Please help me fast, i don't understand it.

Answer and Explanation:

I hope this answer and explanation is easy to follow. Let me know if I can be of further assistance.

Answer:

This question is incomplete

Explanation:

This question is incomplete. However, the period of the periodic table are the horizontal (left to right) rows in the periodic table. Elements in the same period have the same number of electron shells. There are seven periods in the periodic table.

The periodic table of elements is the table that contains all chemical elements arranged according to there atomic number. Atomic number is the number of protons present in the nucleus of an atom.

Answer:

yellow vetch

Explanation:

Answer:

The elixir of life, also known as elixir of immortality and sometimes equated with the name philosopher's stone, is a potion that supposedly grants the drinker eternal life and/or eternal youth. This elixir was also said to cure all diseases.

Answer: the answer is not the glycerol molecule in fats contains a carboxyl group

The given molecule is nonpolar and hydrophobic because there is an unequal distribution of hydrogen and oxygen atoms. Thus, the correct option for this question is D.

A Hydrophobic molecule may be defined as a type of molecule that is interestingly repelled from a mass of water. It is typically not soluble in water. These molecules are always repelled away from water contact.

When there is an equal distribution of hydrogen and oxygen atoms delivered, the constructed molecule is polar and hydrophilic in nature. This is because the partial positive charge on the hydrogen atom attracts the partial negative charge of oxygen and makes the molecule attracted to the water.

Therefore, there is an unequal distribution of hydrogen and oxygen atoms is a statement that is responsible for a molecule to be nonpolar and hydrophobic. Thus, the correct option for this question is D.

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Answer:

Study Island:

The answer is...

C.  The test variable (independent variable) and outcome variable (dependent variable) have no affect on each other.

Explanation:

The test variable (independent variable) and the outcome variable (dependent variable) have no effect on each other. Hence, option C is correct.

The independent variable can be altered, manipulated and changed in an experimental study.

Researchers often measure independent and dependent variables in studies to test cause-and-effect relationships.

The independent variable is the reason or cause. Its value is independent of other variables.

The dependent variable is the outcome whose values depend on changes in the independent variable.

Hence, option C is correct.

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Answer:

Their calculation was way too off to the actual one.

Explanation:

Answer:

They need a density calculation so they can get the right vaule. Their calculation was way off compare to the acutal vuale.

Explanation:

Answer:

Explanation:

The answer isssssssss ddddddd

Answer:

b      thermodynamics

Explanation:

Answer:

ITS A. (Give me brainliest!!)

When a glass or a watermelon is moved, the volume stays the same as they are in a fixed shape and the volume of a solid state. Option A correct.

A solid-state is a state of matter in which the molecules of matter are closely packed with each other with the maximum molecular force of attraction for a fixed shape.

Glass and watermelon are fixed in shape as they are made before and volume is also fixed and the molecules are fixed in definite shape and the volume cannot be changed.

Therefore, Option A correct. When a glass or a watermelon is moved, the volume stays the same as they are in a fixed shape and the volume of a solid state.

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name= calcium

atomic mass= 40.078 atomic mass unit

no of protons= 20

no of electrons=20

Answer:

There's 34,000,000,000 nanograms in 34g.

Explanation:

U can write it like 3.4e+10.

Hope I helped ya.

< Sarah >

Explanation:

Molar mass of cyclohexanol : 100.158 g/mol

Answer:

Explanation:

The density of a substance can be found by using the formula

[tex]Density = \frac{mass}{volume} [/tex]

From the question

mass = 6.356 g

volume = 2.56 cm³

Substitute the values into the above formula and solve.

That's

[tex]Density = \frac{6.356}{2.56} \\ = 2.4828125[/tex]

We have the final answer as

Density = 2.48 g/cm³

Hope this helps you

D, 67

Explanation:

1070 miles/16 hours = 66.875 miles per hour average traveling speed, which rounds up to 67.

