All categories

3 years ago

Chemical digestion would not be possible without _____, which speed up the rate of chemical reactions in your body?

Chemistry

2 answers:

Mashutka [201]3 years ago

7 0

Enzymes in our body increases the speed of chemical digestion.

Lera25 [3.4K]3 years ago

7 0

Enzymes are the catalysts in almost every chemical reaction in our body

You might be interested in

Which statement explains this observation?

sammy [17]

Answer:

should be D. Hope this helpsss!

8 0

3 years ago

Transition metal elements are in the "d block" on the periodic table, because the electron configuration of every transition met

goblinko [34]

TRUE :) ;D;D;D;D;D ;J

4 0

3 years ago

Read 2 more answers

A scientist is studying a sample of matter. The matter has no definite shape or volume, and it can conduct an electric current.

Mademuasel [1]

Answer:

Plasma

Explanation:

It is because gas and plasma have no definite shape and volume but plasma can conduct an electric charge

6 0

3 years ago

Read 2 more answers

Carbon-14 has a half-life of approximately 5700 years. How much of a 1000g sample will be left undecayed and still radioactive a

Artist 52 [7]

Answer:

option C is correct (250 g)

Explanation:

Given data:

Half life of carbon-14 = 5700 years

Total amount of sample = 1000 g

Sample left after 11,400 years = ?

Solution:

First of all we will calculate the number of half lives passes during 11,400 years.

Number of half lives = time elapsed/ half life

Number of half lives = 11,400 years/5700 years

Number of half lives = 2

Now we will calculate the amount left.

At time zero = 1000 g

At first half life = 1000 g/2 = 500 g

At second half life = 500 g/2 = 250 g

Thus, option C is correct.

4 0

3 years ago

The image shows the representation of an unknown element in the periodic table. A square is shown. Inside the square twelve is w

Ludmilka [50]

<u>Answer:</u> The correct answer is the mass number of the most common isotope of the element is 24.

<u>Explanation:</u>

We are given:

An element having atomic number 12 is magnesium and atomic mass of the element is 24.305

The image corresponding will be $_{24.305}\textrm{Mg}^{12}\\\text{Magnesium}$

The number '24.305' is the average atomic mass of magnesium element.

Average atomic mass is defined as the sum of masses of each isotope each multiplied by their natural fractional abundance.

Formula used to calculate average atomic mass follows:

$\text{Average atomic mass }=\sum_{i=1}^n\text{(Atomic mass of an isotopes)}_i\times \text{(Fractional abundance})_i$

Average atomic mass of magnesium = 24.305 amu

As, the average atomic mass of magnesium lies closer to the mass of Mg-24 isotope. This means that the relative abundance of this isotope is the highest of all the other isotopes.

The 'Mg-24' isotope is the most common isotope of the given element.

Hence, the correct answer is the mass number of the most common isotope of the element is 24.

4 0

3 years ago