What is this answer to this problem

Answer:

D. 25 grams

Explanation:

I think that's what the answer is

Answer:

Answer

The limitations are-

1. Privacy of the individuals involved in the research process.

2. Physical and psychological risks should be minimized

3. The subjects should be chosen equitably

4. Only reasonable exposure to risks is admissible.

Explanation

The privacy of the individuals involved in the research must be taken into consideration. This will ensure safety of patient data and information. The risk of physical and physiological well being of the person must be taken into consideration in such a research. In addition to that, the subject must be made to understand every procedure and the risks involved before testing. Moreover, only minimal exposure to risks is allowed and must have been previously tested in animals to avoid deaths.

Explanation:

Please send me the answer of this question

Answer:

iuiwusiwuiqihihiuwusbhwubduywbduywbudb me no esspanlo

Explanation:

niuniniuniuniun

Answer:

A.3+

Explanation:

️️️️️️️️️️️️️️

Answer:

falso

Explanation:

Answer:

Explanation:

The biggest change in the body caused by regular exercise is to muscle tissue. ... At the cellular level, exercise triggers the release of substances that dilate the blood vessels in the muscle, letting in more oxygen, says Prof Bradford. These are short-term effects, but deeper changes come with regular exercise.

Exercising causes changes in our body because we're working our muscles so there's more going on with us compared to when we're just laying down. We need more oxygen to go to our muscles so we breathe harder and more rapidly. Our heart also beats faster because it needs to pump more blood to the muscles that are being worked.

Answer:

0.123 mol

Explanation:

1 mol Na/22.99g na=0.123 mol

Answer:

[tex]\boxed {\boxed {\sf 0.261 \ mol \ B}}[/tex]

Explanation:

We are asked to find the number of moles in a sample of 2.82 grams of boron.

We convert grams to moles using the molar mass or the mass of 1 mole of a substance. These values are found on the Periodic Table. They are equivalent to the atomic masses, but the units are grams per mole instead of atomic mass units.

Look up the molar mass of boron (B).

Convert using dimensional analysis. Set up a conversion factor using the molar mass.

[tex]\frac {10.81 \ g \ B}{ 1 \ mol \ B}[/tex]

We are converting 2.82 grams of boron to moles, so we multiply by this value.

[tex]2.82 \ g \ B *\frac {10.81 \ g \ B}{ 1 \ mol \ B}[/tex]

Flip the ratio so the units of grams of boron cancel.

[tex]2.82 \ g \ B *\frac { 1 \ mol \ B}{10.81 \ g \ B}[/tex]

[tex]2.82*\frac { 1 \ mol \ B}{10.81}[/tex]

[tex]\frac {2.82}{10.81} \ mol \ B[/tex]

[tex]0.2608695652 \ mol \ B[/tex]

The original value of grams has 3 significant figures, so our answer must have the same. For the number we found, this is the thousandth place. The 8 in the ten-thousandth place tells us to round the 0 up to a 1.

[tex]0.261 \ mol \ B[/tex]

There are approximately 0.261 moles of boron (B)in 2.82 grams of boron.

Answer:

Explanation:

1.c

2.j

3.h

4.b

5.f

6.d

7.a

8.i

9.e

10.g

From the graph shown, Y2 = N2, X2 = O2, Z2 = H2.

When atoms of elements are at a large distance from each other, the potential energy of the system is high. However, as the atoms approach each other, the potential energy of the system decreases steadily. The closer the atoms come to each other, the lower the potential energy. This implies that potential energy is proportional to bond length.

Since N2 has a shorter bond length and higher energy, Y2 must be N2. The bond energy of hydrogen is small hence H2 must be X2. The bond energy of a double bond is intermediate between that of a single and triple bond hence Z2 must be O2.

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Answer: The first one has the most kinetic energy. Why? traveling with the slowest speed comes with the faster stop withholding more energy in the stone

Explanation:

Answer:

25

Explanation: They all add up to 25 Atoms

The atomic number of nitrogen is 7 and that of oxygen is 8. Atomic number of hydrogen is one and the atomic number of sulphur is 16. Then, the sum of  atomic numbers of each element present in the reactants of the given formula is 32.

The atomic number of an atom is the number of electrons in its neutral state. This number is equal to the number of protons also. The modern periodic table classify all elements based on their atomic numbers.

The sum of number of protons and neutrons of an element is called its mass number. For the given formula, the elements present are H, O, N and S.

atomic number of H = 1

atomic numebr of N = 7

atomic number of O =8

atomic number of S = 16.

Then ,sum of atomic number s= 1 + 7 + 8 + 16 = 32.

Therefore, the sum of the atomic numbers of each element present in the reactants of the given formula is 32.

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Answer:

The first one is air the second is decreases the third is water the fourth is gas and the last is liquid.

Explanation:

Hope it helps.

Answer:

ttyhjj

Explanation:

It will take 56 days to go from 100% iodine-131 to less than 1% iodine-131.

From the table, we can see that the half life of iodine-131 is 8 days. We can see that it takes 8 days to have 50% of iodine-131

After 16 days, we will have 25 % of iodine-131

After 24 days, we will have 12.5 % of iodine-131

After 32 days, we will have 6.25% of  iodine-131

After 40 days, we will have 3.125% of  iodine-131

After 48 days, we will have 1.5625% of iodine-131

After 56 days, we will have 0.78125% of iodine-131

After 56 days, the percentage of iodine-131 drops to less than 1%.

