PLEASE HELL ASAP WILL GIVE BRAINLEAST TI CORRECT ANSWER

Explanation:

Because sickle-cells have trouble traveling through the smallest blood vessels, which means that muscles and tissue are not getting oxygen they need.

Answer:

Zn is the excess reactant and remain 5.94g

Explanation:

The reaction of Zn with HNO3 is:

Zn + 2 HNO3 → H2 + Zn(NO3)2

1 mole of Zn reacts with 2 moles of HNO3

To solve this question we must convert the mass of each reactant to moles in order to find limiting reactant. Thus, we can kknow the moles of excess reactant that will not react:

Moles Zn -Molar mass: 65.38g/mol-:

10.00g * (1mol / 65.38g) = 0.1530 moles Zn

Moles HNO3 -Molar mass: 63.01g/mol-:

7.84g * (1mol / 63.01g) = 0.124 moles HNO3

For a complete reaction of 0.124 moles of HNO3 are required:

0.124 moles HNO3 * (1mol Zn / 2 mol HNO3) = 0.0622 moles Zn. As there are 0.1530 moles, Zn is the excess reactant and will remain:

0.1530 moles - 0.0622 moles = 0.0908 moles Zn

The mass is:

0.0908 moles Zn * (65.38g / mol) =

Answer:

Double replacement

Explanation:

Answer:

a. 3; b. 5; c. 10; d. 12

Explanation:

pH is defined as the negative log of the hydronium concentration:

pH = -log[H₃O⁺] (hydronium concentration)

For problems a. and b., HCl and HNO₃ are strong acids. This means that all of the HCl and HNO₃ would ionize, producing hydronium (H₃O⁺) and the conjugate bases Cl⁻ and NO₃⁻ respectively. Further, since all of the strong acid ionizes, 1 x 10⁻³ M H₃O⁺ would be produced for a., and 1.0 x 10⁻⁵ M H₃O⁺ for b. Plugging in your calculator -log[1 x 10⁻³] and -log[1.0 x 10⁻⁵] would equal 3 and 5, respectively.

For problems c. and d. we are given a strong base rather than acid. In this case, we can calculate the pOH:

pOH = -log[OH⁻] (hydroxide concentration)

Strong bases similarly ionize to completion, producing [OH⁻] in the process; 1 x 10⁻⁴ M OH⁻ will be produced for c., and 1.0 x 10⁻² M OH⁻ produced for d. Taking the negative log of the hydroxide concentrations would yield a pOH of 4 for c. and a pOH of 2 for d.

Finally, to find the pH of c. and d., we can take the pOH and subtract it from 14, giving us 10 for c. and 12 for d.

(Subtracting from 14 is assuming we are at 25°C; 14, the sum of pH and pOH, changes at different temperatures.)

Answer:

A hydrocarbon and oxygen

Explanation:

hydrocarbon is being burned, and oxygen is necessary to burn things

To solve such this we must know the concept of Combustion reaction. The  two reactants that are necessary in order for a hydrocarbon combustion reaction to take place are hydrocarbon and oxygen.

Balanced equation is the one in which the total number of atoms of a species on reactant side is equal to the total number of atoms on product side.

Combustion reaction is a reaction in which a substance, basically hydrocarbons burns in presence of oxygen to produce carbon dioxide and water.  The  two reactants that are necessary in order for a hydrocarbon combustion reaction to take place are hydrocarbon and oxygen.

Therefore, hydrocarbon and oxygen are two reactant that are necessary in order for a hydrocarbon combustion reaction to take place.

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Answer:

Heat is something you can't control

Explanation:

Plastic is something you could control like moving it around

Answer:

10

Explanation:

Answer:

NaHCO3 → H2O + CO2 + Na2CO3

Explanation:

Answer:

D. 1.0 x 10-8.43

Explanation:

The pH is an unit of concentration in chemistry used to determine the acidity -or basicity- of a particular solution. Is used in quality control to determine the security of a product for consumers.

