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bagirrra123 [75]
3 years ago
10

_________ is the movement of materials across a cell membrane using cellular energy.

Chemistry
1 answer:
Airida [17]3 years ago
4 0

Answer:

active transport

Explanation:

passive transport does not involve energy

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A sample of citric acid, C6H8O7, has a mass of 22.9 g. What amount, in moles, does this mass represent?
aliina [53]

Answer

C6H807 = 192.124 g/mol

n = m/M

    \frac{22.9g}{192.124 g/mol}

n = 0.119 mol

Explanation:

to calculate amount in moles you need to find the molar mass of citric acid then divide the mass of the acid with the molar mass

3 0
3 years ago
which molecules show an appropriate number of bonds around each carbon atom? select the three that apply.
iren2701 [21]

The appropriate number of bonds around each carbon atom are four covalent bonds

Please note that carbon has four valence electrons in its outermost shell

<h3>What is an element?</h3>

An element is a substance which cannot be split into simpler forms by an ordinary chemical process. This simply goes to say that elements are substances which cannot be decomposed into simpler substances by ordinary chemical reactions.

An atom is the smallest unit or part of an element which can take part in a chemical reaction.

On a general note, elements are classified as thus:

  • Metals, non-metal, and metalloid.

  • The extreme left side elements in the periodic table are metals, for example, aluminum, sodium, calcium, caesium, etc.

  • However, elements on the right side are generally referred to as non-metals, carbon, chlorine, oxygen,

So therefore, the appropriate number of bonds around each carbon atom are four covalent bonds

Complete question:

What is the appropriate number of bonds around each carbon atom?

Learn more about atoms and elements:

brainly.com/question/6258301

#SPJ1

5 0
2 years ago
Five beans have a mass of 2.1 g. How many beans are in 0.454 kg go beans?
Svetach [21]
<span>1080.9523809 should be the answer</span>
4 0
3 years ago
For an endothermic reaction, how will the value for Keq change when the temperature is increased?
Nataly [62]
I put the answer <em>C: Keq will increase</em>, on PLATO. Hope this works for you!
4 0
3 years ago
Read 2 more answers
Question 12 of 32
Sidana [21]

Answer:

A. Antoine-Laurent Lavoisier

Explanation:

Hope this helped!

8 0
3 years ago
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