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Cerrena [4.2K]
3 years ago
5

A catalyst:

Chemistry
2 answers:
svetlana [45]3 years ago
4 0

Answer:

Catalyst decreases activation energy

Explanation:

Consider the attached diagram and note the annotation => top of transition diagram for catalyzed reaction is lower than uncatalyzed reaction.

posledela3 years ago
3 0

Answer:

D

Explanation:

well, just need to remember

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Look at the element in group 12, period 4. Hover your mouse over the element to see more about it. Then fill in the following in
Svetlanka [38]

Answer:

name:  zinc

symbol:  Zn

atomic number:  30

number of protons:  30

atomic weight:  65.38  atomic mass units

I hope this helps!

4 0
3 years ago
Find the sum of angles x° and y° from the given figure​
tresset_1 [31]

Answer:

where is the figure . u can simply add them

6 0
3 years ago
1. How many ATOMS of boron are present in 2.20 moles of boron trifluoride ? atoms of boron.
maks197457 [2]

Answer:

1. How many ATOMS of boron are present in 2.20 moles of boron trifluoride? atoms of boron.

2. How many MOLES of fluorine are present in  of boron trifluoride? moles of fluorine.​

Explanation:

The molecular formula of boron trifluoride is BF_3.

So, one mole of boron trifluoride has one mole of boron atoms.

1. The number of boron atoms in 2.20 moles of boron trifluoride is 2.20 moles.

The number of atoms in 2.20 moles of boron is:

One mole of boron has ---- 6.023x10^2^3 atoms.

Then, 2.20 moles of boron has

-=2.20 mol. x 6.023 x 10^2^3 atoms /1 mol\\=13.25x10^2^3 atoms

2. Calculate the number of moles of BF3 in 5.35*1022 molecules.

(5.35x10^2^2 molecules/6.023x10^2^3)x 1mol\\=0.0888mol

One mole of boron trifluoride has three moles of fluorine atoms.

Hence, 0.0888moles of BF3 has 3x0.0888mol of fluorine atoms.

=0.266mol of fluorine atoms.

5 0
2 years ago
Describe three findings of the Human Genome Project<br> Write it in your own words
nata0808 [166]

Answer:

The biggest known human gene, is made up of about 2.4 million bases. The Human Genome Project also gave us more detailed information about chromosomes. It turns out that chromosome 1 contains the most genes, while the Y chromosome has the fewest.

Explanation:

3 0
3 years ago
What is the density of an object having a mass of 4.0 g and a volume of 30 mL?
RUDIKE [14]

Answer:

8.324 Hope this helps! =)

3 0
2 years ago
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