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Answer:

cannot be broken down further

Answer:

what queastiion

Explanation:

Answer:

what is the question

Explanation:

...

Answer:

minerals

Explanation:

Hope this helps

Answer:

Incomplete combustion produces carbon monoxide along with some carbon dioxide.  Water is always produced during combustion.  If the fuel is sulfur containing, carbon disulfide will result as well.

Have a happy day! <3Miss Hawaii

Explanation:

A 1.85 M acetone solution (MM = 58.08 g/mol) with a density of 0.971 g/mL has a mass percent of acetone of 11.0%.

It refers to the mass of solute in 100 grams of solution.

Let's suppose we have 1 L of the solution.

We have a 1.85 M solution of acetone (MM = 58.08 g/mol). We will calculate the mass of acetone using the following expression for molarity.

M = mass acetone / MM acetone × liters solution

mass acetone = M × MM acetone × liters solution

mass acetone = 1.85 mol/L × 58.08 g/mol × 1 L = 107 g

We have 1 L (1000 mL) of the solution with a density of 0.971 g/mL.

1000 mL × 0.971 g/mL = 971 g

%acetone = (107 g/971 g) × 100% = 11.0 %

A 1.85 M acetone solution (MM = 58.08 g/mol) with a density of 0.971 g/mL has a mass percent of acetone of 11.0%.

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Answer:

The answer is B(the path water takes from Earth to the clouds and back again)

Explanation:

9) a) (9.84×10³)/(6.12×4.27×10³+⁷) = 9.84×10³/6.12×4.27×10¹⁰ = 9.84×10³-¹⁰/6.12×4.27

= 0.376×10^-7.

b) (4.36×10⁸×1.82×10³)/(0.0856×4.7×10⁶)

= (7.9352×10⁸+³)/(0.40232×10⁶)

= 19.72×10⁸+³-⁶ = 19.72×10⁵

hope this helps you.

Answer:

1. Uniform, non visible

2. Visible, non uniform

3. Uniform, non visible

4. Visible, non uniform

5. Visible, non uniform

Explanation:

A heterogeneous mixture is simply any mixture that is not uniform in composition — it's a non-uniform mixture of smaller constituent parts. By contrast, a mixture that is uniform in composition is a homogenous mixture

visible state of matter is when you can easily difference two components of a mixture

non visible is when the state of the matter in the substance is not visible to the eye, it can't be differentiated

The characteristic of reactions that depends on valence electrons is the bond type.

In chemistry, a chemical bond could be;

The type of bond formed depends on the number of valence electrons present. When there are few valence electrons on an atom, it mostly forms ionic bonds.

When there are more electrons on an atoms, it mostly forms covalent bonds and the electrons between the atoms are shared.

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Answer:

D: bond number

Answer:

Aluminium sulphate is an inorganic compound.

Answer:

vinegar and soda

Explanation:

Mixing baking soda (sodium bicarbonate) and vinegar (acetic acid) causes a chemical reaction that produces a salt (sodium acetate) and water, as well as carbon dioxide gas.

Answer:

Fertilizer and vinegar

Explanation:

Fertilizer is a base, and vinegar is an acid. Salt is made when you combine a base and an acid. Plus, I got a 100% on the test and this was my answer.

Answer:

Learning Task 3. Solving word problems involving multiplication of deci-

the

A cstep in solving word problems. Do these in your notebook. ),

1. A clerk is paid P 45.25 per hour for 40 hours a week, 1.50 times the

regular rate for overtime and double the rate for a holiday. How much

holiday?

2. fofkmputer programmer earns a regular hourly rate of P50.00. If he

worked 42.75 hours in a week, how much did he earn?

3. Arthur earns P1350.00 a day. He sets aside 0.10 of this for savings.

How much does he save in a month?

4. Mr. Fernandez has a monthly pay of P 5,450. The tax deducted from

year?

5. Dianne works 2.5 hours a day from Monday to Friday and 3.75 hours

his a

on Saturday. If he is paid P25.00 per hour, how much does he earn in

a

week?

Explanation:

Learning Task 3. Solving word problems involving multiplication of deci-

the

A cstep in solving word problems. Do these in your notebook. ),

1. A clerk is paid P 45.25 per hour for 40 hours a week, 1.50 times the

regular rate for overtime and double the rate for a holiday. How much

holiday?

2. fofkmputer programmer earns a regular hourly rate of P50.00. If he

worked 42.75 hours in a week, how much did he earn?

3. Arthur earns P1350.00 a day. He sets aside 0.10 of this for savings.

How much does he save in a month?

4. Mr. Fernandez has a monthly pay of P 5,450. The tax deducted from

year?

5. Dianne works 2.5 hours a day from Monday to Friday and 3.75 hours

his a

on Saturday. If he is paid P25.00 per hour, how much does he earn in

a

week?

Answer:

4.56 X 10^ -4 g/mL

Explanation:

A solution is  prepared by diluting 6.0 mL of a 7.6 x 10-4 g/mL solution to a total volume of 10.0 mL. Calculate the concentration of the dilute solution.

(7.6 X10^-4  gm/m L) x( 6.0 m L ) = 45.6 X 10^-4 g

this is dissolved )in 10 m L=45.6 X 10^-4  g/ 10

4.56 X 10^ -4 g/mL

check

6/10 =0.6

4.56/7.6 = o.,6