Please answer any of these
I’ll be grateful and I’m marking brainliest

Answer:

4. A gene is introduced into salmon to make them grow twice as fast.

Answer: 0.28 mol H2

Explanation:

0.57mol HCl         1mol H2          

                             2mol Hcl

Hydrochloric acid and zinc show the displacement reaction to produce hydrogen gas and zinc chloride. 0.57 moles of hydrochloric acid and excess zinc react to produce 0.28 mol H₂.

A displacement reaction is the removal of one of the elements from the reactant with highly active species of the reactivity species to produce the products. It can be a single or double displacement reaction.

The balanced chemical displacement reaction is given as:

2 HCl + Zn → H₂ + ZnCl₂

Here, two hydrochloric acids react with zinc to form one mole of hydrogen gas and one mole of zinc chloride.

Given,

Hydrochloric acid = 0.57 moles

Using proportions to calculate moles as:

If 2 moles of HCl = 1 mole H₂

Then, 0.57 moles = X moles

X = 0.57 ÷ 2

= 0.28 mol H₂

Therefore, 0.57 mole HCl produces 0.28 moles of hydrogen gas.

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Answer:

1 AMU

Explanation:

Protons, neutrons, and electrons: Both protons and neutrons have a mass of 1 amu and are found in the nucleus.

Explanation: The elements in the modern periodic table are arranged in order of their atomic numbers, which is the number of protons in the nuclei of the atoms of an element. Each element has a unique atomic number.

Answer:

[tex] \: \: \: \: [/tex]

correct me if I'm wrong

Answer: B.

Explanation:

Answer:

good times

Explanation:

always nedded

Here the nuclear decay of phosphorous to give S-32 is an example of beta-decay. Hence, the emitted particle is an electron. Thus, option b is correct.

The heavy unstable radioactive isotopes undergo nuclear decay by the emission of alpha or beta particle. Thus, there are mostly two types of decays, alpha decay and beta decay.

In alpha decay, the isotope emits a helium nuclei. Hence, mass number decreases by 4 units and atomic number decreases by 2 units. In beta decay, mass number does not change but atomic number increases by 1.

Here, P-32 undergo beta -decay by emitting an electron to form S -32. Hence, atomic number is increased by one. Therefore, the mission product is an electron option b.

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1 atom Mg, 2 atoms O and 2 atoms H.

1 + 2 + 2 = 5, so correct answer is C

Answer:

Soil helps anchor plants and provides them essential elements of water and nutrients. Plants prevent soil erosion and provide organic matter.

Explanation:

The frequency of the X - ray is [tex]7.95 \times 10^{28} \ Hz[/tex].

The given parameters:

The frequency of the wave is calculated as follows;

[tex]E = hf\\\\f = \frac{E}{h} \\\\[/tex]

where;

Substitute the given parameters;

[tex]f = \frac{E}{h} \\\\f = \frac{5.27 \times 10^{-5} }{6.626 \times 10^{-34}} \\\\f = 7.95 \times 10^{28} \ Hz[/tex]

Thus, the frequency of the X - ray is [tex]7.95 \times 10^{28} \ Hz[/tex].

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Answer:

The electron microscope is the answer.

Answer:

In order for the powder to dissolve, each powder molecule must separate from the other powder molecules and be surrounded by water molecules. This shift in arrangement either absorbs or releases energy depending on the situation. It is due to the exchange of energy that the temperature of the solution fluctuates.

Explanation:

:)

Answer:

Arrange them in order of greatest to least Molar Mass to get most dense to least dense at a given temperature and pressure.

