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ExtremeBDS [4]
3 years ago
15

How many electrons does uranium have​

Chemistry
2 answers:
mestny [16]3 years ago
8 0

Answer:

92

Explanation:

lora16 [44]3 years ago
3 0

Answer:

92

Explanation:

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Using a ph meter, you find the ph of an unknown solution to be 8. 0. How would you describe this solution?.
insens350 [35]

Answer:

Just Barely Base/Neutral

Explanation:

a pH of 8.0 is greater than Neutral (7.0) but is still neutral due to it being more neutral than a base

4 0
2 years ago
Indicate which factors affect the rate of a reaction. select all that apply. temperature δs o keq δg o δh o ea concentration k c
melamori03 [73]
Several factors affect the rate of a chemical reaction. From the options given factors that affect the rate are:
temperature and concentration of catalysts.
As the temperature increases, also the rate of the reaction increases.
<span>The concentration of a catalysts helps a reaction to proceed more quickly to equilibrium. </span>
5 0
3 years ago
Part A When a neuron responds to a particular neurotransmitter by opening gated ion channels, the neurotransmitter is serving as
Savatey [412]

Answer:

Receptor

Explanation:

   Neurotransmitters are defined as chemical messengers that carry, stimulate and balance signals between neurons, or nerve cells and other cells in the body.

  After release, the neurotransmitter crosses the synaptic gap and binds to the receptor site on the other neuron, stimulating or inhibiting the receptor neuron depending on what the neurotransmitter is. Neurotransmitters act as a key and the receptor site acts as a block. It takes the right key to open specific locks. If the neurotransmitter is able to function at the receptor site, it will cause changes in the recipient cell.

 The "first-class" neurotransmitter receptors are ligand-activated ion channels, also known as ionotropic receptors. They undergo a change in shape when the neurotransmitter turns on, causing the channel to open. This can be an excitatory or inhibitory effect, depending on the ions that can pass through the channels and their concentrations inside and outside the cell.  Ligand-activated ion channels are large protein complexes. They have certain regions that are binding sites for neurotransmitters, as well as membrane segments to make up the channel.

6 0
3 years ago
Cesium-137 has a half life of 30.0 years. If initially there are 8.0 kg of cesium-137 present in a sample, how many kg will rema
viva [34]

Mass after 60 years:

2 kg of cesium-137 will remain after 60.0 years.

What is Half-life?

The duration needed for a quantity to decrease to half of its initial value is known as the half-life.

Given:

N0 = is the initial amount of cesium-137 = 8.0 Kg

N = is the amount remaining after a time =  Unknown

t =  Duration of cesium-137 decay in 8.0 Kg = 60 years

t1/2 = half-life of cesium-137 = 30.0 years

Formula = N/No = (1/2)^t/t1/2

After putting the value:

N/8= (1/2)^60/30

N/8= (1/2)^2

N/8= 1/4

4N= 8

N= 8/4

N= 2 Kg

As a result, 2 Kg of cesium-137 will be present after 60 years.

Learn more about the half-life here,

brainly.com/question/14018709

#SPJ4

8 0
2 years ago
When using microscopes, what are the two variables that matter the most<br>i think its chemistry.​
PtichkaEL [24]

Answer:

magnification and resolution  

Explanation:

Two parameters are especially important in microscopy: magnification and resolution. Magnification is a measure of how much larger a microscope (or set of lenses within a microscope) causes an object to appear.

4 0
2 years ago
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