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Ivahew [28]
3 years ago
6

HELP IT’S ABOUT TO BE DUE!

Chemistry
1 answer:
Vinil7 [7]3 years ago
7 0
The answer is b
Explanation:
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Fill in the blank with the correct response.
Ganezh [65]

Surveys are the data collection tool and research methods. The questionnaire survey tool is used to collect the data based on questions.

<h3>What are questionnaires?</h3>

Questionnaires are the tool used for the research and the data collection for the analysis, investigation, and conclusion. It is one of the data collection tools that comprises questions and prompts.

Questionnaires are the part of surveys that gathers information on the topic of the research and is easy to analyze and cost-effective. It is a valuable tool that collects data from a large number of participants.

Therefore, the correct blank is the <u>questionnaire</u>.

Learn more about the questionnaire here:

brainly.com/question/20335282

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3 0
1 year ago
A researcher claims that an ancient scroll originated from greek scholars in about 500 bce. a measure of its carbon-14 decay rat
Naddik [55]
The amount of substance present in a certain object with a given half-life in terms of h can be expressed through the equation,

     A(t) = (A(o))(0.5)^(t/h)

where A(t) is the amount of substance after t years and A(o) is the original amount. In this item we are given that A(t)/A(o) is equal to 0.89. Substituting the known values,

     0.89 = (0.5)(t / 5730 years)

The value of t from the equation is 963.34 years.

<em>Answer: 963 years</em>
8 0
3 years ago
Which of the following equations has correct formulas and also is a balanced equation?
aliya0001 [1]

Answer : The correct option is, (B)

Explanation :

Balance equation : Balanced equation are those equation in which the number of atoms of each element and the total charge must be same on products side and reactants side.

In the given options, only option (B) equation has correct formula and also a balanced equation.

2Be+O_2\rightarrow 2BeO

while the other options has incorrect formulas and also an unbalanced equations.

The correct equation for option A is, CaCO_3\rightarrow CaO+CO_2

The correct equation for option C is, 2Mg+O_2\rightarrow 2MgO

The correct equation for option D is, KCl+HNO_3\rightarrow HCl+KNO_3

Hence, the correct answer is, (B) 2Be+O_2\rightarrow 2BeO

5 0
3 years ago
A family pool holds 10,000 gallons of water. How many cubic centimeters is this?
Ierofanga [76]

Answer:

3.785412e+7cm³

Explanation:

Have a nice day.

3 0
2 years ago
Which correctly describes the reaction between potassium and excess water?
nika2105 [10]
Balanced chemical reaction: 2K(s) + 2H₂O(l) → 2KOH(aq) + H₂(g).

KOH is inorganic compound p<span>otassium hydroxide, a strong base.
H</span>₂ is hydrogen gas.
In balanced chemical reaction number of atoms on both side of chemical reaction must be same. There are two potassium atoms, four hydrogen atoms and two oxygen atoms on both side of reaction.
7 0
3 years ago
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