agent undergoes reduction simultaneously
what is a pure substance?
Answers
Answer:
A pure substance is a substance or an element whose impurities are extracted by concentration by chemical means.
e.g Aluminium is made pure by concentration of it's ore, bauxite by treatment with excess Sodium Hydroxide solution.
Which of the following metals would be the best to choose for making jewellery? Aluminium, iron, copper or gold?
Answers
Answer:
Of course the answer is gold
Explanation:
Gold is used for making jewellery and not aluminium,iron or copper
Answer:
copper or gold.
Explanation:
Copper is also a good material for accessories. Even in the ancient times, those who can’t afford gold jewelry wear copper jewelry instead. It offers design flexibility too due to its high ductility.
B.Use the words inside the box to complete the chart below
Answers
Answer:
Answered below
Explanation:
>> ice is solid
>> water is liquid
>> Steam is gas
>> Ice → water = melting
>> water → steam = evaporation
>> steam → water = condensation
>> water → ice = freezing
Chromatogram results are considered to have better resolution if the RF values of the components being separated or further apart rather than closer together
Answers
Answer:
False
Explanation:
False : It is better they are closer together
The RF ( retention factor ) is calculated with this formula
= distance travelled / distance travelled by solvent
And the larger the RF factor of a compound the less polar the compound ( i.e. it will not stick to the stationary phase ) hence it is better the RF values of the components to be closer
Answer:
True
Explanation:
The resulting Rf factor, which has no units, is dependent upon the specific stationary and mobile phase used. Chromatogram results are considered to have better resolution if the Rf values of the components being separated are farther apart (e.g. 0.3 and 0.7) rather than closer together (e.g. 0.4 and 0.5). The distance the compound moves relative to the distance the solvent (or mobile phase or eluent) moves is a characteristic of that compound. (where Rf is equal to distance compound moved divided by solvent front distance)
How do I balance
H2O ⇾ H2 + O2
Answers
How many atoms are contained in 12.8 g of Beryllium?
A9.0 atoms
B9.0 x 10 23 atoms
C8.55 atoms
D8.55 x 1023 atoms
Answers
Answer:
a atoms
Explanation:
Answer:
C. 8.55 atoms
Explanation:
Name the following carboxylic
acid:
COOH
A. 1-methylpentanoic acid
B. 2-methylpentanoic acid
C. 1-methylbutanoic acid
D. 5-ethylpentanoic acid
Answers
Answer:
methylpentanoic acid,,,,,I guess so
The following carboxylic acid is 2-methylpentanoic acid.
What is a carboxylic acid?A carboxylic acid is an organic compound that contains the carboxyl functional group. The general formula for a carboxylic acid can be abbreviated as R−COOH.
Pentanoic acid can be prepared by reacting a butyl halide with magnesium to obtain a Grignard reagent, which is further reacted with carbon dioxide to give valeric salt.
Hence, the following carboxylic acid is 2-methylpentanoic acid.
Learn more about the carboxylic acid here:
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30 point. What is formed when a hydroxyl group is substituted for a hydrogen?
Answers
Yeah it’s that
Answer:
alcohol
Explanation:
please help :( this is for science.
Answers
Please help with this
Answers
Why: because o know
why is the absolute dating of rocks important?
Answers
Answer:
The dating of rocks is important because:
Explanation:
its important to know how the rocks have changed.
Most of the matter making up the earth is composed of
A. gases
B. compounds
C. mixtures
Answers
Most of the matter making up earth is composed of compounds. I think
How many grams is 2.40 x 1023 molecules of N,O,? (5 pts)
PLS HELP ASAP
Answers
Answer:
30.26 grams of N₂O₃
Explanation:
Divide by Avogadro's number. This leaves you with the number of moles. Then, multiply by the molar mass of N₂O₃
Marble is made from limestone under the influence of heat and pressure. The chemical formula for limestone or marble
chips is CaCO3. When you added the chips to the acid solutions, they effervesced (bubble or foam).
1. What is the gas that is produced?
2. What is the chemical formula of the gas?
3. How could you test rocks for the presence of limestone?
4. Write a balanced symbol model for the reaction of limestone with hydrochloric acid.
Answers
Answer:
what is the gas that is produced.
b) How many moles of Na2O can be produced from 13.5 moles Na?
Answers
Answer: 6.75 moles of [tex]Na_2O[/tex] can be produced from 13.5 moles Na
Explanation:
The balanced chemical equation for formation of [tex]Na_2O[/tex] from Na is:
[tex]4Na+O_2\rightarrow 2Na_2O[/tex]
According to stoichiometry :
4 moles of Na give = 2 moles of [tex]Na_2O[/tex]
Thus 13.5 moles of [tex]Na[/tex] give =[tex]\frac{2}{4}\times 13.5=6.75moles[/tex] of [tex]Na_2O[/tex]
Thus 6.75 moles of [tex]Na_2O[/tex] can be produced from 13.5 moles Na
A 5.0-g sample of Substance X increases in temperature from 20.0°C to 22.0°C when it absorbs 9.6J of heat. What is the specific heat of
Substance X in J/g °C)?