Explanation:

"Given Temperature and Pressure" just tells you that those two variables are being held constant. The Ideal Gas Law (PV = nRT) shows that n (the # of moles) and V (the volume) are variable still. To keep pressure constant, we need to increase the volume so that the force per area is the same which would unfortunately lower the density. The only way for a gas to have the greatest density would be to have the least average kinetic energy to keep the pressure constant at a smaller volume. This is because kinetic energy is equal to KE = 1/2 m v^2, where m is mass in kilograms and v is the velocity. IT IS CRUCIAL TO NOTE THAT ACCORDING TO KINETIC MOLECULAR THEORY, ALL GASES HAVE THE SAME AVG. KINETIC ENERGY WHEN AT THE SAME TEMPERATURE. So since the avg. KE is also constant across these answers due to the temp. being constant, our only way to decrease the velocity (the rate at which the particles are moving per second) and in turn the number of collisions (to repeat, a smaller number of collisions is desired because they are equal to the pressure that must maintained at a constant value at the smallest volume possible to achieve highest density possible) is to increase the molar mass. This is also pretty intutive for the other part of the issue: since Density is a broken heart (m/v), a higher molar mass would ensure a smaller pressure (due to decreased velocity) and smaller volume (due to constant pressure). Okay, now order the gases heaviest to lightest in terms of molar mass and you got your answer. Please gimme brainliest if this helped bc it took 15 minutes to type out. Hope this helped you! :D

Density is an intensive property as it does not depend on the quantity of the substances Whereas mass and volume are extensive property. The order of density is carbon dioxide>Neon >argon>carbon-12> hydrogen.

Density tells about the compactness of the substances, how much dense is the substances in other words. Object that is more denser than water they just sink in the water.

Mathematically,

Density of gas  = Molar Mass of the gas  ÷volume occupied by the given gases

Density is directly proportional to molar mass of the gases.

Molar mass of argon = 18g/mole

Molar mass of Neon = 20g/mole

Molar mass of carbon dioxide=44.01 g/mol

Molar mass of hydrogen=1g/mol

Molar mass of carbon-12=12g/mol

The order of gases from most dense to least dense at a given temperature and pressure is carbon dioxide>Neon >argon>carbon-12> hydrogen.

Therefore, the order of density is  carbon dioxide>Neon >argon>carbon-12> hydrogen.

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The new temperature of the gas is 115 °C

From the question given above, the following data were obtained:

The new temperature of gas can be obtained as follow:

[tex] \frac{P_1}{T_1} = \frac{P_2}{T_2} \\ \\ \frac{0.96}{298} = \frac{1.25}{T_2} \\ \\ cross \: multiply \\ \\ T_2 \times 0.96 = 298 \times 1.25 \\ \\ divide \: both \: side \: by \: 0.96 \\ \\T_2 = \frac{298 \times 1.25 }{0.96} \\ \\ T_2 = 388 \: K \\ \\ subtract \: 273 \: from \: 388 \: to \: express \: the \: answer \: im \: \degree \: C \\ \\ T_2 = 388 - 273 \\ \\ T_2 = 115 \: \degree \: C [/tex]

Therefore, the new temperature is 115 °C

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The material that absorbs the heat of the system is water owing to its high specific heat capacity.

The specific heat capacity of a substance refers to the amount of heat that is capable of increasing the temperature of 1 Kg of a body by 1 K. The higher the specific heat capacity, the more the amount of heat that the body can absorb without temperature change.

The material that absorbs the heat of the system is water because water has a higher specific heat capacity than all the other materials present.

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The material which is part of the system that absorbed heat is; The water.

Discussion:

According to the question;

In essence, the heat liberated from the system must have been absorbed by the water so that the outside of the container after mixing becomes cold.

This is so because water has a high specific heat capacity.

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Explanation:

Although all puppies are officially considered adult dogs once they reach one year old, puppies continue to grow in height and size while their bones are still developing, which takes anywhere from 6 to 24 months. Their skeletal growth is what determines how tall they will become as adults.

Answer:

well what above wave?? do you have a picture

Explanation:

The number of moles of a solute per liter of solution is measured using the unit of concentration known as molarity.

Thus, The approach for resolving molarity issues is quite straightforward. This describes an easy way to figure out how molarity of a solution.

