Describe the test for hydrogen. Give the result of the test.

Answer:

The correct answer is - discovering or diagnosing the disease.

Explanation:

According to the question, this technology includes genetically modifying a common virus in order to destroy or kill the deadly brain tumor without affecting normal cells around the tumor, this technique is genetic engineering.

This technique can help in treating or curing the disease by killing the tumor cells and make them non-lethal. It can also prevent the tumor cells to grow and make them controlled. There is nothing mention related to diagnosing the disease in the question and it is not possible to find this tumor with help of such a technique.

The true statement about the Moon is: A. The Moon is always moving around Earth in a circle.

A Moon can be defined as the natural satellite of planet Earth that shines due to the Sun's reflected light, as it revolves around the Earth from west to east in 29½ days.

Generally, there are four (4) primary Moon phases and these are:

In conclusion, the true statement about the Moon is that it is always moving around Earth in a circle.

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Answer:

2.95078 × 10^23

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Answer:

Cell division is central to organism growth, reproduction and tissue repair.

Explanation:

Hope this helps!

Answer:

multiply, survive grow

Answer:

Oceans, Fossil fuels, atmosphere

Answer:

a) Cell theory

Explanation:

Cell theory states that cells are the basic unit of life

During meiosis 1, the parent cell with double the normal amount of chromosomes, splits into two diploid cells (have enough chromosomes to survive). During meiosis 2, the two diploid cells each split into two haploid cells (have half the amount of chromosomes to survive). Meiosis ends with four haploid cells.

Answer:

Sodium hydroxide us formed during the electrolysis of sodium chloride solution.

Explanation:

During electrolysis, hydrogen and chloride ions are removed from the solution, whereas sodium and hydroxide ions are left behind in solution.

Hope this helped

Explanation:

so moles = mass ÷ mr (1+ 79.9)

so 10.00g ÷ 80.9

which is 0.1236093943

so to 3 S.F is 0.124 moles

also there is 1 to 1 ratio for LiOH to HBr

hope this helps :)

Explanation:

Second answer is the correct one.

Explanation:

HOPE IT HELPS

THANKS

Answer:

N₂

Explanation:

Sodium is a larger molecule with a much higher molecular weight. However, 20g of N₂ would be a smaller amount of molecules than 20g of sodium due to how there are multiple nitrogen molecules.

2/3 * given mass of N₂ = mass of N₃

N₃ (Azide ion) given mass = 20g

Na = 20g

Masses of chemicals are equal

Na = 22.990g/mol

20g/22.990g/mol = 0.8699mol of Na

N₃ = 20g

N₃ = N g/mol x 3

N = 14.007 g/mol

14.007 x 3 = 42.021 g/mol

N₃ = 42.021g/mol

20g/42.021g/mol = 0.4759 mol of N₃

Notice how there are fewer moles of the Azide ion than the Sodium.

0.4759 moles of NaN₃ is produced

combine molecular weights:

42.021 + 22.990 = 65.011 g/mol

multiply by amount of moles of the limiting reactant:

0.4759 mol *65.011 = 30.942 g

Also, here is the balanced equation:

3N₂ + 2Na = 2NaN₃

The results are the same as the balanced equation.

Answer:

C.4

Explanation:

Answer:

4Fe + 3O2 → 2Fe2O3

Answer  b

Explanation:

Answer: B. Isotopes of the same element have the same number of neutrons and a different number of protons.

Explanation: Founders Educere answer.

Good luck my fellow summer school students, I love you all.

Please rate, thanks, & vote brainliest, I want a rank up already.

Answer:

15.64 moles

81.8% (3 s.f.)

Explanation:

Let's start by writing a balanced equation.

N₂ +H₂ → NH₃

To balance the equation, ensure that the number of atoms of each element is the same on both side of the arrow. On the left, we have 2 N atoms and only 1 N on the right. Thus, write '2' in front of NH₃ to balance the N.

N₂ +H₂ → 2NH₃

Now, balance the number of H atoms. Currently, there are 2 Hs on the left and 6 Hs on the right. To balance the equation, write a 3 in front of H₂.

N₂ +3H₂ → 2NH₃

The equation is now balanced.

[tex]\boxed{N₂ +3H₂ → 2NH₃}[/tex]

Given that hydrogen is in excess, the number of moles of NH₃ is dependent on the number of moles of N₂, which is the limiting reactant.

The mole ratio of N₂ to NH₃ produced is 1: 2.

Thus with 7.82 mol of N₂,

number of moles of NH₃

= 2(7.82)

= 15.64 moles

This is the theoretical yield since the calculations were based from the chemical equation.

However, in reality, the percentage yield may not be 100% as some products are lost in the process.