Answers
Answer:
0.96 J/g °C
General Formulas and Concepts:
Thermochemistry
Specific Heat Formula: q = mcΔT
m is mass (in grams)c is specific heat (in J/g °C)ΔT is change in temperature, final - initial (in °C)Explanation:
Step 1: Define
[Given] m = 5.0 g
[Given] ΔT = 22.0 °C - 20.0 °C = 2.0 °C
[Given] q = 9.6 J
[Solve] c
Step 2: Solve for c
Substitute in variables [Specific Heat Formula]: 9.6 J = (5.0 g)c(2.0 °C)[Specific Heat] Multiply: 9.6 J = (10. g °C)c[Specific Heat] Isolate c: 0.96 J/g °C = c[Specific Heat] Rewrite: c = 0.96 J/g °C10. What is the Kinetic Energy of a 100 kg object that is moving with a speed of 13.5 m/s?
Answers
Answer:
[tex]100 \times 13.5 = ikw n bahaa[/tex]
IKAW na mag tayms
Help please!!! I'll name you brainliest!!
Answers
C
Hope this helps.
Answer: pls mark brainliest
Explanation: i think so its D
1. What is the molar mass of sodium?
11
O
45.90
23
О
16
Answers
Answer:
11
Explanation:
Sodium is a chemical element with the symbol Na and atomic number 11.
Answer:
22.99g/mol (in this case 23g/mol)
Which substance is the BEST example of a compound?
Orange Juice
Salt Water
Hydrogen
Water
Answers
Answer:
I think hydrogen because Hydrogen combined with one atom with oxygen and in hydrogen peroxide. It has two atoms of hydrogen and 2 atoms of oxygen. Therfore it should be a compound.
Please help me
Calculate the pH of a 7.75x10^-12 M Hydrobromic acid solution. Ph=______(round to 4sig figs). The solution is?________(acidic/basic)
Answers
Answer:
pH = 6.999
The solution is acidic.
Explanation:
HBr is a strong acid, a very strong one.
In water, this acid is totally dissociated.
HBr + H₂O → H₃O⁺ + Br⁻
We can think pH, as - log 7.75×10⁻¹² but this is 11.1
acid pH can't never be higher than 7.
We apply the charge balance:
[H⁺] = [Br⁻] + [OH⁻]
All the protons come from the bromide and the OH⁻ that come from water.
We can also think [OH⁻] = Kw / [H⁺] so:
[H⁺] = [Br⁻] + Kw / [H⁺]
Now, our unknown is [H⁺]
[H⁺] = 7.75×10⁻¹² + 1×10⁻¹⁴ / [H⁺]
[H⁺] = (7.75×10⁻¹² [H⁺] + 1×10⁻¹⁴) / [H⁺]
This is quadratic equation: [H⁺]² - 7.75×10⁻¹² [H⁺] - 1×10⁻¹⁴
a = 1 ; b = - 7.75×10⁻¹² ; c = -1×10⁻¹⁴
(-b +- √(b² - 4ac) / (2a)
[H⁺] = 1.000038751×10⁻⁷
- log [H⁺] = pH → 6.999
A very strong acid as HBr, in this case, it is so diluted that its pH is almost neutral.
Nuclear changes differ from normal chemical changes in that all nuclear changes
Answers
Answer:
(1) Nuclear reactions entail a transition in the nucleus of an atom, which normally results in the formation of a new substance. Chemical reactions, on the other hand, only involve electron rearrangement and do not involve nuclei modifications. (4) Nuclear reactions are unaffected by the element's chemical form.
Explanation:
Hope this helps!
Please mark me as Brainlinieast.
What causes polar bonds
Answers
Answer:
Bonds are polar when one element in a compound is more electronegative than the other. This creates a dipole in the molecule where one end of the molecule is partially positive and one end is partially negative
Explanation:
Select the correct answer.
What does an atom gain or lose in an oxidation-reduction reaction?
A.
protons
B.
oxygen
C.
neutrons
D.
electrons
Answers
Answer:
D The atom gains an electron in an oxidation-reduction reaction.
A buffer solution is prepared by adding NaH2PO4
to a solution of H3PO4 (phosphoric acid).
H3PO4(aq) = H+ (aq) + H2PO4 - (aq)
What happens if HCl is added?
Answers
In the case when the HCI should be added so it should be shifted to reactants.
What is a buffer solution?It is the solution that should be considered as the aqueous solution that comprise of the mixture of the weak acid and the conjugate base.
Here the ph level should be change very less at the time when the small amount of the strong acid should be added.
Therefore, it should be shifted to reactants.
Learn more about solution here: https://brainly.com/question/20856989
The process by which sand is formed from rocks are...
Question 1 options:
melting and cooling
compaction and cementation
heat and pressure
weathering and erosion
Answers
Answer:
weathering and erosion
Explanation:
Sand forms when rocks break down from weathering and eroding over thousands and even millions of years. Rocks take time to decompose, especially quartz (silica) and feldspar. Often starting thousands of miles from the ocean, rocks slowly travel down rivers and streams, constantly breaking down along the way.
Answer:
weathering and erosion
