Please help me please i will mark you brainliest. In the nucleus of an atom, there are 17 protons and 18 neutrons. What is the atomic number? What is the atomic mass? How many electrons are there? Be sure to answer all 3 questions.

Answer:

I can say that knowledge of separating mixtures can help us in daily life and within society in the following ways:

1. Purification of water: Separation techniques are used to purify water for drinking and industrial purposes. It is essential to remove impurities from water to prevent diseases.

2. Recycling: Separation techniques are used to separate materials for recycling. This helps reduce the amount of waste in landfills and helps conserve resources.

3. Food industry: Separation techniques are used in the food industry to separate unwanted particles from food products. This helps ensure that the food we eat is safe and free from contaminants.

4. Medicine: Separation techniques are used in the pharmaceutical industry to separate and purify chemicals for use in medicine. This helps ensure that medicines are safe and effective.

5. Environmental protection: Separation techniques are used to remove pollutants from the environment. This helps protect our natural resources and prevent pollution-related health problems.

6. Oil and gas industry: Separation techniques are used to separate crude oil and natural gas into their various components. This helps in the production of energy and other useful products.

In summary, knowledge of separating mixtures is essential in our daily lives and within society. It helps ensure that we have access to safe and clean water, food, medicine, and energy, and also helps protect the environment.

Explanation:

Yes, because green eye alleles are more common than blue eye alleles; therefore, a parent with blue eyes can only have two blue eye alleles.

The term "allele" is used to refer to a gene's alternate form or variants. For each autosomal gene, one allele is inherited from each parent, and we often group the alleles into categories. Usually, we refer to them as normal, wild-type, aberrant, or mutant alleles.

A gene's changeable form is called an allele. There are some genes that come in different forms yet all have the same genomic location on a chromosome. Humans are considered diploid organisms because each genetic locus in them has two alleles, one from each parent..

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Answer:

0.3+Na

Explanation:

Explanation:

hope it is helpful to you

as air particles have a very large intermolecular spaces and as the intermolecular force of attraction in between its particles is much weaker and that's why the particles are always in random movements due to they possess a high kinetic energy as the intermolecular space is large in between each air molecules that is why air can easily blow from one place to another

the pressure required for 1.35 g of oxygen to dissolve in 1.5 L of water is 3.56 atm.

The first step in solving this problem is to identify the relevant equation.

Henry's law is the formula that relates the pressure of a gas above a liquid to the concentration of the gas that dissolves in the liquid.

In mathematical terms, Henry's law can be expressed as follows:P = kH * Cwhere P is the pressure of the gas, kH is Henry's law constant, and C is the concentration of the gas in the liquid.

To solve the problem, we need to first determine the value of kH using the given data.

kH can be calculated using the following formula:kH = P / CSubstituting the values given in the problem into this formula, we get:kH = 1.65 atm / (0.654 g / 1.5 L) = 3.97 atm/(g/L).

Now that we have the value of kH, we can use Henry's law to calculate the pressure required for 1.35 g of oxygen to dissolve in 1.5 L of water.

To do this, we simply rearrange the formula to solve for P:P = kH * CSubstituting the values of kH and C into this formula, we get:P = 3.97 atm/(g/L) * (1.35 g / 1.5 L) = 3.56 atm

Therefore, the pressure required for 1.35 g of oxygen to dissolve in 1.5 L of water is 3.56 atm.

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The pOH of the 0.001 M NaOH solution is approximately 3.

To determine the pOH of a solution, we need to know the concentration of hydroxide ions (OH-) in the solution.

In the case of a 0.001 M NaOH solution, we can assume that all of the NaOH dissociates completely in water to form Na+ and OH- ions. Therefore, the concentration of hydroxide ions in the solution is also 0.001 M.

The pOH is calculated using the equation:

pOH = -log[OH-]

Substituting the concentration of hydroxide ions, we have:

pOH = -log(0.001)

Using a calculator, we can evaluate the logarithm:

pOH ≈ 3

Therefore, the pOH of the 0.001 M NaOH solution is approximately 3.

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Answer:

An element X reacts with oxygen to form XO

and with chlorine to form XCl

. XO

is a white solid that melts at high temperatures (above 1000 degrees C). Under usual conditions, XCl

is a colorless liquid with a boiling point of 58 degrees C.