Answer:

4.11x10⁶Joules

10.04Cal

Explanation:

Calories and joules are units of energy used in several fields of science.

4184Joules are equal to 1 Cal.

In joules, 982 calories are:

982 Calories * (4184 J / 1 Cal) =

In the same way, 4.2x10⁴ Joules are:

4.2x10⁴J * ( 1Cal / 4184J) =

Answer:

72.22 g

Explanation:

975 mL Mercury× 13.5 g/mL = 72.22 g

Answer:

10

Explanation:

10 pies because 60 divided by 6 is 10.

Answer:

to see if something or someone has either a low or high temperature

Explanation:

because you wanna know if some has a fever so you dont get the coronna virus

Answer:

My answer to the question is 0.00000051

Answer:

0.00000051

Explanation:

Answer:

Reduction of carbonyl compounds.

Hydrolysis of Alkyl Halides.

Answer:

0.24%

Explanation:

The following data were obtained from the question:

Measured value = 42.1 g

Actual value = 42 g

Percentage error =?

Percentage error can be obtained by using the following formula:

Percentage error = |Measured value – Actual value | / Actual value × 100

With the above formula, we can obtain the percentage error as follow:

Measured value = 42.1 g

Actual value = 42 g

Percentage error =?

Percentage error = |42.1 – 42| / 42 × 100

Percentage error = 0.1/42 × 100

Percentage error = 10/42

Percentage error = 0.24%

Therefore, the percentage error is 0.24%

Answer:

C) Carla participated in an artistic activity, while Maurice participated in a scientific activity.

Explanation:

Scientific activities involve making observations, which ultimately leads to the series of steps that aims at solving the observed problem or answering a question that arises from the problem. This is the case of Maurice who is observing and recording information about ants in order to solve a curiosity (about what they feed on).

However, on the other hand, Carla is given a pictorial representation of the ants and what they carry. It is not based on curiosity or to answer a question about the ants but rather for decoration or aesthetic purposes, which is what makes her activity artistic.

Answer:

[See Below]

Explanation:

✦ A beaker of liquid would measure the volume of a liquid.

✦ A graduated cylinder is good for estimating the volume of a liquid.

✦ You'd most likely use a tape measure to measure the wall length and width.

~Hope this helps Mate. If you need anything feel free to message me.

Answer:

2 significant figures.

Explanation:

Significant Figures Rules:

1. Anything that isn't a zero is a sig fig

2. If a decimal point comes after the ones digit, everything before the decimal is counted as sig fig (i.e 2000. would be 4 sig figs).

3. If we are dealing with small decimals, the zero before and after the decimal (i.e 0.002) is a placeholder and is not counted as sig figs.

4. Any zeros between 2 significant digits is considered in sig figs (i.e 2002 would be 4 sig figs)

Since we are dealing with 87000, we see that we have no decimal point. That means our only sig figs are 8 and 7, which equals 2 sig figs.

Answer:

See explanation

Explanation:

A salt is made up of homogeneous particles while sand is made up of heterogeneous particles. Salt is a crystalline substance while sand is a coarse substance.

If salt and sand are mixed with water, salt forms a solution with water, hence, salt cannot be caught on filter paper. However, sand does not form any chemical specie with water hence it is caught on the filter paper as a solid.

Answer:

The most correct option here is D

Explanation:

The difference between a solid (ice) and a liquid (water)/gas (steam) is that the particles in a solid is tightly packed (and do not move) as against the particles in liquid which moves quite freely or those in gases that move very freely.

When a solid (for example ice) is subjected to heat, it's particles receives the heat energy, hence have a higher temperature, and starts moving from its compact position which turns the solid into liquid. This was what happened to the ice in Cynthia's iced tea. The ice got/absorbed an increased temperature from the surrounding tea and it's particles began to move (more freely) thereby causing the ice to melt.

Answer:

D

Explanation:

Answer:

CaCO3------->CaO + CO2

Heat