[tex]\boxed{percentage \: yield = \frac{actual \: yield}{theoretical \: yield} \times 100\%}[/tex]

∴ Percentage yield of NH₃

[tex] = \frac{12.8}{15.64} \times 100\%[/tex]

= 81.8% (3 s.f.)

Answer:

A synthesis reaction is a type of reaction in which multiple reactants combine to form a single product. Synthesis reactions release energy in the form of heat and light, so they are exothermic. An example of a synthesis reaction is the formation of water from hydrogen and oxygen.

Answer:

Copper hydroxide is the correct answer.

Explanation:

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Answer:

Kc ≅ 100 (1 sig. fig.)

Explanation:

              2NH₃(g)       ⇄      N₂(g)   +   3H₂(g)

C(i)         3.00 mol/L             0                0

ΔC             -2x                       +x              +3x

C(eq)     0.600 mol/L            x                3x

3.00 - 2x = 0.600  =>  x = 3.00 - 0.600/2 = 1.2 mole/L

At equilibrium Kc = [N₂][H₂]³/[NH₃]² = (x)(3x)³/(3·1.2)² = (1.2)(3.6)³/(0.600)² = 155.52 (calculator)

Rounds to 1 sig. fig. based on given 3.00 moles NH₃(g)' Kc ≅ 100.

Answer:

I would recycle, reuse, and reduce the litter on this already hurt Earth.

Explanation:

Answer:

I can go out and help pick up garbage and i can recycle and not litter and i can reuse all the plastic water bottles i drink.

Explanation:

Im glad you care about mother earth to

Answer:

B

Explanation:

it will not be waterproof anymore

Answer:

pH = 1.522

Explanation:

HCl + H20 -> Cl^(-) + H30^(+)

0.03M ____ ____

____ 0.03M 0.03M

[H30^(+)] = 0.03M

pH = - log([H30^(+)])

pH = - log( 0.03)

pH = 2 - log3

pH = 2- 0.47

pH = 1.522

The pH of the hydrogen chloride, HCl solution having a concentration of 0.03 M is 1.52

This is simply a measure of the acidity / alkalinity of a solution.

The pH measures the hydrogen ion concentration while the pOH measures the hydroxide ion concentration

Dissociation equation

HCl(aq) —> H⁺(aq) + Cl¯(aq)

From the balanced equation above,

1 mole of HCl contains 1 mole of H⁺.

Therefore,

0.03 M HCl will also contain 0.03 M H⁺

pH = –Log H⁺

pH = –Log 0.03

pH = 1.52

Learn more about pH:

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Answer: B.     3-bromo-5-ethyl-2-methyloctane

Explanation:

The correct name of the compound as we can see is 3-bromo-5-ethyl-2-methyloctane.

The IUPAC nomeclature shows the standard,,  approved pattern for naming organic compounds. As a matter of fact it is intended to enable pratitioners to write the name of a compound from structure.

The correct name of the compound as we can see is 3-bromo-5-ethyl-2-methyloctane.

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Answer:

0.95 moles

Explanation:

I believe that this is the equation we are looking at since this is an acid- metal reaction, thus the products would be a salt and hydrogen gas (H₂):

Zn +2HCl → ZnCl₂ +H₂

The limiting reactant is the reactant that we do not have enough of for the reaction to continue. From the balanced equation, the mole ratio of Zn to HCl is 1: 2. This means that for every 1 mole of Zn, 2 moles of HCl is needed.

Let's calculate the number of moles of HCl needed to react with 0.95 moles of Zn.

Number of moles of HCl required

= 0.95 ×2

= 1.9 moles

Since we have 6.2 moles of HCl, HCl is in excess and thus Zn is the limiting reactant. For 6.2 moles of HCl, 3.1 moles of Zn would be needed but we only have 0.95 moles.

For every 1 mole of Zn, 1 mole of H₂ is produced.

Thus, since 0.95 moles of Zn has reacted,

number of moles of H₂ produced= 0.95 moles

Answer:

solid=(s)

Explanation:

A solubility table may be something your class may want you to memorize. Where an aqueous (aq) solution is formed by a soluble compound dissolving in water, our solvent. So if we refer to this solubility table, it says phosphate (PO4) is usually insoluble, so in the reaction it won't break down in water and will stay as a solid (s). The only exceptions are group 1 alkali metals or ammonium (NH4+).

Answer:

Prophase I

Sorry if wrong I was rushing !!

Answer:

0.233M

Explanation:

M1 = 0.700M

V1 = 2L

V2 = 3L

M2 = ?

M1V1 = M2V2

(0.700)(2) = M2(3)

M2 = 0.233M