Remembering the units of molarity (M): moles per liter, is the key to calculating molarity. Calculate how many moles of the solute are dissolved in a solution's liter volume to determine its molarity.

The molarity of a solution made by combining 23.7 grams of KMnO4 with 750 mL's worth of water. You must first determine the amount of moles of the solute because this example lacks the liters or moles required to determine molarity.

Thus, The number of moles of a solute per liter of solution is measured using the unit of concentration known as molarity.

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Answer: B. The actual mechanical advantage of the ramp.

Explanation:

The professor saying that the ramp SHOULD have a mechanical advantage of 3 indicates that that would be the ideal mechanical advantage. Since Rubia calculated it to be 2.8, that means that it is the acutal mechanical advantage. The actual advantage will be reduced from the ieal due to things like friction.

Answer:

I hope this will help

Explanation:

Copper is purified by electrolysis . Electricity is passed through solutions containing copper compounds, such as copper(II) sulfate. The anode (positive electrode ) is made from impure copper and the cathode (negative electrode) is made from pure copper.

An element symbol is a one- or two-letter abbreviation for a chemical element name. When a symbol consists of two letters, the first letter is always capitalized, while the second letter is lowercase. Element symbols also can refer to alchemy symbols for the elements or to the symbols used to describe isotopes.

Study hard!

Answer:

they are in group II and they have two electrons in their outermost energy levels ( valency)...is this helpful?

Answer:

Metallic structure

Explanation:

They have a high melting point due to the strong forces of attraction between the positive ions (cations) and the delocalised electrons. Moreover, they conduct electricity due to the sea of delocalised electrons.

[Extra: It could be an ionic compound since they also have a high melting point, however they only conduct electricity in liquid or aqeouus state.]

Answer:

I believe it would be a solution I could be wrong tho

Explanation:

Answer:

a solution

Homogeneous mixtures (solutions)

Explanation:

Lemonade is a special type of mixture called a solution.

...................................................................................................................................................

What type of mixture is made by thoroughly mixing powdered lemonade with water?

Homogeneous mixtures (solutions)

Mixtures with substances dissolved evenly into one another, like pink lemonade powder dissolved in water, are called homogeneous mixtures, or solutions.

Answer: all mass takes up space. everything has mass. Theres a unit of mass called a slug thats not the bug!

Explanation:

Answer:

4.816x10²⁴atoms

Explanation:

the number of moles of oxygen is 8

let x be number of oxygen atoms

recall that 1 mole=6.02x10^23 atoms

therefore, 8 moles =x

cross multiply

8 x 6.02 x 10^23 = x

x = 4.816 x 10²⁴atoms

Answer:

Sodium is placed in group 1 of the periodic table of Alkali metals, and has a valence shell with one electron, making them very reactive. When placed in water, it disperses heat and begins to ignite and burn (due to its very reactive nature), resulting compound is hydrogen gas (H2), and a very strong base (Sodium Hydroxide, NaOH) used for cleaning appliances and for neutralizing agents.

Silver is placed on the transitional metal section of the periodic table, not quite reactive but is the most conductible element on the planet, is malleable and ductile. Due to it being costly and its rarity, it's not relied on for computer parts or wires. Silver doesn't actually directly react with water in its liquid state. It does produce hydrogen gas and Silver Oxide when reacting with water vapour.

In short, Sodium and water create new products, while Silver and water (only in water's gaseous form) form different products.

Answer:

When the drill hits oil, some of the oil rises from the ground high into the air. This immediate release of oil is known as a "gusher." Once a reservoir has been located, pumps are used to extract the oil.

What is freshly pumped oil called?

petroleum

Explanation:

Answer:

because of the location of the 6 the answer is 6 cent

Answer:

Hundredths

Explanation:

$6 times 1/$100. The 0 is tenths, the 6 is hundredths and the 1 is thousandths.