Explanation:

Answer:

Your body temperature would decrease

Explanation:

Answer:

Li>Na>K>Rb

Explanation:

Answer:

c. Li > Na > K > Rb

Explanation:

edge 2021

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It would take 22g of sodium hydroxide (NaOH) to make 16g of the antacid milk of magnesia (magnesium hydroxide).

In the field of chemistry known as stoichiometry, desired quantitative data is ascertained by using relationships between the reactants and/or products of a chemical reaction. Stoichiometry literally translates as the measure of elements because the Greek words stoikhein and metron both mean element and measure, respectively.

In a chemical reaction, the total mass of reactant and product are equal, according to the statement, and neither is generated nor destroyed. This is the stoichiometric law, and also the law of conservation of mass.

\(16 \mathrm{~g} \text { of } \mathrm{Mg}(\mathrm{OH})_2 \times \frac{1 \mathrm{molMg}(\mathrm{OH})_2}{58.3 g \mathrm{gg}(\mathrm{OH})_2} \times \frac{2 \mathrm{~mol} \mathrm{NaOH}}{1 \mathrm{molMg}(\mathrm{OH})_2} \times \frac{40 \mathrm{gNaOH}}{\mathrm{molNaOH}}=22 \mathrm{~g}\)

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The balanced oxidation-reduction equation for the destruction of cyanate ion waste solution from gold-mining operations by treatment with hypochlorite ion in basic solution is:

OCN⁻(aq) + OCl⁻(aq) + 2OH⁻(aq) → CO₂⁻(aq) + N₂(g) + Cl⁻(aq) + H₂O(l)

In this reaction, the cyanate ion (OCN⁻) is oxidized to carbon dioxide (CO₂⁻) and nitrogen gas (N₂), while the hypochlorite ion (OCl⁻) is reduced to chloride ion (Cl⁻). The reaction takes place in basic solution, which provides the hydroxide ions (OH⁻) needed to neutralize the acidic H⁺ ions produced during the oxidation of the cyanate ion.

The reaction is exothermic, releasing heat energy as the products form. This reaction is an effective way to dispose of the cyanate ion waste generated by gold-mining operations, as it converts the hazardous waste into harmless gases and ions.

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Answer - B Atoms in the original substances are arranged in a different way to make new substances

The arrow in a chemical equation represents the direction of the reaction. It indicates the conversion of reactants into products. The arrow points from the reactant side to the product side, symbolizing the flow of the reaction.

The purpose of the arrow is to visually represent the chemical transformation occurring in the reaction. It shows the relationship between the reactants and products and the direction in which the reaction proceeds. The arrow implies that the reactant molecules are being rearranged and transformed into new substances with different properties.

Chemical equations are used to describe the stoichiometry and balance of reactions. The arrow helps convey this information by illustrating the overall process taking place. It serves as a crucial element in understanding the reaction's composition, reaction conditions, and the substances involved.

Furthermore, the arrow also implies that the reaction can occur in both directions. In reversible reactions, the arrow can be represented as a double-headed arrow, indicating that the reaction can proceed in either direction depending on the conditions.

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Answer: 0.056

Explanation:

The molarity of the solution is the ratio of the number moles of solute to the volume of solution. Hence, the molarity of the given solution is 0.056 M. Thus, option D is correct.

Molarity is a common term used to express the concentration of a solution . It is the ratio of the number of moles of solute to the volume of solution in liters.

Given that,

volume of HCl solution  = 9 L

no. of moles of HCl = 0.50 moles.

Then,

molarity = no.of moles/volume in L

M = 0.50 Moles/9 L

   = 0.056 M.

Therefore, the molarity of the solution is 0.056 M.

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To determine the concentration of H2SO4, we can use the concept of molarity (M) and the equation:

M1V1 = M2V2

where:

M1 = concentration of NaOH (in this case, 1.90 M)

V1 = volume of NaOH used (in this case, 38.70 cm^3)

M2 = concentration of H2SO4 (what we're trying to find)

V2 = volume of H2SO4 used (in this case, 10.30 cm^3)

Rearranging the equation, we have:

M2 = (M1 * V1) / V2

Substituting the given values:

M2 = (1.90 M * 38.70 cm^3) / 10.30 cm^3

M2 ≈ 7.12 M

Therefore, the concentration of H2SO4 is approximately 7.12 M.