The equation is:

pH = -log [H₃O⁺]

As pH = 8.43:

8.43 = -log [H₃O⁺]

10^-8.43 = [H₃O⁺]

1.0x10 -8.43 = [H₃O⁺]

Right option is:

Answer:

11 atoms N

Explanation:

Answer:

check my explanation

Explanation:

it is the secondary consumer because it doesn't eat grass

Answer:

addd me :)

Explanation:

hehehehehe

Answer:

cool. No problem ◉⁠‿⁠◉◉⁠‿⁠◉◉⁠‿⁠◉◉⁠‿⁠◉◉⁠‿⁠◉◉⁠‿⁠◉◉⁠‿⁠◉

Answer:

-205.7kj

Explanation:

Now adding reaction 2 and twice of reaction 3 and reverse of reaction 1, we get the enthalpy of the reaction.

The expression for enthalpy for the following reaction will be,

where,

n = number of moles

Now put all the given values in the above expression, we get:

Therefore, the enthalpy of the following reaction is,  -205.7kj

Answer:

This is the answer

Explanation:

Answer: The tree died 9709.46 years before.

Explanation:

Expression for rate law for first order kinetics is given by:

[tex]t=\frac{2.303}{k}\log\frac{a}{a-x}[/tex]

where,

k = rate constant  

t = age of sample

a = let initial amount of the reactant = 100

a - x = amount left after decay process = [tex]\frac{30}{100}\times 100=30[/tex]

a) to find rate constant

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

[tex]t_{\frac{1}{2}}=\frac{0.693}{k}[/tex]

[tex]k=\frac{0.693}{5600years}=1.24\times 10^{-4}years^{-1}[/tex]

b) to know the age

[tex]t=\frac{2.303}{1.24\times 10^{-4}}\log\frac{100}{30}[/tex]

[tex]t=9709.46years[/tex]

The tree died 9709.46 years before.

Answer:

I do not know

Explanation:

I am vert sorry but I do not know the answer.

Answer:

No. Light is not a physical thing, so it cannot change physical things like glue.

Explanation:

Light is not effective at all to glue, it doesn't do anything at all.

Answer:

d. It maintains the distances between planets.

Explanation:

Answer:

D. Alkali metal ions will not have a negative  one charge; they will have a positive one  charge

Explanation:

Alkali metals are a found towards the left hand side of the periodic table. The comprise of Li, Na, K, Rb, Cs and Fr.

They form univalent positive ions such as Cs^+, Na^+ etc. They do not form negative ions but give out one electron to form the sort of ions stated above. Recall that metals are electropositive in nature (donate electrons).

The mistake made by Shanice is to say that group 1 elements have a negative one  charge.

Answer:

sweat is the water that comes out of your body when you workout

Answer:

The answer is Y

Explanation:

:p

Explanation:

the equation must be

4NH3 + 5O2–> 4NO + 6H2O

Answer:

Density = mass/volume so the answer is 6g/ml

Explanation:

The first to dissolve is the solute in tank B. The amount of a substance that dissolves in a specific solvent concentration at a specific temperature is known as its solubility.

The introduction of a solute to a solvent is the first stage in the dissolving process. The molecules of these two substances begin to interact, causing the solute molecules to disperse and become encircled by solvent molecules.

In water, salt, sugar, and coffee all dissolve. They disintegrate quickly. They typically dissolve more rapidly and completely in hot or warm water. Even very hot water won't be able to dissolve sand or pepper.

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Answer:

Many natural scents that are appealing to humans actually repel mosquitoes, including lavender, peppermint, basil, and eucalyptus. Many of these scents can be worn as an essential oil on your skin to help keep these pesky pests from biting you.

Answer:

Required number is the vertical coordinate of the intersection point of a line at 60°C with the graph of the KNO₃.

Answer:

Explanation:

Chemical equation

Answer:

Saturated fat occurs naturally in red meat and dairy products. It's also found in baked goods and fried foods. Trans fat occurs naturally in small amounts in red meat and dairy products. Trans fat can also be manufactured by adding hydrogen to vegetable oil.