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Therefore, we need 6.0 × 1022 atoms of carbon to reach 12 g on the lab balance.

Carbon is an element found in nature that is essential for life on Earth. It is an abundant, non-metallic, and highly versatile element that is used in a variety of ways in many different fields. Carbon is found in all living organisms and is the basis of all life on Earth. It is also found in rocks, soil, and the atmosphere. Carbon is the fourth most abundant element in the universe and is the basis for organic compounds that form the basis of all living things. In industry, carbon is used to produce steel, glass, plastics, and many other materials. Carbon is also used in the manufacture of fuels and is a component of the chemical processes necessary for life. Carbon is also used in batteries, semiconductors, and solar cells.

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Some tips to follow when doing lab practical are:

From the table, Column 1 represents the time in half-life cycles, ranging from the initial state to 8 cycles. Column 2 shows the predicted number of radioactive atoms at each time point, based on the assumption that the number of atoms reduces by half in each half-life cycle.

Column 3 represents the simulated number of radioactive atoms at each time point and corresponds to the predicted values of the simulation.

In conclusion, the results as outlined in the lab guide are A=  27 B=  16 C=  9 D=  4 E=  2 F=  2 G=  0 H= 0.

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#complete question:

Do step 3 as outlined in the lab guide. Record your results in the appropriate blanks. A = B = C = D = E = F = G = H = A 3-column table with 9 rows. Column 1 is labeled Time half-life cycles, n with entries Initial, 1, 2, 3, 4, 5, 6, 7, 8. Column 2 is labeled Predicted radioactive atoms with entries 100, 50, 25, 13, 6, 3, 2, 1, 0. Column 3 is labeled Simulated radioactive atoms with entries 100, A, B, C, D, E, F, G, H.

a) In 25 grams of water, the solubility is 92/4 = 23 grams, so adding 24 grams will produce a supersaturated solution.

b) In 50 grams of water, the solubility is 92/2 = 46 grams, so adding 47 grams will produce a supersaturated solution.

c) In 150 grams of water, the solubility is 92(1.5) = 138 grams, so adding 127 grams will produce an unsaturated solution.

Answer:

What are often called carbon sinks like tropical forests only store carbon temporarily. The only real carbon sinks operate by the long term ...

Explanation:

the oceans and atmosphere, and dissolved organic matter is carried in solution by rivers from soils to the sea. This all constitutes the short-term carbon cycle. The word "short-term" is used because the characteristic times for transferring carbon between reservoirs range from days to tens of thousands of years.

In the short-term reservoir, carbon is stored in the atmosphere, oceans and biosphere with the ocean containing the largest amount of carbon. It takes months to centuries to recycle carbon dioxide through the short-term reservoir.

Carbon is stored in four main reservoirs -- oceans (the largest reservoir), geological reserves of fossil fuels, the terrestrial surface (plants and soil, mainly), and the atmosphere.

Answer:

B) Pressure and Temperature

Explanation:

Just did it

Answer:

Explanation:

T

Answer:

for this one you would have to divide 19.9g by the kinetic energy 1.0 and you would get your answer.

Explanation:if you would give me brainiest that would help a lot :)

The volume of 4.2 moles of \(CH_{4}\) at 1.18 atm and 50.0°C is approximately 94.1 L.

To find the volume of the given amount of \(CH_{4}\) at a specific temperature and pressure, we can use the Ideal Gas Law equation: PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin.

First, we need to convert the temperature from Celsius to Kelvin by adding 273.15. So, T = 50.0 + 273.15 = 323.15 K.

Next, we can substitute the given values into the Ideal Gas Law equation:

(1.18 atm) V = (4.2 mol) (0.0821 L·atm/mol·K) (323.15 K)

Simplifying the equation, we get:

V = (4.2 mol) (0.0821 L·atm/mol·K) (323.15 K) / (1.18 atm)

V ≈ 94.1 L

Therefore, the volume of 4.2 moles of \(CH_{4}\) at 1.18 atm and 50.0°C is approximately 94.1 L.

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Answer:

Viruses, bacteria, fungi, and parasites.

Explanation:

hope this helps and is right :)

Answer:

4 millllllermeeters jb

A and C are the only two places that would represent the oldest rocks

Answer:

Hydrogen chloride is a mixture of hydrogen and chlorine elements. The chemical abbreviation of hydrochloric acid is HCl.

Explanation: